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authorEric Norum <WENorum@lbl.gov>2001-04-16 15:05:47 +0000
committerEric Norum <WENorum@lbl.gov>2001-04-16 15:05:47 +0000
commit3a9d8c8c76e3cabb4db8597167f02e9e9df46f22 (patch)
treeea637f1aae2468734ec5e90adcbde152229527ee
parent58b2e6280bb7534e80baa06a5065793e13546146 (diff)
Useful add-on libraries
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+<HTML>
+<HEAD>
+<!-- This HTML file has been created by texi2html 1.52
+ from /usr/homes/chet/src/bash/readline-src/doc/hist.texinfo on 16 April 2001 -->
+
+<TITLE>GNU History Library</TITLE>
+</HEAD>
+<BODY>
+<H1>GNU History Library</H1>
+<H2>Edition 4.2, for <CODE>History Library</CODE> Version 4.2.</H2>
+<H2>Apr 2001</H2>
+<ADDRESS>Brian Fox, Free Software Foundation</ADDRESS>
+<ADDRESS>Chet Ramey, Case Western Reserve University</ADDRESS>
+<P>
+<P><HR><P>
+<H1>Table of Contents</H1>
+<UL>
+<LI><A NAME="TOC1" HREF="history.html#SEC1">Using History Interactively</A>
+<UL>
+<LI><A NAME="TOC2" HREF="history.html#SEC2">History Expansion</A>
+<UL>
+<LI><A NAME="TOC3" HREF="history.html#SEC3">Event Designators</A>
+<LI><A NAME="TOC4" HREF="history.html#SEC4">Word Designators</A>
+<LI><A NAME="TOC5" HREF="history.html#SEC5">Modifiers</A>
+</UL>
+</UL>
+<LI><A NAME="TOC6" HREF="history.html#SEC6">Programming with GNU History</A>
+<UL>
+<LI><A NAME="TOC7" HREF="history.html#SEC7">Introduction to History</A>
+<LI><A NAME="TOC8" HREF="history.html#SEC8">History Storage</A>
+<LI><A NAME="TOC9" HREF="history.html#SEC9">History Functions</A>
+<UL>
+<LI><A NAME="TOC10" HREF="history.html#SEC10">Initializing History and State Management</A>
+<LI><A NAME="TOC11" HREF="history.html#SEC11">History List Management</A>
+<LI><A NAME="TOC12" HREF="history.html#SEC12">Information About the History List</A>
+<LI><A NAME="TOC13" HREF="history.html#SEC13">Moving Around the History List</A>
+<LI><A NAME="TOC14" HREF="history.html#SEC14">Searching the History List</A>
+<LI><A NAME="TOC15" HREF="history.html#SEC15">Managing the History File</A>
+<LI><A NAME="TOC16" HREF="history.html#SEC16">History Expansion</A>
+</UL>
+<LI><A NAME="TOC17" HREF="history.html#SEC17">History Variables</A>
+<LI><A NAME="TOC18" HREF="history.html#SEC18">History Programming Example</A>
+</UL>
+<LI><A NAME="TOC19" HREF="history.html#SEC19">Concept Index</A>
+<LI><A NAME="TOC20" HREF="history.html#SEC20">Function and Variable Index</A>
+</UL>
+<P><HR><P>
+
+<P>
+This document describes the GNU History library, a programming tool that
+provides a consistent user interface for recalling lines of previously
+typed input.
+
+</P>
+<P>
+Published by the Free Software Foundation <BR>
+59 Temple Place, Suite 330, <BR>
+Boston, MA 02111 USA
+
+</P>
+<P>
+Permission is granted to make and distribute verbatim copies of
+this manual provided the copyright notice and this permission notice
+are preserved on all copies.
+
+</P>
+<P>
+Permission is granted to copy and distribute modified versions of this
+manual under the conditions for verbatim copying, provided that the entire
+resulting derived work is distributed under the terms of a permission
+notice identical to this one.
+
+</P>
+<P>
+Permission is granted to copy and distribute translations of this manual
+into another language, under the above conditions for modified versions,
+except that this permission notice may be stated in a translation approved
+by the Free Software Foundation.
+
+</P>
+<P>
+Copyright (C) 1988-2001 Free Software Foundation, Inc.
+
+</P>
+
+
+
+<H1><A NAME="SEC1" HREF="history.html#TOC1">Using History Interactively</A></H1>
+
+<P>
+This chapter describes how to use the GNU History Library interactively,
+from a user's standpoint. It should be considered a user's guide. For
+information on using the GNU History Library in your own programs,
+see section <A HREF="history.html#SEC6">Programming with GNU History</A>.
+
+</P>
+
+<UL>
+<LI><A HREF="history.html#SEC2">History Interaction</A>: What it feels like using History as a user.
+</UL>
+
+
+
+<H2><A NAME="SEC2" HREF="history.html#TOC2">History Expansion</A></H2>
+<P>
+<A NAME="IDX1"></A>
+
+</P>
+<P>
+The History library provides a history expansion feature that is similar
+to the history expansion provided by <CODE>csh</CODE>. This section
+describes the syntax used to manipulate the history information.
+
+</P>
+<P>
+History expansions introduce words from the history list into
+the input stream, making it easy to repeat commands, insert the
+arguments to a previous command into the current input line, or
+fix errors in previous commands quickly.
+
+</P>
+<P>
+History expansion takes place in two parts. The first is to determine
+which line from the history list should be used during substitution.
+The second is to select portions of that line for inclusion into the
+current one. The line selected from the history is called the
+<EM>event</EM>, and the portions of that line that are acted upon are
+called <EM>words</EM>. Various <EM>modifiers</EM> are available to manipulate
+the selected words. The line is broken into words in the same fashion
+that Bash does, so that several words
+surrounded by quotes are considered one word.
+History expansions are introduced by the appearance of the
+history expansion character, which is <SAMP>`!'</SAMP> by default.
+
+</P>
+
+
+<UL>
+<LI><A HREF="history.html#SEC3">Event Designators</A>: How to specify which history line to use.
+<LI><A HREF="history.html#SEC4">Word Designators</A>: Specifying which words are of interest.
+<LI><A HREF="history.html#SEC5">Modifiers</A>: Modifying the results of substitution.
+</UL>
+
+
+
+<H3><A NAME="SEC3" HREF="history.html#TOC3">Event Designators</A></H3>
+<P>
+<A NAME="IDX2"></A>
+
+</P>
+<P>
+An event designator is a reference to a command line entry in the
+history list.
+<A NAME="IDX3"></A>
+
+</P>
+<DL COMPACT>
+
+<DT><CODE>!</CODE>
+<DD>
+Start a history substitution, except when followed by a space, tab,
+the end of the line, <SAMP>`='</SAMP> or <SAMP>`('</SAMP>.
+
+<DT><CODE>!<VAR>n</VAR></CODE>
+<DD>
+Refer to command line <VAR>n</VAR>.
+
+<DT><CODE>!-<VAR>n</VAR></CODE>
+<DD>
+Refer to the command <VAR>n</VAR> lines back.
+
+<DT><CODE>!!</CODE>
+<DD>
+Refer to the previous command. This is a synonym for <SAMP>`!-1'</SAMP>.
+
+<DT><CODE>!<VAR>string</VAR></CODE>
+<DD>
+Refer to the most recent command starting with <VAR>string</VAR>.
+
+<DT><CODE>!?<VAR>string</VAR>[?]</CODE>
+<DD>
+Refer to the most recent command containing <VAR>string</VAR>. The trailing
+<SAMP>`?'</SAMP> may be omitted if the <VAR>string</VAR> is followed immediately by
+a newline.
+
+<DT><CODE>^<VAR>string1</VAR>^<VAR>string2</VAR>^</CODE>
+<DD>
+Quick Substitution. Repeat the last command, replacing <VAR>string1</VAR>
+with <VAR>string2</VAR>. Equivalent to
+<CODE>!!:s/<VAR>string1</VAR>/<VAR>string2</VAR>/</CODE>.
+
+<DT><CODE>!#</CODE>
+<DD>
+The entire command line typed so far.
+
+</DL>
+
+
+
+<H3><A NAME="SEC4" HREF="history.html#TOC4">Word Designators</A></H3>
+
+<P>
+Word designators are used to select desired words from the event.
+A <SAMP>`:'</SAMP> separates the event specification from the word designator. It
+may be omitted if the word designator begins with a <SAMP>`^'</SAMP>, <SAMP>`$'</SAMP>,
+<SAMP>`*'</SAMP>, <SAMP>`-'</SAMP>, or <SAMP>`%'</SAMP>. Words are numbered from the beginning
+of the line, with the first word being denoted by 0 (zero). Words are
+inserted into the current line separated by single spaces.
+
+</P>
+<P>
+For example,
+
+</P>
+<DL COMPACT>
+
+<DT><CODE>!!</CODE>
+<DD>
+designates the preceding command. When you type this, the preceding
+command is repeated in toto.
+
+<DT><CODE>!!:$</CODE>
+<DD>
+designates the last argument of the preceding command. This may be
+shortened to <CODE>!$</CODE>.
+
+<DT><CODE>!fi:2</CODE>
+<DD>
+designates the second argument of the most recent command starting with
+the letters <CODE>fi</CODE>.
+</DL>
+
+<P>
+Here are the word designators:
+
+<DL COMPACT>
+
+<DT><CODE>0 (zero)</CODE>
+<DD>
+The <CODE>0</CODE>th word. For many applications, this is the command word.
+
+<DT><CODE><VAR>n</VAR></CODE>
+<DD>
+The <VAR>n</VAR>th word.
+
+<DT><CODE>^</CODE>
+<DD>
+The first argument; that is, word 1.
+
+<DT><CODE>$</CODE>
+<DD>
+The last argument.
+
+<DT><CODE>%</CODE>
+<DD>
+The word matched by the most recent <SAMP>`?<VAR>string</VAR>?'</SAMP> search.
+
+<DT><CODE><VAR>x</VAR>-<VAR>y</VAR></CODE>
+<DD>
+A range of words; <SAMP>`-<VAR>y</VAR>'</SAMP> abbreviates <SAMP>`0-<VAR>y</VAR>'</SAMP>.
+
+<DT><CODE>*</CODE>
+<DD>
+All of the words, except the <CODE>0</CODE>th. This is a synonym for <SAMP>`1-$'</SAMP>.
+It is not an error to use <SAMP>`*'</SAMP> if there is just one word in the event;
+the empty string is returned in that case.
+
+<DT><CODE><VAR>x</VAR>*</CODE>
+<DD>
+Abbreviates <SAMP>`<VAR>x</VAR>-$'</SAMP>
+
+<DT><CODE><VAR>x</VAR>-</CODE>
+<DD>
+Abbreviates <SAMP>`<VAR>x</VAR>-$'</SAMP> like <SAMP>`<VAR>x</VAR>*'</SAMP>, but omits the last word.
+
+</DL>
+
+<P>
+If a word designator is supplied without an event specification, the
+previous command is used as the event.
+
+</P>
+
+
+<H3><A NAME="SEC5" HREF="history.html#TOC5">Modifiers</A></H3>
+
+<P>
+After the optional word designator, you can add a sequence of one or more
+of the following modifiers, each preceded by a <SAMP>`:'</SAMP>.
+
+</P>
+<DL COMPACT>
+
+<DT><CODE>h</CODE>
+<DD>
+Remove a trailing pathname component, leaving only the head.
+
+<DT><CODE>t</CODE>
+<DD>
+Remove all leading pathname components, leaving the tail.
+
+<DT><CODE>r</CODE>
+<DD>
+Remove a trailing suffix of the form <SAMP>`.<VAR>suffix</VAR>'</SAMP>, leaving
+the basename.
+
+<DT><CODE>e</CODE>
+<DD>
+Remove all but the trailing suffix.
+
+<DT><CODE>p</CODE>
+<DD>
+Print the new command but do not execute it.
+
+<DT><CODE>s/<VAR>old</VAR>/<VAR>new</VAR>/</CODE>
+<DD>
+Substitute <VAR>new</VAR> for the first occurrence of <VAR>old</VAR> in the
+event line. Any delimiter may be used in place of <SAMP>`/'</SAMP>.
+The delimiter may be quoted in <VAR>old</VAR> and <VAR>new</VAR>
+with a single backslash. If <SAMP>`&#38;'</SAMP> appears in <VAR>new</VAR>,
+it is replaced by <VAR>old</VAR>. A single backslash will quote
+the <SAMP>`&#38;'</SAMP>. The final delimiter is optional if it is the last
+character on the input line.
+
+<DT><CODE>&#38;</CODE>
+<DD>
+Repeat the previous substitution.
+
+<DT><CODE>g</CODE>
+<DD>
+Cause changes to be applied over the entire event line. Used in
+conjunction with <SAMP>`s'</SAMP>, as in <CODE>gs/<VAR>old</VAR>/<VAR>new</VAR>/</CODE>,
+or with <SAMP>`&#38;'</SAMP>.
+
+</DL>
+
+
+
+<H1><A NAME="SEC6" HREF="history.html#TOC6">Programming with GNU History</A></H1>
+
+<P>
+This chapter describes how to interface programs that you write
+with the GNU History Library.
+It should be considered a technical guide.
+For information on the interactive use of GNU History, see section <A HREF="history.html#SEC1">Using History Interactively</A>.
+
+</P>
+
+<UL>
+<LI><A HREF="history.html#SEC7">Introduction to History</A>: What is the GNU History library for?
+<LI><A HREF="history.html#SEC8">History Storage</A>: How information is stored.
+<LI><A HREF="history.html#SEC9">History Functions</A>: Functions that you can use.
+<LI><A HREF="history.html#SEC17">History Variables</A>: Variables that control behaviour.
+<LI><A HREF="history.html#SEC18">History Programming Example</A>: Example of using the GNU History Library.
+</UL>
+
+
+
+<H2><A NAME="SEC7" HREF="history.html#TOC7">Introduction to History</A></H2>
+
+<P>
+Many programs read input from the user a line at a time. The GNU
+History library is able to keep track of those lines, associate arbitrary
+data with each line, and utilize information from previous lines in
+composing new ones.
+
+</P>
+<P>
+The programmer using the History library has available functions
+for remembering lines on a history list, associating arbitrary data
+with a line, removing lines from the list, searching through the list
+for a line containing an arbitrary text string, and referencing any line
+in the list directly. In addition, a history <EM>expansion</EM> function
+is available which provides for a consistent user interface across
+different programs.
+
+</P>
+<P>
+The user using programs written with the History library has the
+benefit of a consistent user interface with a set of well-known
+commands for manipulating the text of previous lines and using that text
+in new commands. The basic history manipulation commands are similar to
+the history substitution provided by <CODE>csh</CODE>.
+
+</P>
+<P>
+If the programmer desires, he can use the Readline library, which
+includes some history manipulation by default, and has the added
+advantage of command line editing.
+
+</P>
+<P>
+Before declaring any functions using any functionality the History
+library provides in other code, an application writer should include
+the file <CODE>&#60;readline/history.h&#62;</CODE> in any file that uses the
+History library's features. It supplies extern declarations for all
+of the library's public functions and variables, and declares all of
+the public data structures.
+
+</P>
+
+
+<H2><A NAME="SEC8" HREF="history.html#TOC8">History Storage</A></H2>
+
+<P>
+The history list is an array of history entries. A history entry is
+declared as follows:
+
+</P>
+
+<PRE>
+typedef void *histdata_t;
+
+typedef struct _hist_entry {
+ char *line;
+ histdata_t data;
+} HIST_ENTRY;
+</PRE>
+
+<P>
+The history list itself might therefore be declared as
+
+</P>
+
+<PRE>
+HIST_ENTRY **the_history_list;
+</PRE>
+
+<P>
+The state of the History library is encapsulated into a single structure:
+
+</P>
+
+<PRE>
+/*
+ * A structure used to pass around the current state of the history.
+ */
+typedef struct _hist_state {
+ HIST_ENTRY **entries; /* Pointer to the entries themselves. */
+ int offset; /* The location pointer within this array. */
+ int length; /* Number of elements within this array. */
+ int size; /* Number of slots allocated to this array. */
+ int flags;
+} HISTORY_STATE;
+</PRE>
+
+<P>
+If the flags member includes <CODE>HS_STIFLED</CODE>, the history has been
+stifled.
+
+</P>
+
+
+<H2><A NAME="SEC9" HREF="history.html#TOC9">History Functions</A></H2>
+
+<P>
+This section describes the calling sequence for the various functions
+exported by the GNU History library.
+
+</P>
+
+<UL>
+<LI><A HREF="history.html#SEC10">Initializing History and State Management</A>: Functions to call when you
+ want to use history in a
+ program.
+<LI><A HREF="history.html#SEC11">History List Management</A>: Functions used to manage the list
+ of history entries.
+<LI><A HREF="history.html#SEC12">Information About the History List</A>: Functions returning information about
+ the history list.
+<LI><A HREF="history.html#SEC13">Moving Around the History List</A>: Functions used to change the position
+ in the history list.
+<LI><A HREF="history.html#SEC14">Searching the History List</A>: Functions to search the history list
+ for entries containing a string.
+<LI><A HREF="history.html#SEC15">Managing the History File</A>: Functions that read and write a file
+ containing the history list.
+<LI><A HREF="history.html#SEC16">History Expansion</A>: Functions to perform csh-like history
+ expansion.
+</UL>
+
+
+
+<H3><A NAME="SEC10" HREF="history.html#TOC10">Initializing History and State Management</A></H3>
+
+<P>
+This section describes functions used to initialize and manage
+the state of the History library when you want to use the history
+functions in your program.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>using_history</B> <I>(void)</I>
+<DD><A NAME="IDX4"></A>
+Begin a session in which the history functions might be used. This
+initializes the interactive variables.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> HISTORY_STATE * <B>history_get_history_state</B> <I>(void)</I>
+<DD><A NAME="IDX5"></A>
+Return a structure describing the current state of the input history.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>history_set_history_state</B> <I>(HISTORY_STATE *state)</I>
+<DD><A NAME="IDX6"></A>
+Set the state of the history list according to <VAR>state</VAR>.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC11" HREF="history.html#TOC11">History List Management</A></H3>
+
+<P>
+These functions manage individual entries on the history list, or set
+parameters managing the list itself.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>add_history</B> <I>(const char *string)</I>
+<DD><A NAME="IDX7"></A>
+Place <VAR>string</VAR> at the end of the history list. The associated data
+field (if any) is set to <CODE>NULL</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> HIST_ENTRY * <B>remove_history</B> <I>(int which)</I>
+<DD><A NAME="IDX8"></A>
+Remove history entry at offset <VAR>which</VAR> from the history. The
+removed element is returned so you can free the line, data,
+and containing structure.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> HIST_ENTRY * <B>replace_history_entry</B> <I>(int which, const char *line, histdata_t data)</I>
+<DD><A NAME="IDX9"></A>
+Make the history entry at offset <VAR>which</VAR> have <VAR>line</VAR> and <VAR>data</VAR>.
+This returns the old entry so you can dispose of the data. In the case
+of an invalid <VAR>which</VAR>, a <CODE>NULL</CODE> pointer is returned.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>clear_history</B> <I>(void)</I>
+<DD><A NAME="IDX10"></A>
+Clear the history list by deleting all the entries.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>stifle_history</B> <I>(int max)</I>
+<DD><A NAME="IDX11"></A>
+Stifle the history list, remembering only the last <VAR>max</VAR> entries.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>unstifle_history</B> <I>(void)</I>
+<DD><A NAME="IDX12"></A>
+Stop stifling the history. This returns the previous amount the
+history was stifled. The value is positive if the history was
+stifled, negative if it wasn't.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>history_is_stifled</B> <I>(void)</I>
+<DD><A NAME="IDX13"></A>
+Returns non-zero if the history is stifled, zero if it is not.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC12" HREF="history.html#TOC12">Information About the History List</A></H3>
+
+<P>
+These functions return information about the entire history list or
+individual list entries.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> HIST_ENTRY ** <B>history_list</B> <I>(void)</I>
+<DD><A NAME="IDX14"></A>
+Return a <CODE>NULL</CODE> terminated array of <CODE>HIST_ENTRY *</CODE> which is the
+current input history. Element 0 of this list is the beginning of time.
+If there is no history, return <CODE>NULL</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>where_history</B> <I>(void)</I>
+<DD><A NAME="IDX15"></A>
+Returns the offset of the current history element.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> HIST_ENTRY * <B>current_history</B> <I>(void)</I>
+<DD><A NAME="IDX16"></A>
+Return the history entry at the current position, as determined by
+<CODE>where_history()</CODE>. If there is no entry there, return a <CODE>NULL</CODE>
+pointer.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> HIST_ENTRY * <B>history_get</B> <I>(int offset)</I>
+<DD><A NAME="IDX17"></A>
+Return the history entry at position <VAR>offset</VAR>, starting from
+<CODE>history_base</CODE> (see section <A HREF="history.html#SEC17">History Variables</A>).
+If there is no entry there, or if <VAR>offset</VAR>
+is greater than the history length, return a <CODE>NULL</CODE> pointer.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>history_total_bytes</B> <I>(void)</I>
+<DD><A NAME="IDX18"></A>
+Return the number of bytes that the primary history entries are using.
+This function returns the sum of the lengths of all the lines in the
+history.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC13" HREF="history.html#TOC13">Moving Around the History List</A></H3>
+
+<P>
+These functions allow the current index into the history list to be
+set or changed.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>history_set_pos</B> <I>(int pos)</I>
+<DD><A NAME="IDX19"></A>
+Set the current history offset to <VAR>pos</VAR>, an absolute index
+into the list.
+Returns 1 on success, 0 if <VAR>pos</VAR> is less than zero or greater
+than the number of history entries.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> HIST_ENTRY * <B>previous_history</B> <I>(void)</I>
+<DD><A NAME="IDX20"></A>
+Back up the current history offset to the previous history entry, and
+return a pointer to that entry. If there is no previous entry, return
+a <CODE>NULL</CODE> pointer.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> HIST_ENTRY * <B>next_history</B> <I>(void)</I>
+<DD><A NAME="IDX21"></A>
+Move the current history offset forward to the next history entry, and
+return the a pointer to that entry. If there is no next entry, return
+a <CODE>NULL</CODE> pointer.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC14" HREF="history.html#TOC14">Searching the History List</A></H3>
+<P>
+<A NAME="IDX22"></A>
+
+</P>
+<P>
+These functions allow searching of the history list for entries containing
+a specific string. Searching may be performed both forward and backward
+from the current history position. The search may be <EM>anchored</EM>,
+meaning that the string must match at the beginning of the history entry.
+<A NAME="IDX23"></A>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>history_search</B> <I>(const char *string, int direction)</I>
+<DD><A NAME="IDX24"></A>
+Search the history for <VAR>string</VAR>, starting at the current history offset.
+If <VAR>direction</VAR> is less than 0, then the search is through
+previous entries, otherwise through subsequent entries.
+If <VAR>string</VAR> is found, then
+the current history index is set to that history entry, and the value
+returned is the offset in the line of the entry where
+<VAR>string</VAR> was found. Otherwise, nothing is changed, and a -1 is
+returned.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>history_search_prefix</B> <I>(const char *string, int direction)</I>
+<DD><A NAME="IDX25"></A>
+Search the history for <VAR>string</VAR>, starting at the current history
+offset. The search is anchored: matching lines must begin with
+<VAR>string</VAR>. If <VAR>direction</VAR> is less than 0, then the search is
+through previous entries, otherwise through subsequent entries.
+If <VAR>string</VAR> is found, then the
+current history index is set to that entry, and the return value is 0.
+Otherwise, nothing is changed, and a -1 is returned.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>history_search_pos</B> <I>(const char *string, int direction, int pos)</I>
+<DD><A NAME="IDX26"></A>
+Search for <VAR>string</VAR> in the history list, starting at <VAR>pos</VAR>, an
+absolute index into the list. If <VAR>direction</VAR> is negative, the search
+proceeds backward from <VAR>pos</VAR>, otherwise forward. Returns the absolute
+index of the history element where <VAR>string</VAR> was found, or -1 otherwise.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC15" HREF="history.html#TOC15">Managing the History File</A></H3>
+
+<P>
+The History library can read the history from and write it to a file.
+This section documents the functions for managing a history file.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>read_history</B> <I>(const char *filename)</I>
+<DD><A NAME="IDX27"></A>
+Add the contents of <VAR>filename</VAR> to the history list, a line at a time.
+If <VAR>filename</VAR> is <CODE>NULL</CODE>, then read from <TT>`~/.history'</TT>.
+Returns 0 if successful, or <CODE>errno</CODE> if not.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>read_history_range</B> <I>(const char *filename, int from, int to)</I>
+<DD><A NAME="IDX28"></A>
+Read a range of lines from <VAR>filename</VAR>, adding them to the history list.
+Start reading at line <VAR>from</VAR> and end at <VAR>to</VAR>.
+If <VAR>from</VAR> is zero, start at the beginning. If <VAR>to</VAR> is less than
+<VAR>from</VAR>, then read until the end of the file. If <VAR>filename</VAR> is
+<CODE>NULL</CODE>, then read from <TT>`~/.history'</TT>. Returns 0 if successful,
+or <CODE>errno</CODE> if not.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>write_history</B> <I>(const char *filename)</I>
+<DD><A NAME="IDX29"></A>
+Write the current history to <VAR>filename</VAR>, overwriting <VAR>filename</VAR>
+if necessary.
+If <VAR>filename</VAR> is <CODE>NULL</CODE>, then write the history list to
+<TT>`~/.history'</TT>.
+Returns 0 on success, or <CODE>errno</CODE> on a read or write error.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>append_history</B> <I>(int nelements, const char *filename)</I>
+<DD><A NAME="IDX30"></A>
+Append the last <VAR>nelements</VAR> of the history list to <VAR>filename</VAR>.
+If <VAR>filename</VAR> is <CODE>NULL</CODE>, then append to <TT>`~/.history'</TT>.
+Returns 0 on success, or <CODE>errno</CODE> on a read or write error.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>history_truncate_file</B> <I>(const char *filename, int nlines)</I>
+<DD><A NAME="IDX31"></A>
+Truncate the history file <VAR>filename</VAR>, leaving only the last
+<VAR>nlines</VAR> lines.
+If <VAR>filename</VAR> is <CODE>NULL</CODE>, then <TT>`~/.history'</TT> is truncated.
+Returns 0 on success, or <CODE>errno</CODE> on failure.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC16" HREF="history.html#TOC16">History Expansion</A></H3>
+
+<P>
+These functions implement history expansion.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>history_expand</B> <I>(char *string, char **output)</I>
+<DD><A NAME="IDX32"></A>
+Expand <VAR>string</VAR>, placing the result into <VAR>output</VAR>, a pointer
+to a string (see section <A HREF="history.html#SEC2">History Expansion</A>). Returns:
+<DL COMPACT>
+
+<DT><CODE>0</CODE>
+<DD>
+If no expansions took place (or, if the only change in
+the text was the removal of escape characters preceding the history expansion
+character);
+<DT><CODE>1</CODE>
+<DD>
+if expansions did take place;
+<DT><CODE>-1</CODE>
+<DD>
+if there was an error in expansion;
+<DT><CODE>2</CODE>
+<DD>
+if the returned line should be displayed, but not executed,
+as with the <CODE>:p</CODE> modifier (see section <A HREF="history.html#SEC5">Modifiers</A>).
+</DL>
+
+<P>
+If an error ocurred in expansion, then <VAR>output</VAR> contains a descriptive
+error message.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> char * <B>get_history_event</B> <I>(const char *string, int *cindex, int qchar)</I>
+<DD><A NAME="IDX33"></A>
+Returns the text of the history event beginning at <VAR>string</VAR> +
+<VAR>*cindex</VAR>. <VAR>*cindex</VAR> is modified to point to after the event
+specifier. At function entry, <VAR>cindex</VAR> points to the index into
+<VAR>string</VAR> where the history event specification begins. <VAR>qchar</VAR>
+is a character that is allowed to end the event specification in addition
+to the "normal" terminating characters.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> char ** <B>history_tokenize</B> <I>(const char *string)</I>
+<DD><A NAME="IDX34"></A>
+Return an array of tokens parsed out of <VAR>string</VAR>, much as the
+shell might. The tokens are split on the characters in the
+<VAR>history_word_delimiters</VAR> variable,
+and shell quoting conventions are obeyed.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> char * <B>history_arg_extract</B> <I>(int first, int last, const char *string)</I>
+<DD><A NAME="IDX35"></A>
+Extract a string segment consisting of the <VAR>first</VAR> through <VAR>last</VAR>
+arguments present in <VAR>string</VAR>. Arguments are split using
+<CODE>history_tokenize</CODE>.
+</DL>
+
+</P>
+
+
+<H2><A NAME="SEC17" HREF="history.html#TOC17">History Variables</A></H2>
+
+<P>
+This section describes the externally-visible variables exported by
+the GNU History Library.
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>history_base</B>
+<DD><A NAME="IDX36"></A>
+The logical offset of the first entry in the history list.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>history_length</B>
+<DD><A NAME="IDX37"></A>
+The number of entries currently stored in the history list.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>history_max_entries</B>
+<DD><A NAME="IDX38"></A>
+The maximum number of history entries. This must be changed using
+<CODE>stifle_history()</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> char <B>history_expansion_char</B>
+<DD><A NAME="IDX39"></A>
+The character that introduces a history event. The default is <SAMP>`!'</SAMP>.
+Setting this to 0 inhibits history expansion.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> char <B>history_subst_char</B>
+<DD><A NAME="IDX40"></A>
+The character that invokes word substitution if found at the start of
+a line. The default is <SAMP>`^'</SAMP>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> char <B>history_comment_char</B>
+<DD><A NAME="IDX41"></A>
+During tokenization, if this character is seen as the first character
+of a word, then it and all subsequent characters up to a newline are
+ignored, suppressing history expansion for the remainder of the line.
+This is disabled by default.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> char * <B>history_word_delimiters</B>
+<DD><A NAME="IDX42"></A>
+The characters that separate tokens for \fBhistory_tokenize()\fP.
+The default value is <CODE>" \t\n()&#60;&#62;;&#38;|"</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> char * <B>history_no_expand_chars</B>
+<DD><A NAME="IDX43"></A>
+The list of characters which inhibit history expansion if found immediately
+following <VAR>history_expansion_char</VAR>. The default is space, tab, newline,
+carriage return, and <SAMP>`='</SAMP>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> char * <B>history_search_delimiter_chars</B>
+<DD><A NAME="IDX44"></A>
+The list of additional characters which can delimit a history search
+string, in addition to space, TAB, <SAMP>`:'</SAMP> and <SAMP>`?'</SAMP> in the case of
+a substring search. The default is empty.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>history_quotes_inhibit_expansion</B>
+<DD><A NAME="IDX45"></A>
+If non-zero, single-quoted words are not scanned for the history expansion
+character. The default value is 0.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_linebuf_func_t * <B>history_inhibit_expansion_function</B>
+<DD><A NAME="IDX46"></A>
+This should be set to the address of a function that takes two arguments:
+a <CODE>char *</CODE> (<VAR>string</VAR>)
+and an <CODE>int</CODE> index into that string (<VAR>i</VAR>).
+It should return a non-zero value if the history expansion starting at
+<VAR>string[i]</VAR> should not be performed; zero if the expansion should
+be done.
+It is intended for use by applications like Bash that use the history
+expansion character for additional purposes.
+By default, this variable is set to <CODE>NULL</CODE>.
+</DL>
+
+</P>
+
+
+<H2><A NAME="SEC18" HREF="history.html#TOC18">History Programming Example</A></H2>
+
+<P>
+The following program demonstrates simple use of the GNU History Library.
+
+</P>
+
+<PRE>
+#include &#60;stdio.h&#62;
+#include &#60;readline/history.h&#62;
+
+main (argc, argv)
+ int argc;
+ char **argv;
+{
+ char line[1024], *t;
+ int len, done = 0;
+
+ line[0] = 0;
+
+ using_history ();
+ while (!done)
+ {
+ printf ("history$ ");
+ fflush (stdout);
+ t = fgets (line, sizeof (line) - 1, stdin);
+ if (t &#38;&#38; *t)
+ {
+ len = strlen (t);
+ if (t[len - 1] == '\n')
+ t[len - 1] = '\0';
+ }
+
+ if (!t)
+ strcpy (line, "quit");
+
+ if (line[0])
+ {
+ char *expansion;
+ int result;
+
+ result = history_expand (line, &#38;expansion);
+ if (result)
+ fprintf (stderr, "%s\n", expansion);
+
+ if (result &#60; 0 || result == 2)
+ {
+ free (expansion);
+ continue;
+ }
+
+ add_history (expansion);
+ strncpy (line, expansion, sizeof (line) - 1);
+ free (expansion);
+ }
+
+ if (strcmp (line, "quit") == 0)
+ done = 1;
+ else if (strcmp (line, "save") == 0)
+ write_history ("history_file");
+ else if (strcmp (line, "read") == 0)
+ read_history ("history_file");
+ else if (strcmp (line, "list") == 0)
+ {
+ register HIST_ENTRY **the_list;
+ register int i;
+
+ the_list = history_list ();
+ if (the_list)
+ for (i = 0; the_list[i]; i++)
+ printf ("%d: %s\n", i + history_base, the_list[i]-&#62;line);
+ }
+ else if (strncmp (line, "delete", 6) == 0)
+ {
+ int which;
+ if ((sscanf (line + 6, "%d", &#38;which)) == 1)
+ {
+ HIST_ENTRY *entry = remove_history (which);
+ if (!entry)
+ fprintf (stderr, "No such entry %d\n", which);
+ else
+ {
+ free (entry-&#62;line);
+ free (entry);
+ }
+ }
+ else
+ {
+ fprintf (stderr, "non-numeric arg given to `delete'\n");
+ }
+ }
+ }
+}
+</PRE>
+
+
+
+<H1><A NAME="SEC19" HREF="history.html#TOC19">Concept Index</A></H1>
+<P>
+Jump to:
+<A HREF="#cindex_a">a</A>
+-
+<A HREF="#cindex_e">e</A>
+-
+<A HREF="#cindex_h">h</A>
+<P>
+<H2><A NAME="cindex_a">a</A></H2>
+<DIR>
+<LI><A HREF="history.html#IDX23">anchored search</A>
+</DIR>
+<H2><A NAME="cindex_e">e</A></H2>
+<DIR>
+<LI><A HREF="history.html#IDX2">event designators</A>
+</DIR>
+<H2><A NAME="cindex_h">h</A></H2>
+<DIR>
+<LI><A HREF="history.html#IDX3">history events</A>
+<LI><A HREF="history.html#IDX1">history expansion</A>
+<LI><A HREF="history.html#IDX22">History Searching</A>
+</DIR>
+
+</P>
+
+
+<H1><A NAME="SEC20" HREF="history.html#TOC20">Function and Variable Index</A></H1>
+<P>
+Jump to:
+<A HREF="#vindex_a">a</A>
+-
+<A HREF="#vindex_c">c</A>
+-
+<A HREF="#vindex_g">g</A>
+-
+<A HREF="#vindex_h">h</A>
+-
+<A HREF="#vindex_n">n</A>
+-
+<A HREF="#vindex_p">p</A>
+-
+<A HREF="#vindex_r">r</A>
+-
+<A HREF="#vindex_s">s</A>
+-
+<A HREF="#vindex_u">u</A>
+-
+<A HREF="#vindex_w">w</A>
+<P>
+<H2><A NAME="vindex_a">a</A></H2>
+<DIR>
+<LI><A HREF="history.html#IDX7">add_history</A>
+<LI><A HREF="history.html#IDX30">append_history</A>
+</DIR>
+<H2><A NAME="vindex_c">c</A></H2>
+<DIR>
+<LI><A HREF="history.html#IDX10">clear_history</A>
+<LI><A HREF="history.html#IDX16">current_history</A>
+</DIR>
+<H2><A NAME="vindex_g">g</A></H2>
+<DIR>
+<LI><A HREF="history.html#IDX33">get_history_event</A>
+</DIR>
+<H2><A NAME="vindex_h">h</A></H2>
+<DIR>
+<LI><A HREF="history.html#IDX35">history_arg_extract</A>
+<LI><A HREF="history.html#IDX36">history_base</A>
+<LI><A HREF="history.html#IDX41">history_comment_char</A>
+<LI><A HREF="history.html#IDX32">history_expand</A>
+<LI><A HREF="history.html#IDX39">history_expansion_char</A>
+<LI><A HREF="history.html#IDX17">history_get</A>
+<LI><A HREF="history.html#IDX5">history_get_history_state</A>
+<LI><A HREF="history.html#IDX46">history_inhibit_expansion_function</A>
+<LI><A HREF="history.html#IDX13">history_is_stifled</A>
+<LI><A HREF="history.html#IDX37">history_length</A>
+<LI><A HREF="history.html#IDX14">history_list</A>
+<LI><A HREF="history.html#IDX38">history_max_entries</A>
+<LI><A HREF="history.html#IDX43">history_no_expand_chars</A>
+<LI><A HREF="history.html#IDX45">history_quotes_inhibit_expansion</A>
+<LI><A HREF="history.html#IDX24">history_search</A>
+<LI><A HREF="history.html#IDX44">history_search_delimiter_chars</A>
+<LI><A HREF="history.html#IDX26">history_search_pos</A>
+<LI><A HREF="history.html#IDX25">history_search_prefix</A>
+<LI><A HREF="history.html#IDX6">history_set_history_state</A>
+<LI><A HREF="history.html#IDX19">history_set_pos</A>
+<LI><A HREF="history.html#IDX40">history_subst_char</A>
+<LI><A HREF="history.html#IDX34">history_tokenize</A>
+<LI><A HREF="history.html#IDX18">history_total_bytes</A>
+<LI><A HREF="history.html#IDX31">history_truncate_file</A>
+<LI><A HREF="history.html#IDX42">history_word_delimiters</A>
+</DIR>
+<H2><A NAME="vindex_n">n</A></H2>
+<DIR>
+<LI><A HREF="history.html#IDX21">next_history</A>
+</DIR>
+<H2><A NAME="vindex_p">p</A></H2>
+<DIR>
+<LI><A HREF="history.html#IDX20">previous_history</A>
+</DIR>
+<H2><A NAME="vindex_r">r</A></H2>
+<DIR>
+<LI><A HREF="history.html#IDX27">read_history</A>
+<LI><A HREF="history.html#IDX28">read_history_range</A>
+<LI><A HREF="history.html#IDX8">remove_history</A>
+<LI><A HREF="history.html#IDX9">replace_history_entry</A>
+</DIR>
+<H2><A NAME="vindex_s">s</A></H2>
+<DIR>
+<LI><A HREF="history.html#IDX11">stifle_history</A>
+</DIR>
+<H2><A NAME="vindex_u">u</A></H2>
+<DIR>
+<LI><A HREF="history.html#IDX12">unstifle_history</A>
+<LI><A HREF="history.html#IDX4">using_history</A>
+</DIR>
+<H2><A NAME="vindex_w">w</A></H2>
+<DIR>
+<LI><A HREF="history.html#IDX15">where_history</A>
+<LI><A HREF="history.html#IDX29">write_history</A>
+</DIR>
+
+</P>
+<P><HR><P>
+This document was generated on 16 April 2001 using the
+<A HREF="http://wwwinfo.cern.ch/dis/texi2html/">texi2html</A>
+translator version 1.52.</P>
+</BODY>
+</HTML>
diff --git a/readline-4.2/doc/history.info b/readline-4.2/doc/history.info
new file mode 100644
index 0000000..5db15f6
--- /dev/null
+++ b/readline-4.2/doc/history.info
@@ -0,0 +1,839 @@
+This is history.info, produced by makeinfo version 4.0 from
+/usr/homes/chet/src/bash/readline-src/doc/hist.texinfo.
+
+INFO-DIR-SECTION Libraries
+START-INFO-DIR-ENTRY
+* History: (history). The GNU history library API
+END-INFO-DIR-ENTRY
+
+ This document describes the GNU History library, a programming tool
+that provides a consistent user interface for recalling lines of
+previously typed input.
+
+ Copyright (C) 1988-2001 Free Software Foundation, Inc.
+
+ Permission is granted to make and distribute verbatim copies of this
+manual provided the copyright notice and this permission notice pare
+preserved on all copies.
+
+ Permission is granted to copy and distribute modified versions of
+this manual under the conditions for verbatim copying, provided that
+the entire resulting derived work is distributed under the terms of a
+permission notice identical to this one.
+
+ Permission is granted to copy and distribute translations of this
+manual into another language, under the above conditions for modified
+versions, except that this permission notice may be stated in a
+translation approved by the Free Software Foundation.
+
+
+File: history.info, Node: Top, Next: Using History Interactively, Up: (dir)
+
+GNU History Library
+*******************
+
+ This document describes the GNU History library, a programming tool
+that provides a consistent user interface for recalling lines of
+previously typed input.
+
+* Menu:
+
+* Using History Interactively:: GNU History User's Manual.
+* Programming with GNU History:: GNU History Programmer's Manual.
+* Concept Index:: Index of concepts described in this manual.
+* Function and Variable Index:: Index of externally visible functions
+ and variables.
+
+
+File: history.info, Node: Using History Interactively, Next: Programming with GNU History, Prev: Top, Up: Top
+
+Using History Interactively
+***************************
+
+ This chapter describes how to use the GNU History Library
+interactively, from a user's standpoint. It should be considered a
+user's guide. For information on using the GNU History Library in your
+own programs, *note Programming with GNU History::.
+
+* Menu:
+
+* History Interaction:: What it feels like using History as a user.
+
+
+File: history.info, Node: History Interaction, Up: Using History Interactively
+
+History Expansion
+=================
+
+ The History library provides a history expansion feature that is
+similar to the history expansion provided by `csh'. This section
+describes the syntax used to manipulate the history information.
+
+ History expansions introduce words from the history list into the
+input stream, making it easy to repeat commands, insert the arguments
+to a previous command into the current input line, or fix errors in
+previous commands quickly.
+
+ History expansion takes place in two parts. The first is to
+determine which line from the history list should be used during
+substitution. The second is to select portions of that line for
+inclusion into the current one. The line selected from the history is
+called the "event", and the portions of that line that are acted upon
+are called "words". Various "modifiers" are available to manipulate
+the selected words. The line is broken into words in the same fashion
+that Bash does, so that several words surrounded by quotes are
+considered one word. History expansions are introduced by the
+appearance of the history expansion character, which is `!' by default.
+
+* Menu:
+
+* Event Designators:: How to specify which history line to use.
+* Word Designators:: Specifying which words are of interest.
+* Modifiers:: Modifying the results of substitution.
+
+
+File: history.info, Node: Event Designators, Next: Word Designators, Up: History Interaction
+
+Event Designators
+-----------------
+
+ An event designator is a reference to a command line entry in the
+history list.
+
+`!'
+ Start a history substitution, except when followed by a space, tab,
+ the end of the line, `=' or `('.
+
+`!N'
+ Refer to command line N.
+
+`!-N'
+ Refer to the command N lines back.
+
+`!!'
+ Refer to the previous command. This is a synonym for `!-1'.
+
+`!STRING'
+ Refer to the most recent command starting with STRING.
+
+`!?STRING[?]'
+ Refer to the most recent command containing STRING. The trailing
+ `?' may be omitted if the STRING is followed immediately by a
+ newline.
+
+`^STRING1^STRING2^'
+ Quick Substitution. Repeat the last command, replacing STRING1
+ with STRING2. Equivalent to `!!:s/STRING1/STRING2/'.
+
+`!#'
+ The entire command line typed so far.
+
+
+File: history.info, Node: Word Designators, Next: Modifiers, Prev: Event Designators, Up: History Interaction
+
+Word Designators
+----------------
+
+ Word designators are used to select desired words from the event. A
+`:' separates the event specification from the word designator. It may
+be omitted if the word designator begins with a `^', `$', `*', `-', or
+`%'. Words are numbered from the beginning of the line, with the first
+word being denoted by 0 (zero). Words are inserted into the current
+line separated by single spaces.
+
+ For example,
+
+`!!'
+ designates the preceding command. When you type this, the
+ preceding command is repeated in toto.
+
+`!!:$'
+ designates the last argument of the preceding command. This may be
+ shortened to `!$'.
+
+`!fi:2'
+ designates the second argument of the most recent command starting
+ with the letters `fi'.
+
+ Here are the word designators:
+
+`0 (zero)'
+ The `0'th word. For many applications, this is the command word.
+
+`N'
+ The Nth word.
+
+`^'
+ The first argument; that is, word 1.
+
+`$'
+ The last argument.
+
+`%'
+ The word matched by the most recent `?STRING?' search.
+
+`X-Y'
+ A range of words; `-Y' abbreviates `0-Y'.
+
+`*'
+ All of the words, except the `0'th. This is a synonym for `1-$'.
+ It is not an error to use `*' if there is just one word in the
+ event; the empty string is returned in that case.
+
+`X*'
+ Abbreviates `X-$'
+
+`X-'
+ Abbreviates `X-$' like `X*', but omits the last word.
+
+ If a word designator is supplied without an event specification, the
+previous command is used as the event.
+
+
+File: history.info, Node: Modifiers, Prev: Word Designators, Up: History Interaction
+
+Modifiers
+---------
+
+ After the optional word designator, you can add a sequence of one or
+more of the following modifiers, each preceded by a `:'.
+
+`h'
+ Remove a trailing pathname component, leaving only the head.
+
+`t'
+ Remove all leading pathname components, leaving the tail.
+
+`r'
+ Remove a trailing suffix of the form `.SUFFIX', leaving the
+ basename.
+
+`e'
+ Remove all but the trailing suffix.
+
+`p'
+ Print the new command but do not execute it.
+
+`s/OLD/NEW/'
+ Substitute NEW for the first occurrence of OLD in the event line.
+ Any delimiter may be used in place of `/'. The delimiter may be
+ quoted in OLD and NEW with a single backslash. If `&' appears in
+ NEW, it is replaced by OLD. A single backslash will quote the
+ `&'. The final delimiter is optional if it is the last character
+ on the input line.
+
+`&'
+ Repeat the previous substitution.
+
+`g'
+ Cause changes to be applied over the entire event line. Used in
+ conjunction with `s', as in `gs/OLD/NEW/', or with `&'.
+
+
+File: history.info, Node: Programming with GNU History, Next: Concept Index, Prev: Using History Interactively, Up: Top
+
+Programming with GNU History
+****************************
+
+ This chapter describes how to interface programs that you write with
+the GNU History Library. It should be considered a technical guide.
+For information on the interactive use of GNU History, *note Using
+History Interactively::.
+
+* Menu:
+
+* Introduction to History:: What is the GNU History library for?
+* History Storage:: How information is stored.
+* History Functions:: Functions that you can use.
+* History Variables:: Variables that control behaviour.
+* History Programming Example:: Example of using the GNU History Library.
+
+
+File: history.info, Node: Introduction to History, Next: History Storage, Up: Programming with GNU History
+
+Introduction to History
+=======================
+
+ Many programs read input from the user a line at a time. The GNU
+History library is able to keep track of those lines, associate
+arbitrary data with each line, and utilize information from previous
+lines in composing new ones.
+
+ The programmer using the History library has available functions for
+remembering lines on a history list, associating arbitrary data with a
+line, removing lines from the list, searching through the list for a
+line containing an arbitrary text string, and referencing any line in
+the list directly. In addition, a history "expansion" function is
+available which provides for a consistent user interface across
+different programs.
+
+ The user using programs written with the History library has the
+benefit of a consistent user interface with a set of well-known
+commands for manipulating the text of previous lines and using that text
+in new commands. The basic history manipulation commands are similar to
+the history substitution provided by `csh'.
+
+ If the programmer desires, he can use the Readline library, which
+includes some history manipulation by default, and has the added
+advantage of command line editing.
+
+ Before declaring any functions using any functionality the History
+library provides in other code, an application writer should include
+the file `<readline/history.h>' in any file that uses the History
+library's features. It supplies extern declarations for all of the
+library's public functions and variables, and declares all of the
+public data structures.
+
+
+File: history.info, Node: History Storage, Next: History Functions, Prev: Introduction to History, Up: Programming with GNU History
+
+History Storage
+===============
+
+ The history list is an array of history entries. A history entry is
+declared as follows:
+
+ typedef void *histdata_t;
+
+ typedef struct _hist_entry {
+ char *line;
+ histdata_t data;
+ } HIST_ENTRY;
+
+ The history list itself might therefore be declared as
+
+ HIST_ENTRY **the_history_list;
+
+ The state of the History library is encapsulated into a single
+structure:
+
+ /*
+ * A structure used to pass around the current state of the history.
+ */
+ typedef struct _hist_state {
+ HIST_ENTRY **entries; /* Pointer to the entries themselves. */
+ int offset; /* The location pointer within this array. */
+ int length; /* Number of elements within this array. */
+ int size; /* Number of slots allocated to this array. */
+ int flags;
+ } HISTORY_STATE;
+
+ If the flags member includes `HS_STIFLED', the history has been
+stifled.
+
+
+File: history.info, Node: History Functions, Next: History Variables, Prev: History Storage, Up: Programming with GNU History
+
+History Functions
+=================
+
+ This section describes the calling sequence for the various functions
+exported by the GNU History library.
+
+* Menu:
+
+* Initializing History and State Management:: Functions to call when you
+ want to use history in a
+ program.
+* History List Management:: Functions used to manage the list
+ of history entries.
+* Information About the History List:: Functions returning information about
+ the history list.
+* Moving Around the History List:: Functions used to change the position
+ in the history list.
+* Searching the History List:: Functions to search the history list
+ for entries containing a string.
+* Managing the History File:: Functions that read and write a file
+ containing the history list.
+* History Expansion:: Functions to perform csh-like history
+ expansion.
+
+
+File: history.info, Node: Initializing History and State Management, Next: History List Management, Up: History Functions
+
+Initializing History and State Management
+-----------------------------------------
+
+ This section describes functions used to initialize and manage the
+state of the History library when you want to use the history functions
+in your program.
+
+ - Function: void using_history (void)
+ Begin a session in which the history functions might be used. This
+ initializes the interactive variables.
+
+ - Function: HISTORY_STATE * history_get_history_state (void)
+ Return a structure describing the current state of the input
+ history.
+
+ - Function: void history_set_history_state (HISTORY_STATE *state)
+ Set the state of the history list according to STATE.
+
+
+File: history.info, Node: History List Management, Next: Information About the History List, Prev: Initializing History and State Management, Up: History Functions
+
+History List Management
+-----------------------
+
+ These functions manage individual entries on the history list, or set
+parameters managing the list itself.
+
+ - Function: void add_history (const char *string)
+ Place STRING at the end of the history list. The associated data
+ field (if any) is set to `NULL'.
+
+ - Function: HIST_ENTRY * remove_history (int which)
+ Remove history entry at offset WHICH from the history. The
+ removed element is returned so you can free the line, data, and
+ containing structure.
+
+ - Function: HIST_ENTRY * replace_history_entry (int which, const char
+ *line, histdata_t data)
+ Make the history entry at offset WHICH have LINE and DATA. This
+ returns the old entry so you can dispose of the data. In the case
+ of an invalid WHICH, a `NULL' pointer is returned.
+
+ - Function: void clear_history (void)
+ Clear the history list by deleting all the entries.
+
+ - Function: void stifle_history (int max)
+ Stifle the history list, remembering only the last MAX entries.
+
+ - Function: int unstifle_history (void)
+ Stop stifling the history. This returns the previous amount the
+ history was stifled. The value is positive if the history was
+ stifled, negative if it wasn't.
+
+ - Function: int history_is_stifled (void)
+ Returns non-zero if the history is stifled, zero if it is not.
+
+
+File: history.info, Node: Information About the History List, Next: Moving Around the History List, Prev: History List Management, Up: History Functions
+
+Information About the History List
+----------------------------------
+
+ These functions return information about the entire history list or
+individual list entries.
+
+ - Function: HIST_ENTRY ** history_list (void)
+ Return a `NULL' terminated array of `HIST_ENTRY *' which is the
+ current input history. Element 0 of this list is the beginning of
+ time. If there is no history, return `NULL'.
+
+ - Function: int where_history (void)
+ Returns the offset of the current history element.
+
+ - Function: HIST_ENTRY * current_history (void)
+ Return the history entry at the current position, as determined by
+ `where_history()'. If there is no entry there, return a `NULL'
+ pointer.
+
+ - Function: HIST_ENTRY * history_get (int offset)
+ Return the history entry at position OFFSET, starting from
+ `history_base' (*note History Variables::). If there is no entry
+ there, or if OFFSET is greater than the history length, return a
+ `NULL' pointer.
+
+ - Function: int history_total_bytes (void)
+ Return the number of bytes that the primary history entries are
+ using. This function returns the sum of the lengths of all the
+ lines in the history.
+
+
+File: history.info, Node: Moving Around the History List, Next: Searching the History List, Prev: Information About the History List, Up: History Functions
+
+Moving Around the History List
+------------------------------
+
+ These functions allow the current index into the history list to be
+set or changed.
+
+ - Function: int history_set_pos (int pos)
+ Set the current history offset to POS, an absolute index into the
+ list. Returns 1 on success, 0 if POS is less than zero or greater
+ than the number of history entries.
+
+ - Function: HIST_ENTRY * previous_history (void)
+ Back up the current history offset to the previous history entry,
+ and return a pointer to that entry. If there is no previous
+ entry, return a `NULL' pointer.
+
+ - Function: HIST_ENTRY * next_history (void)
+ Move the current history offset forward to the next history entry,
+ and return the a pointer to that entry. If there is no next
+ entry, return a `NULL' pointer.
+
+
+File: history.info, Node: Searching the History List, Next: Managing the History File, Prev: Moving Around the History List, Up: History Functions
+
+Searching the History List
+--------------------------
+
+ These functions allow searching of the history list for entries
+containing a specific string. Searching may be performed both forward
+and backward from the current history position. The search may be
+"anchored", meaning that the string must match at the beginning of the
+history entry.
+
+ - Function: int history_search (const char *string, int direction)
+ Search the history for STRING, starting at the current history
+ offset. If DIRECTION is less than 0, then the search is through
+ previous entries, otherwise through subsequent entries. If STRING
+ is found, then the current history index is set to that history
+ entry, and the value returned is the offset in the line of the
+ entry where STRING was found. Otherwise, nothing is changed, and
+ a -1 is returned.
+
+ - Function: int history_search_prefix (const char *string, int
+ direction)
+ Search the history for STRING, starting at the current history
+ offset. The search is anchored: matching lines must begin with
+ STRING. If DIRECTION is less than 0, then the search is through
+ previous entries, otherwise through subsequent entries. If STRING
+ is found, then the current history index is set to that entry, and
+ the return value is 0. Otherwise, nothing is changed, and a -1 is
+ returned.
+
+ - Function: int history_search_pos (const char *string, int direction,
+ int pos)
+ Search for STRING in the history list, starting at POS, an
+ absolute index into the list. If DIRECTION is negative, the search
+ proceeds backward from POS, otherwise forward. Returns the
+ absolute index of the history element where STRING was found, or
+ -1 otherwise.
+
+
+File: history.info, Node: Managing the History File, Next: History Expansion, Prev: Searching the History List, Up: History Functions
+
+Managing the History File
+-------------------------
+
+ The History library can read the history from and write it to a file.
+This section documents the functions for managing a history file.
+
+ - Function: int read_history (const char *filename)
+ Add the contents of FILENAME to the history list, a line at a time.
+ If FILENAME is `NULL', then read from `~/.history'. Returns 0 if
+ successful, or `errno' if not.
+
+ - Function: int read_history_range (const char *filename, int from,
+ int to)
+ Read a range of lines from FILENAME, adding them to the history
+ list. Start reading at line FROM and end at TO. If FROM is zero,
+ start at the beginning. If TO is less than FROM, then read until
+ the end of the file. If FILENAME is `NULL', then read from
+ `~/.history'. Returns 0 if successful, or `errno' if not.
+
+ - Function: int write_history (const char *filename)
+ Write the current history to FILENAME, overwriting FILENAME if
+ necessary. If FILENAME is `NULL', then write the history list to
+ `~/.history'. Returns 0 on success, or `errno' on a read or write
+ error.
+
+ - Function: int append_history (int nelements, const char *filename)
+ Append the last NELEMENTS of the history list to FILENAME. If
+ FILENAME is `NULL', then append to `~/.history'. Returns 0 on
+ success, or `errno' on a read or write error.
+
+ - Function: int history_truncate_file (const char *filename, int
+ nlines)
+ Truncate the history file FILENAME, leaving only the last NLINES
+ lines. If FILENAME is `NULL', then `~/.history' is truncated.
+ Returns 0 on success, or `errno' on failure.
+
+
+File: history.info, Node: History Expansion, Prev: Managing the History File, Up: History Functions
+
+History Expansion
+-----------------
+
+ These functions implement history expansion.
+
+ - Function: int history_expand (char *string, char **output)
+ Expand STRING, placing the result into OUTPUT, a pointer to a
+ string (*note History Interaction::). Returns:
+ `0'
+ If no expansions took place (or, if the only change in the
+ text was the removal of escape characters preceding the
+ history expansion character);
+
+ `1'
+ if expansions did take place;
+
+ `-1'
+ if there was an error in expansion;
+
+ `2'
+ if the returned line should be displayed, but not executed,
+ as with the `:p' modifier (*note Modifiers::).
+
+ If an error ocurred in expansion, then OUTPUT contains a
+ descriptive error message.
+
+ - Function: char * get_history_event (const char *string, int *cindex,
+ int qchar)
+ Returns the text of the history event beginning at STRING +
+ *CINDEX. *CINDEX is modified to point to after the event
+ specifier. At function entry, CINDEX points to the index into
+ STRING where the history event specification begins. QCHAR is a
+ character that is allowed to end the event specification in
+ addition to the "normal" terminating characters.
+
+ - Function: char ** history_tokenize (const char *string)
+ Return an array of tokens parsed out of STRING, much as the shell
+ might. The tokens are split on the characters in the
+ HISTORY_WORD_DELIMITERS variable, and shell quoting conventions
+ are obeyed.
+
+ - Function: char * history_arg_extract (int first, int last, const
+ char *string)
+ Extract a string segment consisting of the FIRST through LAST
+ arguments present in STRING. Arguments are split using
+ `history_tokenize'.
+
+
+File: history.info, Node: History Variables, Next: History Programming Example, Prev: History Functions, Up: Programming with GNU History
+
+History Variables
+=================
+
+ This section describes the externally-visible variables exported by
+the GNU History Library.
+
+ - Variable: int history_base
+ The logical offset of the first entry in the history list.
+
+ - Variable: int history_length
+ The number of entries currently stored in the history list.
+
+ - Variable: int history_max_entries
+ The maximum number of history entries. This must be changed using
+ `stifle_history()'.
+
+ - Variable: char history_expansion_char
+ The character that introduces a history event. The default is `!'.
+ Setting this to 0 inhibits history expansion.
+
+ - Variable: char history_subst_char
+ The character that invokes word substitution if found at the start
+ of a line. The default is `^'.
+
+ - Variable: char history_comment_char
+ During tokenization, if this character is seen as the first
+ character of a word, then it and all subsequent characters up to a
+ newline are ignored, suppressing history expansion for the
+ remainder of the line. This is disabled by default.
+
+ - Variable: char * history_word_delimiters
+ The characters that separate tokens for \fBhistory_tokenize()\fP.
+ The default value is `" \t\n()<>;&|"'.
+
+ - Variable: char * history_no_expand_chars
+ The list of characters which inhibit history expansion if found
+ immediately following HISTORY_EXPANSION_CHAR. The default is
+ space, tab, newline, carriage return, and `='.
+
+ - Variable: char * history_search_delimiter_chars
+ The list of additional characters which can delimit a history
+ search string, in addition to space, TAB, `:' and `?' in the case
+ of a substring search. The default is empty.
+
+ - Variable: int history_quotes_inhibit_expansion
+ If non-zero, single-quoted words are not scanned for the history
+ expansion character. The default value is 0.
+
+ - Variable: rl_linebuf_func_t * history_inhibit_expansion_function
+ This should be set to the address of a function that takes two
+ arguments: a `char *' (STRING) and an `int' index into that string
+ (I). It should return a non-zero value if the history expansion
+ starting at STRING[I] should not be performed; zero if the
+ expansion should be done. It is intended for use by applications
+ like Bash that use the history expansion character for additional
+ purposes. By default, this variable is set to `NULL'.
+
+
+File: history.info, Node: History Programming Example, Prev: History Variables, Up: Programming with GNU History
+
+History Programming Example
+===========================
+
+ The following program demonstrates simple use of the GNU History
+Library.
+
+ #include <stdio.h>
+ #include <readline/history.h>
+
+ main (argc, argv)
+ int argc;
+ char **argv;
+ {
+ char line[1024], *t;
+ int len, done = 0;
+
+ line[0] = 0;
+
+ using_history ();
+ while (!done)
+ {
+ printf ("history$ ");
+ fflush (stdout);
+ t = fgets (line, sizeof (line) - 1, stdin);
+ if (t && *t)
+ {
+ len = strlen (t);
+ if (t[len - 1] == '\n')
+ t[len - 1] = '\0';
+ }
+
+ if (!t)
+ strcpy (line, "quit");
+
+ if (line[0])
+ {
+ char *expansion;
+ int result;
+
+ result = history_expand (line, &expansion);
+ if (result)
+ fprintf (stderr, "%s\n", expansion);
+
+ if (result < 0 || result == 2)
+ {
+ free (expansion);
+ continue;
+ }
+
+ add_history (expansion);
+ strncpy (line, expansion, sizeof (line) - 1);
+ free (expansion);
+ }
+
+ if (strcmp (line, "quit") == 0)
+ done = 1;
+ else if (strcmp (line, "save") == 0)
+ write_history ("history_file");
+ else if (strcmp (line, "read") == 0)
+ read_history ("history_file");
+ else if (strcmp (line, "list") == 0)
+ {
+ register HIST_ENTRY **the_list;
+ register int i;
+
+ the_list = history_list ();
+ if (the_list)
+ for (i = 0; the_list[i]; i++)
+ printf ("%d: %s\n", i + history_base, the_list[i]->line);
+ }
+ else if (strncmp (line, "delete", 6) == 0)
+ {
+ int which;
+ if ((sscanf (line + 6, "%d", &which)) == 1)
+ {
+ HIST_ENTRY *entry = remove_history (which);
+ if (!entry)
+ fprintf (stderr, "No such entry %d\n", which);
+ else
+ {
+ free (entry->line);
+ free (entry);
+ }
+ }
+ else
+ {
+ fprintf (stderr, "non-numeric arg given to `delete'\n");
+ }
+ }
+ }
+ }
+
+
+File: history.info, Node: Concept Index, Next: Function and Variable Index, Prev: Programming with GNU History, Up: Top
+
+Concept Index
+*************
+
+* Menu:
+
+* anchored search: Searching the History List.
+* event designators: Event Designators.
+* history events: Event Designators.
+* history expansion: History Interaction.
+* History Searching: Searching the History List.
+
+
+File: history.info, Node: Function and Variable Index, Prev: Concept Index, Up: Top
+
+Function and Variable Index
+***************************
+
+* Menu:
+
+* add_history: History List Management.
+* append_history: Managing the History File.
+* clear_history: History List Management.
+* current_history: Information About the History List.
+* get_history_event: History Expansion.
+* history_arg_extract: History Expansion.
+* history_base: History Variables.
+* history_comment_char: History Variables.
+* history_expand: History Expansion.
+* history_expansion_char: History Variables.
+* history_get: Information About the History List.
+* history_get_history_state: Initializing History and State Management.
+* history_inhibit_expansion_function: History Variables.
+* history_is_stifled: History List Management.
+* history_length: History Variables.
+* history_list: Information About the History List.
+* history_max_entries: History Variables.
+* history_no_expand_chars: History Variables.
+* history_quotes_inhibit_expansion: History Variables.
+* history_search: Searching the History List.
+* history_search_delimiter_chars: History Variables.
+* history_search_pos: Searching the History List.
+* history_search_prefix: Searching the History List.
+* history_set_history_state: Initializing History and State Management.
+* history_set_pos: Moving Around the History List.
+* history_subst_char: History Variables.
+* history_tokenize: History Expansion.
+* history_total_bytes: Information About the History List.
+* history_truncate_file: Managing the History File.
+* history_word_delimiters: History Variables.
+* next_history: Moving Around the History List.
+* previous_history: Moving Around the History List.
+* read_history: Managing the History File.
+* read_history_range: Managing the History File.
+* remove_history: History List Management.
+* replace_history_entry: History List Management.
+* stifle_history: History List Management.
+* unstifle_history: History List Management.
+* using_history: Initializing History and State Management.
+* where_history: Information About the History List.
+* write_history: Managing the History File.
+
+
+
+Tag Table:
+Node: Top1136
+Node: Using History Interactively1716
+Node: History Interaction2223
+Node: Event Designators3642
+Node: Word Designators4569
+Node: Modifiers6198
+Node: Programming with GNU History7336
+Node: Introduction to History8061
+Node: History Storage9746
+Node: History Functions10857
+Node: Initializing History and State Management11841
+Node: History List Management12641
+Node: Information About the History List14191
+Node: Moving Around the History List15547
+Node: Searching the History List16536
+Node: Managing the History File18454
+Node: History Expansion20260
+Node: History Variables22155
+Node: History Programming Example24725
+Node: Concept Index27447
+Node: Function and Variable Index27933
+
+End Tag Table
diff --git a/readline-4.2/doc/history.ps b/readline-4.2/doc/history.ps
new file mode 100644
index 0000000..4532736
--- /dev/null
+++ b/readline-4.2/doc/history.ps
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+%%EOF
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+<HTML>
+<HEAD>
+<!-- This HTML file has been created by texi2html 1.52
+ from /usr/homes/chet/src/bash/readline-src/doc/rlman.texinfo on 16 April 2001 -->
+
+<TITLE>GNU Readline Library</TITLE>
+</HEAD>
+<BODY>
+<H1>GNU Readline Library</H1>
+<H2>Edition 4.2, for <CODE>Readline Library</CODE> Version 4.2.</H2>
+<H2>Apr 2001</H2>
+<ADDRESS>Brian Fox, Free Software Foundation</ADDRESS>
+<ADDRESS>Chet Ramey, Case Western Reserve University</ADDRESS>
+<P>
+<P><HR><P>
+<H1>Table of Contents</H1>
+<UL>
+<LI><A NAME="TOC1" HREF="readline.html#SEC1">Command Line Editing</A>
+<UL>
+<LI><A NAME="TOC2" HREF="readline.html#SEC2">Introduction to Line Editing</A>
+<LI><A NAME="TOC3" HREF="readline.html#SEC3">Readline Interaction</A>
+<UL>
+<LI><A NAME="TOC4" HREF="readline.html#SEC4">Readline Bare Essentials</A>
+<LI><A NAME="TOC5" HREF="readline.html#SEC5">Readline Movement Commands</A>
+<LI><A NAME="TOC6" HREF="readline.html#SEC6">Readline Killing Commands</A>
+<LI><A NAME="TOC7" HREF="readline.html#SEC7">Readline Arguments</A>
+<LI><A NAME="TOC8" HREF="readline.html#SEC8">Searching for Commands in the History</A>
+</UL>
+<LI><A NAME="TOC9" HREF="readline.html#SEC9">Readline Init File</A>
+<UL>
+<LI><A NAME="TOC10" HREF="readline.html#SEC10">Readline Init File Syntax</A>
+<LI><A NAME="TOC11" HREF="readline.html#SEC11">Conditional Init Constructs</A>
+<LI><A NAME="TOC12" HREF="readline.html#SEC12">Sample Init File</A>
+</UL>
+<LI><A NAME="TOC13" HREF="readline.html#SEC13">Bindable Readline Commands</A>
+<UL>
+<LI><A NAME="TOC14" HREF="readline.html#SEC14">Commands For Moving</A>
+<LI><A NAME="TOC15" HREF="readline.html#SEC15">Commands For Manipulating The History</A>
+<LI><A NAME="TOC16" HREF="readline.html#SEC16">Commands For Changing Text</A>
+<LI><A NAME="TOC17" HREF="readline.html#SEC17">Killing And Yanking</A>
+<LI><A NAME="TOC18" HREF="readline.html#SEC18">Specifying Numeric Arguments</A>
+<LI><A NAME="TOC19" HREF="readline.html#SEC19">Letting Readline Type For You</A>
+<LI><A NAME="TOC20" HREF="readline.html#SEC20">Keyboard Macros</A>
+<LI><A NAME="TOC21" HREF="readline.html#SEC21">Some Miscellaneous Commands</A>
+</UL>
+<LI><A NAME="TOC22" HREF="readline.html#SEC22">Readline vi Mode</A>
+</UL>
+<LI><A NAME="TOC23" HREF="readline.html#SEC23">Programming with GNU Readline</A>
+<UL>
+<LI><A NAME="TOC24" HREF="readline.html#SEC24">Basic Behavior</A>
+<LI><A NAME="TOC25" HREF="readline.html#SEC25">Custom Functions</A>
+<UL>
+<LI><A NAME="TOC26" HREF="readline.html#SEC26">Readline Typedefs</A>
+<LI><A NAME="TOC27" HREF="readline.html#SEC27">Writing a New Function</A>
+</UL>
+<LI><A NAME="TOC28" HREF="readline.html#SEC28">Readline Variables</A>
+<LI><A NAME="TOC29" HREF="readline.html#SEC29">Readline Convenience Functions</A>
+<UL>
+<LI><A NAME="TOC30" HREF="readline.html#SEC30">Naming a Function</A>
+<LI><A NAME="TOC31" HREF="readline.html#SEC31">Selecting a Keymap</A>
+<LI><A NAME="TOC32" HREF="readline.html#SEC32">Binding Keys</A>
+<LI><A NAME="TOC33" HREF="readline.html#SEC33">Associating Function Names and Bindings</A>
+<LI><A NAME="TOC34" HREF="readline.html#SEC34">Allowing Undoing</A>
+<LI><A NAME="TOC35" HREF="readline.html#SEC35">Redisplay</A>
+<LI><A NAME="TOC36" HREF="readline.html#SEC36">Modifying Text</A>
+<LI><A NAME="TOC37" HREF="readline.html#SEC37">Character Input</A>
+<LI><A NAME="TOC38" HREF="readline.html#SEC38">Terminal Management</A>
+<LI><A NAME="TOC39" HREF="readline.html#SEC39">Utility Functions</A>
+<LI><A NAME="TOC40" HREF="readline.html#SEC40">Miscellaneous Functions</A>
+<LI><A NAME="TOC41" HREF="readline.html#SEC41">Alternate Interface</A>
+<LI><A NAME="TOC42" HREF="readline.html#SEC42">A Readline Example</A>
+</UL>
+<LI><A NAME="TOC43" HREF="readline.html#SEC43">Readline Signal Handling</A>
+<LI><A NAME="TOC44" HREF="readline.html#SEC44">Custom Completers</A>
+<UL>
+<LI><A NAME="TOC45" HREF="readline.html#SEC45">How Completing Works</A>
+<LI><A NAME="TOC46" HREF="readline.html#SEC46">Completion Functions</A>
+<LI><A NAME="TOC47" HREF="readline.html#SEC47">Completion Variables</A>
+<LI><A NAME="TOC48" HREF="readline.html#SEC48">A Short Completion Example</A>
+</UL>
+</UL>
+<LI><A NAME="TOC49" HREF="readline.html#SEC49">Concept Index</A>
+<LI><A NAME="TOC50" HREF="readline.html#SEC50">Function and Variable Index</A>
+</UL>
+<P><HR><P>
+
+<P>
+This document describes the GNU Readline Library, a utility which aids
+in the consistency of user interface across discrete programs that need
+to provide a command line interface.
+
+</P>
+<P>
+Published by the Free Software Foundation <BR>
+59 Temple Place, Suite 330, <BR>
+Boston, MA 02111 USA
+
+</P>
+<P>
+Permission is granted to make and distribute verbatim copies of
+this manual provided the copyright notice and this permission notice
+are preserved on all copies.
+
+</P>
+<P>
+Permission is granted to copy and distribute modified versions of this
+manual under the conditions for verbatim copying, provided that the entire
+resulting derived work is distributed under the terms of a permission
+notice identical to this one.
+
+</P>
+<P>
+Permission is granted to copy and distribute translations of this manual
+into another language, under the above conditions for modified versions,
+except that this permission notice may be stated in a translation approved
+by the Free Software Foundation.
+
+</P>
+<P>
+Copyright (C) 1988-2001 Free Software Foundation, Inc.
+
+</P>
+
+
+
+<H1><A NAME="SEC1" HREF="readline.html#TOC1">Command Line Editing</A></H1>
+
+<P>
+This chapter describes the basic features of the GNU
+command line editing interface.
+
+</P>
+
+<UL>
+<LI><A HREF="readline.html#SEC2">Introduction and Notation</A>: Notation used in this text.
+<LI><A HREF="readline.html#SEC3">Readline Interaction</A>: The minimum set of commands for editing a line.
+<LI><A HREF="readline.html#SEC9">Readline Init File</A>: Customizing Readline from a user's view.
+<LI><A HREF="readline.html#SEC13">Bindable Readline Commands</A>: A description of most of the Readline commands
+ available for binding
+<LI><A HREF="readline.html#SEC22">Readline vi Mode</A>: A short description of how to make Readline
+ behave like the vi editor.
+</UL>
+
+
+
+<H2><A NAME="SEC2" HREF="readline.html#TOC2">Introduction to Line Editing</A></H2>
+
+<P>
+The following paragraphs describe the notation used to represent
+keystrokes.
+
+</P>
+<P>
+The text <KBD>C-k</KBD> is read as `Control-K' and describes the character
+produced when the <KBD>k</KBD> key is pressed while the Control key
+is depressed.
+
+</P>
+<P>
+The text <KBD>M-k</KBD> is read as `Meta-K' and describes the character
+produced when the Meta key (if you have one) is depressed, and the <KBD>k</KBD>
+key is pressed.
+The Meta key is labeled <KBD>ALT</KBD> on many keyboards.
+On keyboards with two keys labeled <KBD>ALT</KBD> (usually to either side of
+the space bar), the <KBD>ALT</KBD> on the left side is generally set to
+work as a Meta key.
+The <KBD>ALT</KBD> key on the right may also be configured to work as a
+Meta key or may be configured as some other modifier, such as a
+Compose key for typing accented characters.
+
+</P>
+<P>
+If you do not have a Meta or <KBD>ALT</KBD> key, or another key working as
+a Meta key, the identical keystroke can be generated by typing <KBD>ESC</KBD>
+<EM>first</EM>, and then typing <KBD>k</KBD>.
+Either process is known as <EM>metafying</EM> the <KBD>k</KBD> key.
+
+</P>
+<P>
+The text <KBD>M-C-k</KBD> is read as `Meta-Control-k' and describes the
+character produced by <EM>metafying</EM> <KBD>C-k</KBD>.
+
+</P>
+<P>
+In addition, several keys have their own names. Specifically,
+<KBD>DEL</KBD>, <KBD>ESC</KBD>, <KBD>LFD</KBD>, <KBD>SPC</KBD>, <KBD>RET</KBD>, and <KBD>TAB</KBD> all
+stand for themselves when seen in this text, or in an init file
+(see section <A HREF="readline.html#SEC9">Readline Init File</A>).
+If your keyboard lacks a <KBD>LFD</KBD> key, typing <KBD>C-j</KBD> will
+produce the desired character.
+The <KBD>RET</KBD> key may be labeled <KBD>Return</KBD> or <KBD>Enter</KBD> on
+some keyboards.
+
+</P>
+
+
+<H2><A NAME="SEC3" HREF="readline.html#TOC3">Readline Interaction</A></H2>
+<P>
+<A NAME="IDX1"></A>
+
+</P>
+<P>
+Often during an interactive session you type in a long line of text,
+only to notice that the first word on the line is misspelled. The
+Readline library gives you a set of commands for manipulating the text
+as you type it in, allowing you to just fix your typo, and not forcing
+you to retype the majority of the line. Using these editing commands,
+you move the cursor to the place that needs correction, and delete or
+insert the text of the corrections. Then, when you are satisfied with
+the line, you simply press <KBD>RET</KBD>. You do not have to be at the
+end of the line to press <KBD>RET</KBD>; the entire line is accepted
+regardless of the location of the cursor within the line.
+
+</P>
+
+<UL>
+<LI><A HREF="readline.html#SEC4">Readline Bare Essentials</A>: The least you need to know about Readline.
+<LI><A HREF="readline.html#SEC5">Readline Movement Commands</A>: Moving about the input line.
+<LI><A HREF="readline.html#SEC6">Readline Killing Commands</A>: How to delete text, and how to get it back!
+<LI><A HREF="readline.html#SEC7">Readline Arguments</A>: Giving numeric arguments to commands.
+<LI><A HREF="readline.html#SEC8">Searching</A>: Searching through previous lines.
+</UL>
+
+
+
+<H3><A NAME="SEC4" HREF="readline.html#TOC4">Readline Bare Essentials</A></H3>
+<P>
+<A NAME="IDX2"></A>
+<A NAME="IDX3"></A>
+<A NAME="IDX4"></A>
+
+</P>
+<P>
+In order to enter characters into the line, simply type them. The typed
+character appears where the cursor was, and then the cursor moves one
+space to the right. If you mistype a character, you can use your
+erase character to back up and delete the mistyped character.
+
+</P>
+<P>
+Sometimes you may mistype a character, and
+not notice the error until you have typed several other characters. In
+that case, you can type <KBD>C-b</KBD> to move the cursor to the left, and then
+correct your mistake. Afterwards, you can move the cursor to the right
+with <KBD>C-f</KBD>.
+
+</P>
+<P>
+When you add text in the middle of a line, you will notice that characters
+to the right of the cursor are `pushed over' to make room for the text
+that you have inserted. Likewise, when you delete text behind the cursor,
+characters to the right of the cursor are `pulled back' to fill in the
+blank space created by the removal of the text. A list of the bare
+essentials for editing the text of an input line follows.
+
+</P>
+<DL COMPACT>
+
+<DT><KBD>C-b</KBD>
+<DD>
+Move back one character.
+<DT><KBD>C-f</KBD>
+<DD>
+Move forward one character.
+<DT><KBD>DEL</KBD> or <KBD>Backspace</KBD>
+<DD>
+Delete the character to the left of the cursor.
+<DT><KBD>C-d</KBD>
+<DD>
+Delete the character underneath the cursor.
+<DT>Printing characters
+<DD>
+Insert the character into the line at the cursor.
+<DT><KBD>C-_</KBD> or <KBD>C-x C-u</KBD>
+<DD>
+Undo the last editing command. You can undo all the way back to an
+empty line.
+</DL>
+
+<P>
+(Depending on your configuration, the <KBD>Backspace</KBD> key be set to
+delete the character to the left of the cursor and the <KBD>DEL</KBD> key set
+to delete the character underneath the cursor, like <KBD>C-d</KBD>, rather
+than the character to the left of the cursor.)
+
+</P>
+
+
+<H3><A NAME="SEC5" HREF="readline.html#TOC5">Readline Movement Commands</A></H3>
+
+<P>
+The above table describes the most basic keystrokes that you need
+in order to do editing of the input line. For your convenience, many
+other commands have been added in addition to <KBD>C-b</KBD>, <KBD>C-f</KBD>,
+<KBD>C-d</KBD>, and <KBD>DEL</KBD>. Here are some commands for moving more rapidly
+about the line.
+
+</P>
+<DL COMPACT>
+
+<DT><KBD>C-a</KBD>
+<DD>
+Move to the start of the line.
+<DT><KBD>C-e</KBD>
+<DD>
+Move to the end of the line.
+<DT><KBD>M-f</KBD>
+<DD>
+Move forward a word, where a word is composed of letters and digits.
+<DT><KBD>M-b</KBD>
+<DD>
+Move backward a word.
+<DT><KBD>C-l</KBD>
+<DD>
+Clear the screen, reprinting the current line at the top.
+</DL>
+
+<P>
+Notice how <KBD>C-f</KBD> moves forward a character, while <KBD>M-f</KBD> moves
+forward a word. It is a loose convention that control keystrokes
+operate on characters while meta keystrokes operate on words.
+
+</P>
+
+
+<H3><A NAME="SEC6" HREF="readline.html#TOC6">Readline Killing Commands</A></H3>
+
+<P>
+<A NAME="IDX5"></A>
+<A NAME="IDX6"></A>
+
+</P>
+<P>
+<EM>Killing</EM> text means to delete the text from the line, but to save
+it away for later use, usually by <EM>yanking</EM> (re-inserting)
+it back into the line.
+(`Cut' and `paste' are more recent jargon for `kill' and `yank'.)
+
+</P>
+<P>
+If the description for a command says that it `kills' text, then you can
+be sure that you can get the text back in a different (or the same)
+place later.
+
+</P>
+<P>
+When you use a kill command, the text is saved in a <EM>kill-ring</EM>.
+Any number of consecutive kills save all of the killed text together, so
+that when you yank it back, you get it all. The kill
+ring is not line specific; the text that you killed on a previously
+typed line is available to be yanked back later, when you are typing
+another line.
+<A NAME="IDX7"></A>
+
+</P>
+<P>
+Here is the list of commands for killing text.
+
+</P>
+<DL COMPACT>
+
+<DT><KBD>C-k</KBD>
+<DD>
+Kill the text from the current cursor position to the end of the line.
+
+<DT><KBD>M-d</KBD>
+<DD>
+Kill from the cursor to the end of the current word, or, if between
+words, to the end of the next word.
+Word boundaries are the same as those used by <KBD>M-f</KBD>.
+
+<DT><KBD>M-<KBD>DEL</KBD></KBD>
+<DD>
+Kill from the cursor the start of the previous word, or, if between
+words, to the start of the previous word.
+Word boundaries are the same as those used by <KBD>M-b</KBD>.
+
+<DT><KBD>C-w</KBD>
+<DD>
+Kill from the cursor to the previous whitespace. This is different than
+<KBD>M-<KBD>DEL</KBD></KBD> because the word boundaries differ.
+
+</DL>
+
+<P>
+Here is how to <EM>yank</EM> the text back into the line. Yanking
+means to copy the most-recently-killed text from the kill buffer.
+
+</P>
+<DL COMPACT>
+
+<DT><KBD>C-y</KBD>
+<DD>
+Yank the most recently killed text back into the buffer at the cursor.
+
+<DT><KBD>M-y</KBD>
+<DD>
+Rotate the kill-ring, and yank the new top. You can only do this if
+the prior command is <KBD>C-y</KBD> or <KBD>M-y</KBD>.
+</DL>
+
+
+
+<H3><A NAME="SEC7" HREF="readline.html#TOC7">Readline Arguments</A></H3>
+
+<P>
+You can pass numeric arguments to Readline commands. Sometimes the
+argument acts as a repeat count, other times it is the <I>sign</I> of the
+argument that is significant. If you pass a negative argument to a
+command which normally acts in a forward direction, that command will
+act in a backward direction. For example, to kill text back to the
+start of the line, you might type <SAMP>`M-- C-k'</SAMP>.
+
+</P>
+<P>
+The general way to pass numeric arguments to a command is to type meta
+digits before the command. If the first `digit' typed is a minus
+sign (<SAMP>`-'</SAMP>), then the sign of the argument will be negative. Once
+you have typed one meta digit to get the argument started, you can type
+the remainder of the digits, and then the command. For example, to give
+the <KBD>C-d</KBD> command an argument of 10, you could type <SAMP>`M-1 0 C-d'</SAMP>,
+which will delete the next ten characters on the input line.
+
+</P>
+
+
+<H3><A NAME="SEC8" HREF="readline.html#TOC8">Searching for Commands in the History</A></H3>
+
+<P>
+Readline provides commands for searching through the command history
+for lines containing a specified string.
+There are two search modes: <EM>incremental</EM> and <EM>non-incremental</EM>.
+
+</P>
+<P>
+Incremental searches begin before the user has finished typing the
+search string.
+As each character of the search string is typed, Readline displays
+the next entry from the history matching the string typed so far.
+An incremental search requires only as many characters as needed to
+find the desired history entry.
+To search backward in the history for a particular string, type
+<KBD>C-r</KBD>. Typing <KBD>C-s</KBD> searches forward through the history.
+The characters present in the value of the <CODE>isearch-terminators</CODE> variable
+are used to terminate an incremental search.
+If that variable has not been assigned a value, the <KBD>ESC</KBD> and
+<KBD>C-J</KBD> characters will terminate an incremental search.
+<KBD>C-g</KBD> will abort an incremental search and restore the original line.
+When the search is terminated, the history entry containing the
+search string becomes the current line.
+
+</P>
+<P>
+To find other matching entries in the history list, type <KBD>C-r</KBD> or
+<KBD>C-s</KBD> as appropriate.
+This will search backward or forward in the history for the next
+entry matching the search string typed so far.
+Any other key sequence bound to a Readline command will terminate
+the search and execute that command.
+For instance, a <KBD>RET</KBD> will terminate the search and accept
+the line, thereby executing the command from the history list.
+A movement command will terminate the search, make the last line found
+the current line, and begin editing.
+
+</P>
+<P>
+Non-incremental searches read the entire search string before starting
+to search for matching history lines. The search string may be
+typed by the user or be part of the contents of the current line.
+
+</P>
+
+
+<H2><A NAME="SEC9" HREF="readline.html#TOC9">Readline Init File</A></H2>
+<P>
+<A NAME="IDX8"></A>
+
+</P>
+<P>
+Although the Readline library comes with a set of Emacs-like
+keybindings installed by default, it is possible to use a different set
+of keybindings.
+Any user can customize programs that use Readline by putting
+commands in an <EM>inputrc</EM> file, conventionally in his home directory.
+The name of this
+file is taken from the value of the environment variable @env{INPUTRC}. If
+that variable is unset, the default is <TT>`~/.inputrc'</TT>.
+
+</P>
+<P>
+When a program which uses the Readline library starts up, the
+init file is read, and the key bindings are set.
+
+</P>
+<P>
+In addition, the <CODE>C-x C-r</CODE> command re-reads this init file, thus
+incorporating any changes that you might have made to it.
+
+</P>
+
+<UL>
+<LI><A HREF="readline.html#SEC10">Readline Init File Syntax</A>: Syntax for the commands in the inputrc file.
+
+<LI><A HREF="readline.html#SEC11">Conditional Init Constructs</A>: Conditional key bindings in the inputrc file.
+
+<LI><A HREF="readline.html#SEC12">Sample Init File</A>: An example inputrc file.
+</UL>
+
+
+
+<H3><A NAME="SEC10" HREF="readline.html#TOC10">Readline Init File Syntax</A></H3>
+
+<P>
+There are only a few basic constructs allowed in the
+Readline init file. Blank lines are ignored.
+Lines beginning with a <SAMP>`#'</SAMP> are comments.
+Lines beginning with a <SAMP>`$'</SAMP> indicate conditional
+constructs (see section <A HREF="readline.html#SEC11">Conditional Init Constructs</A>). Other lines
+denote variable settings and key bindings.
+
+</P>
+<DL COMPACT>
+
+<DT>Variable Settings
+<DD>
+You can modify the run-time behavior of Readline by
+altering the values of variables in Readline
+using the <CODE>set</CODE> command within the init file.
+The syntax is simple:
+
+
+<PRE>
+set <VAR>variable</VAR> <VAR>value</VAR>
+</PRE>
+
+Here, for example, is how to
+change from the default Emacs-like key binding to use
+<CODE>vi</CODE> line editing commands:
+
+
+<PRE>
+set editing-mode vi
+</PRE>
+
+Variable names and values, where appropriate, are recognized without regard
+to case.
+
+A great deal of run-time behavior is changeable with the following
+variables.
+
+<A NAME="IDX9"></A>
+<DL COMPACT>
+
+<DT><CODE>bell-style</CODE>
+<DD>
+<A NAME="IDX10"></A>
+Controls what happens when Readline wants to ring the terminal bell.
+If set to <SAMP>`none'</SAMP>, Readline never rings the bell. If set to
+<SAMP>`visible'</SAMP>, Readline uses a visible bell if one is available.
+If set to <SAMP>`audible'</SAMP> (the default), Readline attempts to ring
+the terminal's bell.
+
+<DT><CODE>comment-begin</CODE>
+<DD>
+<A NAME="IDX11"></A>
+The string to insert at the beginning of the line when the
+<CODE>insert-comment</CODE> command is executed. The default value
+is <CODE>"#"</CODE>.
+
+<DT><CODE>completion-ignore-case</CODE>
+<DD>
+If set to <SAMP>`on'</SAMP>, Readline performs filename matching and completion
+in a case-insensitive fashion.
+The default value is <SAMP>`off'</SAMP>.
+
+<DT><CODE>completion-query-items</CODE>
+<DD>
+<A NAME="IDX12"></A>
+The number of possible completions that determines when the user is
+asked whether he wants to see the list of possibilities. If the
+number of possible completions is greater than this value,
+Readline will ask the user whether or not he wishes to view
+them; otherwise, they are simply listed.
+This variable must be set to an integer value greater than or equal to 0.
+The default limit is <CODE>100</CODE>.
+
+<DT><CODE>convert-meta</CODE>
+<DD>
+<A NAME="IDX13"></A>
+If set to <SAMP>`on'</SAMP>, Readline will convert characters with the
+eighth bit set to an ASCII key sequence by stripping the eighth
+bit and prefixing an <KBD>ESC</KBD> character, converting them to a
+meta-prefixed key sequence. The default value is <SAMP>`on'</SAMP>.
+
+<DT><CODE>disable-completion</CODE>
+<DD>
+<A NAME="IDX14"></A>
+If set to <SAMP>`On'</SAMP>, Readline will inhibit word completion.
+Completion characters will be inserted into the line as if they had
+been mapped to <CODE>self-insert</CODE>. The default is <SAMP>`off'</SAMP>.
+
+<DT><CODE>editing-mode</CODE>
+<DD>
+<A NAME="IDX15"></A>
+The <CODE>editing-mode</CODE> variable controls which default set of
+key bindings is used. By default, Readline starts up in Emacs editing
+mode, where the keystrokes are most similar to Emacs. This variable can be
+set to either <SAMP>`emacs'</SAMP> or <SAMP>`vi'</SAMP>.
+
+<DT><CODE>enable-keypad</CODE>
+<DD>
+<A NAME="IDX16"></A>
+When set to <SAMP>`on'</SAMP>, Readline will try to enable the application
+keypad when it is called. Some systems need this to enable the
+arrow keys. The default is <SAMP>`off'</SAMP>.
+
+<DT><CODE>expand-tilde</CODE>
+<DD>
+<A NAME="IDX17"></A>
+If set to <SAMP>`on'</SAMP>, tilde expansion is performed when Readline
+attempts word completion. The default is <SAMP>`off'</SAMP>.
+
+<DT><CODE>horizontal-scroll-mode</CODE>
+<DD>
+<A NAME="IDX18"></A>
+This variable can be set to either <SAMP>`on'</SAMP> or <SAMP>`off'</SAMP>. Setting it
+to <SAMP>`on'</SAMP> means that the text of the lines being edited will scroll
+horizontally on a single screen line when they are longer than the width
+of the screen, instead of wrapping onto a new screen line. By default,
+this variable is set to <SAMP>`off'</SAMP>.
+
+<DT><CODE>input-meta</CODE>
+<DD>
+<A NAME="IDX19"></A>
+<A NAME="IDX20"></A>
+If set to <SAMP>`on'</SAMP>, Readline will enable eight-bit input (it
+will not clear the eighth bit in the characters it reads),
+regardless of what the terminal claims it can support. The
+default value is <SAMP>`off'</SAMP>. The name <CODE>meta-flag</CODE> is a
+synonym for this variable.
+
+<DT><CODE>isearch-terminators</CODE>
+<DD>
+<A NAME="IDX21"></A>
+The string of characters that should terminate an incremental search without
+subsequently executing the character as a command (see section <A HREF="readline.html#SEC8">Searching for Commands in the History</A>).
+If this variable has not been given a value, the characters <KBD>ESC</KBD> and
+<KBD>C-J</KBD> will terminate an incremental search.
+
+<DT><CODE>keymap</CODE>
+<DD>
+<A NAME="IDX22"></A>
+Sets Readline's idea of the current keymap for key binding commands.
+Acceptable <CODE>keymap</CODE> names are
+<CODE>emacs</CODE>,
+<CODE>emacs-standard</CODE>,
+<CODE>emacs-meta</CODE>,
+<CODE>emacs-ctlx</CODE>,
+<CODE>vi</CODE>,
+<CODE>vi-move</CODE>,
+<CODE>vi-command</CODE>, and
+<CODE>vi-insert</CODE>.
+<CODE>vi</CODE> is equivalent to <CODE>vi-command</CODE>; <CODE>emacs</CODE> is
+equivalent to <CODE>emacs-standard</CODE>. The default value is <CODE>emacs</CODE>.
+The value of the <CODE>editing-mode</CODE> variable also affects the
+default keymap.
+
+<DT><CODE>mark-directories</CODE>
+<DD>
+If set to <SAMP>`on'</SAMP>, completed directory names have a slash
+appended. The default is <SAMP>`on'</SAMP>.
+
+<DT><CODE>mark-modified-lines</CODE>
+<DD>
+<A NAME="IDX23"></A>
+This variable, when set to <SAMP>`on'</SAMP>, causes Readline to display an
+asterisk (<SAMP>`*'</SAMP>) at the start of history lines which have been modified.
+This variable is <SAMP>`off'</SAMP> by default.
+
+<DT><CODE>output-meta</CODE>
+<DD>
+<A NAME="IDX24"></A>
+If set to <SAMP>`on'</SAMP>, Readline will display characters with the
+eighth bit set directly rather than as a meta-prefixed escape
+sequence. The default is <SAMP>`off'</SAMP>.
+
+<DT><CODE>print-completions-horizontally</CODE>
+<DD>
+If set to <SAMP>`on'</SAMP>, Readline will display completions with matches
+sorted horizontally in alphabetical order, rather than down the screen.
+The default is <SAMP>`off'</SAMP>.
+
+<DT><CODE>show-all-if-ambiguous</CODE>
+<DD>
+<A NAME="IDX25"></A>
+This alters the default behavior of the completion functions. If
+set to <SAMP>`on'</SAMP>,
+words which have more than one possible completion cause the
+matches to be listed immediately instead of ringing the bell.
+The default value is <SAMP>`off'</SAMP>.
+
+<DT><CODE>visible-stats</CODE>
+<DD>
+<A NAME="IDX26"></A>
+If set to <SAMP>`on'</SAMP>, a character denoting a file's type
+is appended to the filename when listing possible
+completions. The default is <SAMP>`off'</SAMP>.
+
+</DL>
+
+<DT>Key Bindings
+<DD>
+The syntax for controlling key bindings in the init file is
+simple. First you need to find the name of the command that you
+want to change. The following sections contain tables of the command
+name, the default keybinding, if any, and a short description of what
+the command does.
+
+Once you know the name of the command, simply place on a line
+in the init file the name of the key
+you wish to bind the command to, a colon, and then the name of the
+command. The name of the key
+can be expressed in different ways, depending on what you find most
+comfortable.
+
+In addition to command names, readline allows keys to be bound
+to a string that is inserted when the key is pressed (a <VAR>macro</VAR>).
+
+<DL COMPACT>
+
+<DT><VAR>keyname</VAR>: <VAR>function-name</VAR> or <VAR>macro</VAR>
+<DD>
+<VAR>keyname</VAR> is the name of a key spelled out in English. For example:
+
+<PRE>
+Control-u: universal-argument
+Meta-Rubout: backward-kill-word
+Control-o: "&#62; output"
+</PRE>
+
+In the above example, <KBD>C-u</KBD> is bound to the function
+<CODE>universal-argument</CODE>,
+<KBD>M-DEL</KBD> is bound to the function <CODE>backward-kill-word</CODE>, and
+<KBD>C-o</KBD> is bound to run the macro
+expressed on the right hand side (that is, to insert the text
+<SAMP>`&#62; output'</SAMP> into the line).
+
+A number of symbolic character names are recognized while
+processing this key binding syntax:
+<VAR>DEL</VAR>,
+<VAR>ESC</VAR>,
+<VAR>ESCAPE</VAR>,
+<VAR>LFD</VAR>,
+<VAR>NEWLINE</VAR>,
+<VAR>RET</VAR>,
+<VAR>RETURN</VAR>,
+<VAR>RUBOUT</VAR>,
+<VAR>SPACE</VAR>,
+<VAR>SPC</VAR>,
+and
+<VAR>TAB</VAR>.
+
+<DT>"<VAR>keyseq</VAR>": <VAR>function-name</VAR> or <VAR>macro</VAR>
+<DD>
+<VAR>keyseq</VAR> differs from <VAR>keyname</VAR> above in that strings
+denoting an entire key sequence can be specified, by placing
+the key sequence in double quotes. Some GNU Emacs style key
+escapes can be used, as in the following example, but the
+special character names are not recognized.
+
+
+<PRE>
+"\C-u": universal-argument
+"\C-x\C-r": re-read-init-file
+"\e[11~": "Function Key 1"
+</PRE>
+
+In the above example, <KBD>C-u</KBD> is again bound to the function
+<CODE>universal-argument</CODE> (just as it was in the first example),
+<SAMP>`<KBD>C-x</KBD> <KBD>C-r</KBD>'</SAMP> is bound to the function <CODE>re-read-init-file</CODE>,
+and <SAMP>`<KBD>ESC</KBD> <KBD>[</KBD> <KBD>1</KBD> <KBD>1</KBD> <KBD>~</KBD>'</SAMP> is bound to insert
+the text <SAMP>`Function Key 1'</SAMP>.
+
+</DL>
+
+The following GNU Emacs style escape sequences are available when
+specifying key sequences:
+
+<DL COMPACT>
+
+<DT><CODE><KBD>\C-</KBD></CODE>
+<DD>
+control prefix
+<DT><CODE><KBD>\M-</KBD></CODE>
+<DD>
+meta prefix
+<DT><CODE><KBD>\e</KBD></CODE>
+<DD>
+an escape character
+<DT><CODE><KBD>\\</KBD></CODE>
+<DD>
+backslash
+<DT><CODE><KBD>\"</KBD></CODE>
+<DD>
+<KBD>"</KBD>, a double quotation mark
+<DT><CODE><KBD>\'</KBD></CODE>
+<DD>
+<KBD>'</KBD>, a single quote or apostrophe
+</DL>
+
+In addition to the GNU Emacs style escape sequences, a second
+set of backslash escapes is available:
+
+<DL COMPACT>
+
+<DT><CODE>\a</CODE>
+<DD>
+alert (bell)
+<DT><CODE>\b</CODE>
+<DD>
+backspace
+<DT><CODE>\d</CODE>
+<DD>
+delete
+<DT><CODE>\f</CODE>
+<DD>
+form feed
+<DT><CODE>\n</CODE>
+<DD>
+newline
+<DT><CODE>\r</CODE>
+<DD>
+carriage return
+<DT><CODE>\t</CODE>
+<DD>
+horizontal tab
+<DT><CODE>\v</CODE>
+<DD>
+vertical tab
+<DT><CODE>\<VAR>nnn</VAR></CODE>
+<DD>
+the character whose ASCII code is the octal value <VAR>nnn</VAR>
+(one to three digits)
+<DT><CODE>\x<VAR>nnn</VAR></CODE>
+<DD>
+the character whose ASCII code is the hexadecimal value <VAR>nnn</VAR>
+(one to three digits)
+</DL>
+
+When entering the text of a macro, single or double quotes must
+be used to indicate a macro definition.
+Unquoted text is assumed to be a function name.
+In the macro body, the backslash escapes described above are expanded.
+Backslash will quote any other character in the macro text,
+including <SAMP>`"'</SAMP> and <SAMP>`''</SAMP>.
+For example, the following binding will make <SAMP>`<KBD>C-x</KBD> \'</SAMP>
+insert a single <SAMP>`\'</SAMP> into the line:
+
+<PRE>
+"\C-x\\": "\\"
+</PRE>
+
+</DL>
+
+
+
+<H3><A NAME="SEC11" HREF="readline.html#TOC11">Conditional Init Constructs</A></H3>
+
+<P>
+Readline implements a facility similar in spirit to the conditional
+compilation features of the C preprocessor which allows key
+bindings and variable settings to be performed as the result
+of tests. There are four parser directives used.
+
+</P>
+<DL COMPACT>
+
+<DT><CODE>$if</CODE>
+<DD>
+The <CODE>$if</CODE> construct allows bindings to be made based on the
+editing mode, the terminal being used, or the application using
+Readline. The text of the test extends to the end of the line;
+no characters are required to isolate it.
+
+<DL COMPACT>
+
+<DT><CODE>mode</CODE>
+<DD>
+The <CODE>mode=</CODE> form of the <CODE>$if</CODE> directive is used to test
+whether Readline is in <CODE>emacs</CODE> or <CODE>vi</CODE> mode.
+This may be used in conjunction
+with the <SAMP>`set keymap'</SAMP> command, for instance, to set bindings in
+the <CODE>emacs-standard</CODE> and <CODE>emacs-ctlx</CODE> keymaps only if
+Readline is starting out in <CODE>emacs</CODE> mode.
+
+<DT><CODE>term</CODE>
+<DD>
+The <CODE>term=</CODE> form may be used to include terminal-specific
+key bindings, perhaps to bind the key sequences output by the
+terminal's function keys. The word on the right side of the
+<SAMP>`='</SAMP> is tested against both the full name of the terminal and
+the portion of the terminal name before the first <SAMP>`-'</SAMP>. This
+allows <CODE>sun</CODE> to match both <CODE>sun</CODE> and <CODE>sun-cmd</CODE>,
+for instance.
+
+<DT><CODE>application</CODE>
+<DD>
+The <VAR>application</VAR> construct is used to include
+application-specific settings. Each program using the Readline
+library sets the <VAR>application name</VAR>, and you can test for
+a particular value.
+This could be used to bind key sequences to functions useful for
+a specific program. For instance, the following command adds a
+key sequence that quotes the current or previous word in Bash:
+
+<PRE>
+$if Bash
+# Quote the current or previous word
+"\C-xq": "\eb\"\ef\""
+$endif
+</PRE>
+
+</DL>
+
+<DT><CODE>$endif</CODE>
+<DD>
+This command, as seen in the previous example, terminates an
+<CODE>$if</CODE> command.
+
+<DT><CODE>$else</CODE>
+<DD>
+Commands in this branch of the <CODE>$if</CODE> directive are executed if
+the test fails.
+
+<DT><CODE>$include</CODE>
+<DD>
+This directive takes a single filename as an argument and reads commands
+and bindings from that file.
+For example, the following directive reads from <TT>`/etc/inputrc'</TT>:
+
+<PRE>
+$include /etc/inputrc
+</PRE>
+
+</DL>
+
+
+
+<H3><A NAME="SEC12" HREF="readline.html#TOC12">Sample Init File</A></H3>
+
+<P>
+Here is an example of an <VAR>inputrc</VAR> file. This illustrates key
+binding, variable assignment, and conditional syntax.
+
+</P>
+
+<PRE>
+# This file controls the behaviour of line input editing for
+# programs that use the Gnu Readline library. Existing programs
+# include FTP, Bash, and Gdb.
+#
+# You can re-read the inputrc file with C-x C-r.
+# Lines beginning with '#' are comments.
+#
+# First, include any systemwide bindings and variable assignments from
+# /etc/Inputrc
+$include /etc/Inputrc
+
+#
+# Set various bindings for emacs mode.
+
+set editing-mode emacs
+
+$if mode=emacs
+
+Meta-Control-h: backward-kill-word Text after the function name is ignored
+
+#
+# Arrow keys in keypad mode
+#
+#"\M-OD": backward-char
+#"\M-OC": forward-char
+#"\M-OA": previous-history
+#"\M-OB": next-history
+#
+# Arrow keys in ANSI mode
+#
+"\M-[D": backward-char
+"\M-[C": forward-char
+"\M-[A": previous-history
+"\M-[B": next-history
+#
+# Arrow keys in 8 bit keypad mode
+#
+#"\M-\C-OD": backward-char
+#"\M-\C-OC": forward-char
+#"\M-\C-OA": previous-history
+#"\M-\C-OB": next-history
+#
+# Arrow keys in 8 bit ANSI mode
+#
+#"\M-\C-[D": backward-char
+#"\M-\C-[C": forward-char
+#"\M-\C-[A": previous-history
+#"\M-\C-[B": next-history
+
+C-q: quoted-insert
+
+$endif
+
+# An old-style binding. This happens to be the default.
+TAB: complete
+
+# Macros that are convenient for shell interaction
+$if Bash
+# edit the path
+"\C-xp": "PATH=${PATH}\e\C-e\C-a\ef\C-f"
+# prepare to type a quoted word -- insert open and close double quotes
+# and move to just after the open quote
+"\C-x\"": "\"\"\C-b"
+# insert a backslash (testing backslash escapes in sequences and macros)
+"\C-x\\": "\\"
+# Quote the current or previous word
+"\C-xq": "\eb\"\ef\""
+# Add a binding to refresh the line, which is unbound
+"\C-xr": redraw-current-line
+# Edit variable on current line.
+"\M-\C-v": "\C-a\C-k$\C-y\M-\C-e\C-a\C-y="
+$endif
+
+# use a visible bell if one is available
+set bell-style visible
+
+# don't strip characters to 7 bits when reading
+set input-meta on
+
+# allow iso-latin1 characters to be inserted rather than converted to
+# prefix-meta sequences
+set convert-meta off
+
+# display characters with the eighth bit set directly rather than
+# as meta-prefixed characters
+set output-meta on
+
+# if there are more than 150 possible completions for a word, ask the
+# user if he wants to see all of them
+set completion-query-items 150
+
+# For FTP
+$if Ftp
+"\C-xg": "get \M-?"
+"\C-xt": "put \M-?"
+"\M-.": yank-last-arg
+$endif
+</PRE>
+
+
+
+<H2><A NAME="SEC13" HREF="readline.html#TOC13">Bindable Readline Commands</A></H2>
+
+
+<UL>
+<LI><A HREF="readline.html#SEC14">Commands For Moving</A>: Moving about the line.
+<LI><A HREF="readline.html#SEC15">Commands For History</A>: Getting at previous lines.
+<LI><A HREF="readline.html#SEC16">Commands For Text</A>: Commands for changing text.
+<LI><A HREF="readline.html#SEC17">Commands For Killing</A>: Commands for killing and yanking.
+<LI><A HREF="readline.html#SEC18">Numeric Arguments</A>: Specifying numeric arguments, repeat counts.
+<LI><A HREF="readline.html#SEC19">Commands For Completion</A>: Getting Readline to do the typing for you.
+<LI><A HREF="readline.html#SEC20">Keyboard Macros</A>: Saving and re-executing typed characters
+<LI><A HREF="readline.html#SEC21">Miscellaneous Commands</A>: Other miscellaneous commands.
+</UL>
+
+<P>
+This section describes Readline commands that may be bound to key
+sequences.
+Command names without an accompanying key sequence are unbound by default.
+
+</P>
+<P>
+In the following descriptions, <EM>point</EM> refers to the current cursor
+position, and <EM>mark</EM> refers to a cursor position saved by the
+<CODE>set-mark</CODE> command.
+The text between the point and mark is referred to as the <EM>region</EM>.
+
+</P>
+
+
+<H3><A NAME="SEC14" HREF="readline.html#TOC14">Commands For Moving</A></H3>
+<DL COMPACT>
+
+<DT><CODE>beginning-of-line (C-a)</CODE>
+<DD>
+<A NAME="IDX27"></A>
+Move to the start of the current line.
+
+<DT><CODE>end-of-line (C-e)</CODE>
+<DD>
+<A NAME="IDX28"></A>
+Move to the end of the line.
+
+<DT><CODE>forward-char (C-f)</CODE>
+<DD>
+<A NAME="IDX29"></A>
+Move forward a character.
+
+<DT><CODE>backward-char (C-b)</CODE>
+<DD>
+<A NAME="IDX30"></A>
+Move back a character.
+
+<DT><CODE>forward-word (M-f)</CODE>
+<DD>
+<A NAME="IDX31"></A>
+Move forward to the end of the next word. Words are composed of
+letters and digits.
+
+<DT><CODE>backward-word (M-b)</CODE>
+<DD>
+<A NAME="IDX32"></A>
+Move back to the start of the current or previous word. Words are
+composed of letters and digits.
+
+<DT><CODE>clear-screen (C-l)</CODE>
+<DD>
+<A NAME="IDX33"></A>
+Clear the screen and redraw the current line,
+leaving the current line at the top of the screen.
+
+<DT><CODE>redraw-current-line ()</CODE>
+<DD>
+<A NAME="IDX34"></A>
+Refresh the current line. By default, this is unbound.
+
+</DL>
+
+
+
+<H3><A NAME="SEC15" HREF="readline.html#TOC15">Commands For Manipulating The History</A></H3>
+
+<DL COMPACT>
+
+<DT><CODE>accept-line (Newline or Return)</CODE>
+<DD>
+<A NAME="IDX35"></A>
+Accept the line regardless of where the cursor is.
+If this line is
+non-empty, it may be added to the history list for future recall with
+<CODE>add_history()</CODE>.
+If this line is a modified history line, the history line is restored
+to its original state.
+
+<DT><CODE>previous-history (C-p)</CODE>
+<DD>
+<A NAME="IDX36"></A>
+Move `back' through the history list, fetching the previous command.
+
+<DT><CODE>next-history (C-n)</CODE>
+<DD>
+<A NAME="IDX37"></A>
+Move `forward' through the history list, fetching the next command.
+
+<DT><CODE>beginning-of-history (M-&#60;)</CODE>
+<DD>
+<A NAME="IDX38"></A>
+Move to the first line in the history.
+
+<DT><CODE>end-of-history (M-&#62;)</CODE>
+<DD>
+<A NAME="IDX39"></A>
+Move to the end of the input history, i.e., the line currently
+being entered.
+
+<DT><CODE>reverse-search-history (C-r)</CODE>
+<DD>
+<A NAME="IDX40"></A>
+Search backward starting at the current line and moving `up' through
+the history as necessary. This is an incremental search.
+
+<DT><CODE>forward-search-history (C-s)</CODE>
+<DD>
+<A NAME="IDX41"></A>
+Search forward starting at the current line and moving `down' through
+the the history as necessary. This is an incremental search.
+
+<DT><CODE>non-incremental-reverse-search-history (M-p)</CODE>
+<DD>
+<A NAME="IDX42"></A>
+Search backward starting at the current line and moving `up'
+through the history as necessary using a non-incremental search
+for a string supplied by the user.
+
+<DT><CODE>non-incremental-forward-search-history (M-n)</CODE>
+<DD>
+<A NAME="IDX43"></A>
+Search forward starting at the current line and moving `down'
+through the the history as necessary using a non-incremental search
+for a string supplied by the user.
+
+<DT><CODE>history-search-forward ()</CODE>
+<DD>
+<A NAME="IDX44"></A>
+Search forward through the history for the string of characters
+between the start of the current line and the point.
+This is a non-incremental search.
+By default, this command is unbound.
+
+<DT><CODE>history-search-backward ()</CODE>
+<DD>
+<A NAME="IDX45"></A>
+Search backward through the history for the string of characters
+between the start of the current line and the point. This
+is a non-incremental search. By default, this command is unbound.
+
+<DT><CODE>yank-nth-arg (M-C-y)</CODE>
+<DD>
+<A NAME="IDX46"></A>
+Insert the first argument to the previous command (usually
+the second word on the previous line) at point.
+With an argument <VAR>n</VAR>,
+insert the <VAR>n</VAR>th word from the previous command (the words
+in the previous command begin with word 0). A negative argument
+inserts the <VAR>n</VAR>th word from the end of the previous command.
+
+<DT><CODE>yank-last-arg (M-. or M-_)</CODE>
+<DD>
+<A NAME="IDX47"></A>
+Insert last argument to the previous command (the last word of the
+previous history entry). With an
+argument, behave exactly like <CODE>yank-nth-arg</CODE>.
+Successive calls to <CODE>yank-last-arg</CODE> move back through the history
+list, inserting the last argument of each line in turn.
+
+</DL>
+
+
+
+<H3><A NAME="SEC16" HREF="readline.html#TOC16">Commands For Changing Text</A></H3>
+
+<DL COMPACT>
+
+<DT><CODE>delete-char (C-d)</CODE>
+<DD>
+<A NAME="IDX48"></A>
+Delete the character at point. If point is at the
+beginning of the line, there are no characters in the line, and
+the last character typed was not bound to <CODE>delete-char</CODE>, then
+return EOF.
+
+<DT><CODE>backward-delete-char (Rubout)</CODE>
+<DD>
+<A NAME="IDX49"></A>
+Delete the character behind the cursor. A numeric argument means
+to kill the characters instead of deleting them.
+
+<DT><CODE>forward-backward-delete-char ()</CODE>
+<DD>
+<A NAME="IDX50"></A>
+Delete the character under the cursor, unless the cursor is at the
+end of the line, in which case the character behind the cursor is
+deleted. By default, this is not bound to a key.
+
+<DT><CODE>quoted-insert (C-q or C-v)</CODE>
+<DD>
+<A NAME="IDX51"></A>
+Add the next character typed to the line verbatim. This is
+how to insert key sequences like <KBD>C-q</KBD>, for example.
+
+<DT><CODE>tab-insert (M-<KBD>TAB</KBD>)</CODE>
+<DD>
+<A NAME="IDX52"></A>
+Insert a tab character.
+
+<DT><CODE>self-insert (a, b, A, 1, !, ...)</CODE>
+<DD>
+<A NAME="IDX53"></A>
+Insert yourself.
+
+<DT><CODE>transpose-chars (C-t)</CODE>
+<DD>
+<A NAME="IDX54"></A>
+Drag the character before the cursor forward over
+the character at the cursor, moving the
+cursor forward as well. If the insertion point
+is at the end of the line, then this
+transposes the last two characters of the line.
+Negative arguments have no effect.
+
+<DT><CODE>transpose-words (M-t)</CODE>
+<DD>
+<A NAME="IDX55"></A>
+Drag the word before point past the word after point,
+moving point past that word as well.
+
+<DT><CODE>upcase-word (M-u)</CODE>
+<DD>
+<A NAME="IDX56"></A>
+Uppercase the current (or following) word. With a negative argument,
+uppercase the previous word, but do not move the cursor.
+
+<DT><CODE>downcase-word (M-l)</CODE>
+<DD>
+<A NAME="IDX57"></A>
+Lowercase the current (or following) word. With a negative argument,
+lowercase the previous word, but do not move the cursor.
+
+<DT><CODE>capitalize-word (M-c)</CODE>
+<DD>
+<A NAME="IDX58"></A>
+Capitalize the current (or following) word. With a negative argument,
+capitalize the previous word, but do not move the cursor.
+
+</DL>
+
+
+
+<H3><A NAME="SEC17" HREF="readline.html#TOC17">Killing And Yanking</A></H3>
+
+<DL COMPACT>
+
+<DT><CODE>kill-line (C-k)</CODE>
+<DD>
+<A NAME="IDX59"></A>
+Kill the text from point to the end of the line.
+
+<DT><CODE>backward-kill-line (C-x Rubout)</CODE>
+<DD>
+<A NAME="IDX60"></A>
+Kill backward to the beginning of the line.
+
+<DT><CODE>unix-line-discard (C-u)</CODE>
+<DD>
+<A NAME="IDX61"></A>
+Kill backward from the cursor to the beginning of the current line.
+
+<DT><CODE>kill-whole-line ()</CODE>
+<DD>
+<A NAME="IDX62"></A>
+Kill all characters on the current line, no matter where point is.
+By default, this is unbound.
+
+<DT><CODE>kill-word (M-d)</CODE>
+<DD>
+<A NAME="IDX63"></A>
+Kill from point to the end of the current word, or if between
+words, to the end of the next word.
+Word boundaries are the same as <CODE>forward-word</CODE>.
+
+<DT><CODE>backward-kill-word (M-<KBD>DEL</KBD>)</CODE>
+<DD>
+<A NAME="IDX64"></A>
+Kill the word behind point.
+Word boundaries are the same as <CODE>backward-word</CODE>.
+
+<DT><CODE>unix-word-rubout (C-w)</CODE>
+<DD>
+<A NAME="IDX65"></A>
+Kill the word behind point, using white space as a word boundary.
+The killed text is saved on the kill-ring.
+
+<DT><CODE>delete-horizontal-space ()</CODE>
+<DD>
+<A NAME="IDX66"></A>
+Delete all spaces and tabs around point. By default, this is unbound.
+
+<DT><CODE>kill-region ()</CODE>
+<DD>
+<A NAME="IDX67"></A>
+Kill the text in the current region.
+By default, this command is unbound.
+
+<DT><CODE>copy-region-as-kill ()</CODE>
+<DD>
+<A NAME="IDX68"></A>
+Copy the text in the region to the kill buffer, so it can be yanked
+right away. By default, this command is unbound.
+
+<DT><CODE>copy-backward-word ()</CODE>
+<DD>
+<A NAME="IDX69"></A>
+Copy the word before point to the kill buffer.
+The word boundaries are the same as <CODE>backward-word</CODE>.
+By default, this command is unbound.
+
+<DT><CODE>copy-forward-word ()</CODE>
+<DD>
+<A NAME="IDX70"></A>
+Copy the word following point to the kill buffer.
+The word boundaries are the same as <CODE>forward-word</CODE>.
+By default, this command is unbound.
+
+<DT><CODE>yank (C-y)</CODE>
+<DD>
+<A NAME="IDX71"></A>
+Yank the top of the kill ring into the buffer at point.
+
+<DT><CODE>yank-pop (M-y)</CODE>
+<DD>
+<A NAME="IDX72"></A>
+Rotate the kill-ring, and yank the new top. You can only do this if
+the prior command is <CODE>yank</CODE> or <CODE>yank-pop</CODE>.
+</DL>
+
+
+
+<H3><A NAME="SEC18" HREF="readline.html#TOC18">Specifying Numeric Arguments</A></H3>
+<DL COMPACT>
+
+<DT><CODE>digit-argument (<KBD>M-0</KBD>, <KBD>M-1</KBD>, ... <KBD>M--</KBD>)</CODE>
+<DD>
+<A NAME="IDX73"></A>
+Add this digit to the argument already accumulating, or start a new
+argument. <KBD>M--</KBD> starts a negative argument.
+
+<DT><CODE>universal-argument ()</CODE>
+<DD>
+<A NAME="IDX74"></A>
+This is another way to specify an argument.
+If this command is followed by one or more digits, optionally with a
+leading minus sign, those digits define the argument.
+If the command is followed by digits, executing <CODE>universal-argument</CODE>
+again ends the numeric argument, but is otherwise ignored.
+As a special case, if this command is immediately followed by a
+character that is neither a digit or minus sign, the argument count
+for the next command is multiplied by four.
+The argument count is initially one, so executing this function the
+first time makes the argument count four, a second time makes the
+argument count sixteen, and so on.
+By default, this is not bound to a key.
+</DL>
+
+
+
+<H3><A NAME="SEC19" HREF="readline.html#TOC19">Letting Readline Type For You</A></H3>
+
+<DL COMPACT>
+
+<DT><CODE>complete (<KBD>TAB</KBD>)</CODE>
+<DD>
+<A NAME="IDX75"></A>
+Attempt to perform completion on the text before point.
+The actual completion performed is application-specific.
+The default is filename completion.
+
+<DT><CODE>possible-completions (M-?)</CODE>
+<DD>
+<A NAME="IDX76"></A>
+List the possible completions of the text before point.
+
+<DT><CODE>insert-completions (M-*)</CODE>
+<DD>
+<A NAME="IDX77"></A>
+Insert all completions of the text before point that would have
+been generated by <CODE>possible-completions</CODE>.
+
+<DT><CODE>menu-complete ()</CODE>
+<DD>
+<A NAME="IDX78"></A>
+Similar to <CODE>complete</CODE>, but replaces the word to be completed
+with a single match from the list of possible completions.
+Repeated execution of <CODE>menu-complete</CODE> steps through the list
+of possible completions, inserting each match in turn.
+At the end of the list of completions, the bell is rung
+(subject to the setting of <CODE>bell-style</CODE>)
+and the original text is restored.
+An argument of <VAR>n</VAR> moves <VAR>n</VAR> positions forward in the list
+of matches; a negative argument may be used to move backward
+through the list.
+This command is intended to be bound to <KBD>TAB</KBD>, but is unbound
+by default.
+
+<DT><CODE>delete-char-or-list ()</CODE>
+<DD>
+<A NAME="IDX79"></A>
+Deletes the character under the cursor if not at the beginning or
+end of the line (like <CODE>delete-char</CODE>).
+If at the end of the line, behaves identically to
+<CODE>possible-completions</CODE>.
+This command is unbound by default.
+
+</DL>
+
+
+
+<H3><A NAME="SEC20" HREF="readline.html#TOC20">Keyboard Macros</A></H3>
+<DL COMPACT>
+
+<DT><CODE>start-kbd-macro (C-x ()</CODE>
+<DD>
+<A NAME="IDX80"></A>
+Begin saving the characters typed into the current keyboard macro.
+
+<DT><CODE>end-kbd-macro (C-x ))</CODE>
+<DD>
+<A NAME="IDX81"></A>
+Stop saving the characters typed into the current keyboard macro
+and save the definition.
+
+<DT><CODE>call-last-kbd-macro (C-x e)</CODE>
+<DD>
+<A NAME="IDX82"></A>
+Re-execute the last keyboard macro defined, by making the characters
+in the macro appear as if typed at the keyboard.
+
+</DL>
+
+
+
+<H3><A NAME="SEC21" HREF="readline.html#TOC21">Some Miscellaneous Commands</A></H3>
+<DL COMPACT>
+
+<DT><CODE>re-read-init-file (C-x C-r)</CODE>
+<DD>
+<A NAME="IDX83"></A>
+Read in the contents of the <VAR>inputrc</VAR> file, and incorporate
+any bindings or variable assignments found there.
+
+<DT><CODE>abort (C-g)</CODE>
+<DD>
+<A NAME="IDX84"></A>
+Abort the current editing command and
+ring the terminal's bell (subject to the setting of
+<CODE>bell-style</CODE>).
+
+<DT><CODE>do-uppercase-version (M-a, M-b, M-<VAR>x</VAR>, ...)</CODE>
+<DD>
+<A NAME="IDX85"></A>
+If the metafied character <VAR>x</VAR> is lowercase, run the command
+that is bound to the corresponding uppercase character.
+
+<DT><CODE>prefix-meta (<KBD>ESC</KBD>)</CODE>
+<DD>
+<A NAME="IDX86"></A>
+Metafy the next character typed. This is for keyboards
+without a meta key. Typing <SAMP>`<KBD>ESC</KBD> f'</SAMP> is equivalent to typing
+<KBD>M-f</KBD>.
+
+<DT><CODE>undo (C-_ or C-x C-u)</CODE>
+<DD>
+<A NAME="IDX87"></A>
+Incremental undo, separately remembered for each line.
+
+<DT><CODE>revert-line (M-r)</CODE>
+<DD>
+<A NAME="IDX88"></A>
+Undo all changes made to this line. This is like executing the <CODE>undo</CODE>
+command enough times to get back to the beginning.
+
+<DT><CODE>tilde-expand (M-~)</CODE>
+<DD>
+<A NAME="IDX89"></A>
+Perform tilde expansion on the current word.
+
+<DT><CODE>set-mark (C-@)</CODE>
+<DD>
+<A NAME="IDX90"></A>
+Set the mark to the point. If a
+numeric argument is supplied, the mark is set to that position.
+
+<DT><CODE>exchange-point-and-mark (C-x C-x)</CODE>
+<DD>
+<A NAME="IDX91"></A>
+Swap the point with the mark. The current cursor position is set to
+the saved position, and the old cursor position is saved as the mark.
+
+<DT><CODE>character-search (C-])</CODE>
+<DD>
+<A NAME="IDX92"></A>
+A character is read and point is moved to the next occurrence of that
+character. A negative count searches for previous occurrences.
+
+<DT><CODE>character-search-backward (M-C-])</CODE>
+<DD>
+<A NAME="IDX93"></A>
+A character is read and point is moved to the previous occurrence
+of that character. A negative count searches for subsequent
+occurrences.
+
+<DT><CODE>insert-comment (M-#)</CODE>
+<DD>
+<A NAME="IDX94"></A>
+The value of the <CODE>comment-begin</CODE>
+variable is inserted at the beginning of the current line,
+and the line is accepted as if a newline had been typed.
+
+<DT><CODE>dump-functions ()</CODE>
+<DD>
+<A NAME="IDX95"></A>
+Print all of the functions and their key bindings to the
+Readline output stream. If a numeric argument is supplied,
+the output is formatted in such a way that it can be made part
+of an <VAR>inputrc</VAR> file. This command is unbound by default.
+
+<DT><CODE>dump-variables ()</CODE>
+<DD>
+<A NAME="IDX96"></A>
+Print all of the settable variables and their values to the
+Readline output stream. If a numeric argument is supplied,
+the output is formatted in such a way that it can be made part
+of an <VAR>inputrc</VAR> file. This command is unbound by default.
+
+<DT><CODE>dump-macros ()</CODE>
+<DD>
+<A NAME="IDX97"></A>
+Print all of the Readline key sequences bound to macros and the
+strings they output. If a numeric argument is supplied,
+the output is formatted in such a way that it can be made part
+of an <VAR>inputrc</VAR> file. This command is unbound by default.
+
+</DL>
+
+
+
+<H2><A NAME="SEC22" HREF="readline.html#TOC22">Readline vi Mode</A></H2>
+
+<P>
+While the Readline library does not have a full set of <CODE>vi</CODE>
+editing functions, it does contain enough to allow simple editing
+of the line. The Readline <CODE>vi</CODE> mode behaves as specified in
+the POSIX 1003.2 standard.
+
+</P>
+<P>
+In order to switch interactively between <CODE>emacs</CODE> and <CODE>vi</CODE>
+editing modes, use the command <KBD>M-C-j</KBD> (bound to emacs-editing-mode
+when in <CODE>vi</CODE> mode and to vi-editing-mode in <CODE>emacs</CODE> mode).
+The Readline default is <CODE>emacs</CODE> mode.
+
+</P>
+<P>
+When you enter a line in <CODE>vi</CODE> mode, you are already placed in
+`insertion' mode, as if you had typed an <SAMP>`i'</SAMP>. Pressing <KBD>ESC</KBD>
+switches you into `command' mode, where you can edit the text of the
+line with the standard <CODE>vi</CODE> movement keys, move to previous
+history lines with <SAMP>`k'</SAMP> and subsequent lines with <SAMP>`j'</SAMP>, and
+so forth.
+
+</P>
+
+
+
+<H1><A NAME="SEC23" HREF="readline.html#TOC23">Programming with GNU Readline</A></H1>
+
+<P>
+This chapter describes the interface between the GNU Readline Library and
+other programs. If you are a programmer, and you wish to include the
+features found in GNU Readline
+such as completion, line editing, and interactive history manipulation
+in your own programs, this section is for you.
+
+</P>
+
+<UL>
+<LI><A HREF="readline.html#SEC24">Basic Behavior</A>: Using the default behavior of Readline.
+<LI><A HREF="readline.html#SEC25">Custom Functions</A>: Adding your own functions to Readline.
+<LI><A HREF="readline.html#SEC28">Readline Variables</A>: Variables accessible to custom
+ functions.
+<LI><A HREF="readline.html#SEC29">Readline Convenience Functions</A>: Functions which Readline supplies to
+ aid in writing your own custom
+ functions.
+<LI><A HREF="readline.html#SEC43">Readline Signal Handling</A>: How Readline behaves when it receives signals.
+<LI><A HREF="readline.html#SEC44">Custom Completers</A>: Supplanting or supplementing Readline's
+ completion functions.
+</UL>
+
+
+
+<H2><A NAME="SEC24" HREF="readline.html#TOC24">Basic Behavior</A></H2>
+
+<P>
+Many programs provide a command line interface, such as <CODE>mail</CODE>,
+<CODE>ftp</CODE>, and <CODE>sh</CODE>. For such programs, the default behaviour of
+Readline is sufficient. This section describes how to use Readline in
+the simplest way possible, perhaps to replace calls in your code to
+<CODE>gets()</CODE> or <CODE>fgets()</CODE>.
+
+</P>
+<P>
+<A NAME="IDX98"></A>
+<A NAME="IDX99"></A>
+
+</P>
+<P>
+The function <CODE>readline()</CODE> prints a prompt <VAR>prompt</VAR>
+and then reads and returns a single line of text from the user.
+If <VAR>prompt</VAR> is <CODE>NULL</CODE> or the empty string, no prompt is displayed.
+The line <CODE>readline</CODE> returns is allocated with <CODE>malloc()</CODE>;
+the caller should <CODE>free()</CODE> the line when it has finished with it.
+The declaration for <CODE>readline</CODE> in ANSI C is
+
+</P>
+
+<PRE>
+<CODE>char *readline (const char *<VAR>prompt</VAR>);</CODE>
+</PRE>
+
+<P>
+So, one might say
+
+<PRE>
+<CODE>char *line = readline ("Enter a line: ");</CODE>
+</PRE>
+
+<P>
+in order to read a line of text from the user.
+The line returned has the final newline removed, so only the
+text remains.
+
+</P>
+<P>
+If <CODE>readline</CODE> encounters an <CODE>EOF</CODE> while reading the line, and the
+line is empty at that point, then <CODE>(char *)NULL</CODE> is returned.
+Otherwise, the line is ended just as if a newline had been typed.
+
+</P>
+<P>
+If you want the user to be able to get at the line later, (with
+<KBD>C-p</KBD> for example), you must call <CODE>add_history()</CODE> to save the
+line away in a <EM>history</EM> list of such lines.
+
+</P>
+
+<PRE>
+<CODE>add_history (line)</CODE>;
+</PRE>
+
+<P>
+For full details on the GNU History Library, see the associated manual.
+
+</P>
+<P>
+It is preferable to avoid saving empty lines on the history list, since
+users rarely have a burning need to reuse a blank line. Here is
+a function which usefully replaces the standard <CODE>gets()</CODE> library
+function, and has the advantage of no static buffer to overflow:
+
+</P>
+
+<PRE>
+/* A static variable for holding the line. */
+static char *line_read = (char *)NULL;
+
+/* Read a string, and return a pointer to it. Returns NULL on EOF. */
+char *
+rl_gets ()
+{
+ /* If the buffer has already been allocated, return the memory
+ to the free pool. */
+ if (line_read)
+ {
+ free (line_read);
+ line_read = (char *)NULL;
+ }
+
+ /* Get a line from the user. */
+ line_read = readline ("");
+
+ /* If the line has any text in it, save it on the history. */
+ if (line_read &#38;&#38; *line_read)
+ add_history (line_read);
+
+ return (line_read);
+}
+</PRE>
+
+<P>
+This function gives the user the default behaviour of <KBD>TAB</KBD>
+completion: completion on file names. If you do not want Readline to
+complete on filenames, you can change the binding of the <KBD>TAB</KBD> key
+with <CODE>rl_bind_key()</CODE>.
+
+</P>
+
+<PRE>
+<CODE>int rl_bind_key (int <VAR>key</VAR>, rl_command_func_t *<VAR>function</VAR>);</CODE>
+</PRE>
+
+<P>
+<CODE>rl_bind_key()</CODE> takes two arguments: <VAR>key</VAR> is the character that
+you want to bind, and <VAR>function</VAR> is the address of the function to
+call when <VAR>key</VAR> is pressed. Binding <KBD>TAB</KBD> to <CODE>rl_insert()</CODE>
+makes <KBD>TAB</KBD> insert itself.
+<CODE>rl_bind_key()</CODE> returns non-zero if <VAR>key</VAR> is not a valid
+ASCII character code (between 0 and 255).
+
+</P>
+<P>
+Thus, to disable the default <KBD>TAB</KBD> behavior, the following suffices:
+
+<PRE>
+<CODE>rl_bind_key ('\t', rl_insert);</CODE>
+</PRE>
+
+<P>
+This code should be executed once at the start of your program; you
+might write a function called <CODE>initialize_readline()</CODE> which
+performs this and other desired initializations, such as installing
+custom completers (see section <A HREF="readline.html#SEC44">Custom Completers</A>).
+
+</P>
+
+
+<H2><A NAME="SEC25" HREF="readline.html#TOC25">Custom Functions</A></H2>
+
+<P>
+Readline provides many functions for manipulating the text of
+the line, but it isn't possible to anticipate the needs of all
+programs. This section describes the various functions and variables
+defined within the Readline library which allow a user program to add
+customized functionality to Readline.
+
+</P>
+<P>
+Before declaring any functions that customize Readline's behavior, or
+using any functionality Readline provides in other code, an
+application writer should include the file <CODE>&#60;readline/readline.h&#62;</CODE>
+in any file that uses Readline's features. Since some of the definitions
+in <CODE>readline.h</CODE> use the <CODE>stdio</CODE> library, the file
+<CODE>&#60;stdio.h&#62;</CODE> should be included before <CODE>readline.h</CODE>.
+
+</P>
+
+<UL>
+<LI><A HREF="readline.html#SEC26">Readline Typedefs</A>: C declarations to make code readable.
+<LI><A HREF="readline.html#SEC27">Function Writing</A>: Variables and calling conventions.
+</UL>
+
+
+
+<H3><A NAME="SEC26" HREF="readline.html#TOC26">Readline Typedefs</A></H3>
+
+<P>
+For readabilty, we declare a number of new object types, all pointers
+to functions.
+
+</P>
+<P>
+The reason for declaring these new types is to make it easier to write
+code describing pointers to C functions with appropriately prototyped
+arguments and return values.
+
+</P>
+<P>
+For instance, say we want to declare a variable <VAR>func</VAR> as a pointer
+to a function which takes two <CODE>int</CODE> arguments and returns an
+<CODE>int</CODE> (this is the type of all of the Readline bindable functions).
+Instead of the classic C declaration
+
+</P>
+<P>
+<CODE>int (*func)();</CODE>
+
+</P>
+<P>
+or the ANSI-C style declaration
+
+</P>
+<P>
+<CODE>int (*func)(int, int);</CODE>
+
+</P>
+<P>
+we may write
+
+</P>
+<P>
+<CODE>rl_command_func_t *func;</CODE>
+
+</P>
+<P>
+The full list of function pointer types available is
+
+</P>
+<DL COMPACT>
+
+<DT><CODE>typedef int rl_command_func_t (int, int);</CODE>
+<DD>
+<DT><CODE>typedef char *rl_compentry_func_t (const char *, int);</CODE>
+<DD>
+<DT><CODE>typedef char **rl_completion_func_t (const char *, int, int);</CODE>
+<DD>
+<DT><CODE>typedef char *rl_quote_func_t (char *, int, char *);</CODE>
+<DD>
+<DT><CODE>typedef char *rl_dequote_func_t (char *, int);</CODE>
+<DD>
+<DT><CODE>typedef int rl_compignore_func_t (char **);</CODE>
+<DD>
+<DT><CODE>typedef void rl_compdisp_func_t (char **, int, int);</CODE>
+<DD>
+<DT><CODE>typedef int rl_hook_func_t (void);</CODE>
+<DD>
+<DT><CODE>typedef int rl_getc_func_t (FILE *);</CODE>
+<DD>
+<DT><CODE>typedef int rl_linebuf_func_t (char *, int);</CODE>
+<DD>
+<DT><CODE>typedef int rl_intfunc_t (int);</CODE>
+<DD>
+<DT><CODE>#define rl_ivoidfunc_t rl_hook_func_t</CODE>
+<DD>
+<DT><CODE>typedef int rl_icpfunc_t (char *);</CODE>
+<DD>
+<DT><CODE>typedef int rl_icppfunc_t (char **);</CODE>
+<DD>
+<DT><CODE>typedef void rl_voidfunc_t (void);</CODE>
+<DD>
+<DT><CODE>typedef void rl_vintfunc_t (int);</CODE>
+<DD>
+<DT><CODE>typedef void rl_vcpfunc_t (char *);</CODE>
+<DD>
+<DT><CODE>typedef void rl_vcppfunc_t (char **);</CODE>
+<DD>
+</DL>
+
+
+
+<H3><A NAME="SEC27" HREF="readline.html#TOC27">Writing a New Function</A></H3>
+
+<P>
+In order to write new functions for Readline, you need to know the
+calling conventions for keyboard-invoked functions, and the names of the
+variables that describe the current state of the line read so far.
+
+</P>
+<P>
+The calling sequence for a command <CODE>foo</CODE> looks like
+
+</P>
+
+<PRE>
+<CODE>foo (int count, int key)</CODE>
+</PRE>
+
+<P>
+where <VAR>count</VAR> is the numeric argument (or 1 if defaulted) and
+<VAR>key</VAR> is the key that invoked this function.
+
+</P>
+<P>
+It is completely up to the function as to what should be done with the
+numeric argument. Some functions use it as a repeat count, some
+as a flag, and others to choose alternate behavior (refreshing the current
+line as opposed to refreshing the screen, for example). Some choose to
+ignore it. In general, if a
+function uses the numeric argument as a repeat count, it should be able
+to do something useful with both negative and positive arguments.
+At the very least, it should be aware that it can be passed a
+negative argument.
+
+</P>
+
+
+<H2><A NAME="SEC28" HREF="readline.html#TOC28">Readline Variables</A></H2>
+
+<P>
+These variables are available to function writers.
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> char * <B>rl_line_buffer</B>
+<DD><A NAME="IDX100"></A>
+This is the line gathered so far. You are welcome to modify the
+contents of the line, but see section <A HREF="readline.html#SEC34">Allowing Undoing</A>. The
+function <CODE>rl_extend_line_buffer</CODE> is available to increase
+the memory allocated to <CODE>rl_line_buffer</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_point</B>
+<DD><A NAME="IDX101"></A>
+The offset of the current cursor position in <CODE>rl_line_buffer</CODE>
+(the <EM>point</EM>).
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_end</B>
+<DD><A NAME="IDX102"></A>
+The number of characters present in <CODE>rl_line_buffer</CODE>. When
+<CODE>rl_point</CODE> is at the end of the line, <CODE>rl_point</CODE> and
+<CODE>rl_end</CODE> are equal.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_mark</B>
+<DD><A NAME="IDX103"></A>
+The <VAR>mark</VAR> (saved position) in the current line. If set, the mark
+and point define a <EM>region</EM>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_done</B>
+<DD><A NAME="IDX104"></A>
+Setting this to a non-zero value causes Readline to return the current
+line immediately.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_num_chars_to_read</B>
+<DD><A NAME="IDX105"></A>
+Setting this to a positive value before calling <CODE>readline()</CODE> causes
+Readline to return after accepting that many characters, rather
+than reading up to a character bound to <CODE>accept-line</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_pending_input</B>
+<DD><A NAME="IDX106"></A>
+Setting this to a value makes it the next keystroke read. This is a
+way to stuff a single character into the input stream.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_dispatching</B>
+<DD><A NAME="IDX107"></A>
+Set to a non-zero value if a function is being called from a key binding;
+zero otherwise. Application functions can test this to discover whether
+they were called directly or by Readline's dispatching mechanism.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_erase_empty_line</B>
+<DD><A NAME="IDX108"></A>
+Setting this to a non-zero value causes Readline to completely erase
+the current line, including any prompt, any time a newline is typed as
+the only character on an otherwise-empty line. The cursor is moved to
+the beginning of the newly-blank line.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> char * <B>rl_prompt</B>
+<DD><A NAME="IDX109"></A>
+The prompt Readline uses. This is set from the argument to
+<CODE>readline()</CODE>, and should not be assigned to directly.
+The <CODE>rl_set_prompt()</CODE> function (see section <A HREF="readline.html#SEC35">Redisplay</A>) may
+be used to modify the prompt string after calling <CODE>readline()</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_already_prompted</B>
+<DD><A NAME="IDX110"></A>
+If an application wishes to display the prompt itself, rather than have
+Readline do it the first time <CODE>readline()</CODE> is called, it should set
+this variable to a non-zero value after displaying the prompt.
+The prompt must also be passed as the argument to <CODE>readline()</CODE> so
+the redisplay functions can update the display properly.
+The calling application is responsible for managing the value; Readline
+never sets it.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> const char * <B>rl_library_version</B>
+<DD><A NAME="IDX111"></A>
+The version number of this revision of the library.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_gnu_readline_p</B>
+<DD><A NAME="IDX112"></A>
+Always set to 1, denoting that this is GNU readline rather than some
+emulation.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> const char * <B>rl_terminal_name</B>
+<DD><A NAME="IDX113"></A>
+The terminal type, used for initialization. If not set by the application,
+Readline sets this to the value of the @env{TERM} environment variable
+the first time it is called.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> const char * <B>rl_readline_name</B>
+<DD><A NAME="IDX114"></A>
+This variable is set to a unique name by each application using Readline.
+The value allows conditional parsing of the inputrc file
+(see section <A HREF="readline.html#SEC11">Conditional Init Constructs</A>).
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> FILE * <B>rl_instream</B>
+<DD><A NAME="IDX115"></A>
+The stdio stream from which Readline reads input.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> FILE * <B>rl_outstream</B>
+<DD><A NAME="IDX116"></A>
+The stdio stream to which Readline performs output.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_command_func_t * <B>rl_last_func</B>
+<DD><A NAME="IDX117"></A>
+The address of the last command function Readline executed. May be used to
+test whether or not a function is being executed twice in succession, for
+example.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_hook_func_t * <B>rl_startup_hook</B>
+<DD><A NAME="IDX118"></A>
+If non-zero, this is the address of a function to call just
+before <CODE>readline</CODE> prints the first prompt.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_hook_func_t * <B>rl_pre_input_hook</B>
+<DD><A NAME="IDX119"></A>
+If non-zero, this is the address of a function to call after
+the first prompt has been printed and just before <CODE>readline</CODE>
+starts reading input characters.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_hook_func_t * <B>rl_event_hook</B>
+<DD><A NAME="IDX120"></A>
+If non-zero, this is the address of a function to call periodically
+when Readline is waiting for terminal input.
+By default, this will be called at most ten times a second if there
+is no keyboard input.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_getc_func_t * <B>rl_getc_function</B>
+<DD><A NAME="IDX121"></A>
+If non-zero, Readline will call indirectly through this pointer
+to get a character from the input stream. By default, it is set to
+<CODE>rl_getc</CODE>, the default Readline character input function
+(see section <A HREF="readline.html#SEC37">Character Input</A>).
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_voidfunc_t * <B>rl_redisplay_function</B>
+<DD><A NAME="IDX122"></A>
+If non-zero, Readline will call indirectly through this pointer
+to update the display with the current contents of the editing buffer.
+By default, it is set to <CODE>rl_redisplay</CODE>, the default Readline
+redisplay function (see section <A HREF="readline.html#SEC35">Redisplay</A>).
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_vintfunc_t * <B>rl_prep_term_function</B>
+<DD><A NAME="IDX123"></A>
+If non-zero, Readline will call indirectly through this pointer
+to initialize the terminal. The function takes a single argument, an
+<CODE>int</CODE> flag that says whether or not to use eight-bit characters.
+By default, this is set to <CODE>rl_prep_terminal</CODE>
+(see section <A HREF="readline.html#SEC38">Terminal Management</A>).
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_voidfunc_t * <B>rl_deprep_term_function</B>
+<DD><A NAME="IDX124"></A>
+If non-zero, Readline will call indirectly through this pointer
+to reset the terminal. This function should undo the effects of
+<CODE>rl_prep_term_function</CODE>.
+By default, this is set to <CODE>rl_deprep_terminal</CODE>
+(see section <A HREF="readline.html#SEC38">Terminal Management</A>).
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> Keymap <B>rl_executing_keymap</B>
+<DD><A NAME="IDX125"></A>
+This variable is set to the keymap (see section <A HREF="readline.html#SEC31">Selecting a Keymap</A>) in which the
+currently executing readline function was found.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> Keymap <B>rl_binding_keymap</B>
+<DD><A NAME="IDX126"></A>
+This variable is set to the keymap (see section <A HREF="readline.html#SEC31">Selecting a Keymap</A>) in which the
+last key binding occurred.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> char * <B>rl_executing_macro</B>
+<DD><A NAME="IDX127"></A>
+This variable is set to the text of any currently-executing macro.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_readline_state</B>
+<DD><A NAME="IDX128"></A>
+A variable with bit values that encapsulate the current Readline state.
+A bit is set with the <CODE>RL_SETSTATE</CODE> macro, and unset with the
+<CODE>RL_UNSETSTATE</CODE> macro. Use the <CODE>RL_ISSTATE</CODE> macro to test
+whether a particular state bit is set. Current state bits include:
+
+</P>
+<DL COMPACT>
+
+<DT><CODE>RL_STATE_NONE</CODE>
+<DD>
+Readline has not yet been called, nor has it begun to intialize.
+<DT><CODE>RL_STATE_INITIALIZING</CODE>
+<DD>
+Readline is initializing its internal data structures.
+<DT><CODE>RL_STATE_INITIALIZED</CODE>
+<DD>
+Readline has completed its initialization.
+<DT><CODE>RL_STATE_TERMPREPPED</CODE>
+<DD>
+Readline has modified the terminal modes to do its own input and redisplay.
+<DT><CODE>RL_STATE_READCMD</CODE>
+<DD>
+Readline is reading a command from the keyboard.
+<DT><CODE>RL_STATE_METANEXT</CODE>
+<DD>
+Readline is reading more input after reading the meta-prefix character.
+<DT><CODE>RL_STATE_DISPATCHING</CODE>
+<DD>
+Readline is dispatching to a command.
+<DT><CODE>RL_STATE_MOREINPUT</CODE>
+<DD>
+Readline is reading more input while executing an editing command.
+<DT><CODE>RL_STATE_ISEARCH</CODE>
+<DD>
+Readline is performing an incremental history search.
+<DT><CODE>RL_STATE_NSEARCH</CODE>
+<DD>
+Readline is performing a non-incremental history search.
+<DT><CODE>RL_STATE_SEARCH</CODE>
+<DD>
+Readline is searching backward or forward through the history for a string.
+<DT><CODE>RL_STATE_NUMERICARG</CODE>
+<DD>
+Readline is reading a numeric argument.
+<DT><CODE>RL_STATE_MACROINPUT</CODE>
+<DD>
+Readline is currently getting its input from a previously-defined keyboard
+macro.
+<DT><CODE>RL_STATE_MACRODEF</CODE>
+<DD>
+Readline is currently reading characters defining a keyboard macro.
+<DT><CODE>RL_STATE_OVERWRITE</CODE>
+<DD>
+Readline is in overwrite mode.
+<DT><CODE>RL_STATE_COMPLETING</CODE>
+<DD>
+Readline is performing word completion.
+<DT><CODE>RL_STATE_SIGHANDLER</CODE>
+<DD>
+Readline is currently executing the readline signal handler.
+<DT><CODE>RL_STATE_UNDOING</CODE>
+<DD>
+Readline is performing an undo.
+<DT><CODE>RL_STATE_DONE</CODE>
+<DD>
+Readline has read a key sequence bound to <CODE>accept-line</CODE>
+and is about to return the line to the caller.
+</DL>
+
+</DL>
+
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_explicit_arg</B>
+<DD><A NAME="IDX129"></A>
+Set to a non-zero value if an explicit numeric argument was specified by
+the user. Only valid in a bindable command function.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_numeric_arg</B>
+<DD><A NAME="IDX130"></A>
+Set to the value of any numeric argument explicitly specified by the user
+before executing the current Readline function. Only valid in a bindable
+command function.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_editing_mode</B>
+<DD><A NAME="IDX131"></A>
+Set to a value denoting Readline's current editing mode. A value of
+<VAR>1</VAR> means Readline is currently in emacs mode; <VAR>0</VAR>
+means that vi mode is active.
+</DL>
+
+</P>
+
+
+
+<H2><A NAME="SEC29" HREF="readline.html#TOC29">Readline Convenience Functions</A></H2>
+
+
+<UL>
+<LI><A HREF="readline.html#SEC30">Function Naming</A>: How to give a function you write a name.
+<LI><A HREF="readline.html#SEC31">Keymaps</A>: Making keymaps.
+<LI><A HREF="readline.html#SEC32">Binding Keys</A>: Changing Keymaps.
+<LI><A HREF="readline.html#SEC33">Associating Function Names and Bindings</A>: Translate function names to
+ key sequences.
+<LI><A HREF="readline.html#SEC34">Allowing Undoing</A>: How to make your functions undoable.
+<LI><A HREF="readline.html#SEC35">Redisplay</A>: Functions to control line display.
+<LI><A HREF="readline.html#SEC36">Modifying Text</A>: Functions to modify <CODE>rl_line_buffer</CODE>.
+<LI><A HREF="readline.html#SEC37">Character Input</A>: Functions to read keyboard input.
+<LI><A HREF="readline.html#SEC38">Terminal Management</A>: Functions to manage terminal settings.
+<LI><A HREF="readline.html#SEC39">Utility Functions</A>: Generally useful functions and hooks.
+<LI><A HREF="readline.html#SEC40">Miscellaneous Functions</A>: Functions that don't fall into any category.
+<LI><A HREF="readline.html#SEC41">Alternate Interface</A>: Using Readline in a `callback' fashion.
+<LI><A HREF="readline.html#SEC42">A Readline Example</A>: An example Readline function.
+</UL>
+
+
+
+<H3><A NAME="SEC30" HREF="readline.html#TOC30">Naming a Function</A></H3>
+
+<P>
+The user can dynamically change the bindings of keys while using
+Readline. This is done by representing the function with a descriptive
+name. The user is able to type the descriptive name when referring to
+the function. Thus, in an init file, one might find
+
+</P>
+
+<PRE>
+Meta-Rubout: backward-kill-word
+</PRE>
+
+<P>
+This binds the keystroke <KBD>Meta-Rubout</KBD> to the function
+<EM>descriptively</EM> named <CODE>backward-kill-word</CODE>. You, as the
+programmer, should bind the functions you write to descriptive names as
+well. Readline provides a function for doing that:
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_add_defun</B> <I>(const char *name, rl_command_func_t *function, int key)</I>
+<DD><A NAME="IDX132"></A>
+Add <VAR>name</VAR> to the list of named functions. Make <VAR>function</VAR> be
+the function that gets called. If <VAR>key</VAR> is not -1, then bind it to
+<VAR>function</VAR> using <CODE>rl_bind_key()</CODE>.
+</DL>
+
+</P>
+<P>
+Using this function alone is sufficient for most applications. It is
+the recommended way to add a few functions to the default functions that
+Readline has built in. If you need to do something other
+than adding a function to Readline, you may need to use the
+underlying functions described below.
+
+</P>
+
+
+<H3><A NAME="SEC31" HREF="readline.html#TOC31">Selecting a Keymap</A></H3>
+
+<P>
+Key bindings take place on a <EM>keymap</EM>. The keymap is the
+association between the keys that the user types and the functions that
+get run. You can make your own keymaps, copy existing keymaps, and tell
+Readline which keymap to use.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> Keymap <B>rl_make_bare_keymap</B> <I>(void)</I>
+<DD><A NAME="IDX133"></A>
+Returns a new, empty keymap. The space for the keymap is allocated with
+<CODE>malloc()</CODE>; the caller should free it by calling
+<CODE>rl_discard_keymap()</CODE> when done.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> Keymap <B>rl_copy_keymap</B> <I>(Keymap map)</I>
+<DD><A NAME="IDX134"></A>
+Return a new keymap which is a copy of <VAR>map</VAR>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> Keymap <B>rl_make_keymap</B> <I>(void)</I>
+<DD><A NAME="IDX135"></A>
+Return a new keymap with the printing characters bound to rl_insert,
+the lowercase Meta characters bound to run their equivalents, and
+the Meta digits bound to produce numeric arguments.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_discard_keymap</B> <I>(Keymap keymap)</I>
+<DD><A NAME="IDX136"></A>
+Free the storage associated with <VAR>keymap</VAR>.
+</DL>
+
+</P>
+<P>
+Readline has several internal keymaps. These functions allow you to
+change which keymap is active.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> Keymap <B>rl_get_keymap</B> <I>(void)</I>
+<DD><A NAME="IDX137"></A>
+Returns the currently active keymap.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_set_keymap</B> <I>(Keymap keymap)</I>
+<DD><A NAME="IDX138"></A>
+Makes <VAR>keymap</VAR> the currently active keymap.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> Keymap <B>rl_get_keymap_by_name</B> <I>(const char *name)</I>
+<DD><A NAME="IDX139"></A>
+Return the keymap matching <VAR>name</VAR>. <VAR>name</VAR> is one which would
+be supplied in a <CODE>set keymap</CODE> inputrc line (see section <A HREF="readline.html#SEC9">Readline Init File</A>).
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> char * <B>rl_get_keymap_name</B> <I>(Keymap keymap)</I>
+<DD><A NAME="IDX140"></A>
+Return the name matching <VAR>keymap</VAR>. <VAR>name</VAR> is one which would
+be supplied in a <CODE>set keymap</CODE> inputrc line (see section <A HREF="readline.html#SEC9">Readline Init File</A>).
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC32" HREF="readline.html#TOC32">Binding Keys</A></H3>
+
+<P>
+Key sequences are associate with functions through the keymap.
+Readline has several internal keymaps: <CODE>emacs_standard_keymap</CODE>,
+<CODE>emacs_meta_keymap</CODE>, <CODE>emacs_ctlx_keymap</CODE>,
+<CODE>vi_movement_keymap</CODE>, and <CODE>vi_insertion_keymap</CODE>.
+<CODE>emacs_standard_keymap</CODE> is the default, and the examples in
+this manual assume that.
+
+</P>
+<P>
+Since <CODE>readline()</CODE> installs a set of default key bindings the first
+time it is called, there is always the danger that a custom binding
+installed before the first call to <CODE>readline()</CODE> will be overridden.
+An alternate mechanism is to install custom key bindings in an
+initialization function assigned to the <CODE>rl_startup_hook</CODE> variable
+(see section <A HREF="readline.html#SEC28">Readline Variables</A>).
+
+</P>
+<P>
+These functions manage key bindings.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_bind_key</B> <I>(int key, rl_command_func_t *function)</I>
+<DD><A NAME="IDX141"></A>
+Binds <VAR>key</VAR> to <VAR>function</VAR> in the currently active keymap.
+Returns non-zero in the case of an invalid <VAR>key</VAR>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_bind_key_in_map</B> <I>(int key, rl_command_func_t *function, Keymap map)</I>
+<DD><A NAME="IDX142"></A>
+Bind <VAR>key</VAR> to <VAR>function</VAR> in <VAR>map</VAR>. Returns non-zero in the case
+of an invalid <VAR>key</VAR>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_unbind_key</B> <I>(int key)</I>
+<DD><A NAME="IDX143"></A>
+Bind <VAR>key</VAR> to the null function in the currently active keymap.
+Returns non-zero in case of error.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_unbind_key_in_map</B> <I>(int key, Keymap map)</I>
+<DD><A NAME="IDX144"></A>
+Bind <VAR>key</VAR> to the null function in <VAR>map</VAR>.
+Returns non-zero in case of error.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_unbind_function_in_map</B> <I>(rl_command_func_t *function, Keymap map)</I>
+<DD><A NAME="IDX145"></A>
+Unbind all keys that execute <VAR>function</VAR> in <VAR>map</VAR>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_unbind_command_in_map</B> <I>(const char *command, Keymap map)</I>
+<DD><A NAME="IDX146"></A>
+Unbind all keys that are bound to <VAR>command</VAR> in <VAR>map</VAR>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_set_key</B> <I>(const char *keyseq, rl_command_func_t *function, Keymap map)</I>
+<DD><A NAME="IDX147"></A>
+Bind the key sequence represented by the string <VAR>keyseq</VAR> to the function
+<VAR>function</VAR>. This makes new keymaps as
+necessary. The initial keymap in which to do bindings is <VAR>map</VAR>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_generic_bind</B> <I>(int type, const char *keyseq, char *data, Keymap map)</I>
+<DD><A NAME="IDX148"></A>
+Bind the key sequence represented by the string <VAR>keyseq</VAR> to the arbitrary
+pointer <VAR>data</VAR>. <VAR>type</VAR> says what kind of data is pointed to by
+<VAR>data</VAR>; this can be a function (<CODE>ISFUNC</CODE>), a macro
+(<CODE>ISMACR</CODE>), or a keymap (<CODE>ISKMAP</CODE>). This makes new keymaps as
+necessary. The initial keymap in which to do bindings is <VAR>map</VAR>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_parse_and_bind</B> <I>(char *line)</I>
+<DD><A NAME="IDX149"></A>
+Parse <VAR>line</VAR> as if it had been read from the <CODE>inputrc</CODE> file and
+perform any key bindings and variable assignments found
+(see section <A HREF="readline.html#SEC9">Readline Init File</A>).
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_read_init_file</B> <I>(const char *filename)</I>
+<DD><A NAME="IDX150"></A>
+Read keybindings and variable assignments from <VAR>filename</VAR>
+(see section <A HREF="readline.html#SEC9">Readline Init File</A>).
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC33" HREF="readline.html#TOC33">Associating Function Names and Bindings</A></H3>
+
+<P>
+These functions allow you to find out what keys invoke named functions
+and the functions invoked by a particular key sequence. You may also
+associate a new function name with an arbitrary function.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> rl_command_func_t * <B>rl_named_function</B> <I>(const char *name)</I>
+<DD><A NAME="IDX151"></A>
+Return the function with name <VAR>name</VAR>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> rl_command_func_t * <B>rl_function_of_keyseq</B> <I>(const char *keyseq, Keymap map, int *type)</I>
+<DD><A NAME="IDX152"></A>
+Return the function invoked by <VAR>keyseq</VAR> in keymap <VAR>map</VAR>.
+If <VAR>map</VAR> is <CODE>NULL</CODE>, the current keymap is used. If <VAR>type</VAR> is
+not <CODE>NULL</CODE>, the type of the object is returned in the <CODE>int</CODE> variable
+it points to (one of <CODE>ISFUNC</CODE>, <CODE>ISKMAP</CODE>, or <CODE>ISMACR</CODE>).
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> char ** <B>rl_invoking_keyseqs</B> <I>(rl_command_func_t *function)</I>
+<DD><A NAME="IDX153"></A>
+Return an array of strings representing the key sequences used to
+invoke <VAR>function</VAR> in the current keymap.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> char ** <B>rl_invoking_keyseqs_in_map</B> <I>(rl_command_func_t *function, Keymap map)</I>
+<DD><A NAME="IDX154"></A>
+Return an array of strings representing the key sequences used to
+invoke <VAR>function</VAR> in the keymap <VAR>map</VAR>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_function_dumper</B> <I>(int readable)</I>
+<DD><A NAME="IDX155"></A>
+Print the readline function names and the key sequences currently
+bound to them to <CODE>rl_outstream</CODE>. If <VAR>readable</VAR> is non-zero,
+the list is formatted in such a way that it can be made part of an
+<CODE>inputrc</CODE> file and re-read.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_list_funmap_names</B> <I>(void)</I>
+<DD><A NAME="IDX156"></A>
+Print the names of all bindable Readline functions to <CODE>rl_outstream</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> const char ** <B>rl_funmap_names</B> <I>(void)</I>
+<DD><A NAME="IDX157"></A>
+Return a NULL terminated array of known function names. The array is
+sorted. The array itself is allocated, but not the strings inside. You
+should <CODE>free()</CODE> the array when you are done, but not the pointers.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_add_funmap_entry</B> <I>(const char *name, rl_command_func_t *function)</I>
+<DD><A NAME="IDX158"></A>
+Add <VAR>name</VAR> to the list of bindable Readline command names, and make
+<VAR>function</VAR> the function to be called when <VAR>name</VAR> is invoked.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC34" HREF="readline.html#TOC34">Allowing Undoing</A></H3>
+
+<P>
+Supporting the undo command is a painless thing, and makes your
+functions much more useful. It is certainly easy to try
+something if you know you can undo it.
+
+</P>
+<P>
+If your function simply inserts text once, or deletes text once, and
+uses <CODE>rl_insert_text()</CODE> or <CODE>rl_delete_text()</CODE> to do it, then
+undoing is already done for you automatically.
+
+</P>
+<P>
+If you do multiple insertions or multiple deletions, or any combination
+of these operations, you should group them together into one operation.
+This is done with <CODE>rl_begin_undo_group()</CODE> and
+<CODE>rl_end_undo_group()</CODE>.
+
+</P>
+<P>
+The types of events that can be undone are:
+
+</P>
+
+<PRE>
+enum undo_code { UNDO_DELETE, UNDO_INSERT, UNDO_BEGIN, UNDO_END };
+</PRE>
+
+<P>
+Notice that <CODE>UNDO_DELETE</CODE> means to insert some text, and
+<CODE>UNDO_INSERT</CODE> means to delete some text. That is, the undo code
+tells what to undo, not how to undo it. <CODE>UNDO_BEGIN</CODE> and
+<CODE>UNDO_END</CODE> are tags added by <CODE>rl_begin_undo_group()</CODE> and
+<CODE>rl_end_undo_group()</CODE>.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_begin_undo_group</B> <I>(void)</I>
+<DD><A NAME="IDX159"></A>
+Begins saving undo information in a group construct. The undo
+information usually comes from calls to <CODE>rl_insert_text()</CODE> and
+<CODE>rl_delete_text()</CODE>, but could be the result of calls to
+<CODE>rl_add_undo()</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_end_undo_group</B> <I>(void)</I>
+<DD><A NAME="IDX160"></A>
+Closes the current undo group started with <CODE>rl_begin_undo_group
+()</CODE>. There should be one call to <CODE>rl_end_undo_group()</CODE>
+for each call to <CODE>rl_begin_undo_group()</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_add_undo</B> <I>(enum undo_code what, int start, int end, char *text)</I>
+<DD><A NAME="IDX161"></A>
+Remember how to undo an event (according to <VAR>what</VAR>). The affected
+text runs from <VAR>start</VAR> to <VAR>end</VAR>, and encompasses <VAR>text</VAR>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_free_undo_list</B> <I>(void)</I>
+<DD><A NAME="IDX162"></A>
+Free the existing undo list.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_do_undo</B> <I>(void)</I>
+<DD><A NAME="IDX163"></A>
+Undo the first thing on the undo list. Returns <CODE>0</CODE> if there was
+nothing to undo, non-zero if something was undone.
+</DL>
+
+</P>
+<P>
+Finally, if you neither insert nor delete text, but directly modify the
+existing text (e.g., change its case), call <CODE>rl_modifying()</CODE>
+once, just before you modify the text. You must supply the indices of
+the text range that you are going to modify.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_modifying</B> <I>(int start, int end)</I>
+<DD><A NAME="IDX164"></A>
+Tell Readline to save the text between <VAR>start</VAR> and <VAR>end</VAR> as a
+single undo unit. It is assumed that you will subsequently modify
+that text.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC35" HREF="readline.html#TOC35">Redisplay</A></H3>
+
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_redisplay</B> <I>(void)</I>
+<DD><A NAME="IDX165"></A>
+Change what's displayed on the screen to reflect the current contents
+of <CODE>rl_line_buffer</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_forced_update_display</B> <I>(void)</I>
+<DD><A NAME="IDX166"></A>
+Force the line to be updated and redisplayed, whether or not
+Readline thinks the screen display is correct.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_on_new_line</B> <I>(void)</I>
+<DD><A NAME="IDX167"></A>
+Tell the update functions that we have moved onto a new (empty) line,
+usually after ouputting a newline.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_on_new_line_with_prompt</B> <I>(void)</I>
+<DD><A NAME="IDX168"></A>
+Tell the update functions that we have moved onto a new line, with
+<VAR>rl_prompt</VAR> already displayed.
+This could be used by applications that want to output the prompt string
+themselves, but still need Readline to know the prompt string length for
+redisplay.
+It should be used after setting <VAR>rl_already_prompted</VAR>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_reset_line_state</B> <I>(void)</I>
+<DD><A NAME="IDX169"></A>
+Reset the display state to a clean state and redisplay the current line
+starting on a new line.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_crlf</B> <I>(void)</I>
+<DD><A NAME="IDX170"></A>
+Move the cursor to the start of the next screen line.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_show_char</B> <I>(int c)</I>
+<DD><A NAME="IDX171"></A>
+Display character <VAR>c</VAR> on <CODE>rl_outstream</CODE>.
+If Readline has not been set to display meta characters directly, this
+will convert meta characters to a meta-prefixed key sequence.
+This is intended for use by applications which wish to do their own
+redisplay.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_message</B> <I>(const char *, ...)</I>
+<DD><A NAME="IDX172"></A>
+The arguments are a format string as would be supplied to <CODE>printf</CODE>,
+possibly containing conversion specifications such as <SAMP>`%d'</SAMP>, and
+any additional arguments necessary to satisfy the conversion specifications.
+The resulting string is displayed in the <EM>echo area</EM>. The echo area
+is also used to display numeric arguments and search strings.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_clear_message</B> <I>(void)</I>
+<DD><A NAME="IDX173"></A>
+Clear the message in the echo area.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_save_prompt</B> <I>(void)</I>
+<DD><A NAME="IDX174"></A>
+Save the local Readline prompt display state in preparation for
+displaying a new message in the message area with <CODE>rl_message()</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_restore_prompt</B> <I>(void)</I>
+<DD><A NAME="IDX175"></A>
+Restore the local Readline prompt display state saved by the most
+recent call to <CODE>rl_save_prompt</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_expand_prompt</B> <I>(char *prompt)</I>
+<DD><A NAME="IDX176"></A>
+Expand any special character sequences in <VAR>prompt</VAR> and set up the
+local Readline prompt redisplay variables.
+This function is called by <CODE>readline()</CODE>. It may also be called to
+expand the primary prompt if the <CODE>rl_on_new_line_with_prompt()</CODE>
+function or <CODE>rl_already_prompted</CODE> variable is used.
+It returns the number of visible characters on the last line of the
+(possibly multi-line) prompt.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_set_prompt</B> <I>(const char *prompt)</I>
+<DD><A NAME="IDX177"></A>
+Make Readline use <VAR>prompt</VAR> for subsequent redisplay. This calls
+<CODE>rl_expand_prompt()</CODE> to expand the prompt and sets <CODE>rl_prompt</CODE>
+to the result.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC36" HREF="readline.html#TOC36">Modifying Text</A></H3>
+
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_insert_text</B> <I>(const char *text)</I>
+<DD><A NAME="IDX178"></A>
+Insert <VAR>text</VAR> into the line at the current cursor position.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_delete_text</B> <I>(int start, int end)</I>
+<DD><A NAME="IDX179"></A>
+Delete the text between <VAR>start</VAR> and <VAR>end</VAR> in the current line.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> char * <B>rl_copy_text</B> <I>(int start, int end)</I>
+<DD><A NAME="IDX180"></A>
+Return a copy of the text between <VAR>start</VAR> and <VAR>end</VAR> in
+the current line.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_kill_text</B> <I>(int start, int end)</I>
+<DD><A NAME="IDX181"></A>
+Copy the text between <VAR>start</VAR> and <VAR>end</VAR> in the current line
+to the kill ring, appending or prepending to the last kill if the
+last command was a kill command. The text is deleted.
+If <VAR>start</VAR> is less than <VAR>end</VAR>,
+the text is appended, otherwise prepended. If the last command was
+not a kill, a new kill ring slot is used.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_push_macro_input</B> <I>(char *macro)</I>
+<DD><A NAME="IDX182"></A>
+Cause <VAR>macro</VAR> to be inserted into the line, as if it had been invoked
+by a key bound to a macro. Not especially useful; use
+<CODE>rl_insert_text()</CODE> instead.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC37" HREF="readline.html#TOC37">Character Input</A></H3>
+
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_read_key</B> <I>(void)</I>
+<DD><A NAME="IDX183"></A>
+Return the next character available from Readline's current input stream.
+This handles input inserted into
+the input stream via <VAR>rl_pending_input</VAR> (see section <A HREF="readline.html#SEC28">Readline Variables</A>)
+and <CODE>rl_stuff_char()</CODE>, macros, and characters read from the keyboard.
+While waiting for input, this function will call any function assigned to
+the <CODE>rl_event_hook</CODE> variable.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_getc</B> <I>(FILE *stream)</I>
+<DD><A NAME="IDX184"></A>
+Return the next character available from <VAR>stream</VAR>, which is assumed to
+be the keyboard.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_stuff_char</B> <I>(int c)</I>
+<DD><A NAME="IDX185"></A>
+Insert <VAR>c</VAR> into the Readline input stream. It will be "read"
+before Readline attempts to read characters from the terminal with
+<CODE>rl_read_key()</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_execute_next</B> <I>(int c)</I>
+<DD><A NAME="IDX186"></A>
+Make <VAR>c</VAR> be the next command to be executed when <CODE>rl_read_key()</CODE>
+is called. This sets <VAR>rl_pending_input</VAR>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_clear_pending_input</B> <I>(void)</I>
+<DD><A NAME="IDX187"></A>
+Unset <VAR>rl_pending_input</VAR>, effectively negating the effect of any
+previous call to <CODE>rl_execute_next()</CODE>. This works only if the
+pending input has not already been read with <CODE>rl_read_key()</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_set_keyboard_input_timeout</B> <I>(int u)</I>
+<DD><A NAME="IDX188"></A>
+While waiting for keyboard input in <CODE>rl_read_key()</CODE>, Readline will
+wait for <VAR>u</VAR> microseconds for input before calling any function
+assigned to <CODE>rl_event_hook</CODE>. The default waiting period is
+one-tenth of a second. Returns the old timeout value.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC38" HREF="readline.html#TOC38">Terminal Management</A></H3>
+
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_prep_terminal</B> <I>(int meta_flag)</I>
+<DD><A NAME="IDX189"></A>
+Modify the terminal settings for Readline's use, so <CODE>readline()</CODE>
+can read a single character at a time from the keyboard.
+The <VAR>meta_flag</VAR> argument should be non-zero if Readline should
+read eight-bit input.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_deprep_terminal</B> <I>(void)</I>
+<DD><A NAME="IDX190"></A>
+Undo the effects of <CODE>rl_prep_terminal()</CODE>, leaving the terminal in
+the state in which it was before the most recent call to
+<CODE>rl_prep_terminal()</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_tty_set_default_bindings</B> <I>(Keymap kmap)</I>
+<DD><A NAME="IDX191"></A>
+Read the operating system's terminal editing characters (as would be displayed
+by <CODE>stty</CODE>) to their Readline equivalents. The bindings are performed
+in <VAR>kmap</VAR>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_reset_terminal</B> <I>(const char *terminal_name)</I>
+<DD><A NAME="IDX192"></A>
+Reinitialize Readline's idea of the terminal settings using
+<VAR>terminal_name</VAR> as the terminal type (e.g., <CODE>vt100</CODE>).
+If <VAR>terminal_name</VAR> is <CODE>NULL</CODE>, the value of the <CODE>TERM</CODE>
+environment variable is used.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC39" HREF="readline.html#TOC39">Utility Functions</A></H3>
+
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_extend_line_buffer</B> <I>(int len)</I>
+<DD><A NAME="IDX193"></A>
+Ensure that <CODE>rl_line_buffer</CODE> has enough space to hold <VAR>len</VAR>
+characters, possibly reallocating it if necessary.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_initialize</B> <I>(void)</I>
+<DD><A NAME="IDX194"></A>
+Initialize or re-initialize Readline's internal state.
+It's not strictly necessary to call this; <CODE>readline()</CODE> calls it before
+reading any input.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_ding</B> <I>(void)</I>
+<DD><A NAME="IDX195"></A>
+Ring the terminal bell, obeying the setting of <CODE>bell-style</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_alphabetic</B> <I>(int c)</I>
+<DD><A NAME="IDX196"></A>
+Return 1 if <VAR>c</VAR> is an alphabetic character.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_display_match_list</B> <I>(char **matches, int len, int max)</I>
+<DD><A NAME="IDX197"></A>
+A convenience function for displaying a list of strings in
+columnar format on Readline's output stream. <CODE>matches</CODE> is the list
+of strings, in argv format, such as a list of completion matches.
+<CODE>len</CODE> is the number of strings in <CODE>matches</CODE>, and <CODE>max</CODE>
+is the length of the longest string in <CODE>matches</CODE>. This function uses
+the setting of <CODE>print-completions-horizontally</CODE> to select how the
+matches are displayed (see section <A HREF="readline.html#SEC10">Readline Init File Syntax</A>).
+</DL>
+
+</P>
+<P>
+The following are implemented as macros, defined in <CODE>chardefs.h</CODE>.
+Applications should refrain from using them.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>_rl_uppercase_p</B> <I>(int c)</I>
+<DD><A NAME="IDX198"></A>
+Return 1 if <VAR>c</VAR> is an uppercase alphabetic character.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>_rl_lowercase_p</B> <I>(int c)</I>
+<DD><A NAME="IDX199"></A>
+Return 1 if <VAR>c</VAR> is a lowercase alphabetic character.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>_rl_digit_p</B> <I>(int c)</I>
+<DD><A NAME="IDX200"></A>
+Return 1 if <VAR>c</VAR> is a numeric character.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>_rl_to_upper</B> <I>(int c)</I>
+<DD><A NAME="IDX201"></A>
+If <VAR>c</VAR> is a lowercase alphabetic character, return the corresponding
+uppercase character.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>_rl_to_lower</B> <I>(int c)</I>
+<DD><A NAME="IDX202"></A>
+If <VAR>c</VAR> is an uppercase alphabetic character, return the corresponding
+lowercase character.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>_rl_digit_value</B> <I>(int c)</I>
+<DD><A NAME="IDX203"></A>
+If <VAR>c</VAR> is a number, return the value it represents.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC40" HREF="readline.html#TOC40">Miscellaneous Functions</A></H3>
+
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_macro_bind</B> <I>(const char *keyseq, const char *macro, Keymap map)</I>
+<DD><A NAME="IDX204"></A>
+Bind the key sequence <VAR>keyseq</VAR> to invoke the macro <VAR>macro</VAR>.
+The binding is performed in <VAR>map</VAR>. When <VAR>keyseq</VAR> is invoked, the
+<VAR>macro</VAR> will be inserted into the line. This function is deprecated;
+use <CODE>rl_generic_bind()</CODE> instead.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_macro_dumper</B> <I>(int readable)</I>
+<DD><A NAME="IDX205"></A>
+Print the key sequences bound to macros and their values, using
+the current keymap, to <CODE>rl_outstream</CODE>.
+If <VAR>readable</VAR> is non-zero, the list is formatted in such a way
+that it can be made part of an <CODE>inputrc</CODE> file and re-read.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_variable_bind</B> <I>(const char *variable, const char *value)</I>
+<DD><A NAME="IDX206"></A>
+Make the Readline variable <VAR>variable</VAR> have <VAR>value</VAR>.
+This behaves as if the readline command
+<SAMP>`set <VAR>variable</VAR> <VAR>value</VAR>'</SAMP> had been executed in an <CODE>inputrc</CODE>
+file (see section <A HREF="readline.html#SEC10">Readline Init File Syntax</A>).
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_variable_dumper</B> <I>(int readable)</I>
+<DD><A NAME="IDX207"></A>
+Print the readline variable names and their current values
+to <CODE>rl_outstream</CODE>.
+If <VAR>readable</VAR> is non-zero, the list is formatted in such a way
+that it can be made part of an <CODE>inputrc</CODE> file and re-read.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_set_paren_blink_timeout</B> <I>(int u)</I>
+<DD><A NAME="IDX208"></A>
+Set the time interval (in microseconds) that Readline waits when showing
+a balancing character when <CODE>blink-matching-paren</CODE> has been enabled.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC41" HREF="readline.html#TOC41">Alternate Interface</A></H3>
+
+<P>
+An alternate interface is available to plain <CODE>readline()</CODE>. Some
+applications need to interleave keyboard I/O with file, device, or
+window system I/O, typically by using a main loop to <CODE>select()</CODE>
+on various file descriptors. To accomodate this need, readline can
+also be invoked as a `callback' function from an event loop. There
+are functions available to make this easy.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_callback_handler_install</B> <I>(const char *prompt, rl_vcpfunc_t *lhandler)</I>
+<DD><A NAME="IDX209"></A>
+Set up the terminal for readline I/O and display the initial
+expanded value of <VAR>prompt</VAR>. Save the value of <VAR>lhandler</VAR> to
+use as a function to call when a complete line of input has been entered.
+The function takes the text of the line as an argument.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_callback_read_char</B> <I>(void)</I>
+<DD><A NAME="IDX210"></A>
+Whenever an application determines that keyboard input is available, it
+should call <CODE>rl_callback_read_char()</CODE>, which will read the next
+character from the current input source. If that character completes the
+line, <CODE>rl_callback_read_char</CODE> will invoke the <VAR>lhandler</VAR>
+function saved by <CODE>rl_callback_handler_install</CODE> to process the
+line. <CODE>EOF</CODE> is indicated by calling <VAR>lhandler</VAR> with a
+<CODE>NULL</CODE> line.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_callback_handler_remove</B> <I>(void)</I>
+<DD><A NAME="IDX211"></A>
+Restore the terminal to its initial state and remove the line handler.
+This may be called from within a callback as well as independently.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC42" HREF="readline.html#TOC42">A Readline Example</A></H3>
+
+<P>
+Here is a function which changes lowercase characters to their uppercase
+equivalents, and uppercase characters to lowercase. If
+this function was bound to <SAMP>`M-c'</SAMP>, then typing <SAMP>`M-c'</SAMP> would
+change the case of the character under point. Typing <SAMP>`M-1 0 M-c'</SAMP>
+would change the case of the following 10 characters, leaving the cursor on
+the last character changed.
+
+</P>
+
+<PRE>
+/* Invert the case of the COUNT following characters. */
+int
+invert_case_line (count, key)
+ int count, key;
+{
+ register int start, end, i;
+
+ start = rl_point;
+
+ if (rl_point &#62;= rl_end)
+ return (0);
+
+ if (count &#60; 0)
+ {
+ direction = -1;
+ count = -count;
+ }
+ else
+ direction = 1;
+
+ /* Find the end of the range to modify. */
+ end = start + (count * direction);
+
+ /* Force it to be within range. */
+ if (end &#62; rl_end)
+ end = rl_end;
+ else if (end &#60; 0)
+ end = 0;
+
+ if (start == end)
+ return (0);
+
+ if (start &#62; end)
+ {
+ int temp = start;
+ start = end;
+ end = temp;
+ }
+
+ /* Tell readline that we are modifying the line, so it will save
+ the undo information. */
+ rl_modifying (start, end);
+
+ for (i = start; i != end; i++)
+ {
+ if (_rl_uppercase_p (rl_line_buffer[i]))
+ rl_line_buffer[i] = _rl_to_lower (rl_line_buffer[i]);
+ else if (_rl_lowercase_p (rl_line_buffer[i]))
+ rl_line_buffer[i] = _rl_to_upper (rl_line_buffer[i]);
+ }
+ /* Move point to on top of the last character changed. */
+ rl_point = (direction == 1) ? end - 1 : start;
+ return (0);
+}
+</PRE>
+
+
+
+<H2><A NAME="SEC43" HREF="readline.html#TOC43">Readline Signal Handling</A></H2>
+
+<P>
+Signals are asynchronous events sent to a process by the Unix kernel,
+sometimes on behalf of another process. They are intended to indicate
+exceptional events, like a user pressing the interrupt key on his terminal,
+or a network connection being broken. There is a class of signals that can
+be sent to the process currently reading input from the keyboard. Since
+Readline changes the terminal attributes when it is called, it needs to
+perform special processing when such a signal is received in order to
+restore the terminal to a sane state, or provide application writers with
+functions to do so manually.
+
+</P>
+<P>
+Readline contains an internal signal handler that is installed for a
+number of signals (<CODE>SIGINT</CODE>, <CODE>SIGQUIT</CODE>, <CODE>SIGTERM</CODE>,
+<CODE>SIGALRM</CODE>, <CODE>SIGTSTP</CODE>, <CODE>SIGTTIN</CODE>, and <CODE>SIGTTOU</CODE>).
+When one of these signals is received, the signal handler
+will reset the terminal attributes to those that were in effect before
+<CODE>readline()</CODE> was called, reset the signal handling to what it was
+before <CODE>readline()</CODE> was called, and resend the signal to the calling
+application.
+If and when the calling application's signal handler returns, Readline
+will reinitialize the terminal and continue to accept input.
+When a <CODE>SIGINT</CODE> is received, the Readline signal handler performs
+some additional work, which will cause any partially-entered line to be
+aborted (see the description of <CODE>rl_free_line_state()</CODE> below).
+
+</P>
+<P>
+There is an additional Readline signal handler, for <CODE>SIGWINCH</CODE>, which
+the kernel sends to a process whenever the terminal's size changes (for
+example, if a user resizes an <CODE>xterm</CODE>). The Readline <CODE>SIGWINCH</CODE>
+handler updates Readline's internal screen size information, and then calls
+any <CODE>SIGWINCH</CODE> signal handler the calling application has installed.
+Readline calls the application's <CODE>SIGWINCH</CODE> signal handler without
+resetting the terminal to its original state. If the application's signal
+handler does more than update its idea of the terminal size and return (for
+example, a <CODE>longjmp</CODE> back to a main processing loop), it <EM>must</EM>
+call <CODE>rl_cleanup_after_signal()</CODE> (described below), to restore the
+terminal state.
+
+</P>
+<P>
+Readline provides two variables that allow application writers to
+control whether or not it will catch certain signals and act on them
+when they are received. It is important that applications change the
+values of these variables only when calling <CODE>readline()</CODE>, not in
+a signal handler, so Readline's internal signal state is not corrupted.
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_catch_signals</B>
+<DD><A NAME="IDX212"></A>
+If this variable is non-zero, Readline will install signal handlers for
+<CODE>SIGINT</CODE>, <CODE>SIGQUIT</CODE>, <CODE>SIGTERM</CODE>, <CODE>SIGALRM</CODE>,
+<CODE>SIGTSTP</CODE>, <CODE>SIGTTIN</CODE>, and <CODE>SIGTTOU</CODE>.
+
+</P>
+<P>
+The default value of <CODE>rl_catch_signals</CODE> is 1.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_catch_sigwinch</B>
+<DD><A NAME="IDX213"></A>
+If this variable is non-zero, Readline will install a signal handler for
+<CODE>SIGWINCH</CODE>.
+
+</P>
+<P>
+The default value of <CODE>rl_catch_sigwinch</CODE> is 1.
+</DL>
+
+</P>
+<P>
+If an application does not wish to have Readline catch any signals, or
+to handle signals other than those Readline catches (<CODE>SIGHUP</CODE>,
+for example),
+Readline provides convenience functions to do the necessary terminal
+and internal state cleanup upon receipt of a signal.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_cleanup_after_signal</B> <I>(void)</I>
+<DD><A NAME="IDX214"></A>
+This function will reset the state of the terminal to what it was before
+<CODE>readline()</CODE> was called, and remove the Readline signal handlers for
+all signals, depending on the values of <CODE>rl_catch_signals</CODE> and
+<CODE>rl_catch_sigwinch</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_free_line_state</B> <I>(void)</I>
+<DD><A NAME="IDX215"></A>
+This will free any partial state associated with the current input line
+(undo information, any partial history entry, any partially-entered
+keyboard macro, and any partially-entered numeric argument). This
+should be called before <CODE>rl_cleanup_after_signal()</CODE>. The
+Readline signal handler for <CODE>SIGINT</CODE> calls this to abort the
+current input line.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_reset_after_signal</B> <I>(void)</I>
+<DD><A NAME="IDX216"></A>
+This will reinitialize the terminal and reinstall any Readline signal
+handlers, depending on the values of <CODE>rl_catch_signals</CODE> and
+<CODE>rl_catch_sigwinch</CODE>.
+</DL>
+
+</P>
+<P>
+If an application does not wish Readline to catch <CODE>SIGWINCH</CODE>, it may
+call <CODE>rl_resize_terminal()</CODE> or <CODE>rl_set_screen_size()</CODE> to force
+Readline to update its idea of the terminal size when a <CODE>SIGWINCH</CODE>
+is received.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_resize_terminal</B> <I>(void)</I>
+<DD><A NAME="IDX217"></A>
+Update Readline's internal screen size by reading values from the kernel.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_set_screen_size</B> <I>(int rows, int cols)</I>
+<DD><A NAME="IDX218"></A>
+Set Readline's idea of the terminal size to <VAR>rows</VAR> rows and
+<VAR>cols</VAR> columns.
+</DL>
+
+</P>
+<P>
+If an application does not want to install a <CODE>SIGWINCH</CODE> handler, but
+is still interested in the screen dimensions, Readline's idea of the screen
+size may be queried.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> void <B>rl_get_screen_size</B> <I>(int *rows, int *cols)</I>
+<DD><A NAME="IDX219"></A>
+Return Readline's idea of the terminal's size in the
+variables pointed to by the arguments.
+</DL>
+
+</P>
+<P>
+The following functions install and remove Readline's signal handlers.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_set_signals</B> <I>(void)</I>
+<DD><A NAME="IDX220"></A>
+Install Readline's signal handler for <CODE>SIGINT</CODE>, <CODE>SIGQUIT</CODE>,
+<CODE>SIGTERM</CODE>, <CODE>SIGALRM</CODE>, <CODE>SIGTSTP</CODE>, <CODE>SIGTTIN</CODE>,
+<CODE>SIGTTOU</CODE>, and <CODE>SIGWINCH</CODE>, depending on the values of
+<CODE>rl_catch_signals</CODE> and <CODE>rl_catch_sigwinch</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_clear_signals</B> <I>(void)</I>
+<DD><A NAME="IDX221"></A>
+Remove all of the Readline signal handlers installed by
+<CODE>rl_set_signals()</CODE>.
+</DL>
+
+</P>
+
+
+<H2><A NAME="SEC44" HREF="readline.html#TOC44">Custom Completers</A></H2>
+
+<P>
+Typically, a program that reads commands from the user has a way of
+disambiguating commands and data. If your program is one of these, then
+it can provide completion for commands, data, or both.
+The following sections describe how your program and Readline
+cooperate to provide this service.
+
+</P>
+
+<UL>
+<LI><A HREF="readline.html#SEC45">How Completing Works</A>: The logic used to do completion.
+<LI><A HREF="readline.html#SEC46">Completion Functions</A>: Functions provided by Readline.
+<LI><A HREF="readline.html#SEC47">Completion Variables</A>: Variables which control completion.
+<LI><A HREF="readline.html#SEC48">A Short Completion Example</A>: An example of writing completer subroutines.
+</UL>
+
+
+
+<H3><A NAME="SEC45" HREF="readline.html#TOC45">How Completing Works</A></H3>
+
+<P>
+In order to complete some text, the full list of possible completions
+must be available. That is, it is not possible to accurately
+expand a partial word without knowing all of the possible words
+which make sense in that context. The Readline library provides
+the user interface to completion, and two of the most common
+completion functions: filename and username. For completing other types
+of text, you must write your own completion function. This section
+describes exactly what such functions must do, and provides an example.
+
+</P>
+<P>
+There are three major functions used to perform completion:
+
+</P>
+
+<OL>
+<LI>
+
+The user-interface function <CODE>rl_complete()</CODE>. This function is
+called with the same arguments as other bindable Readline functions:
+<VAR>count</VAR> and <VAR>invoking_key</VAR>.
+It isolates the word to be completed and calls
+<CODE>rl_completion_matches()</CODE> to generate a list of possible completions.
+It then either lists the possible completions, inserts the possible
+completions, or actually performs the
+completion, depending on which behavior is desired.
+
+<LI>
+
+The internal function <CODE>rl_completion_matches()</CODE> uses an
+application-supplied <EM>generator</EM> function to generate the list of
+possible matches, and then returns the array of these matches.
+The caller should place the address of its generator function in
+<CODE>rl_completion_entry_function</CODE>.
+
+<LI>
+
+The generator function is called repeatedly from
+<CODE>rl_completion_matches()</CODE>, returning a string each time. The
+arguments to the generator function are <VAR>text</VAR> and <VAR>state</VAR>.
+<VAR>text</VAR> is the partial word to be completed. <VAR>state</VAR> is zero the
+first time the function is called, allowing the generator to perform
+any necessary initialization, and a positive non-zero integer for
+each subsequent call. The generator function returns
+<CODE>(char *)NULL</CODE> to inform <CODE>rl_completion_matches()</CODE> that there are
+no more possibilities left. Usually the generator function computes the
+list of possible completions when <VAR>state</VAR> is zero, and returns them
+one at a time on subsequent calls. Each string the generator function
+returns as a match must be allocated with <CODE>malloc()</CODE>; Readline
+frees the strings when it has finished with them.
+
+</OL>
+
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_complete</B> <I>(int ignore, int invoking_key)</I>
+<DD><A NAME="IDX222"></A>
+Complete the word at or before point. You have supplied the function
+that does the initial simple matching selection algorithm (see
+<CODE>rl_completion_matches()</CODE>). The default is to do filename completion.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_compentry_func_t * <B>rl_completion_entry_function</B>
+<DD><A NAME="IDX223"></A>
+This is a pointer to the generator function for
+<CODE>rl_completion_matches()</CODE>.
+If the value of <CODE>rl_completion_entry_function</CODE> is
+<CODE>NULL</CODE> then the default filename generator
+function, <CODE>rl_filename_completion_function()</CODE>, is used.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC46" HREF="readline.html#TOC46">Completion Functions</A></H3>
+
+<P>
+Here is the complete list of callable completion functions present in
+Readline.
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_complete_internal</B> <I>(int what_to_do)</I>
+<DD><A NAME="IDX224"></A>
+Complete the word at or before point. <VAR>what_to_do</VAR> says what to do
+with the completion. A value of <SAMP>`?'</SAMP> means list the possible
+completions. <SAMP>`TAB'</SAMP> means do standard completion. <SAMP>`*'</SAMP> means
+insert all of the possible completions. <SAMP>`!'</SAMP> means to display
+all of the possible completions, if there is more than one, as well as
+performing partial completion.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_complete</B> <I>(int ignore, int invoking_key)</I>
+<DD><A NAME="IDX225"></A>
+Complete the word at or before point. You have supplied the function
+that does the initial simple matching selection algorithm (see
+<CODE>rl_completion_matches()</CODE> and <CODE>rl_completion_entry_function</CODE>).
+The default is to do filename
+completion. This calls <CODE>rl_complete_internal()</CODE> with an
+argument depending on <VAR>invoking_key</VAR>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_possible_completions</B> <I>(int count, int invoking_key)</I>
+<DD><A NAME="IDX226"></A>
+List the possible completions. See description of <CODE>rl_complete
+()</CODE>. This calls <CODE>rl_complete_internal()</CODE> with an argument of
+<SAMP>`?'</SAMP>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> int <B>rl_insert_completions</B> <I>(int count, int invoking_key)</I>
+<DD><A NAME="IDX227"></A>
+Insert the list of possible completions into the line, deleting the
+partially-completed word. See description of <CODE>rl_complete()</CODE>.
+This calls <CODE>rl_complete_internal()</CODE> with an argument of <SAMP>`*'</SAMP>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> char ** <B>rl_completion_matches</B> <I>(const char *text, rl_compentry_func_t *entry_func)</I>
+<DD><A NAME="IDX228"></A>
+Returns an array of strings which is a list of completions for
+<VAR>text</VAR>. If there are no completions, returns <CODE>NULL</CODE>.
+The first entry in the returned array is the substitution for <VAR>text</VAR>.
+The remaining entries are the possible completions. The array is
+terminated with a <CODE>NULL</CODE> pointer.
+
+</P>
+<P>
+<VAR>entry_func</VAR> is a function of two args, and returns a
+<CODE>char *</CODE>. The first argument is <VAR>text</VAR>. The second is a
+state argument; it is zero on the first call, and non-zero on subsequent
+calls. <VAR>entry_func</VAR> returns a <CODE>NULL</CODE> pointer to the caller
+when there are no more matches.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> char * <B>rl_filename_completion_function</B> <I>(const char *text, int state)</I>
+<DD><A NAME="IDX229"></A>
+A generator function for filename completion in the general case.
+<VAR>text</VAR> is a partial filename.
+The Bash source is a useful reference for writing custom
+completion functions (the Bash completion functions call this and other
+Readline functions).
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Function:</U> char * <B>rl_username_completion_function</B> <I>(const char *text, int state)</I>
+<DD><A NAME="IDX230"></A>
+A completion generator for usernames. <VAR>text</VAR> contains a partial
+username preceded by a random character (usually <SAMP>`~'</SAMP>). As with all
+completion generators, <VAR>state</VAR> is zero on the first call and non-zero
+for subsequent calls.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC47" HREF="readline.html#TOC47">Completion Variables</A></H3>
+
+<P>
+<DL>
+<DT><U>Variable:</U> rl_compentry_func_t * <B>rl_completion_entry_function</B>
+<DD><A NAME="IDX231"></A>
+A pointer to the generator function for <CODE>rl_completion_matches()</CODE>.
+<CODE>NULL</CODE> means to use <CODE>rl_filename_completion_function()</CODE>, the default
+filename completer.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_completion_func_t * <B>rl_attempted_completion_function</B>
+<DD><A NAME="IDX232"></A>
+A pointer to an alternative function to create matches.
+The function is called with <VAR>text</VAR>, <VAR>start</VAR>, and <VAR>end</VAR>.
+<VAR>start</VAR> and <VAR>end</VAR> are indices in <CODE>rl_line_buffer</CODE> defining
+the boundaries of <VAR>text</VAR>, which is a character string.
+If this function exists and returns <CODE>NULL</CODE>, or if this variable is
+set to <CODE>NULL</CODE>, then <CODE>rl_complete()</CODE> will call the value of
+<CODE>rl_completion_entry_function</CODE> to generate matches, otherwise the
+array of strings returned will be used.
+If this function sets the <CODE>rl_attempted_completion_over</CODE>
+variable to a non-zero value, Readline will not perform its default
+completion even if this function returns no matches.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_quote_func_t * <B>rl_filename_quoting_function</B>
+<DD><A NAME="IDX233"></A>
+A pointer to a function that will quote a filename in an
+application-specific fashion. This is called if filename completion is being
+attempted and one of the characters in <CODE>rl_filename_quote_characters</CODE>
+appears in a completed filename. The function is called with
+<VAR>text</VAR>, <VAR>match_type</VAR>, and <VAR>quote_pointer</VAR>. The <VAR>text</VAR>
+is the filename to be quoted. The <VAR>match_type</VAR> is either
+<CODE>SINGLE_MATCH</CODE>, if there is only one completion match, or
+<CODE>MULT_MATCH</CODE>. Some functions use this to decide whether or not to
+insert a closing quote character. The <VAR>quote_pointer</VAR> is a pointer
+to any opening quote character the user typed. Some functions choose
+to reset this character.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_dequote_func_t * <B>rl_filename_dequoting_function</B>
+<DD><A NAME="IDX234"></A>
+A pointer to a function that will remove application-specific quoting
+characters from a filename before completion is attempted, so those
+characters do not interfere with matching the text against names in
+the filesystem. It is called with <VAR>text</VAR>, the text of the word
+to be dequoted, and <VAR>quote_char</VAR>, which is the quoting character
+that delimits the filename (usually <SAMP>`''</SAMP> or <SAMP>`"'</SAMP>). If
+<VAR>quote_char</VAR> is zero, the filename was not in an embedded string.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_linebuf_func_t * <B>rl_char_is_quoted_p</B>
+<DD><A NAME="IDX235"></A>
+A pointer to a function to call that determines whether or not a specific
+character in the line buffer is quoted, according to whatever quoting
+mechanism the program calling Readline uses. The function is called with
+two arguments: <VAR>text</VAR>, the text of the line, and <VAR>index</VAR>, the
+index of the character in the line. It is used to decide whether a
+character found in <CODE>rl_completer_word_break_characters</CODE> should be
+used to break words for the completer.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_completion_query_items</B>
+<DD><A NAME="IDX236"></A>
+Up to this many items will be displayed in response to a
+possible-completions call. After that, we ask the user if she is sure
+she wants to see them all. The default value is 100.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> const char * <B>rl_basic_word_break_characters</B>
+<DD><A NAME="IDX237"></A>
+The basic list of characters that signal a break between words for the
+completer routine. The default value of this variable is the characters
+which break words for completion in Bash:
+<CODE>" \t\n\"\\'`@$&#62;&#60;=;|&#38;{("</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> const char * <B>rl_basic_quote_characters</B>
+<DD><A NAME="IDX238"></A>
+A list of quote characters which can cause a word break.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> const char * <B>rl_completer_word_break_characters</B>
+<DD><A NAME="IDX239"></A>
+The list of characters that signal a break between words for
+<CODE>rl_complete_internal()</CODE>. The default list is the value of
+<CODE>rl_basic_word_break_characters</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> const char * <B>rl_completer_quote_characters</B>
+<DD><A NAME="IDX240"></A>
+A list of characters which can be used to quote a substring of the line.
+Completion occurs on the entire substring, and within the substring
+<CODE>rl_completer_word_break_characters</CODE> are treated as any other character,
+unless they also appear within this list.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> const char * <B>rl_filename_quote_characters</B>
+<DD><A NAME="IDX241"></A>
+A list of characters that cause a filename to be quoted by the completer
+when they appear in a completed filename. The default is the null string.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> const char * <B>rl_special_prefixes</B>
+<DD><A NAME="IDX242"></A>
+The list of characters that are word break characters, but should be
+left in <VAR>text</VAR> when it is passed to the completion function.
+Programs can use this to help determine what kind of completing to do.
+For instance, Bash sets this variable to "$@" so that it can complete
+shell variables and hostnames.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_completion_append_character</B>
+<DD><A NAME="IDX243"></A>
+When a single completion alternative matches at the end of the command
+line, this character is appended to the inserted completion text. The
+default is a space character (<SAMP>` '</SAMP>). Setting this to the null
+character (<SAMP>`\0'</SAMP>) prevents anything being appended automatically.
+This can be changed in custom completion functions to
+provide the "most sensible word separator character" according to
+an application-specific command line syntax specification.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_ignore_completion_duplicates</B>
+<DD><A NAME="IDX244"></A>
+If non-zero, then duplicates in the matches are removed.
+The default is 1.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_filename_completion_desired</B>
+<DD><A NAME="IDX245"></A>
+Non-zero means that the results of the matches are to be treated as
+filenames. This is <EM>always</EM> zero on entry, and can only be changed
+within a completion entry generator function. If it is set to a non-zero
+value, directory names have a slash appended and Readline attempts to
+quote completed filenames if they contain any characters in
+<CODE>rl_filename_quote_characters</CODE> and <CODE>rl_filename_quoting_desired</CODE>
+is set to a non-zero value.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_filename_quoting_desired</B>
+<DD><A NAME="IDX246"></A>
+Non-zero means that the results of the matches are to be quoted using
+double quotes (or an application-specific quoting mechanism) if the
+completed filename contains any characters in
+<CODE>rl_filename_quote_chars</CODE>. This is <EM>always</EM> non-zero
+on entry, and can only be changed within a completion entry generator
+function. The quoting is effected via a call to the function pointed to
+by <CODE>rl_filename_quoting_function</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_attempted_completion_over</B>
+<DD><A NAME="IDX247"></A>
+If an application-specific completion function assigned to
+<CODE>rl_attempted_completion_function</CODE> sets this variable to a non-zero
+value, Readline will not perform its default filename completion even
+if the application's completion function returns no matches.
+It should be set only by an application's completion function.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_completion_type</B>
+<DD><A NAME="IDX248"></A>
+Set to a character describing the type of completion Readline is currently
+attempting; see the description of <CODE>rl_complete_internal()</CODE>
+(see section <A HREF="readline.html#SEC46">Completion Functions</A>) for the list of characters.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> int <B>rl_inhibit_completion</B>
+<DD><A NAME="IDX249"></A>
+If this variable is non-zero, completion is inhibited. The completion
+character will be inserted as any other bound to <CODE>self-insert</CODE>.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_compignore_func_t * <B>rl_ignore_some_completions_function</B>
+<DD><A NAME="IDX250"></A>
+This function, if defined, is called by the completer when real filename
+completion is done, after all the matching names have been generated.
+It is passed a <CODE>NULL</CODE> terminated array of matches.
+The first element (<CODE>matches[0]</CODE>) is the
+maximal substring common to all matches. This function can
+re-arrange the list of matches as required, but each element deleted
+from the array must be freed.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_icppfunc_t * <B>rl_directory_completion_hook</B>
+<DD><A NAME="IDX251"></A>
+This function, if defined, is allowed to modify the directory portion
+of filenames Readline completes. It is called with the address of a
+string (the current directory name) as an argument, and may modify that string.
+If the string is replaced with a new string, the old value should be freed.
+Any modified directory name should have a trailing slash.
+The modified value will be displayed as part of the completion, replacing
+the directory portion of the pathname the user typed.
+It returns an integer that should be non-zero if the function modifies
+its directory argument.
+It could be used to expand symbolic links or shell variables in pathnames.
+</DL>
+
+</P>
+<P>
+<DL>
+<DT><U>Variable:</U> rl_compdisp_func_t * <B>rl_completion_display_matches_hook</B>
+<DD><A NAME="IDX252"></A>
+If non-zero, then this is the address of a function to call when
+completing a word would normally display the list of possible matches.
+This function is called in lieu of Readline displaying the list.
+It takes three arguments:
+(<CODE>char **</CODE><VAR>matches</VAR>, <CODE>int</CODE> <VAR>num_matches</VAR>, <CODE>int</CODE> <VAR>max_length</VAR>)
+where <VAR>matches</VAR> is the array of matching strings,
+<VAR>num_matches</VAR> is the number of strings in that array, and
+<VAR>max_length</VAR> is the length of the longest string in that array.
+Readline provides a convenience function, <CODE>rl_display_match_list</CODE>,
+that takes care of doing the display to Readline's output stream. That
+function may be called from this hook.
+</DL>
+
+</P>
+
+
+<H3><A NAME="SEC48" HREF="readline.html#TOC48">A Short Completion Example</A></H3>
+
+<P>
+Here is a small application demonstrating the use of the GNU Readline
+library. It is called <CODE>fileman</CODE>, and the source code resides in
+<TT>`examples/fileman.c'</TT>. This sample application provides
+completion of command names, line editing features, and access to the
+history list.
+
+</P>
+
+<PRE>
+/* fileman.c -- A tiny application which demonstrates how to use the
+ GNU Readline library. This application interactively allows users
+ to manipulate files and their modes. */
+
+#include &#60;stdio.h&#62;
+#include &#60;sys/types.h&#62;
+#include &#60;sys/file.h&#62;
+#include &#60;sys/stat.h&#62;
+#include &#60;sys/errno.h&#62;
+
+#include &#60;readline/readline.h&#62;
+#include &#60;readline/history.h&#62;
+
+extern char *xmalloc ();
+
+/* The names of functions that actually do the manipulation. */
+int com_list __P((char *));
+int com_view __P((char *));
+int com_rename __P((char *));
+int com_stat __P((char *));
+int com_pwd __P((char *));
+int com_delete __P((char *));
+int com_help __P((char *));
+int com_cd __P((char *));
+int com_quit __P((char *));
+
+/* A structure which contains information on the commands this program
+ can understand. */
+
+typedef struct {
+ char *name; /* User printable name of the function. */
+ rl_icpfunc_t *func; /* Function to call to do the job. */
+ char *doc; /* Documentation for this function. */
+} COMMAND;
+
+COMMAND commands[] = {
+ { "cd", com_cd, "Change to directory DIR" },
+ { "delete", com_delete, "Delete FILE" },
+ { "help", com_help, "Display this text" },
+ { "?", com_help, "Synonym for `help'" },
+ { "list", com_list, "List files in DIR" },
+ { "ls", com_list, "Synonym for `list'" },
+ { "pwd", com_pwd, "Print the current working directory" },
+ { "quit", com_quit, "Quit using Fileman" },
+ { "rename", com_rename, "Rename FILE to NEWNAME" },
+ { "stat", com_stat, "Print out statistics on FILE" },
+ { "view", com_view, "View the contents of FILE" },
+ { (char *)NULL, (rl_icpfunc_t *)NULL, (char *)NULL }
+};
+
+/* Forward declarations. */
+char *stripwhite ();
+COMMAND *find_command ();
+
+/* The name of this program, as taken from argv[0]. */
+char *progname;
+
+/* When non-zero, this means the user is done using this program. */
+int done;
+
+char *
+dupstr (s)
+ int s;
+{
+ char *r;
+
+ r = xmalloc (strlen (s) + 1);
+ strcpy (r, s);
+ return (r);
+}
+
+main (argc, argv)
+ int argc;
+ char **argv;
+{
+ char *line, *s;
+
+ progname = argv[0];
+
+ initialize_readline (); /* Bind our completer. */
+
+ /* Loop reading and executing lines until the user quits. */
+ for ( ; done == 0; )
+ {
+ line = readline ("FileMan: ");
+
+ if (!line)
+ break;
+
+ /* Remove leading and trailing whitespace from the line.
+ Then, if there is anything left, add it to the history list
+ and execute it. */
+ s = stripwhite (line);
+
+ if (*s)
+ {
+ add_history (s);
+ execute_line (s);
+ }
+
+ free (line);
+ }
+ exit (0);
+}
+
+/* Execute a command line. */
+int
+execute_line (line)
+ char *line;
+{
+ register int i;
+ COMMAND *command;
+ char *word;
+
+ /* Isolate the command word. */
+ i = 0;
+ while (line[i] &#38;&#38; whitespace (line[i]))
+ i++;
+ word = line + i;
+
+ while (line[i] &#38;&#38; !whitespace (line[i]))
+ i++;
+
+ if (line[i])
+ line[i++] = '\0';
+
+ command = find_command (word);
+
+ if (!command)
+ {
+ fprintf (stderr, "%s: No such command for FileMan.\n", word);
+ return (-1);
+ }
+
+ /* Get argument to command, if any. */
+ while (whitespace (line[i]))
+ i++;
+
+ word = line + i;
+
+ /* Call the function. */
+ return ((*(command-&#62;func)) (word));
+}
+
+/* Look up NAME as the name of a command, and return a pointer to that
+ command. Return a NULL pointer if NAME isn't a command name. */
+COMMAND *
+find_command (name)
+ char *name;
+{
+ register int i;
+
+ for (i = 0; commands[i].name; i++)
+ if (strcmp (name, commands[i].name) == 0)
+ return (&#38;commands[i]);
+
+ return ((COMMAND *)NULL);
+}
+
+/* Strip whitespace from the start and end of STRING. Return a pointer
+ into STRING. */
+char *
+stripwhite (string)
+ char *string;
+{
+ register char *s, *t;
+
+ for (s = string; whitespace (*s); s++)
+ ;
+
+ if (*s == 0)
+ return (s);
+
+ t = s + strlen (s) - 1;
+ while (t &#62; s &#38;&#38; whitespace (*t))
+ t--;
+ *++t = '\0';
+
+ return s;
+}
+
+/* **************************************************************** */
+/* */
+/* Interface to Readline Completion */
+/* */
+/* **************************************************************** */
+
+char *command_generator __P((const char *, int));
+char **fileman_completion __P((const char *, int, int));
+
+/* Tell the GNU Readline library how to complete. We want to try to
+ complete on command names if this is the first word in the line, or
+ on filenames if not. */
+initialize_readline ()
+{
+ /* Allow conditional parsing of the ~/.inputrc file. */
+ rl_readline_name = "FileMan";
+
+ /* Tell the completer that we want a crack first. */
+ rl_attempted_completion_function = fileman_completion;
+}
+
+/* Attempt to complete on the contents of TEXT. START and END
+ bound the region of rl_line_buffer that contains the word to
+ complete. TEXT is the word to complete. We can use the entire
+ contents of rl_line_buffer in case we want to do some simple
+ parsing. Returnthe array of matches, or NULL if there aren't any. */
+char **
+fileman_completion (text, start, end)
+ const char *text;
+ int start, end;
+{
+ char **matches;
+
+ matches = (char **)NULL;
+
+ /* If this word is at the start of the line, then it is a command
+ to complete. Otherwise it is the name of a file in the current
+ directory. */
+ if (start == 0)
+ matches = rl_completion_matches (text, command_generator);
+
+ return (matches);
+}
+
+/* Generator function for command completion. STATE lets us
+ know whether to start from scratch; without any state
+ (i.e. STATE == 0), then we start at the top of the list. */
+char *
+command_generator (text, state)
+ const char *text;
+ int state;
+{
+ static int list_index, len;
+ char *name;
+
+ /* If this is a new word to complete, initialize now. This
+ includes saving the length of TEXT for efficiency, and
+ initializing the index variable to 0. */
+ if (!state)
+ {
+ list_index = 0;
+ len = strlen (text);
+ }
+
+ /* Return the next name which partially matches from the
+ command list. */
+ while (name = commands[list_index].name)
+ {
+ list_index++;
+
+ if (strncmp (name, text, len) == 0)
+ return (dupstr(name));
+ }
+
+ /* If no names matched, then return NULL. */
+ return ((char *)NULL);
+}
+
+/* **************************************************************** */
+/* */
+/* FileMan Commands */
+/* */
+/* **************************************************************** */
+
+/* String to pass to system (). This is for the LIST, VIEW and RENAME
+ commands. */
+static char syscom[1024];
+
+/* List the file(s) named in arg. */
+com_list (arg)
+ char *arg;
+{
+ if (!arg)
+ arg = "";
+
+ sprintf (syscom, "ls -FClg %s", arg);
+ return (system (syscom));
+}
+
+com_view (arg)
+ char *arg;
+{
+ if (!valid_argument ("view", arg))
+ return 1;
+
+ sprintf (syscom, "more %s", arg);
+ return (system (syscom));
+}
+
+com_rename (arg)
+ char *arg;
+{
+ too_dangerous ("rename");
+ return (1);
+}
+
+com_stat (arg)
+ char *arg;
+{
+ struct stat finfo;
+
+ if (!valid_argument ("stat", arg))
+ return (1);
+
+ if (stat (arg, &#38;finfo) == -1)
+ {
+ perror (arg);
+ return (1);
+ }
+
+ printf ("Statistics for `%s':\n", arg);
+
+ printf ("%s has %d link%s, and is %d byte%s in length.\n", arg,
+ finfo.st_nlink,
+ (finfo.st_nlink == 1) ? "" : "s",
+ finfo.st_size,
+ (finfo.st_size == 1) ? "" : "s");
+ printf ("Inode Last Change at: %s", ctime (&#38;finfo.st_ctime));
+ printf (" Last access at: %s", ctime (&#38;finfo.st_atime));
+ printf (" Last modified at: %s", ctime (&#38;finfo.st_mtime));
+ return (0);
+}
+
+com_delete (arg)
+ char *arg;
+{
+ too_dangerous ("delete");
+ return (1);
+}
+
+/* Print out help for ARG, or for all of the commands if ARG is
+ not present. */
+com_help (arg)
+ char *arg;
+{
+ register int i;
+ int printed = 0;
+
+ for (i = 0; commands[i].name; i++)
+ {
+ if (!*arg || (strcmp (arg, commands[i].name) == 0))
+ {
+ printf ("%s\t\t%s.\n", commands[i].name, commands[i].doc);
+ printed++;
+ }
+ }
+
+ if (!printed)
+ {
+ printf ("No commands match `%s'. Possibilties are:\n", arg);
+
+ for (i = 0; commands[i].name; i++)
+ {
+ /* Print in six columns. */
+ if (printed == 6)
+ {
+ printed = 0;
+ printf ("\n");
+ }
+
+ printf ("%s\t", commands[i].name);
+ printed++;
+ }
+
+ if (printed)
+ printf ("\n");
+ }
+ return (0);
+}
+
+/* Change to the directory ARG. */
+com_cd (arg)
+ char *arg;
+{
+ if (chdir (arg) == -1)
+ {
+ perror (arg);
+ return 1;
+ }
+
+ com_pwd ("");
+ return (0);
+}
+
+/* Print out the current working directory. */
+com_pwd (ignore)
+ char *ignore;
+{
+ char dir[1024], *s;
+
+ s = getcwd (dir, sizeof(dir) - 1);
+ if (s == 0)
+ {
+ printf ("Error getting pwd: %s\n", dir);
+ return 1;
+ }
+
+ printf ("Current directory is %s\n", dir);
+ return 0;
+}
+
+/* The user wishes to quit using this program. Just set DONE
+ non-zero. */
+com_quit (arg)
+ char *arg;
+{
+ done = 1;
+ return (0);
+}
+
+/* Function which tells you that you can't do this. */
+too_dangerous (caller)
+ char *caller;
+{
+ fprintf (stderr,
+ "%s: Too dangerous for me to distribute. Write it yourself.\n",
+ caller);
+}
+
+/* Return non-zero if ARG is a valid argument for CALLER, else print
+ an error message and return zero. */
+int
+valid_argument (caller, arg)
+ char *caller, *arg;
+{
+ if (!arg || !*arg)
+ {
+ fprintf (stderr, "%s: Argument required.\n", caller);
+ return (0);
+ }
+
+ return (1);
+}
+</PRE>
+
+
+
+<H1><A NAME="SEC49" HREF="readline.html#TOC49">Concept Index</A></H1>
+<P>
+Jump to:
+<A HREF="#cindex_c">c</A>
+-
+<A HREF="#cindex_e">e</A>
+-
+<A HREF="#cindex_i">i</A>
+-
+<A HREF="#cindex_k">k</A>
+-
+<A HREF="#cindex_n">n</A>
+-
+<A HREF="#cindex_r">r</A>
+-
+<A HREF="#cindex_v">v</A>
+-
+<A HREF="#cindex_y">y</A>
+<P>
+<H2><A NAME="cindex_c">c</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX3">command editing</A>
+</DIR>
+<H2><A NAME="cindex_e">e</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX4">editing command lines</A>
+</DIR>
+<H2><A NAME="cindex_i">i</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX8">initialization file, readline</A>
+<LI><A HREF="readline.html#IDX1">interaction, readline</A>
+</DIR>
+<H2><A NAME="cindex_k">k</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX7">kill ring</A>
+<LI><A HREF="readline.html#IDX5">killing text</A>
+</DIR>
+<H2><A NAME="cindex_n">n</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX2">notation, readline</A>
+</DIR>
+<H2><A NAME="cindex_r">r</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX99">readline, function</A>
+</DIR>
+<H2><A NAME="cindex_v">v</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX9">variables, readline</A>
+</DIR>
+<H2><A NAME="cindex_y">y</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX6">yanking text</A>
+</DIR>
+
+</P>
+
+
+<H1><A NAME="SEC50" HREF="readline.html#TOC50">Function and Variable Index</A></H1>
+<P>
+Jump to:
+<A HREF="#findex__">_</A>
+-
+<A HREF="#findex_a">a</A>
+-
+<A HREF="#findex_b">b</A>
+-
+<A HREF="#findex_c">c</A>
+-
+<A HREF="#findex_d">d</A>
+-
+<A HREF="#findex_e">e</A>
+-
+<A HREF="#findex_f">f</A>
+-
+<A HREF="#findex_h">h</A>
+-
+<A HREF="#findex_i">i</A>
+-
+<A HREF="#findex_k">k</A>
+-
+<A HREF="#findex_m">m</A>
+-
+<A HREF="#findex_n">n</A>
+-
+<A HREF="#findex_o">o</A>
+-
+<A HREF="#findex_p">p</A>
+-
+<A HREF="#findex_q">q</A>
+-
+<A HREF="#findex_r">r</A>
+-
+<A HREF="#findex_s">s</A>
+-
+<A HREF="#findex_t">t</A>
+-
+<A HREF="#findex_u">u</A>
+-
+<A HREF="#findex_v">v</A>
+-
+<A HREF="#findex_y">y</A>
+<P>
+<H2><A NAME="findex__">_</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX200">_rl_digit_p</A>
+<LI><A HREF="readline.html#IDX203">_rl_digit_value</A>
+<LI><A HREF="readline.html#IDX199">_rl_lowercase_p</A>
+<LI><A HREF="readline.html#IDX202">_rl_to_lower</A>
+<LI><A HREF="readline.html#IDX201">_rl_to_upper</A>
+<LI><A HREF="readline.html#IDX198">_rl_uppercase_p</A>
+</DIR>
+<H2><A NAME="findex_a">a</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX84">abort (C-g)</A>
+<LI><A HREF="readline.html#IDX35">accept-line (Newline or Return)</A>
+</DIR>
+<H2><A NAME="findex_b">b</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX30">backward-char (C-b)</A>
+<LI><A HREF="readline.html#IDX49">backward-delete-char (Rubout)</A>
+<LI><A HREF="readline.html#IDX60">backward-kill-line (C-x Rubout)</A>
+<LI><A HREF="readline.html#IDX64">backward-kill-word (M-<KBD>DEL</KBD>)</A>
+<LI><A HREF="readline.html#IDX32">backward-word (M-b)</A>
+<LI><A HREF="readline.html#IDX38">beginning-of-history (M-&#38;#60;)</A>
+<LI><A HREF="readline.html#IDX27">beginning-of-line (C-a)</A>
+<LI><A HREF="readline.html#IDX10">bell-style</A>
+</DIR>
+<H2><A NAME="findex_c">c</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX82">call-last-kbd-macro (C-x e)</A>
+<LI><A HREF="readline.html#IDX58">capitalize-word (M-c)</A>
+<LI><A HREF="readline.html#IDX92">character-search (C-])</A>
+<LI><A HREF="readline.html#IDX93">character-search-backward (M-C-])</A>
+<LI><A HREF="readline.html#IDX33">clear-screen (C-l)</A>
+<LI><A HREF="readline.html#IDX11">comment-begin</A>
+<LI><A HREF="readline.html#IDX75">complete (<KBD>TAB</KBD>)</A>
+<LI><A HREF="readline.html#IDX12">completion-query-items</A>
+<LI><A HREF="readline.html#IDX13">convert-meta</A>
+<LI><A HREF="readline.html#IDX69">copy-backward-word ()</A>
+<LI><A HREF="readline.html#IDX70">copy-forward-word ()</A>
+<LI><A HREF="readline.html#IDX68">copy-region-as-kill ()</A>
+</DIR>
+<H2><A NAME="findex_d">d</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX48">delete-char (C-d)</A>
+<LI><A HREF="readline.html#IDX79">delete-char-or-list ()</A>
+<LI><A HREF="readline.html#IDX66">delete-horizontal-space ()</A>
+<LI><A HREF="readline.html#IDX73">digit-argument (<KBD>M-0</KBD>, <KBD>M-1</KBD>, ... <KBD>M--</KBD>)</A>
+<LI><A HREF="readline.html#IDX14">disable-completion</A>
+<LI><A HREF="readline.html#IDX85">do-uppercase-version (M-a, M-b, M-<VAR>x</VAR>, ...)</A>
+<LI><A HREF="readline.html#IDX57">downcase-word (M-l)</A>
+<LI><A HREF="readline.html#IDX95">dump-functions ()</A>
+<LI><A HREF="readline.html#IDX97">dump-macros ()</A>
+<LI><A HREF="readline.html#IDX96">dump-variables ()</A>
+</DIR>
+<H2><A NAME="findex_e">e</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX15">editing-mode</A>
+<LI><A HREF="readline.html#IDX16">enable-keypad</A>
+<LI><A HREF="readline.html#IDX81">end-kbd-macro (C-x ))</A>
+<LI><A HREF="readline.html#IDX39">end-of-history (M-&#38;#62;)</A>
+<LI><A HREF="readline.html#IDX28">end-of-line (C-e)</A>
+<LI><A HREF="readline.html#IDX91">exchange-point-and-mark (C-x C-x)</A>
+<LI><A HREF="readline.html#IDX17">expand-tilde</A>
+</DIR>
+<H2><A NAME="findex_f">f</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX50">forward-backward-delete-char ()</A>
+<LI><A HREF="readline.html#IDX29">forward-char (C-f)</A>
+<LI><A HREF="readline.html#IDX41">forward-search-history (C-s)</A>
+<LI><A HREF="readline.html#IDX31">forward-word (M-f)</A>
+</DIR>
+<H2><A NAME="findex_h">h</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX45">history-search-backward ()</A>
+<LI><A HREF="readline.html#IDX44">history-search-forward ()</A>
+<LI><A HREF="readline.html#IDX18">horizontal-scroll-mode</A>
+</DIR>
+<H2><A NAME="findex_i">i</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX19">input-meta</A>
+<LI><A HREF="readline.html#IDX94">insert-comment (M-#)</A>
+<LI><A HREF="readline.html#IDX77">insert-completions (M-*)</A>
+<LI><A HREF="readline.html#IDX21">isearch-terminators</A>
+</DIR>
+<H2><A NAME="findex_k">k</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX22">keymap</A>
+<LI><A HREF="readline.html#IDX59">kill-line (C-k)</A>
+<LI><A HREF="readline.html#IDX67">kill-region ()</A>
+<LI><A HREF="readline.html#IDX62">kill-whole-line ()</A>
+<LI><A HREF="readline.html#IDX63">kill-word (M-d)</A>
+</DIR>
+<H2><A NAME="findex_m">m</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX23">mark-modified-lines</A>
+<LI><A HREF="readline.html#IDX78">menu-complete ()</A>
+<LI><A HREF="readline.html#IDX20">meta-flag</A>
+</DIR>
+<H2><A NAME="findex_n">n</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX37">next-history (C-n)</A>
+<LI><A HREF="readline.html#IDX43">non-incremental-forward-search-history (M-n)</A>
+<LI><A HREF="readline.html#IDX42">non-incremental-reverse-search-history (M-p)</A>
+</DIR>
+<H2><A NAME="findex_o">o</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX24">output-meta</A>
+</DIR>
+<H2><A NAME="findex_p">p</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX76">possible-completions (M-?)</A>
+<LI><A HREF="readline.html#IDX86">prefix-meta (<KBD>ESC</KBD>)</A>
+<LI><A HREF="readline.html#IDX36">previous-history (C-p)</A>
+</DIR>
+<H2><A NAME="findex_q">q</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX51">quoted-insert (C-q or C-v)</A>
+</DIR>
+<H2><A NAME="findex_r">r</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX83">re-read-init-file (C-x C-r)</A>
+<LI><A HREF="readline.html#IDX98">readline</A>
+<LI><A HREF="readline.html#IDX34">redraw-current-line ()</A>
+<LI><A HREF="readline.html#IDX40">reverse-search-history (C-r)</A>
+<LI><A HREF="readline.html#IDX88">revert-line (M-r)</A>
+<LI><A HREF="readline.html#IDX132">rl_add_defun</A>
+<LI><A HREF="readline.html#IDX158">rl_add_funmap_entry</A>
+<LI><A HREF="readline.html#IDX161">rl_add_undo</A>
+<LI><A HREF="readline.html#IDX196">rl_alphabetic</A>
+<LI><A HREF="readline.html#IDX110">rl_already_prompted</A>
+<LI><A HREF="readline.html#IDX232">rl_attempted_completion_function</A>
+<LI><A HREF="readline.html#IDX247">rl_attempted_completion_over</A>
+<LI><A HREF="readline.html#IDX238">rl_basic_quote_characters</A>
+<LI><A HREF="readline.html#IDX237">rl_basic_word_break_characters</A>
+<LI><A HREF="readline.html#IDX159">rl_begin_undo_group</A>
+<LI><A HREF="readline.html#IDX141">rl_bind_key</A>
+<LI><A HREF="readline.html#IDX142">rl_bind_key_in_map</A>
+<LI><A HREF="readline.html#IDX126">rl_binding_keymap</A>
+<LI><A HREF="readline.html#IDX209">rl_callback_handler_install</A>
+<LI><A HREF="readline.html#IDX211">rl_callback_handler_remove</A>
+<LI><A HREF="readline.html#IDX210">rl_callback_read_char</A>
+<LI><A HREF="readline.html#IDX212">rl_catch_signals</A>
+<LI><A HREF="readline.html#IDX213">rl_catch_sigwinch</A>
+<LI><A HREF="readline.html#IDX235">rl_char_is_quoted_p</A>
+<LI><A HREF="readline.html#IDX214">rl_cleanup_after_signal</A>
+<LI><A HREF="readline.html#IDX173">rl_clear_message</A>
+<LI><A HREF="readline.html#IDX187">rl_clear_pending_input</A>
+<LI><A HREF="readline.html#IDX221">rl_clear_signals</A>
+<LI><A HREF="readline.html#IDX222">rl_complete</A>, <A HREF="readline.html#IDX225">rl_complete</A>
+<LI><A HREF="readline.html#IDX224">rl_complete_internal</A>
+<LI><A HREF="readline.html#IDX240">rl_completer_quote_characters</A>
+<LI><A HREF="readline.html#IDX239">rl_completer_word_break_characters</A>
+<LI><A HREF="readline.html#IDX243">rl_completion_append_character</A>
+<LI><A HREF="readline.html#IDX252">rl_completion_display_matches_hook</A>
+<LI><A HREF="readline.html#IDX223">rl_completion_entry_function</A>, <A HREF="readline.html#IDX231">rl_completion_entry_function</A>
+<LI><A HREF="readline.html#IDX228">rl_completion_matches</A>
+<LI><A HREF="readline.html#IDX236">rl_completion_query_items</A>
+<LI><A HREF="readline.html#IDX248">rl_completion_type</A>
+<LI><A HREF="readline.html#IDX134">rl_copy_keymap</A>
+<LI><A HREF="readline.html#IDX180">rl_copy_text</A>
+<LI><A HREF="readline.html#IDX170">rl_crlf</A>
+<LI><A HREF="readline.html#IDX179">rl_delete_text</A>
+<LI><A HREF="readline.html#IDX124">rl_deprep_term_function</A>
+<LI><A HREF="readline.html#IDX190">rl_deprep_terminal</A>
+<LI><A HREF="readline.html#IDX195">rl_ding</A>
+<LI><A HREF="readline.html#IDX251">rl_directory_completion_hook</A>
+<LI><A HREF="readline.html#IDX136">rl_discard_keymap</A>
+<LI><A HREF="readline.html#IDX107">rl_dispatching</A>
+<LI><A HREF="readline.html#IDX197">rl_display_match_list</A>
+<LI><A HREF="readline.html#IDX163">rl_do_undo</A>
+<LI><A HREF="readline.html#IDX104">rl_done</A>
+<LI><A HREF="readline.html#IDX131">rl_editing_mode</A>
+<LI><A HREF="readline.html#IDX102">rl_end</A>
+<LI><A HREF="readline.html#IDX160">rl_end_undo_group</A>
+<LI><A HREF="readline.html#IDX108">rl_erase_empty_line</A>
+<LI><A HREF="readline.html#IDX120">rl_event_hook</A>
+<LI><A HREF="readline.html#IDX186">rl_execute_next</A>
+<LI><A HREF="readline.html#IDX125">rl_executing_keymap</A>
+<LI><A HREF="readline.html#IDX127">rl_executing_macro</A>
+<LI><A HREF="readline.html#IDX176">rl_expand_prompt</A>
+<LI><A HREF="readline.html#IDX129">rl_explicit_arg</A>
+<LI><A HREF="readline.html#IDX193">rl_extend_line_buffer</A>
+<LI><A HREF="readline.html#IDX245">rl_filename_completion_desired</A>
+<LI><A HREF="readline.html#IDX229">rl_filename_completion_function</A>
+<LI><A HREF="readline.html#IDX234">rl_filename_dequoting_function</A>
+<LI><A HREF="readline.html#IDX241">rl_filename_quote_characters</A>
+<LI><A HREF="readline.html#IDX246">rl_filename_quoting_desired</A>
+<LI><A HREF="readline.html#IDX233">rl_filename_quoting_function</A>
+<LI><A HREF="readline.html#IDX166">rl_forced_update_display</A>
+<LI><A HREF="readline.html#IDX215">rl_free_line_state</A>
+<LI><A HREF="readline.html#IDX162">rl_free_undo_list</A>
+<LI><A HREF="readline.html#IDX155">rl_function_dumper</A>
+<LI><A HREF="readline.html#IDX152">rl_function_of_keyseq</A>
+<LI><A HREF="readline.html#IDX157">rl_funmap_names</A>
+<LI><A HREF="readline.html#IDX148">rl_generic_bind</A>
+<LI><A HREF="readline.html#IDX137">rl_get_keymap</A>
+<LI><A HREF="readline.html#IDX139">rl_get_keymap_by_name</A>
+<LI><A HREF="readline.html#IDX140">rl_get_keymap_name</A>
+<LI><A HREF="readline.html#IDX219">rl_get_screen_size</A>
+<LI><A HREF="readline.html#IDX184">rl_getc</A>
+<LI><A HREF="readline.html#IDX121">rl_getc_function</A>
+<LI><A HREF="readline.html#IDX112">rl_gnu_readline_p</A>
+<LI><A HREF="readline.html#IDX244">rl_ignore_completion_duplicates</A>
+<LI><A HREF="readline.html#IDX250">rl_ignore_some_completions_function</A>
+<LI><A HREF="readline.html#IDX249">rl_inhibit_completion</A>
+<LI><A HREF="readline.html#IDX194">rl_initialize</A>
+<LI><A HREF="readline.html#IDX227">rl_insert_completions</A>
+<LI><A HREF="readline.html#IDX178">rl_insert_text</A>
+<LI><A HREF="readline.html#IDX115">rl_instream</A>
+<LI><A HREF="readline.html#IDX153">rl_invoking_keyseqs</A>
+<LI><A HREF="readline.html#IDX154">rl_invoking_keyseqs_in_map</A>
+<LI><A HREF="readline.html#IDX181">rl_kill_text</A>
+<LI><A HREF="readline.html#IDX117">rl_last_func</A>
+<LI><A HREF="readline.html#IDX111">rl_library_version</A>
+<LI><A HREF="readline.html#IDX100">rl_line_buffer</A>
+<LI><A HREF="readline.html#IDX156">rl_list_funmap_names</A>
+<LI><A HREF="readline.html#IDX204">rl_macro_bind</A>
+<LI><A HREF="readline.html#IDX205">rl_macro_dumper</A>
+<LI><A HREF="readline.html#IDX133">rl_make_bare_keymap</A>
+<LI><A HREF="readline.html#IDX135">rl_make_keymap</A>
+<LI><A HREF="readline.html#IDX103">rl_mark</A>
+<LI><A HREF="readline.html#IDX172">rl_message</A>
+<LI><A HREF="readline.html#IDX164">rl_modifying</A>
+<LI><A HREF="readline.html#IDX151">rl_named_function</A>
+<LI><A HREF="readline.html#IDX105">rl_num_chars_to_read</A>
+<LI><A HREF="readline.html#IDX130">rl_numeric_arg</A>
+<LI><A HREF="readline.html#IDX167">rl_on_new_line</A>
+<LI><A HREF="readline.html#IDX168">rl_on_new_line_with_prompt</A>
+<LI><A HREF="readline.html#IDX116">rl_outstream</A>
+<LI><A HREF="readline.html#IDX149">rl_parse_and_bind</A>
+<LI><A HREF="readline.html#IDX106">rl_pending_input</A>
+<LI><A HREF="readline.html#IDX101">rl_point</A>
+<LI><A HREF="readline.html#IDX226">rl_possible_completions</A>
+<LI><A HREF="readline.html#IDX119">rl_pre_input_hook</A>
+<LI><A HREF="readline.html#IDX123">rl_prep_term_function</A>
+<LI><A HREF="readline.html#IDX189">rl_prep_terminal</A>
+<LI><A HREF="readline.html#IDX109">rl_prompt</A>
+<LI><A HREF="readline.html#IDX182">rl_push_macro_input</A>
+<LI><A HREF="readline.html#IDX150">rl_read_init_file</A>
+<LI><A HREF="readline.html#IDX183">rl_read_key</A>
+<LI><A HREF="readline.html#IDX114">rl_readline_name</A>
+<LI><A HREF="readline.html#IDX128">rl_readline_state</A>
+<LI><A HREF="readline.html#IDX165">rl_redisplay</A>
+<LI><A HREF="readline.html#IDX122">rl_redisplay_function</A>
+<LI><A HREF="readline.html#IDX216">rl_reset_after_signal</A>
+<LI><A HREF="readline.html#IDX169">rl_reset_line_state</A>
+<LI><A HREF="readline.html#IDX192">rl_reset_terminal</A>
+<LI><A HREF="readline.html#IDX217">rl_resize_terminal</A>
+<LI><A HREF="readline.html#IDX175">rl_restore_prompt</A>
+<LI><A HREF="readline.html#IDX174">rl_save_prompt</A>
+<LI><A HREF="readline.html#IDX147">rl_set_key</A>
+<LI><A HREF="readline.html#IDX188">rl_set_keyboard_input_timeout</A>
+<LI><A HREF="readline.html#IDX138">rl_set_keymap</A>
+<LI><A HREF="readline.html#IDX208">rl_set_paren_blink_timeout</A>
+<LI><A HREF="readline.html#IDX177">rl_set_prompt</A>
+<LI><A HREF="readline.html#IDX218">rl_set_screen_size</A>
+<LI><A HREF="readline.html#IDX220">rl_set_signals</A>
+<LI><A HREF="readline.html#IDX171">rl_show_char</A>
+<LI><A HREF="readline.html#IDX242">rl_special_prefixes</A>
+<LI><A HREF="readline.html#IDX118">rl_startup_hook</A>
+<LI><A HREF="readline.html#IDX185">rl_stuff_char</A>
+<LI><A HREF="readline.html#IDX113">rl_terminal_name</A>
+<LI><A HREF="readline.html#IDX191">rl_tty_set_default_bindings</A>
+<LI><A HREF="readline.html#IDX146">rl_unbind_command_in_map</A>
+<LI><A HREF="readline.html#IDX145">rl_unbind_function_in_map</A>
+<LI><A HREF="readline.html#IDX143">rl_unbind_key</A>
+<LI><A HREF="readline.html#IDX144">rl_unbind_key_in_map</A>
+<LI><A HREF="readline.html#IDX230">rl_username_completion_function</A>
+<LI><A HREF="readline.html#IDX206">rl_variable_bind</A>
+<LI><A HREF="readline.html#IDX207">rl_variable_dumper</A>
+</DIR>
+<H2><A NAME="findex_s">s</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX53">self-insert (a, b, A, 1, !, ...)</A>
+<LI><A HREF="readline.html#IDX90">set-mark (C-@)</A>
+<LI><A HREF="readline.html#IDX25">show-all-if-ambiguous</A>
+<LI><A HREF="readline.html#IDX80">start-kbd-macro (C-x ()</A>
+</DIR>
+<H2><A NAME="findex_t">t</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX52">tab-insert (M-<KBD>TAB</KBD>)</A>
+<LI><A HREF="readline.html#IDX89">tilde-expand (M-~)</A>
+<LI><A HREF="readline.html#IDX54">transpose-chars (C-t)</A>
+<LI><A HREF="readline.html#IDX55">transpose-words (M-t)</A>
+</DIR>
+<H2><A NAME="findex_u">u</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX87">undo (C-_ or C-x C-u)</A>
+<LI><A HREF="readline.html#IDX74">universal-argument ()</A>
+<LI><A HREF="readline.html#IDX61">unix-line-discard (C-u)</A>
+<LI><A HREF="readline.html#IDX65">unix-word-rubout (C-w)</A>
+<LI><A HREF="readline.html#IDX56">upcase-word (M-u)</A>
+</DIR>
+<H2><A NAME="findex_v">v</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX26">visible-stats</A>
+</DIR>
+<H2><A NAME="findex_y">y</A></H2>
+<DIR>
+<LI><A HREF="readline.html#IDX71">yank (C-y)</A>
+<LI><A HREF="readline.html#IDX47">yank-last-arg (M-. or M-_)</A>
+<LI><A HREF="readline.html#IDX46">yank-nth-arg (M-C-y)</A>
+<LI><A HREF="readline.html#IDX72">yank-pop (M-y)</A>
+</DIR>
+
+</P>
+<P><HR><P>
+This document was generated on 16 April 2001 using the
+<A HREF="http://wwwinfo.cern.ch/dis/texi2html/">texi2html</A>
+translator version 1.52.</P>
+</BODY>
+</HTML>
diff --git a/readline-4.2/doc/readline.info b/readline-4.2/doc/readline.info
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+This is readline.info, produced by makeinfo version 4.0 from
+/usr/homes/chet/src/bash/readline-src/doc/rlman.texinfo.
+
+INFO-DIR-SECTION Libraries
+START-INFO-DIR-ENTRY
+* Readline: (readline). The GNU readline library API
+END-INFO-DIR-ENTRY
+
+ This document describes the GNU Readline Library, a utility which
+aids in the consistency of user interface across discrete programs that
+need to provide a command line interface.
+
+ Copyright (C) 1988-2001 Free Software Foundation, Inc.
+
+ Permission is granted to make and distribute verbatim copies of this
+manual provided the copyright notice and this permission notice pare
+preserved on all copies.
+
+ Permission is granted to copy and distribute modified versions of
+this manual under the conditions for verbatim copying, provided that
+the entire resulting derived work is distributed under the terms of a
+permission notice identical to this one.
+
+ Permission is granted to copy and distribute translations of this
+manual into another language, under the above conditions for modified
+versions, except that this permission notice may be stated in a
+translation approved by the Free Software Foundation.
+
+
+File: readline.info, Node: Top, Next: Command Line Editing, Up: (dir)
+
+GNU Readline Library
+********************
+
+ This document describes the GNU Readline Library, a utility which
+aids in the consistency of user interface across discrete programs that
+need to provide a command line interface.
+
+* Menu:
+
+* Command Line Editing:: GNU Readline User's Manual.
+* Programming with GNU Readline:: GNU Readline Programmer's Manual.
+* Concept Index:: Index of concepts described in this manual.
+* Function and Variable Index:: Index of externally visible functions
+ and variables.
+
+
+File: readline.info, Node: Command Line Editing, Next: Programming with GNU Readline, Prev: Top, Up: Top
+
+Command Line Editing
+********************
+
+ This chapter describes the basic features of the GNU command line
+editing interface.
+
+* Menu:
+
+* Introduction and Notation:: Notation used in this text.
+* Readline Interaction:: The minimum set of commands for editing a line.
+* Readline Init File:: Customizing Readline from a user's view.
+* Bindable Readline Commands:: A description of most of the Readline commands
+ available for binding
+* Readline vi Mode:: A short description of how to make Readline
+ behave like the vi editor.
+
+
+File: readline.info, Node: Introduction and Notation, Next: Readline Interaction, Up: Command Line Editing
+
+Introduction to Line Editing
+============================
+
+ The following paragraphs describe the notation used to represent
+keystrokes.
+
+ The text `C-k' is read as `Control-K' and describes the character
+produced when the <k> key is pressed while the Control key is depressed.
+
+ The text `M-k' is read as `Meta-K' and describes the character
+produced when the Meta key (if you have one) is depressed, and the <k>
+key is pressed. The Meta key is labeled <ALT> on many keyboards. On
+keyboards with two keys labeled <ALT> (usually to either side of the
+space bar), the <ALT> on the left side is generally set to work as a
+Meta key. The <ALT> key on the right may also be configured to work as
+a Meta key or may be configured as some other modifier, such as a
+Compose key for typing accented characters.
+
+ If you do not have a Meta or <ALT> key, or another key working as a
+Meta key, the identical keystroke can be generated by typing <ESC>
+_first_, and then typing <k>. Either process is known as "metafying"
+the <k> key.
+
+ The text `M-C-k' is read as `Meta-Control-k' and describes the
+character produced by "metafying" `C-k'.
+
+ In addition, several keys have their own names. Specifically,
+<DEL>, <ESC>, <LFD>, <SPC>, <RET>, and <TAB> all stand for themselves
+when seen in this text, or in an init file (*note Readline Init File::).
+If your keyboard lacks a <LFD> key, typing <C-j> will produce the
+desired character. The <RET> key may be labeled <Return> or <Enter> on
+some keyboards.
+
+
+File: readline.info, Node: Readline Interaction, Next: Readline Init File, Prev: Introduction and Notation, Up: Command Line Editing
+
+Readline Interaction
+====================
+
+ Often during an interactive session you type in a long line of text,
+only to notice that the first word on the line is misspelled. The
+Readline library gives you a set of commands for manipulating the text
+as you type it in, allowing you to just fix your typo, and not forcing
+you to retype the majority of the line. Using these editing commands,
+you move the cursor to the place that needs correction, and delete or
+insert the text of the corrections. Then, when you are satisfied with
+the line, you simply press <RET>. You do not have to be at the end of
+the line to press <RET>; the entire line is accepted regardless of the
+location of the cursor within the line.
+
+* Menu:
+
+* Readline Bare Essentials:: The least you need to know about Readline.
+* Readline Movement Commands:: Moving about the input line.
+* Readline Killing Commands:: How to delete text, and how to get it back!
+* Readline Arguments:: Giving numeric arguments to commands.
+* Searching:: Searching through previous lines.
+
+
+File: readline.info, Node: Readline Bare Essentials, Next: Readline Movement Commands, Up: Readline Interaction
+
+Readline Bare Essentials
+------------------------
+
+ In order to enter characters into the line, simply type them. The
+typed character appears where the cursor was, and then the cursor moves
+one space to the right. If you mistype a character, you can use your
+erase character to back up and delete the mistyped character.
+
+ Sometimes you may mistype a character, and not notice the error
+until you have typed several other characters. In that case, you can
+type `C-b' to move the cursor to the left, and then correct your
+mistake. Afterwards, you can move the cursor to the right with `C-f'.
+
+ When you add text in the middle of a line, you will notice that
+characters to the right of the cursor are `pushed over' to make room
+for the text that you have inserted. Likewise, when you delete text
+behind the cursor, characters to the right of the cursor are `pulled
+back' to fill in the blank space created by the removal of the text. A
+list of the bare essentials for editing the text of an input line
+follows.
+
+`C-b'
+ Move back one character.
+
+`C-f'
+ Move forward one character.
+
+<DEL> or <Backspace>
+ Delete the character to the left of the cursor.
+
+`C-d'
+ Delete the character underneath the cursor.
+
+Printing characters
+ Insert the character into the line at the cursor.
+
+`C-_' or `C-x C-u'
+ Undo the last editing command. You can undo all the way back to an
+ empty line.
+
+(Depending on your configuration, the <Backspace> key be set to delete
+the character to the left of the cursor and the <DEL> key set to delete
+the character underneath the cursor, like `C-d', rather than the
+character to the left of the cursor.)
+
+
+File: readline.info, Node: Readline Movement Commands, Next: Readline Killing Commands, Prev: Readline Bare Essentials, Up: Readline Interaction
+
+Readline Movement Commands
+--------------------------
+
+ The above table describes the most basic keystrokes that you need in
+order to do editing of the input line. For your convenience, many
+other commands have been added in addition to `C-b', `C-f', `C-d', and
+<DEL>. Here are some commands for moving more rapidly about the line.
+
+`C-a'
+ Move to the start of the line.
+
+`C-e'
+ Move to the end of the line.
+
+`M-f'
+ Move forward a word, where a word is composed of letters and
+ digits.
+
+`M-b'
+ Move backward a word.
+
+`C-l'
+ Clear the screen, reprinting the current line at the top.
+
+ Notice how `C-f' moves forward a character, while `M-f' moves
+forward a word. It is a loose convention that control keystrokes
+operate on characters while meta keystrokes operate on words.
+
+
+File: readline.info, Node: Readline Killing Commands, Next: Readline Arguments, Prev: Readline Movement Commands, Up: Readline Interaction
+
+Readline Killing Commands
+-------------------------
+
+ "Killing" text means to delete the text from the line, but to save
+it away for later use, usually by "yanking" (re-inserting) it back into
+the line. (`Cut' and `paste' are more recent jargon for `kill' and
+`yank'.)
+
+ If the description for a command says that it `kills' text, then you
+can be sure that you can get the text back in a different (or the same)
+place later.
+
+ When you use a kill command, the text is saved in a "kill-ring".
+Any number of consecutive kills save all of the killed text together, so
+that when you yank it back, you get it all. The kill ring is not line
+specific; the text that you killed on a previously typed line is
+available to be yanked back later, when you are typing another line.
+
+ Here is the list of commands for killing text.
+
+`C-k'
+ Kill the text from the current cursor position to the end of the
+ line.
+
+`M-d'
+ Kill from the cursor to the end of the current word, or, if between
+ words, to the end of the next word. Word boundaries are the same
+ as those used by `M-f'.
+
+`M-<DEL>'
+ Kill from the cursor the start of the previous word, or, if between
+ words, to the start of the previous word. Word boundaries are the
+ same as those used by `M-b'.
+
+`C-w'
+ Kill from the cursor to the previous whitespace. This is
+ different than `M-<DEL>' because the word boundaries differ.
+
+ Here is how to "yank" the text back into the line. Yanking means to
+copy the most-recently-killed text from the kill buffer.
+
+`C-y'
+ Yank the most recently killed text back into the buffer at the
+ cursor.
+
+`M-y'
+ Rotate the kill-ring, and yank the new top. You can only do this
+ if the prior command is `C-y' or `M-y'.
+
+
+File: readline.info, Node: Readline Arguments, Next: Searching, Prev: Readline Killing Commands, Up: Readline Interaction
+
+Readline Arguments
+------------------
+
+ You can pass numeric arguments to Readline commands. Sometimes the
+argument acts as a repeat count, other times it is the sign of the
+argument that is significant. If you pass a negative argument to a
+command which normally acts in a forward direction, that command will
+act in a backward direction. For example, to kill text back to the
+start of the line, you might type `M-- C-k'.
+
+ The general way to pass numeric arguments to a command is to type
+meta digits before the command. If the first `digit' typed is a minus
+sign (`-'), then the sign of the argument will be negative. Once you
+have typed one meta digit to get the argument started, you can type the
+remainder of the digits, and then the command. For example, to give
+the `C-d' command an argument of 10, you could type `M-1 0 C-d', which
+will delete the next ten characters on the input line.
+
+
+File: readline.info, Node: Searching, Prev: Readline Arguments, Up: Readline Interaction
+
+Searching for Commands in the History
+-------------------------------------
+
+ Readline provides commands for searching through the command history
+for lines containing a specified string. There are two search modes:
+"incremental" and "non-incremental".
+
+ Incremental searches begin before the user has finished typing the
+search string. As each character of the search string is typed,
+Readline displays the next entry from the history matching the string
+typed so far. An incremental search requires only as many characters
+as needed to find the desired history entry. To search backward in the
+history for a particular string, type `C-r'. Typing `C-s' searches
+forward through the history. The characters present in the value of
+the `isearch-terminators' variable are used to terminate an incremental
+search. If that variable has not been assigned a value, the <ESC> and
+`C-J' characters will terminate an incremental search. `C-g' will
+abort an incremental search and restore the original line. When the
+search is terminated, the history entry containing the search string
+becomes the current line.
+
+ To find other matching entries in the history list, type `C-r' or
+`C-s' as appropriate. This will search backward or forward in the
+history for the next entry matching the search string typed so far.
+Any other key sequence bound to a Readline command will terminate the
+search and execute that command. For instance, a <RET> will terminate
+the search and accept the line, thereby executing the command from the
+history list. A movement command will terminate the search, make the
+last line found the current line, and begin editing.
+
+ Non-incremental searches read the entire search string before
+starting to search for matching history lines. The search string may be
+typed by the user or be part of the contents of the current line.
+
+
+File: readline.info, Node: Readline Init File, Next: Bindable Readline Commands, Prev: Readline Interaction, Up: Command Line Editing
+
+Readline Init File
+==================
+
+ Although the Readline library comes with a set of Emacs-like
+keybindings installed by default, it is possible to use a different set
+of keybindings. Any user can customize programs that use Readline by
+putting commands in an "inputrc" file, conventionally in his home
+directory. The name of this file is taken from the value of the
+environment variable `INPUTRC'. If that variable is unset, the default
+is `~/.inputrc'.
+
+ When a program which uses the Readline library starts up, the init
+file is read, and the key bindings are set.
+
+ In addition, the `C-x C-r' command re-reads this init file, thus
+incorporating any changes that you might have made to it.
+
+* Menu:
+
+* Readline Init File Syntax:: Syntax for the commands in the inputrc file.
+
+* Conditional Init Constructs:: Conditional key bindings in the inputrc file.
+
+* Sample Init File:: An example inputrc file.
+
+
+File: readline.info, Node: Readline Init File Syntax, Next: Conditional Init Constructs, Up: Readline Init File
+
+Readline Init File Syntax
+-------------------------
+
+ There are only a few basic constructs allowed in the Readline init
+file. Blank lines are ignored. Lines beginning with a `#' are
+comments. Lines beginning with a `$' indicate conditional constructs
+(*note Conditional Init Constructs::). Other lines denote variable
+settings and key bindings.
+
+Variable Settings
+ You can modify the run-time behavior of Readline by altering the
+ values of variables in Readline using the `set' command within the
+ init file. The syntax is simple:
+
+ set VARIABLE VALUE
+
+ Here, for example, is how to change from the default Emacs-like
+ key binding to use `vi' line editing commands:
+
+ set editing-mode vi
+
+ Variable names and values, where appropriate, are recognized
+ without regard to case.
+
+ A great deal of run-time behavior is changeable with the following
+ variables.
+
+ `bell-style'
+ Controls what happens when Readline wants to ring the
+ terminal bell. If set to `none', Readline never rings the
+ bell. If set to `visible', Readline uses a visible bell if
+ one is available. If set to `audible' (the default),
+ Readline attempts to ring the terminal's bell.
+
+ `comment-begin'
+ The string to insert at the beginning of the line when the
+ `insert-comment' command is executed. The default value is
+ `"#"'.
+
+ `completion-ignore-case'
+ If set to `on', Readline performs filename matching and
+ completion in a case-insensitive fashion. The default value
+ is `off'.
+
+ `completion-query-items'
+ The number of possible completions that determines when the
+ user is asked whether he wants to see the list of
+ possibilities. If the number of possible completions is
+ greater than this value, Readline will ask the user whether
+ or not he wishes to view them; otherwise, they are simply
+ listed. This variable must be set to an integer value
+ greater than or equal to 0. The default limit is `100'.
+
+ `convert-meta'
+ If set to `on', Readline will convert characters with the
+ eighth bit set to an ASCII key sequence by stripping the
+ eighth bit and prefixing an <ESC> character, converting them
+ to a meta-prefixed key sequence. The default value is `on'.
+
+ `disable-completion'
+ If set to `On', Readline will inhibit word completion.
+ Completion characters will be inserted into the line as if
+ they had been mapped to `self-insert'. The default is `off'.
+
+ `editing-mode'
+ The `editing-mode' variable controls which default set of key
+ bindings is used. By default, Readline starts up in Emacs
+ editing mode, where the keystrokes are most similar to Emacs.
+ This variable can be set to either `emacs' or `vi'.
+
+ `enable-keypad'
+ When set to `on', Readline will try to enable the application
+ keypad when it is called. Some systems need this to enable
+ the arrow keys. The default is `off'.
+
+ `expand-tilde'
+ If set to `on', tilde expansion is performed when Readline
+ attempts word completion. The default is `off'.
+
+ `horizontal-scroll-mode'
+ This variable can be set to either `on' or `off'. Setting it
+ to `on' means that the text of the lines being edited will
+ scroll horizontally on a single screen line when they are
+ longer than the width of the screen, instead of wrapping onto
+ a new screen line. By default, this variable is set to `off'.
+
+ `input-meta'
+ If set to `on', Readline will enable eight-bit input (it will
+ not clear the eighth bit in the characters it reads),
+ regardless of what the terminal claims it can support. The
+ default value is `off'. The name `meta-flag' is a synonym
+ for this variable.
+
+ `isearch-terminators'
+ The string of characters that should terminate an incremental
+ search without subsequently executing the character as a
+ command (*note Searching::). If this variable has not been
+ given a value, the characters <ESC> and `C-J' will terminate
+ an incremental search.
+
+ `keymap'
+ Sets Readline's idea of the current keymap for key binding
+ commands. Acceptable `keymap' names are `emacs',
+ `emacs-standard', `emacs-meta', `emacs-ctlx', `vi', `vi-move',
+ `vi-command', and `vi-insert'. `vi' is equivalent to
+ `vi-command'; `emacs' is equivalent to `emacs-standard'. The
+ default value is `emacs'. The value of the `editing-mode'
+ variable also affects the default keymap.
+
+ `mark-directories'
+ If set to `on', completed directory names have a slash
+ appended. The default is `on'.
+
+ `mark-modified-lines'
+ This variable, when set to `on', causes Readline to display an
+ asterisk (`*') at the start of history lines which have been
+ modified. This variable is `off' by default.
+
+ `output-meta'
+ If set to `on', Readline will display characters with the
+ eighth bit set directly rather than as a meta-prefixed escape
+ sequence. The default is `off'.
+
+ `print-completions-horizontally'
+ If set to `on', Readline will display completions with matches
+ sorted horizontally in alphabetical order, rather than down
+ the screen. The default is `off'.
+
+ `show-all-if-ambiguous'
+ This alters the default behavior of the completion functions.
+ If set to `on', words which have more than one possible
+ completion cause the matches to be listed immediately instead
+ of ringing the bell. The default value is `off'.
+
+ `visible-stats'
+ If set to `on', a character denoting a file's type is
+ appended to the filename when listing possible completions.
+ The default is `off'.
+
+Key Bindings
+ The syntax for controlling key bindings in the init file is
+ simple. First you need to find the name of the command that you
+ want to change. The following sections contain tables of the
+ command name, the default keybinding, if any, and a short
+ description of what the command does.
+
+ Once you know the name of the command, simply place on a line in
+ the init file the name of the key you wish to bind the command to,
+ a colon, and then the name of the command. The name of the key
+ can be expressed in different ways, depending on what you find most
+ comfortable.
+
+ In addition to command names, readline allows keys to be bound to
+ a string that is inserted when the key is pressed (a MACRO).
+
+ KEYNAME: FUNCTION-NAME or MACRO
+ KEYNAME is the name of a key spelled out in English. For
+ example:
+ Control-u: universal-argument
+ Meta-Rubout: backward-kill-word
+ Control-o: "> output"
+
+ In the above example, `C-u' is bound to the function
+ `universal-argument', `M-DEL' is bound to the function
+ `backward-kill-word', and `C-o' is bound to run the macro
+ expressed on the right hand side (that is, to insert the text
+ `> output' into the line).
+
+ A number of symbolic character names are recognized while
+ processing this key binding syntax: DEL, ESC, ESCAPE, LFD,
+ NEWLINE, RET, RETURN, RUBOUT, SPACE, SPC, and TAB.
+
+ "KEYSEQ": FUNCTION-NAME or MACRO
+ KEYSEQ differs from KEYNAME above in that strings denoting an
+ entire key sequence can be specified, by placing the key
+ sequence in double quotes. Some GNU Emacs style key escapes
+ can be used, as in the following example, but the special
+ character names are not recognized.
+
+ "\C-u": universal-argument
+ "\C-x\C-r": re-read-init-file
+ "\e[11~": "Function Key 1"
+
+ In the above example, `C-u' is again bound to the function
+ `universal-argument' (just as it was in the first example),
+ `C-x C-r' is bound to the function `re-read-init-file', and
+ `<ESC> <[> <1> <1> <~>' is bound to insert the text `Function
+ Key 1'.
+
+ The following GNU Emacs style escape sequences are available when
+ specifying key sequences:
+
+ `\C-'
+ control prefix
+
+ `\M-'
+ meta prefix
+
+ `\e'
+ an escape character
+
+ `\\'
+ backslash
+
+ `\"'
+ <">, a double quotation mark
+
+ `\''
+ <'>, a single quote or apostrophe
+
+ In addition to the GNU Emacs style escape sequences, a second set
+ of backslash escapes is available:
+
+ `\a'
+ alert (bell)
+
+ `\b'
+ backspace
+
+ `\d'
+ delete
+
+ `\f'
+ form feed
+
+ `\n'
+ newline
+
+ `\r'
+ carriage return
+
+ `\t'
+ horizontal tab
+
+ `\v'
+ vertical tab
+
+ `\NNN'
+ the character whose ASCII code is the octal value NNN (one to
+ three digits)
+
+ `\xNNN'
+ the character whose ASCII code is the hexadecimal value NNN
+ (one to three digits)
+
+ When entering the text of a macro, single or double quotes must be
+ used to indicate a macro definition. Unquoted text is assumed to
+ be a function name. In the macro body, the backslash escapes
+ described above are expanded. Backslash will quote any other
+ character in the macro text, including `"' and `''. For example,
+ the following binding will make `C-x \' insert a single `\' into
+ the line:
+ "\C-x\\": "\\"
+
+
+File: readline.info, Node: Conditional Init Constructs, Next: Sample Init File, Prev: Readline Init File Syntax, Up: Readline Init File
+
+Conditional Init Constructs
+---------------------------
+
+ Readline implements a facility similar in spirit to the conditional
+compilation features of the C preprocessor which allows key bindings
+and variable settings to be performed as the result of tests. There
+are four parser directives used.
+
+`$if'
+ The `$if' construct allows bindings to be made based on the
+ editing mode, the terminal being used, or the application using
+ Readline. The text of the test extends to the end of the line; no
+ characters are required to isolate it.
+
+ `mode'
+ The `mode=' form of the `$if' directive is used to test
+ whether Readline is in `emacs' or `vi' mode. This may be
+ used in conjunction with the `set keymap' command, for
+ instance, to set bindings in the `emacs-standard' and
+ `emacs-ctlx' keymaps only if Readline is starting out in
+ `emacs' mode.
+
+ `term'
+ The `term=' form may be used to include terminal-specific key
+ bindings, perhaps to bind the key sequences output by the
+ terminal's function keys. The word on the right side of the
+ `=' is tested against both the full name of the terminal and
+ the portion of the terminal name before the first `-'. This
+ allows `sun' to match both `sun' and `sun-cmd', for instance.
+
+ `application'
+ The APPLICATION construct is used to include
+ application-specific settings. Each program using the
+ Readline library sets the APPLICATION NAME, and you can test
+ for a particular value. This could be used to bind key
+ sequences to functions useful for a specific program. For
+ instance, the following command adds a key sequence that
+ quotes the current or previous word in Bash:
+ $if Bash
+ # Quote the current or previous word
+ "\C-xq": "\eb\"\ef\""
+ $endif
+
+`$endif'
+ This command, as seen in the previous example, terminates an `$if'
+ command.
+
+`$else'
+ Commands in this branch of the `$if' directive are executed if the
+ test fails.
+
+`$include'
+ This directive takes a single filename as an argument and reads
+ commands and bindings from that file. For example, the following
+ directive reads from `/etc/inputrc':
+ $include /etc/inputrc
+
+
+File: readline.info, Node: Sample Init File, Prev: Conditional Init Constructs, Up: Readline Init File
+
+Sample Init File
+----------------
+
+ Here is an example of an INPUTRC file. This illustrates key
+binding, variable assignment, and conditional syntax.
+
+
+ # This file controls the behaviour of line input editing for
+ # programs that use the Gnu Readline library. Existing programs
+ # include FTP, Bash, and Gdb.
+ #
+ # You can re-read the inputrc file with C-x C-r.
+ # Lines beginning with '#' are comments.
+ #
+ # First, include any systemwide bindings and variable assignments from
+ # /etc/Inputrc
+ $include /etc/Inputrc
+
+ #
+ # Set various bindings for emacs mode.
+
+ set editing-mode emacs
+
+ $if mode=emacs
+
+ Meta-Control-h: backward-kill-word Text after the function name is ignored
+
+ #
+ # Arrow keys in keypad mode
+ #
+ #"\M-OD": backward-char
+ #"\M-OC": forward-char
+ #"\M-OA": previous-history
+ #"\M-OB": next-history
+ #
+ # Arrow keys in ANSI mode
+ #
+ "\M-[D": backward-char
+ "\M-[C": forward-char
+ "\M-[A": previous-history
+ "\M-[B": next-history
+ #
+ # Arrow keys in 8 bit keypad mode
+ #
+ #"\M-\C-OD": backward-char
+ #"\M-\C-OC": forward-char
+ #"\M-\C-OA": previous-history
+ #"\M-\C-OB": next-history
+ #
+ # Arrow keys in 8 bit ANSI mode
+ #
+ #"\M-\C-[D": backward-char
+ #"\M-\C-[C": forward-char
+ #"\M-\C-[A": previous-history
+ #"\M-\C-[B": next-history
+
+ C-q: quoted-insert
+
+ $endif
+
+ # An old-style binding. This happens to be the default.
+ TAB: complete
+
+ # Macros that are convenient for shell interaction
+ $if Bash
+ # edit the path
+ "\C-xp": "PATH=${PATH}\e\C-e\C-a\ef\C-f"
+ # prepare to type a quoted word -- insert open and close double quotes
+ # and move to just after the open quote
+ "\C-x\"": "\"\"\C-b"
+ # insert a backslash (testing backslash escapes in sequences and macros)
+ "\C-x\\": "\\"
+ # Quote the current or previous word
+ "\C-xq": "\eb\"\ef\""
+ # Add a binding to refresh the line, which is unbound
+ "\C-xr": redraw-current-line
+ # Edit variable on current line.
+ "\M-\C-v": "\C-a\C-k$\C-y\M-\C-e\C-a\C-y="
+ $endif
+
+ # use a visible bell if one is available
+ set bell-style visible
+
+ # don't strip characters to 7 bits when reading
+ set input-meta on
+
+ # allow iso-latin1 characters to be inserted rather than converted to
+ # prefix-meta sequences
+ set convert-meta off
+
+ # display characters with the eighth bit set directly rather than
+ # as meta-prefixed characters
+ set output-meta on
+
+ # if there are more than 150 possible completions for a word, ask the
+ # user if he wants to see all of them
+ set completion-query-items 150
+
+ # For FTP
+ $if Ftp
+ "\C-xg": "get \M-?"
+ "\C-xt": "put \M-?"
+ "\M-.": yank-last-arg
+ $endif
+
+
+File: readline.info, Node: Bindable Readline Commands, Next: Readline vi Mode, Prev: Readline Init File, Up: Command Line Editing
+
+Bindable Readline Commands
+==========================
+
+* Menu:
+
+* Commands For Moving:: Moving about the line.
+* Commands For History:: Getting at previous lines.
+* Commands For Text:: Commands for changing text.
+* Commands For Killing:: Commands for killing and yanking.
+* Numeric Arguments:: Specifying numeric arguments, repeat counts.
+* Commands For Completion:: Getting Readline to do the typing for you.
+* Keyboard Macros:: Saving and re-executing typed characters
+* Miscellaneous Commands:: Other miscellaneous commands.
+
+ This section describes Readline commands that may be bound to key
+sequences. Command names without an accompanying key sequence are
+unbound by default.
+
+ In the following descriptions, "point" refers to the current cursor
+position, and "mark" refers to a cursor position saved by the
+`set-mark' command. The text between the point and mark is referred to
+as the "region".
+
+
+File: readline.info, Node: Commands For Moving, Next: Commands For History, Up: Bindable Readline Commands
+
+Commands For Moving
+-------------------
+
+`beginning-of-line (C-a)'
+ Move to the start of the current line.
+
+`end-of-line (C-e)'
+ Move to the end of the line.
+
+`forward-char (C-f)'
+ Move forward a character.
+
+`backward-char (C-b)'
+ Move back a character.
+
+`forward-word (M-f)'
+ Move forward to the end of the next word. Words are composed of
+ letters and digits.
+
+`backward-word (M-b)'
+ Move back to the start of the current or previous word. Words are
+ composed of letters and digits.
+
+`clear-screen (C-l)'
+ Clear the screen and redraw the current line, leaving the current
+ line at the top of the screen.
+
+`redraw-current-line ()'
+ Refresh the current line. By default, this is unbound.
+
+
+File: readline.info, Node: Commands For History, Next: Commands For Text, Prev: Commands For Moving, Up: Bindable Readline Commands
+
+Commands For Manipulating The History
+-------------------------------------
+
+`accept-line (Newline or Return)'
+ Accept the line regardless of where the cursor is. If this line is
+ non-empty, it may be added to the history list for future recall
+ with `add_history()'. If this line is a modified history line,
+ the history line is restored to its original state.
+
+`previous-history (C-p)'
+ Move `back' through the history list, fetching the previous
+ command.
+
+`next-history (C-n)'
+ Move `forward' through the history list, fetching the next command.
+
+`beginning-of-history (M-<)'
+ Move to the first line in the history.
+
+`end-of-history (M->)'
+ Move to the end of the input history, i.e., the line currently
+ being entered.
+
+`reverse-search-history (C-r)'
+ Search backward starting at the current line and moving `up'
+ through the history as necessary. This is an incremental search.
+
+`forward-search-history (C-s)'
+ Search forward starting at the current line and moving `down'
+ through the the history as necessary. This is an incremental
+ search.
+
+`non-incremental-reverse-search-history (M-p)'
+ Search backward starting at the current line and moving `up'
+ through the history as necessary using a non-incremental search
+ for a string supplied by the user.
+
+`non-incremental-forward-search-history (M-n)'
+ Search forward starting at the current line and moving `down'
+ through the the history as necessary using a non-incremental search
+ for a string supplied by the user.
+
+`history-search-forward ()'
+ Search forward through the history for the string of characters
+ between the start of the current line and the point. This is a
+ non-incremental search. By default, this command is unbound.
+
+`history-search-backward ()'
+ Search backward through the history for the string of characters
+ between the start of the current line and the point. This is a
+ non-incremental search. By default, this command is unbound.
+
+`yank-nth-arg (M-C-y)'
+ Insert the first argument to the previous command (usually the
+ second word on the previous line) at point. With an argument N,
+ insert the Nth word from the previous command (the words in the
+ previous command begin with word 0). A negative argument inserts
+ the Nth word from the end of the previous command.
+
+`yank-last-arg (M-. or M-_)'
+ Insert last argument to the previous command (the last word of the
+ previous history entry). With an argument, behave exactly like
+ `yank-nth-arg'. Successive calls to `yank-last-arg' move back
+ through the history list, inserting the last argument of each line
+ in turn.
+
+
+File: readline.info, Node: Commands For Text, Next: Commands For Killing, Prev: Commands For History, Up: Bindable Readline Commands
+
+Commands For Changing Text
+--------------------------
+
+`delete-char (C-d)'
+ Delete the character at point. If point is at the beginning of
+ the line, there are no characters in the line, and the last
+ character typed was not bound to `delete-char', then return EOF.
+
+`backward-delete-char (Rubout)'
+ Delete the character behind the cursor. A numeric argument means
+ to kill the characters instead of deleting them.
+
+`forward-backward-delete-char ()'
+ Delete the character under the cursor, unless the cursor is at the
+ end of the line, in which case the character behind the cursor is
+ deleted. By default, this is not bound to a key.
+
+`quoted-insert (C-q or C-v)'
+ Add the next character typed to the line verbatim. This is how to
+ insert key sequences like `C-q', for example.
+
+`tab-insert (M-<TAB>)'
+ Insert a tab character.
+
+`self-insert (a, b, A, 1, !, ...)'
+ Insert yourself.
+
+`transpose-chars (C-t)'
+ Drag the character before the cursor forward over the character at
+ the cursor, moving the cursor forward as well. If the insertion
+ point is at the end of the line, then this transposes the last two
+ characters of the line. Negative arguments have no effect.
+
+`transpose-words (M-t)'
+ Drag the word before point past the word after point, moving point
+ past that word as well.
+
+`upcase-word (M-u)'
+ Uppercase the current (or following) word. With a negative
+ argument, uppercase the previous word, but do not move the cursor.
+
+`downcase-word (M-l)'
+ Lowercase the current (or following) word. With a negative
+ argument, lowercase the previous word, but do not move the cursor.
+
+`capitalize-word (M-c)'
+ Capitalize the current (or following) word. With a negative
+ argument, capitalize the previous word, but do not move the cursor.
+
+
+File: readline.info, Node: Commands For Killing, Next: Numeric Arguments, Prev: Commands For Text, Up: Bindable Readline Commands
+
+Killing And Yanking
+-------------------
+
+`kill-line (C-k)'
+ Kill the text from point to the end of the line.
+
+`backward-kill-line (C-x Rubout)'
+ Kill backward to the beginning of the line.
+
+`unix-line-discard (C-u)'
+ Kill backward from the cursor to the beginning of the current line.
+
+`kill-whole-line ()'
+ Kill all characters on the current line, no matter where point is.
+ By default, this is unbound.
+
+`kill-word (M-d)'
+ Kill from point to the end of the current word, or if between
+ words, to the end of the next word. Word boundaries are the same
+ as `forward-word'.
+
+`backward-kill-word (M-<DEL>)'
+ Kill the word behind point. Word boundaries are the same as
+ `backward-word'.
+
+`unix-word-rubout (C-w)'
+ Kill the word behind point, using white space as a word boundary.
+ The killed text is saved on the kill-ring.
+
+`delete-horizontal-space ()'
+ Delete all spaces and tabs around point. By default, this is
+ unbound.
+
+`kill-region ()'
+ Kill the text in the current region. By default, this command is
+ unbound.
+
+`copy-region-as-kill ()'
+ Copy the text in the region to the kill buffer, so it can be yanked
+ right away. By default, this command is unbound.
+
+`copy-backward-word ()'
+ Copy the word before point to the kill buffer. The word
+ boundaries are the same as `backward-word'. By default, this
+ command is unbound.
+
+`copy-forward-word ()'
+ Copy the word following point to the kill buffer. The word
+ boundaries are the same as `forward-word'. By default, this
+ command is unbound.
+
+`yank (C-y)'
+ Yank the top of the kill ring into the buffer at point.
+
+`yank-pop (M-y)'
+ Rotate the kill-ring, and yank the new top. You can only do this
+ if the prior command is `yank' or `yank-pop'.
+
+
+File: readline.info, Node: Numeric Arguments, Next: Commands For Completion, Prev: Commands For Killing, Up: Bindable Readline Commands
+
+Specifying Numeric Arguments
+----------------------------
+
+`digit-argument (M-0, M-1, ... M--)'
+ Add this digit to the argument already accumulating, or start a new
+ argument. `M--' starts a negative argument.
+
+`universal-argument ()'
+ This is another way to specify an argument. If this command is
+ followed by one or more digits, optionally with a leading minus
+ sign, those digits define the argument. If the command is
+ followed by digits, executing `universal-argument' again ends the
+ numeric argument, but is otherwise ignored. As a special case, if
+ this command is immediately followed by a character that is
+ neither a digit or minus sign, the argument count for the next
+ command is multiplied by four. The argument count is initially
+ one, so executing this function the first time makes the argument
+ count four, a second time makes the argument count sixteen, and so
+ on. By default, this is not bound to a key.
+
+
+File: readline.info, Node: Commands For Completion, Next: Keyboard Macros, Prev: Numeric Arguments, Up: Bindable Readline Commands
+
+Letting Readline Type For You
+-----------------------------
+
+`complete (<TAB>)'
+ Attempt to perform completion on the text before point. The
+ actual completion performed is application-specific. The default
+ is filename completion.
+
+`possible-completions (M-?)'
+ List the possible completions of the text before point.
+
+`insert-completions (M-*)'
+ Insert all completions of the text before point that would have
+ been generated by `possible-completions'.
+
+`menu-complete ()'
+ Similar to `complete', but replaces the word to be completed with
+ a single match from the list of possible completions. Repeated
+ execution of `menu-complete' steps through the list of possible
+ completions, inserting each match in turn. At the end of the list
+ of completions, the bell is rung (subject to the setting of
+ `bell-style') and the original text is restored. An argument of N
+ moves N positions forward in the list of matches; a negative
+ argument may be used to move backward through the list. This
+ command is intended to be bound to <TAB>, but is unbound by
+ default.
+
+`delete-char-or-list ()'
+ Deletes the character under the cursor if not at the beginning or
+ end of the line (like `delete-char'). If at the end of the line,
+ behaves identically to `possible-completions'. This command is
+ unbound by default.
+
+
+File: readline.info, Node: Keyboard Macros, Next: Miscellaneous Commands, Prev: Commands For Completion, Up: Bindable Readline Commands
+
+Keyboard Macros
+---------------
+
+`start-kbd-macro (C-x ()'
+ Begin saving the characters typed into the current keyboard macro.
+
+`end-kbd-macro (C-x ))'
+ Stop saving the characters typed into the current keyboard macro
+ and save the definition.
+
+`call-last-kbd-macro (C-x e)'
+ Re-execute the last keyboard macro defined, by making the
+ characters in the macro appear as if typed at the keyboard.
+
+
+File: readline.info, Node: Miscellaneous Commands, Prev: Keyboard Macros, Up: Bindable Readline Commands
+
+Some Miscellaneous Commands
+---------------------------
+
+`re-read-init-file (C-x C-r)'
+ Read in the contents of the INPUTRC file, and incorporate any
+ bindings or variable assignments found there.
+
+`abort (C-g)'
+ Abort the current editing command and ring the terminal's bell
+ (subject to the setting of `bell-style').
+
+`do-uppercase-version (M-a, M-b, M-X, ...)'
+ If the metafied character X is lowercase, run the command that is
+ bound to the corresponding uppercase character.
+
+`prefix-meta (<ESC>)'
+ Metafy the next character typed. This is for keyboards without a
+ meta key. Typing `<ESC> f' is equivalent to typing `M-f'.
+
+`undo (C-_ or C-x C-u)'
+ Incremental undo, separately remembered for each line.
+
+`revert-line (M-r)'
+ Undo all changes made to this line. This is like executing the
+ `undo' command enough times to get back to the beginning.
+
+`tilde-expand (M-~)'
+ Perform tilde expansion on the current word.
+
+`set-mark (C-@)'
+ Set the mark to the point. If a numeric argument is supplied, the
+ mark is set to that position.
+
+`exchange-point-and-mark (C-x C-x)'
+ Swap the point with the mark. The current cursor position is set
+ to the saved position, and the old cursor position is saved as the
+ mark.
+
+`character-search (C-])'
+ A character is read and point is moved to the next occurrence of
+ that character. A negative count searches for previous
+ occurrences.
+
+`character-search-backward (M-C-])'
+ A character is read and point is moved to the previous occurrence
+ of that character. A negative count searches for subsequent
+ occurrences.
+
+`insert-comment (M-#)'
+ The value of the `comment-begin' variable is inserted at the
+ beginning of the current line, and the line is accepted as if a
+ newline had been typed.
+
+`dump-functions ()'
+ Print all of the functions and their key bindings to the Readline
+ output stream. If a numeric argument is supplied, the output is
+ formatted in such a way that it can be made part of an INPUTRC
+ file. This command is unbound by default.
+
+`dump-variables ()'
+ Print all of the settable variables and their values to the
+ Readline output stream. If a numeric argument is supplied, the
+ output is formatted in such a way that it can be made part of an
+ INPUTRC file. This command is unbound by default.
+
+`dump-macros ()'
+ Print all of the Readline key sequences bound to macros and the
+ strings they output. If a numeric argument is supplied, the
+ output is formatted in such a way that it can be made part of an
+ INPUTRC file. This command is unbound by default.
+
+
+File: readline.info, Node: Readline vi Mode, Prev: Bindable Readline Commands, Up: Command Line Editing
+
+Readline vi Mode
+================
+
+ While the Readline library does not have a full set of `vi' editing
+functions, it does contain enough to allow simple editing of the line.
+The Readline `vi' mode behaves as specified in the POSIX 1003.2
+standard.
+
+ In order to switch interactively between `emacs' and `vi' editing
+modes, use the command `M-C-j' (bound to emacs-editing-mode when in
+`vi' mode and to vi-editing-mode in `emacs' mode). The Readline
+default is `emacs' mode.
+
+ When you enter a line in `vi' mode, you are already placed in
+`insertion' mode, as if you had typed an `i'. Pressing <ESC> switches
+you into `command' mode, where you can edit the text of the line with
+the standard `vi' movement keys, move to previous history lines with
+`k' and subsequent lines with `j', and so forth.
+
+ This document describes the GNU Readline Library, a utility for
+aiding in the consitency of user interface across discrete programs
+that need to provide a command line interface.
+
+ Copyright (C) 1988-2001 Free Software Foundation, Inc.
+
+ Permission is granted to make and distribute verbatim copies of this
+manual provided the copyright notice and this permission notice pare
+preserved on all copies.
+
+ Permission is granted to copy and distribute modified versions of
+this manual under the conditions for verbatim copying, provided that
+the entire resulting derived work is distributed under the terms of a
+permission notice identical to this one.
+
+ Permission is granted to copy and distribute translations of this
+manual into another language, under the above conditions for modified
+versions, except that this permission notice may be stated in a
+translation approved by the Foundation.
+
+
+File: readline.info, Node: Programming with GNU Readline, Next: Concept Index, Prev: Command Line Editing, Up: Top
+
+Programming with GNU Readline
+*****************************
+
+ This chapter describes the interface between the GNU Readline
+Library and other programs. If you are a programmer, and you wish to
+include the features found in GNU Readline such as completion, line
+editing, and interactive history manipulation in your own programs,
+this section is for you.
+
+* Menu:
+
+* Basic Behavior:: Using the default behavior of Readline.
+* Custom Functions:: Adding your own functions to Readline.
+* Readline Variables:: Variables accessible to custom
+ functions.
+* Readline Convenience Functions:: Functions which Readline supplies to
+ aid in writing your own custom
+ functions.
+* Readline Signal Handling:: How Readline behaves when it receives signals.
+* Custom Completers:: Supplanting or supplementing Readline's
+ completion functions.
+
+
+File: readline.info, Node: Basic Behavior, Next: Custom Functions, Up: Programming with GNU Readline
+
+Basic Behavior
+==============
+
+ Many programs provide a command line interface, such as `mail',
+`ftp', and `sh'. For such programs, the default behaviour of Readline
+is sufficient. This section describes how to use Readline in the
+simplest way possible, perhaps to replace calls in your code to
+`gets()' or `fgets()'.
+
+ The function `readline()' prints a prompt PROMPT and then reads and
+returns a single line of text from the user. If PROMPT is `NULL' or
+the empty string, no prompt is displayed. The line `readline' returns
+is allocated with `malloc()'; the caller should `free()' the line when
+it has finished with it. The declaration for `readline' in ANSI C is
+
+ `char *readline (const char *PROMPT);'
+
+So, one might say
+ `char *line = readline ("Enter a line: ");'
+
+in order to read a line of text from the user. The line returned has
+the final newline removed, so only the text remains.
+
+ If `readline' encounters an `EOF' while reading the line, and the
+line is empty at that point, then `(char *)NULL' is returned.
+Otherwise, the line is ended just as if a newline had been typed.
+
+ If you want the user to be able to get at the line later, (with
+<C-p> for example), you must call `add_history()' to save the line away
+in a "history" list of such lines.
+
+ `add_history (line)';
+
+For full details on the GNU History Library, see the associated manual.
+
+ It is preferable to avoid saving empty lines on the history list,
+since users rarely have a burning need to reuse a blank line. Here is
+a function which usefully replaces the standard `gets()' library
+function, and has the advantage of no static buffer to overflow:
+
+ /* A static variable for holding the line. */
+ static char *line_read = (char *)NULL;
+
+ /* Read a string, and return a pointer to it. Returns NULL on EOF. */
+ char *
+ rl_gets ()
+ {
+ /* If the buffer has already been allocated, return the memory
+ to the free pool. */
+ if (line_read)
+ {
+ free (line_read);
+ line_read = (char *)NULL;
+ }
+
+ /* Get a line from the user. */
+ line_read = readline ("");
+
+ /* If the line has any text in it, save it on the history. */
+ if (line_read && *line_read)
+ add_history (line_read);
+
+ return (line_read);
+ }
+
+ This function gives the user the default behaviour of <TAB>
+completion: completion on file names. If you do not want Readline to
+complete on filenames, you can change the binding of the <TAB> key with
+`rl_bind_key()'.
+
+ `int rl_bind_key (int KEY, rl_command_func_t *FUNCTION);'
+
+ `rl_bind_key()' takes two arguments: KEY is the character that you
+want to bind, and FUNCTION is the address of the function to call when
+KEY is pressed. Binding <TAB> to `rl_insert()' makes <TAB> insert
+itself. `rl_bind_key()' returns non-zero if KEY is not a valid ASCII
+character code (between 0 and 255).
+
+ Thus, to disable the default <TAB> behavior, the following suffices:
+ `rl_bind_key ('\t', rl_insert);'
+
+ This code should be executed once at the start of your program; you
+might write a function called `initialize_readline()' which performs
+this and other desired initializations, such as installing custom
+completers (*note Custom Completers::).
+
+
+File: readline.info, Node: Custom Functions, Next: Readline Variables, Prev: Basic Behavior, Up: Programming with GNU Readline
+
+Custom Functions
+================
+
+ Readline provides many functions for manipulating the text of the
+line, but it isn't possible to anticipate the needs of all programs.
+This section describes the various functions and variables defined
+within the Readline library which allow a user program to add
+customized functionality to Readline.
+
+ Before declaring any functions that customize Readline's behavior, or
+using any functionality Readline provides in other code, an application
+writer should include the file `<readline/readline.h>' in any file that
+uses Readline's features. Since some of the definitions in
+`readline.h' use the `stdio' library, the file `<stdio.h>' should be
+included before `readline.h'.
+
+* Menu:
+
+* Readline Typedefs:: C declarations to make code readable.
+* Function Writing:: Variables and calling conventions.
+
+
+File: readline.info, Node: Readline Typedefs, Next: Function Writing, Up: Custom Functions
+
+Readline Typedefs
+-----------------
+
+ For readabilty, we declare a number of new object types, all pointers
+to functions.
+
+ The reason for declaring these new types is to make it easier to
+write code describing pointers to C functions with appropriately
+prototyped arguments and return values.
+
+ For instance, say we want to declare a variable FUNC as a pointer to
+a function which takes two `int' arguments and returns an `int' (this
+is the type of all of the Readline bindable functions). Instead of the
+classic C declaration
+
+ `int (*func)();'
+
+or the ANSI-C style declaration
+
+ `int (*func)(int, int);'
+
+we may write
+
+ `rl_command_func_t *func;'
+
+ The full list of function pointer types available is
+
+`typedef int rl_command_func_t (int, int);'
+
+`typedef char *rl_compentry_func_t (const char *, int);'
+
+`typedef char **rl_completion_func_t (const char *, int, int);'
+
+`typedef char *rl_quote_func_t (char *, int, char *);'
+
+`typedef char *rl_dequote_func_t (char *, int);'
+
+`typedef int rl_compignore_func_t (char **);'
+
+`typedef void rl_compdisp_func_t (char **, int, int);'
+
+`typedef int rl_hook_func_t (void);'
+
+`typedef int rl_getc_func_t (FILE *);'
+
+`typedef int rl_linebuf_func_t (char *, int);'
+
+`typedef int rl_intfunc_t (int);'
+
+`#define rl_ivoidfunc_t rl_hook_func_t'
+
+`typedef int rl_icpfunc_t (char *);'
+
+`typedef int rl_icppfunc_t (char **);'
+
+`typedef void rl_voidfunc_t (void);'
+
+`typedef void rl_vintfunc_t (int);'
+
+`typedef void rl_vcpfunc_t (char *);'
+
+`typedef void rl_vcppfunc_t (char **);'
+
+File: readline.info, Node: Function Writing, Prev: Readline Typedefs, Up: Custom Functions
+
+Writing a New Function
+----------------------
+
+ In order to write new functions for Readline, you need to know the
+calling conventions for keyboard-invoked functions, and the names of the
+variables that describe the current state of the line read so far.
+
+ The calling sequence for a command `foo' looks like
+
+ `foo (int count, int key)'
+
+where COUNT is the numeric argument (or 1 if defaulted) and KEY is the
+key that invoked this function.
+
+ It is completely up to the function as to what should be done with
+the numeric argument. Some functions use it as a repeat count, some as
+a flag, and others to choose alternate behavior (refreshing the current
+line as opposed to refreshing the screen, for example). Some choose to
+ignore it. In general, if a function uses the numeric argument as a
+repeat count, it should be able to do something useful with both
+negative and positive arguments. At the very least, it should be aware
+that it can be passed a negative argument.
+
+
+File: readline.info, Node: Readline Variables, Next: Readline Convenience Functions, Prev: Custom Functions, Up: Programming with GNU Readline
+
+Readline Variables
+==================
+
+ These variables are available to function writers.
+
+ - Variable: char * rl_line_buffer
+ This is the line gathered so far. You are welcome to modify the
+ contents of the line, but see *Note Allowing Undoing::. The
+ function `rl_extend_line_buffer' is available to increase the
+ memory allocated to `rl_line_buffer'.
+
+ - Variable: int rl_point
+ The offset of the current cursor position in `rl_line_buffer' (the
+ _point_).
+
+ - Variable: int rl_end
+ The number of characters present in `rl_line_buffer'. When
+ `rl_point' is at the end of the line, `rl_point' and `rl_end' are
+ equal.
+
+ - Variable: int rl_mark
+ The MARK (saved position) in the current line. If set, the mark
+ and point define a _region_.
+
+ - Variable: int rl_done
+ Setting this to a non-zero value causes Readline to return the
+ current line immediately.
+
+ - Variable: int rl_num_chars_to_read
+ Setting this to a positive value before calling `readline()' causes
+ Readline to return after accepting that many characters, rather
+ than reading up to a character bound to `accept-line'.
+
+ - Variable: int rl_pending_input
+ Setting this to a value makes it the next keystroke read. This is
+ a way to stuff a single character into the input stream.
+
+ - Variable: int rl_dispatching
+ Set to a non-zero value if a function is being called from a key
+ binding; zero otherwise. Application functions can test this to
+ discover whether they were called directly or by Readline's
+ dispatching mechanism.
+
+ - Variable: int rl_erase_empty_line
+ Setting this to a non-zero value causes Readline to completely
+ erase the current line, including any prompt, any time a newline
+ is typed as the only character on an otherwise-empty line. The
+ cursor is moved to the beginning of the newly-blank line.
+
+ - Variable: char * rl_prompt
+ The prompt Readline uses. This is set from the argument to
+ `readline()', and should not be assigned to directly. The
+ `rl_set_prompt()' function (*note Redisplay::) may be used to
+ modify the prompt string after calling `readline()'.
+
+ - Variable: int rl_already_prompted
+ If an application wishes to display the prompt itself, rather than
+ have Readline do it the first time `readline()' is called, it
+ should set this variable to a non-zero value after displaying the
+ prompt. The prompt must also be passed as the argument to
+ `readline()' so the redisplay functions can update the display
+ properly. The calling application is responsible for managing the
+ value; Readline never sets it.
+
+ - Variable: const char * rl_library_version
+ The version number of this revision of the library.
+
+ - Variable: int rl_gnu_readline_p
+ Always set to 1, denoting that this is GNU readline rather than
+ some emulation.
+
+ - Variable: const char * rl_terminal_name
+ The terminal type, used for initialization. If not set by the
+ application, Readline sets this to the value of the `TERM'
+ environment variable the first time it is called.
+
+ - Variable: const char * rl_readline_name
+ This variable is set to a unique name by each application using
+ Readline. The value allows conditional parsing of the inputrc file
+ (*note Conditional Init Constructs::).
+
+ - Variable: FILE * rl_instream
+ The stdio stream from which Readline reads input.
+
+ - Variable: FILE * rl_outstream
+ The stdio stream to which Readline performs output.
+
+ - Variable: rl_command_func_t * rl_last_func
+ The address of the last command function Readline executed. May
+ be used to test whether or not a function is being executed twice
+ in succession, for example.
+
+ - Variable: rl_hook_func_t * rl_startup_hook
+ If non-zero, this is the address of a function to call just before
+ `readline' prints the first prompt.
+
+ - Variable: rl_hook_func_t * rl_pre_input_hook
+ If non-zero, this is the address of a function to call after the
+ first prompt has been printed and just before `readline' starts
+ reading input characters.
+
+ - Variable: rl_hook_func_t * rl_event_hook
+ If non-zero, this is the address of a function to call periodically
+ when Readline is waiting for terminal input. By default, this
+ will be called at most ten times a second if there is no keyboard
+ input.
+
+ - Variable: rl_getc_func_t * rl_getc_function
+ If non-zero, Readline will call indirectly through this pointer to
+ get a character from the input stream. By default, it is set to
+ `rl_getc', the default Readline character input function (*note
+ Character Input::).
+
+ - Variable: rl_voidfunc_t * rl_redisplay_function
+ If non-zero, Readline will call indirectly through this pointer to
+ update the display with the current contents of the editing buffer.
+ By default, it is set to `rl_redisplay', the default Readline
+ redisplay function (*note Redisplay::).
+
+ - Variable: rl_vintfunc_t * rl_prep_term_function
+ If non-zero, Readline will call indirectly through this pointer to
+ initialize the terminal. The function takes a single argument, an
+ `int' flag that says whether or not to use eight-bit characters.
+ By default, this is set to `rl_prep_terminal' (*note Terminal
+ Management::).
+
+ - Variable: rl_voidfunc_t * rl_deprep_term_function
+ If non-zero, Readline will call indirectly through this pointer to
+ reset the terminal. This function should undo the effects of
+ `rl_prep_term_function'. By default, this is set to
+ `rl_deprep_terminal' (*note Terminal Management::).
+
+ - Variable: Keymap rl_executing_keymap
+ This variable is set to the keymap (*note Keymaps::) in which the
+ currently executing readline function was found.
+
+ - Variable: Keymap rl_binding_keymap
+ This variable is set to the keymap (*note Keymaps::) in which the
+ last key binding occurred.
+
+ - Variable: char * rl_executing_macro
+ This variable is set to the text of any currently-executing macro.
+
+ - Variable: int rl_readline_state
+ A variable with bit values that encapsulate the current Readline
+ state. A bit is set with the `RL_SETSTATE' macro, and unset with
+ the `RL_UNSETSTATE' macro. Use the `RL_ISSTATE' macro to test
+ whether a particular state bit is set. Current state bits include:
+
+ `RL_STATE_NONE'
+ Readline has not yet been called, nor has it begun to
+ intialize.
+
+ `RL_STATE_INITIALIZING'
+ Readline is initializing its internal data structures.
+
+ `RL_STATE_INITIALIZED'
+ Readline has completed its initialization.
+
+ `RL_STATE_TERMPREPPED'
+ Readline has modified the terminal modes to do its own input
+ and redisplay.
+
+ `RL_STATE_READCMD'
+ Readline is reading a command from the keyboard.
+
+ `RL_STATE_METANEXT'
+ Readline is reading more input after reading the meta-prefix
+ character.
+
+ `RL_STATE_DISPATCHING'
+ Readline is dispatching to a command.
+
+ `RL_STATE_MOREINPUT'
+ Readline is reading more input while executing an editing
+ command.
+
+ `RL_STATE_ISEARCH'
+ Readline is performing an incremental history search.
+
+ `RL_STATE_NSEARCH'
+ Readline is performing a non-incremental history search.
+
+ `RL_STATE_SEARCH'
+ Readline is searching backward or forward through the history
+ for a string.
+
+ `RL_STATE_NUMERICARG'
+ Readline is reading a numeric argument.
+
+ `RL_STATE_MACROINPUT'
+ Readline is currently getting its input from a
+ previously-defined keyboard macro.
+
+ `RL_STATE_MACRODEF'
+ Readline is currently reading characters defining a keyboard
+ macro.
+
+ `RL_STATE_OVERWRITE'
+ Readline is in overwrite mode.
+
+ `RL_STATE_COMPLETING'
+ Readline is performing word completion.
+
+ `RL_STATE_SIGHANDLER'
+ Readline is currently executing the readline signal handler.
+
+ `RL_STATE_UNDOING'
+ Readline is performing an undo.
+
+ `RL_STATE_DONE'
+ Readline has read a key sequence bound to `accept-line' and
+ is about to return the line to the caller.
+
+
+ - Variable: int rl_explicit_arg
+ Set to a non-zero value if an explicit numeric argument was
+ specified by the user. Only valid in a bindable command function.
+
+ - Variable: int rl_numeric_arg
+ Set to the value of any numeric argument explicitly specified by
+ the user before executing the current Readline function. Only
+ valid in a bindable command function.
+
+ - Variable: int rl_editing_mode
+ Set to a value denoting Readline's current editing mode. A value
+ of 1 means Readline is currently in emacs mode; 0 means that vi
+ mode is active.
+
+
+File: readline.info, Node: Readline Convenience Functions, Next: Readline Signal Handling, Prev: Readline Variables, Up: Programming with GNU Readline
+
+Readline Convenience Functions
+==============================
+
+* Menu:
+
+* Function Naming:: How to give a function you write a name.
+* Keymaps:: Making keymaps.
+* Binding Keys:: Changing Keymaps.
+* Associating Function Names and Bindings:: Translate function names to
+ key sequences.
+* Allowing Undoing:: How to make your functions undoable.
+* Redisplay:: Functions to control line display.
+* Modifying Text:: Functions to modify `rl_line_buffer'.
+* Character Input:: Functions to read keyboard input.
+* Terminal Management:: Functions to manage terminal settings.
+* Utility Functions:: Generally useful functions and hooks.
+* Miscellaneous Functions:: Functions that don't fall into any category.
+* Alternate Interface:: Using Readline in a `callback' fashion.
+* A Readline Example:: An example Readline function.
+
+
+File: readline.info, Node: Function Naming, Next: Keymaps, Up: Readline Convenience Functions
+
+Naming a Function
+-----------------
+
+ The user can dynamically change the bindings of keys while using
+Readline. This is done by representing the function with a descriptive
+name. The user is able to type the descriptive name when referring to
+the function. Thus, in an init file, one might find
+
+ Meta-Rubout: backward-kill-word
+
+ This binds the keystroke <Meta-Rubout> to the function
+_descriptively_ named `backward-kill-word'. You, as the programmer,
+should bind the functions you write to descriptive names as well.
+Readline provides a function for doing that:
+
+ - Function: int rl_add_defun (const char *name, rl_command_func_t
+ *function, int key)
+ Add NAME to the list of named functions. Make FUNCTION be the
+ function that gets called. If KEY is not -1, then bind it to
+ FUNCTION using `rl_bind_key()'.
+
+ Using this function alone is sufficient for most applications. It is
+the recommended way to add a few functions to the default functions that
+Readline has built in. If you need to do something other than adding a
+function to Readline, you may need to use the underlying functions
+described below.
+
+
+File: readline.info, Node: Keymaps, Next: Binding Keys, Prev: Function Naming, Up: Readline Convenience Functions
+
+Selecting a Keymap
+------------------
+
+ Key bindings take place on a "keymap". The keymap is the
+association between the keys that the user types and the functions that
+get run. You can make your own keymaps, copy existing keymaps, and tell
+Readline which keymap to use.
+
+ - Function: Keymap rl_make_bare_keymap (void)
+ Returns a new, empty keymap. The space for the keymap is
+ allocated with `malloc()'; the caller should free it by calling
+ `rl_discard_keymap()' when done.
+
+ - Function: Keymap rl_copy_keymap (Keymap map)
+ Return a new keymap which is a copy of MAP.
+
+ - Function: Keymap rl_make_keymap (void)
+ Return a new keymap with the printing characters bound to
+ rl_insert, the lowercase Meta characters bound to run their
+ equivalents, and the Meta digits bound to produce numeric
+ arguments.
+
+ - Function: void rl_discard_keymap (Keymap keymap)
+ Free the storage associated with KEYMAP.
+
+ Readline has several internal keymaps. These functions allow you to
+change which keymap is active.
+
+ - Function: Keymap rl_get_keymap (void)
+ Returns the currently active keymap.
+
+ - Function: void rl_set_keymap (Keymap keymap)
+ Makes KEYMAP the currently active keymap.
+
+ - Function: Keymap rl_get_keymap_by_name (const char *name)
+ Return the keymap matching NAME. NAME is one which would be
+ supplied in a `set keymap' inputrc line (*note Readline Init
+ File::).
+
+ - Function: char * rl_get_keymap_name (Keymap keymap)
+ Return the name matching KEYMAP. NAME is one which would be
+ supplied in a `set keymap' inputrc line (*note Readline Init
+ File::).
+
+
+File: readline.info, Node: Binding Keys, Next: Associating Function Names and Bindings, Prev: Keymaps, Up: Readline Convenience Functions
+
+Binding Keys
+------------
+
+ Key sequences are associate with functions through the keymap.
+Readline has several internal keymaps: `emacs_standard_keymap',
+`emacs_meta_keymap', `emacs_ctlx_keymap', `vi_movement_keymap', and
+`vi_insertion_keymap'. `emacs_standard_keymap' is the default, and the
+examples in this manual assume that.
+
+ Since `readline()' installs a set of default key bindings the first
+time it is called, there is always the danger that a custom binding
+installed before the first call to `readline()' will be overridden. An
+alternate mechanism is to install custom key bindings in an
+initialization function assigned to the `rl_startup_hook' variable
+(*note Readline Variables::).
+
+ These functions manage key bindings.
+
+ - Function: int rl_bind_key (int key, rl_command_func_t *function)
+ Binds KEY to FUNCTION in the currently active keymap. Returns
+ non-zero in the case of an invalid KEY.
+
+ - Function: int rl_bind_key_in_map (int key, rl_command_func_t
+ *function, Keymap map)
+ Bind KEY to FUNCTION in MAP. Returns non-zero in the case of an
+ invalid KEY.
+
+ - Function: int rl_unbind_key (int key)
+ Bind KEY to the null function in the currently active keymap.
+ Returns non-zero in case of error.
+
+ - Function: int rl_unbind_key_in_map (int key, Keymap map)
+ Bind KEY to the null function in MAP. Returns non-zero in case of
+ error.
+
+ - Function: int rl_unbind_function_in_map (rl_command_func_t
+ *function, Keymap map)
+ Unbind all keys that execute FUNCTION in MAP.
+
+ - Function: int rl_unbind_command_in_map (const char *command, Keymap
+ map)
+ Unbind all keys that are bound to COMMAND in MAP.
+
+ - Function: int rl_set_key (const char *keyseq, rl_command_func_t
+ *function, Keymap map)
+ Bind the key sequence represented by the string KEYSEQ to the
+ function FUNCTION. This makes new keymaps as necessary. The
+ initial keymap in which to do bindings is MAP.
+
+ - Function: int rl_generic_bind (int type, const char *keyseq, char
+ *data, Keymap map)
+ Bind the key sequence represented by the string KEYSEQ to the
+ arbitrary pointer DATA. TYPE says what kind of data is pointed to
+ by DATA; this can be a function (`ISFUNC'), a macro (`ISMACR'), or
+ a keymap (`ISKMAP'). This makes new keymaps as necessary. The
+ initial keymap in which to do bindings is MAP.
+
+ - Function: int rl_parse_and_bind (char *line)
+ Parse LINE as if it had been read from the `inputrc' file and
+ perform any key bindings and variable assignments found (*note
+ Readline Init File::).
+
+ - Function: int rl_read_init_file (const char *filename)
+ Read keybindings and variable assignments from FILENAME (*note
+ Readline Init File::).
+
+
+File: readline.info, Node: Associating Function Names and Bindings, Next: Allowing Undoing, Prev: Binding Keys, Up: Readline Convenience Functions
+
+Associating Function Names and Bindings
+---------------------------------------
+
+ These functions allow you to find out what keys invoke named
+functions and the functions invoked by a particular key sequence. You
+may also associate a new function name with an arbitrary function.
+
+ - Function: rl_command_func_t * rl_named_function (const char *name)
+ Return the function with name NAME.
+
+ - Function: rl_command_func_t * rl_function_of_keyseq (const char
+ *keyseq, Keymap map, int *type)
+ Return the function invoked by KEYSEQ in keymap MAP. If MAP is
+ `NULL', the current keymap is used. If TYPE is not `NULL', the
+ type of the object is returned in the `int' variable it points to
+ (one of `ISFUNC', `ISKMAP', or `ISMACR').
+
+ - Function: char ** rl_invoking_keyseqs (rl_command_func_t *function)
+ Return an array of strings representing the key sequences used to
+ invoke FUNCTION in the current keymap.
+
+ - Function: char ** rl_invoking_keyseqs_in_map (rl_command_func_t
+ *function, Keymap map)
+ Return an array of strings representing the key sequences used to
+ invoke FUNCTION in the keymap MAP.
+
+ - Function: void rl_function_dumper (int readable)
+ Print the readline function names and the key sequences currently
+ bound to them to `rl_outstream'. If READABLE is non-zero, the
+ list is formatted in such a way that it can be made part of an
+ `inputrc' file and re-read.
+
+ - Function: void rl_list_funmap_names (void)
+ Print the names of all bindable Readline functions to
+ `rl_outstream'.
+
+ - Function: const char ** rl_funmap_names (void)
+ Return a NULL terminated array of known function names. The array
+ is sorted. The array itself is allocated, but not the strings
+ inside. You should `free()' the array when you are done, but not
+ the pointers.
+
+ - Function: int rl_add_funmap_entry (const char *name,
+ rl_command_func_t *function)
+ Add NAME to the list of bindable Readline command names, and make
+ FUNCTION the function to be called when NAME is invoked.
+
+
+File: readline.info, Node: Allowing Undoing, Next: Redisplay, Prev: Associating Function Names and Bindings, Up: Readline Convenience Functions
+
+Allowing Undoing
+----------------
+
+ Supporting the undo command is a painless thing, and makes your
+functions much more useful. It is certainly easy to try something if
+you know you can undo it.
+
+ If your function simply inserts text once, or deletes text once, and
+uses `rl_insert_text()' or `rl_delete_text()' to do it, then undoing is
+already done for you automatically.
+
+ If you do multiple insertions or multiple deletions, or any
+combination of these operations, you should group them together into
+one operation. This is done with `rl_begin_undo_group()' and
+`rl_end_undo_group()'.
+
+ The types of events that can be undone are:
+
+ enum undo_code { UNDO_DELETE, UNDO_INSERT, UNDO_BEGIN, UNDO_END };
+
+ Notice that `UNDO_DELETE' means to insert some text, and
+`UNDO_INSERT' means to delete some text. That is, the undo code tells
+what to undo, not how to undo it. `UNDO_BEGIN' and `UNDO_END' are tags
+added by `rl_begin_undo_group()' and `rl_end_undo_group()'.
+
+ - Function: int rl_begin_undo_group (void)
+ Begins saving undo information in a group construct. The undo
+ information usually comes from calls to `rl_insert_text()' and
+ `rl_delete_text()', but could be the result of calls to
+ `rl_add_undo()'.
+
+ - Function: int rl_end_undo_group (void)
+ Closes the current undo group started with `rl_begin_undo_group
+ ()'. There should be one call to `rl_end_undo_group()' for each
+ call to `rl_begin_undo_group()'.
+
+ - Function: void rl_add_undo (enum undo_code what, int start, int end,
+ char *text)
+ Remember how to undo an event (according to WHAT). The affected
+ text runs from START to END, and encompasses TEXT.
+
+ - Function: void rl_free_undo_list (void)
+ Free the existing undo list.
+
+ - Function: int rl_do_undo (void)
+ Undo the first thing on the undo list. Returns `0' if there was
+ nothing to undo, non-zero if something was undone.
+
+ Finally, if you neither insert nor delete text, but directly modify
+the existing text (e.g., change its case), call `rl_modifying()' once,
+just before you modify the text. You must supply the indices of the
+text range that you are going to modify.
+
+ - Function: int rl_modifying (int start, int end)
+ Tell Readline to save the text between START and END as a single
+ undo unit. It is assumed that you will subsequently modify that
+ text.
+
+
+File: readline.info, Node: Redisplay, Next: Modifying Text, Prev: Allowing Undoing, Up: Readline Convenience Functions
+
+Redisplay
+---------
+
+ - Function: void rl_redisplay (void)
+ Change what's displayed on the screen to reflect the current
+ contents of `rl_line_buffer'.
+
+ - Function: int rl_forced_update_display (void)
+ Force the line to be updated and redisplayed, whether or not
+ Readline thinks the screen display is correct.
+
+ - Function: int rl_on_new_line (void)
+ Tell the update functions that we have moved onto a new (empty)
+ line, usually after ouputting a newline.
+
+ - Function: int rl_on_new_line_with_prompt (void)
+ Tell the update functions that we have moved onto a new line, with
+ RL_PROMPT already displayed. This could be used by applications
+ that want to output the prompt string themselves, but still need
+ Readline to know the prompt string length for redisplay. It
+ should be used after setting RL_ALREADY_PROMPTED.
+
+ - Function: int rl_reset_line_state (void)
+ Reset the display state to a clean state and redisplay the current
+ line starting on a new line.
+
+ - Function: int rl_crlf (void)
+ Move the cursor to the start of the next screen line.
+
+ - Function: int rl_show_char (int c)
+ Display character C on `rl_outstream'. If Readline has not been
+ set to display meta characters directly, this will convert meta
+ characters to a meta-prefixed key sequence. This is intended for
+ use by applications which wish to do their own redisplay.
+
+ - Function: int rl_message (const char *, ...)
+ The arguments are a format string as would be supplied to `printf',
+ possibly containing conversion specifications such as `%d', and
+ any additional arguments necessary to satisfy the conversion
+ specifications. The resulting string is displayed in the "echo
+ area". The echo area is also used to display numeric arguments
+ and search strings.
+
+ - Function: int rl_clear_message (void)
+ Clear the message in the echo area.
+
+ - Function: void rl_save_prompt (void)
+ Save the local Readline prompt display state in preparation for
+ displaying a new message in the message area with `rl_message()'.
+
+ - Function: void rl_restore_prompt (void)
+ Restore the local Readline prompt display state saved by the most
+ recent call to `rl_save_prompt'.
+
+ - Function: int rl_expand_prompt (char *prompt)
+ Expand any special character sequences in PROMPT and set up the
+ local Readline prompt redisplay variables. This function is
+ called by `readline()'. It may also be called to expand the
+ primary prompt if the `rl_on_new_line_with_prompt()' function or
+ `rl_already_prompted' variable is used. It returns the number of
+ visible characters on the last line of the (possibly multi-line)
+ prompt.
+
+ - Function: int rl_set_prompt (const char *prompt)
+ Make Readline use PROMPT for subsequent redisplay. This calls
+ `rl_expand_prompt()' to expand the prompt and sets `rl_prompt' to
+ the result.
+
+
+File: readline.info, Node: Modifying Text, Next: Character Input, Prev: Redisplay, Up: Readline Convenience Functions
+
+Modifying Text
+--------------
+
+ - Function: int rl_insert_text (const char *text)
+ Insert TEXT into the line at the current cursor position.
+
+ - Function: int rl_delete_text (int start, int end)
+ Delete the text between START and END in the current line.
+
+ - Function: char * rl_copy_text (int start, int end)
+ Return a copy of the text between START and END in the current
+ line.
+
+ - Function: int rl_kill_text (int start, int end)
+ Copy the text between START and END in the current line to the
+ kill ring, appending or prepending to the last kill if the last
+ command was a kill command. The text is deleted. If START is
+ less than END, the text is appended, otherwise prepended. If the
+ last command was not a kill, a new kill ring slot is used.
+
+ - Function: int rl_push_macro_input (char *macro)
+ Cause MACRO to be inserted into the line, as if it had been invoked
+ by a key bound to a macro. Not especially useful; use
+ `rl_insert_text()' instead.
+
+
+File: readline.info, Node: Character Input, Next: Terminal Management, Prev: Modifying Text, Up: Readline Convenience Functions
+
+Character Input
+---------------
+
+ - Function: int rl_read_key (void)
+ Return the next character available from Readline's current input
+ stream. This handles input inserted into the input stream via
+ RL_PENDING_INPUT (*note Readline Variables::) and
+ `rl_stuff_char()', macros, and characters read from the keyboard.
+ While waiting for input, this function will call any function
+ assigned to the `rl_event_hook' variable.
+
+ - Function: int rl_getc (FILE *stream)
+ Return the next character available from STREAM, which is assumed
+ to be the keyboard.
+
+ - Function: int rl_stuff_char (int c)
+ Insert C into the Readline input stream. It will be "read" before
+ Readline attempts to read characters from the terminal with
+ `rl_read_key()'.
+
+ - Function: int rl_execute_next (int c)
+ Make C be the next command to be executed when `rl_read_key()' is
+ called. This sets RL_PENDING_INPUT.
+
+ - Function: int rl_clear_pending_input (void)
+ Unset RL_PENDING_INPUT, effectively negating the effect of any
+ previous call to `rl_execute_next()'. This works only if the
+ pending input has not already been read with `rl_read_key()'.
+
+ - Function: int rl_set_keyboard_input_timeout (int u)
+ While waiting for keyboard input in `rl_read_key()', Readline will
+ wait for U microseconds for input before calling any function
+ assigned to `rl_event_hook'. The default waiting period is
+ one-tenth of a second. Returns the old timeout value.
+
+
+File: readline.info, Node: Terminal Management, Next: Utility Functions, Prev: Character Input, Up: Readline Convenience Functions
+
+Terminal Management
+-------------------
+
+ - Function: void rl_prep_terminal (int meta_flag)
+ Modify the terminal settings for Readline's use, so `readline()'
+ can read a single character at a time from the keyboard. The
+ META_FLAG argument should be non-zero if Readline should read
+ eight-bit input.
+
+ - Function: void rl_deprep_terminal (void)
+ Undo the effects of `rl_prep_terminal()', leaving the terminal in
+ the state in which it was before the most recent call to
+ `rl_prep_terminal()'.
+
+ - Function: void rl_tty_set_default_bindings (Keymap kmap)
+ Read the operating system's terminal editing characters (as would
+ be displayed by `stty') to their Readline equivalents. The
+ bindings are performed in KMAP.
+
+ - Function: int rl_reset_terminal (const char *terminal_name)
+ Reinitialize Readline's idea of the terminal settings using
+ TERMINAL_NAME as the terminal type (e.g., `vt100'). If
+ TERMINAL_NAME is `NULL', the value of the `TERM' environment
+ variable is used.
+
+
+File: readline.info, Node: Utility Functions, Next: Miscellaneous Functions, Prev: Terminal Management, Up: Readline Convenience Functions
+
+Utility Functions
+-----------------
+
+ - Function: int rl_extend_line_buffer (int len)
+ Ensure that `rl_line_buffer' has enough space to hold LEN
+ characters, possibly reallocating it if necessary.
+
+ - Function: int rl_initialize (void)
+ Initialize or re-initialize Readline's internal state. It's not
+ strictly necessary to call this; `readline()' calls it before
+ reading any input.
+
+ - Function: int rl_ding (void)
+ Ring the terminal bell, obeying the setting of `bell-style'.
+
+ - Function: int rl_alphabetic (int c)
+ Return 1 if C is an alphabetic character.
+
+ - Function: void rl_display_match_list (char **matches, int len, int
+ max)
+ A convenience function for displaying a list of strings in
+ columnar format on Readline's output stream. `matches' is the list
+ of strings, in argv format, such as a list of completion matches.
+ `len' is the number of strings in `matches', and `max' is the
+ length of the longest string in `matches'. This function uses the
+ setting of `print-completions-horizontally' to select how the
+ matches are displayed (*note Readline Init File Syntax::).
+
+ The following are implemented as macros, defined in `chardefs.h'.
+Applications should refrain from using them.
+
+ - Function: int _rl_uppercase_p (int c)
+ Return 1 if C is an uppercase alphabetic character.
+
+ - Function: int _rl_lowercase_p (int c)
+ Return 1 if C is a lowercase alphabetic character.
+
+ - Function: int _rl_digit_p (int c)
+ Return 1 if C is a numeric character.
+
+ - Function: int _rl_to_upper (int c)
+ If C is a lowercase alphabetic character, return the corresponding
+ uppercase character.
+
+ - Function: int _rl_to_lower (int c)
+ If C is an uppercase alphabetic character, return the corresponding
+ lowercase character.
+
+ - Function: int _rl_digit_value (int c)
+ If C is a number, return the value it represents.
+
+
+File: readline.info, Node: Miscellaneous Functions, Next: Alternate Interface, Prev: Utility Functions, Up: Readline Convenience Functions
+
+Miscellaneous Functions
+-----------------------
+
+ - Function: int rl_macro_bind (const char *keyseq, const char *macro,
+ Keymap map)
+ Bind the key sequence KEYSEQ to invoke the macro MACRO. The
+ binding is performed in MAP. When KEYSEQ is invoked, the MACRO
+ will be inserted into the line. This function is deprecated; use
+ `rl_generic_bind()' instead.
+
+ - Function: void rl_macro_dumper (int readable)
+ Print the key sequences bound to macros and their values, using
+ the current keymap, to `rl_outstream'. If READABLE is non-zero,
+ the list is formatted in such a way that it can be made part of an
+ `inputrc' file and re-read.
+
+ - Function: int rl_variable_bind (const char *variable, const char
+ *value)
+ Make the Readline variable VARIABLE have VALUE. This behaves as
+ if the readline command `set VARIABLE VALUE' had been executed in
+ an `inputrc' file (*note Readline Init File Syntax::).
+
+ - Function: void rl_variable_dumper (int readable)
+ Print the readline variable names and their current values to
+ `rl_outstream'. If READABLE is non-zero, the list is formatted in
+ such a way that it can be made part of an `inputrc' file and
+ re-read.
+
+ - Function: int rl_set_paren_blink_timeout (int u)
+ Set the time interval (in microseconds) that Readline waits when
+ showing a balancing character when `blink-matching-paren' has been
+ enabled.
+
+
+File: readline.info, Node: Alternate Interface, Next: A Readline Example, Prev: Miscellaneous Functions, Up: Readline Convenience Functions
+
+Alternate Interface
+-------------------
+
+ An alternate interface is available to plain `readline()'. Some
+applications need to interleave keyboard I/O with file, device, or
+window system I/O, typically by using a main loop to `select()' on
+various file descriptors. To accomodate this need, readline can also
+be invoked as a `callback' function from an event loop. There are
+functions available to make this easy.
+
+ - Function: void rl_callback_handler_install (const char *prompt,
+ rl_vcpfunc_t *lhandler)
+ Set up the terminal for readline I/O and display the initial
+ expanded value of PROMPT. Save the value of LHANDLER to use as a
+ function to call when a complete line of input has been entered.
+ The function takes the text of the line as an argument.
+
+ - Function: void rl_callback_read_char (void)
+ Whenever an application determines that keyboard input is
+ available, it should call `rl_callback_read_char()', which will
+ read the next character from the current input source. If that
+ character completes the line, `rl_callback_read_char' will invoke
+ the LHANDLER function saved by `rl_callback_handler_install' to
+ process the line. `EOF' is indicated by calling LHANDLER with a
+ `NULL' line.
+
+ - Function: void rl_callback_handler_remove (void)
+ Restore the terminal to its initial state and remove the line
+ handler. This may be called from within a callback as well as
+ independently.
+
+
+File: readline.info, Node: A Readline Example, Prev: Alternate Interface, Up: Readline Convenience Functions
+
+A Readline Example
+------------------
+
+ Here is a function which changes lowercase characters to their
+uppercase equivalents, and uppercase characters to lowercase. If this
+function was bound to `M-c', then typing `M-c' would change the case of
+the character under point. Typing `M-1 0 M-c' would change the case of
+the following 10 characters, leaving the cursor on the last character
+changed.
+
+ /* Invert the case of the COUNT following characters. */
+ int
+ invert_case_line (count, key)
+ int count, key;
+ {
+ register int start, end, i;
+
+ start = rl_point;
+
+ if (rl_point >= rl_end)
+ return (0);
+
+ if (count < 0)
+ {
+ direction = -1;
+ count = -count;
+ }
+ else
+ direction = 1;
+
+ /* Find the end of the range to modify. */
+ end = start + (count * direction);
+
+ /* Force it to be within range. */
+ if (end > rl_end)
+ end = rl_end;
+ else if (end < 0)
+ end = 0;
+
+ if (start == end)
+ return (0);
+
+ if (start > end)
+ {
+ int temp = start;
+ start = end;
+ end = temp;
+ }
+
+ /* Tell readline that we are modifying the line, so it will save
+ the undo information. */
+ rl_modifying (start, end);
+
+ for (i = start; i != end; i++)
+ {
+ if (_rl_uppercase_p (rl_line_buffer[i]))
+ rl_line_buffer[i] = _rl_to_lower (rl_line_buffer[i]);
+ else if (_rl_lowercase_p (rl_line_buffer[i]))
+ rl_line_buffer[i] = _rl_to_upper (rl_line_buffer[i]);
+ }
+ /* Move point to on top of the last character changed. */
+ rl_point = (direction == 1) ? end - 1 : start;
+ return (0);
+ }
+
+
+File: readline.info, Node: Readline Signal Handling, Next: Custom Completers, Prev: Readline Convenience Functions, Up: Programming with GNU Readline
+
+Readline Signal Handling
+========================
+
+ Signals are asynchronous events sent to a process by the Unix kernel,
+sometimes on behalf of another process. They are intended to indicate
+exceptional events, like a user pressing the interrupt key on his
+terminal, or a network connection being broken. There is a class of
+signals that can be sent to the process currently reading input from
+the keyboard. Since Readline changes the terminal attributes when it
+is called, it needs to perform special processing when such a signal is
+received in order to restore the terminal to a sane state, or provide
+application writers with functions to do so manually.
+
+ Readline contains an internal signal handler that is installed for a
+number of signals (`SIGINT', `SIGQUIT', `SIGTERM', `SIGALRM',
+`SIGTSTP', `SIGTTIN', and `SIGTTOU'). When one of these signals is
+received, the signal handler will reset the terminal attributes to
+those that were in effect before `readline()' was called, reset the
+signal handling to what it was before `readline()' was called, and
+resend the signal to the calling application. If and when the calling
+application's signal handler returns, Readline will reinitialize the
+terminal and continue to accept input. When a `SIGINT' is received,
+the Readline signal handler performs some additional work, which will
+cause any partially-entered line to be aborted (see the description of
+`rl_free_line_state()' below).
+
+ There is an additional Readline signal handler, for `SIGWINCH', which
+the kernel sends to a process whenever the terminal's size changes (for
+example, if a user resizes an `xterm'). The Readline `SIGWINCH'
+handler updates Readline's internal screen size information, and then
+calls any `SIGWINCH' signal handler the calling application has
+installed. Readline calls the application's `SIGWINCH' signal handler
+without resetting the terminal to its original state. If the
+application's signal handler does more than update its idea of the
+terminal size and return (for example, a `longjmp' back to a main
+processing loop), it _must_ call `rl_cleanup_after_signal()' (described
+below), to restore the terminal state.
+
+ Readline provides two variables that allow application writers to
+control whether or not it will catch certain signals and act on them
+when they are received. It is important that applications change the
+values of these variables only when calling `readline()', not in a
+signal handler, so Readline's internal signal state is not corrupted.
+
+ - Variable: int rl_catch_signals
+ If this variable is non-zero, Readline will install signal
+ handlers for `SIGINT', `SIGQUIT', `SIGTERM', `SIGALRM', `SIGTSTP',
+ `SIGTTIN', and `SIGTTOU'.
+
+ The default value of `rl_catch_signals' is 1.
+
+ - Variable: int rl_catch_sigwinch
+ If this variable is non-zero, Readline will install a signal
+ handler for `SIGWINCH'.
+
+ The default value of `rl_catch_sigwinch' is 1.
+
+ If an application does not wish to have Readline catch any signals,
+or to handle signals other than those Readline catches (`SIGHUP', for
+example), Readline provides convenience functions to do the necessary
+terminal and internal state cleanup upon receipt of a signal.
+
+ - Function: void rl_cleanup_after_signal (void)
+ This function will reset the state of the terminal to what it was
+ before `readline()' was called, and remove the Readline signal
+ handlers for all signals, depending on the values of
+ `rl_catch_signals' and `rl_catch_sigwinch'.
+
+ - Function: void rl_free_line_state (void)
+ This will free any partial state associated with the current input
+ line (undo information, any partial history entry, any
+ partially-entered keyboard macro, and any partially-entered
+ numeric argument). This should be called before
+ `rl_cleanup_after_signal()'. The Readline signal handler for
+ `SIGINT' calls this to abort the current input line.
+
+ - Function: void rl_reset_after_signal (void)
+ This will reinitialize the terminal and reinstall any Readline
+ signal handlers, depending on the values of `rl_catch_signals' and
+ `rl_catch_sigwinch'.
+
+ If an application does not wish Readline to catch `SIGWINCH', it may
+call `rl_resize_terminal()' or `rl_set_screen_size()' to force Readline
+to update its idea of the terminal size when a `SIGWINCH' is received.
+
+ - Function: void rl_resize_terminal (void)
+ Update Readline's internal screen size by reading values from the
+ kernel.
+
+ - Function: void rl_set_screen_size (int rows, int cols)
+ Set Readline's idea of the terminal size to ROWS rows and COLS
+ columns.
+
+ If an application does not want to install a `SIGWINCH' handler, but
+is still interested in the screen dimensions, Readline's idea of the
+screen size may be queried.
+
+ - Function: void rl_get_screen_size (int *rows, int *cols)
+ Return Readline's idea of the terminal's size in the variables
+ pointed to by the arguments.
+
+ The following functions install and remove Readline's signal
+handlers.
+
+ - Function: int rl_set_signals (void)
+ Install Readline's signal handler for `SIGINT', `SIGQUIT',
+ `SIGTERM', `SIGALRM', `SIGTSTP', `SIGTTIN', `SIGTTOU', and
+ `SIGWINCH', depending on the values of `rl_catch_signals' and
+ `rl_catch_sigwinch'.
+
+ - Function: int rl_clear_signals (void)
+ Remove all of the Readline signal handlers installed by
+ `rl_set_signals()'.
+
+
+File: readline.info, Node: Custom Completers, Prev: Readline Signal Handling, Up: Programming with GNU Readline
+
+Custom Completers
+=================
+
+ Typically, a program that reads commands from the user has a way of
+disambiguating commands and data. If your program is one of these, then
+it can provide completion for commands, data, or both. The following
+sections describe how your program and Readline cooperate to provide
+this service.
+
+* Menu:
+
+* How Completing Works:: The logic used to do completion.
+* Completion Functions:: Functions provided by Readline.
+* Completion Variables:: Variables which control completion.
+* A Short Completion Example:: An example of writing completer subroutines.
+
+
+File: readline.info, Node: How Completing Works, Next: Completion Functions, Up: Custom Completers
+
+How Completing Works
+--------------------
+
+ In order to complete some text, the full list of possible completions
+must be available. That is, it is not possible to accurately expand a
+partial word without knowing all of the possible words which make sense
+in that context. The Readline library provides the user interface to
+completion, and two of the most common completion functions: filename
+and username. For completing other types of text, you must write your
+own completion function. This section describes exactly what such
+functions must do, and provides an example.
+
+ There are three major functions used to perform completion:
+
+ 1. The user-interface function `rl_complete()'. This function is
+ called with the same arguments as other bindable Readline
+ functions: COUNT and INVOKING_KEY. It isolates the word to be
+ completed and calls `rl_completion_matches()' to generate a list
+ of possible completions. It then either lists the possible
+ completions, inserts the possible completions, or actually
+ performs the completion, depending on which behavior is desired.
+
+ 2. The internal function `rl_completion_matches()' uses an
+ application-supplied "generator" function to generate the list of
+ possible matches, and then returns the array of these matches.
+ The caller should place the address of its generator function in
+ `rl_completion_entry_function'.
+
+ 3. The generator function is called repeatedly from
+ `rl_completion_matches()', returning a string each time. The
+ arguments to the generator function are TEXT and STATE. TEXT is
+ the partial word to be completed. STATE is zero the first time
+ the function is called, allowing the generator to perform any
+ necessary initialization, and a positive non-zero integer for each
+ subsequent call. The generator function returns `(char *)NULL' to
+ inform `rl_completion_matches()' that there are no more
+ possibilities left. Usually the generator function computes the
+ list of possible completions when STATE is zero, and returns them
+ one at a time on subsequent calls. Each string the generator
+ function returns as a match must be allocated with `malloc()';
+ Readline frees the strings when it has finished with them.
+
+
+ - Function: int rl_complete (int ignore, int invoking_key)
+ Complete the word at or before point. You have supplied the
+ function that does the initial simple matching selection algorithm
+ (see `rl_completion_matches()'). The default is to do filename
+ completion.
+
+ - Variable: rl_compentry_func_t * rl_completion_entry_function
+ This is a pointer to the generator function for
+ `rl_completion_matches()'. If the value of
+ `rl_completion_entry_function' is `NULL' then the default filename
+ generator function, `rl_filename_completion_function()', is used.
+
+
+File: readline.info, Node: Completion Functions, Next: Completion Variables, Prev: How Completing Works, Up: Custom Completers
+
+Completion Functions
+--------------------
+
+ Here is the complete list of callable completion functions present in
+Readline.
+
+ - Function: int rl_complete_internal (int what_to_do)
+ Complete the word at or before point. WHAT_TO_DO says what to do
+ with the completion. A value of `?' means list the possible
+ completions. `TAB' means do standard completion. `*' means
+ insert all of the possible completions. `!' means to display all
+ of the possible completions, if there is more than one, as well as
+ performing partial completion.
+
+ - Function: int rl_complete (int ignore, int invoking_key)
+ Complete the word at or before point. You have supplied the
+ function that does the initial simple matching selection algorithm
+ (see `rl_completion_matches()' and `rl_completion_entry_function').
+ The default is to do filename completion. This calls
+ `rl_complete_internal()' with an argument depending on
+ INVOKING_KEY.
+
+ - Function: int rl_possible_completions (int count, int invoking_key)
+ List the possible completions. See description of `rl_complete
+ ()'. This calls `rl_complete_internal()' with an argument of `?'.
+
+ - Function: int rl_insert_completions (int count, int invoking_key)
+ Insert the list of possible completions into the line, deleting the
+ partially-completed word. See description of `rl_complete()'.
+ This calls `rl_complete_internal()' with an argument of `*'.
+
+ - Function: char ** rl_completion_matches (const char *text,
+ rl_compentry_func_t *entry_func)
+ Returns an array of strings which is a list of completions for
+ TEXT. If there are no completions, returns `NULL'. The first
+ entry in the returned array is the substitution for TEXT. The
+ remaining entries are the possible completions. The array is
+ terminated with a `NULL' pointer.
+
+ ENTRY_FUNC is a function of two args, and returns a `char *'. The
+ first argument is TEXT. The second is a state argument; it is
+ zero on the first call, and non-zero on subsequent calls.
+ ENTRY_FUNC returns a `NULL' pointer to the caller when there are
+ no more matches.
+
+ - Function: char * rl_filename_completion_function (const char *text,
+ int state)
+ A generator function for filename completion in the general case.
+ TEXT is a partial filename. The Bash source is a useful reference
+ for writing custom completion functions (the Bash completion
+ functions call this and other Readline functions).
+
+ - Function: char * rl_username_completion_function (const char *text,
+ int state)
+ A completion generator for usernames. TEXT contains a partial
+ username preceded by a random character (usually `~'). As with all
+ completion generators, STATE is zero on the first call and non-zero
+ for subsequent calls.
+
+
+File: readline.info, Node: Completion Variables, Next: A Short Completion Example, Prev: Completion Functions, Up: Custom Completers
+
+Completion Variables
+--------------------
+
+ - Variable: rl_compentry_func_t * rl_completion_entry_function
+ A pointer to the generator function for `rl_completion_matches()'.
+ `NULL' means to use `rl_filename_completion_function()', the
+ default filename completer.
+
+ - Variable: rl_completion_func_t * rl_attempted_completion_function
+ A pointer to an alternative function to create matches. The
+ function is called with TEXT, START, and END. START and END are
+ indices in `rl_line_buffer' defining the boundaries of TEXT, which
+ is a character string. If this function exists and returns
+ `NULL', or if this variable is set to `NULL', then `rl_complete()'
+ will call the value of `rl_completion_entry_function' to generate
+ matches, otherwise the array of strings returned will be used. If
+ this function sets the `rl_attempted_completion_over' variable to
+ a non-zero value, Readline will not perform its default completion
+ even if this function returns no matches.
+
+ - Variable: rl_quote_func_t * rl_filename_quoting_function
+ A pointer to a function that will quote a filename in an
+ application-specific fashion. This is called if filename
+ completion is being attempted and one of the characters in
+ `rl_filename_quote_characters' appears in a completed filename.
+ The function is called with TEXT, MATCH_TYPE, and QUOTE_POINTER.
+ The TEXT is the filename to be quoted. The MATCH_TYPE is either
+ `SINGLE_MATCH', if there is only one completion match, or
+ `MULT_MATCH'. Some functions use this to decide whether or not to
+ insert a closing quote character. The QUOTE_POINTER is a pointer
+ to any opening quote character the user typed. Some functions
+ choose to reset this character.
+
+ - Variable: rl_dequote_func_t * rl_filename_dequoting_function
+ A pointer to a function that will remove application-specific
+ quoting characters from a filename before completion is attempted,
+ so those characters do not interfere with matching the text
+ against names in the filesystem. It is called with TEXT, the text
+ of the word to be dequoted, and QUOTE_CHAR, which is the quoting
+ character that delimits the filename (usually `'' or `"'). If
+ QUOTE_CHAR is zero, the filename was not in an embedded string.
+
+ - Variable: rl_linebuf_func_t * rl_char_is_quoted_p
+ A pointer to a function to call that determines whether or not a
+ specific character in the line buffer is quoted, according to
+ whatever quoting mechanism the program calling Readline uses. The
+ function is called with two arguments: TEXT, the text of the line,
+ and INDEX, the index of the character in the line. It is used to
+ decide whether a character found in
+ `rl_completer_word_break_characters' should be used to break words
+ for the completer.
+
+ - Variable: int rl_completion_query_items
+ Up to this many items will be displayed in response to a
+ possible-completions call. After that, we ask the user if she is
+ sure she wants to see them all. The default value is 100.
+
+ - Variable: const char * rl_basic_word_break_characters
+ The basic list of characters that signal a break between words for
+ the completer routine. The default value of this variable is the
+ characters which break words for completion in Bash: `"
+ \t\n\"\\'`@$><=;|&{("'.
+
+ - Variable: const char * rl_basic_quote_characters
+ A list of quote characters which can cause a word break.
+
+ - Variable: const char * rl_completer_word_break_characters
+ The list of characters that signal a break between words for
+ `rl_complete_internal()'. The default list is the value of
+ `rl_basic_word_break_characters'.
+
+ - Variable: const char * rl_completer_quote_characters
+ A list of characters which can be used to quote a substring of the
+ line. Completion occurs on the entire substring, and within the
+ substring `rl_completer_word_break_characters' are treated as any
+ other character, unless they also appear within this list.
+
+ - Variable: const char * rl_filename_quote_characters
+ A list of characters that cause a filename to be quoted by the
+ completer when they appear in a completed filename. The default
+ is the null string.
+
+ - Variable: const char * rl_special_prefixes
+ The list of characters that are word break characters, but should
+ be left in TEXT when it is passed to the completion function.
+ Programs can use this to help determine what kind of completing to
+ do. For instance, Bash sets this variable to "$@" so that it can
+ complete shell variables and hostnames.
+
+ - Variable: int rl_completion_append_character
+ When a single completion alternative matches at the end of the
+ command line, this character is appended to the inserted
+ completion text. The default is a space character (` '). Setting
+ this to the null character (`\0') prevents anything being appended
+ automatically. This can be changed in custom completion functions
+ to provide the "most sensible word separator character" according
+ to an application-specific command line syntax specification.
+
+ - Variable: int rl_ignore_completion_duplicates
+ If non-zero, then duplicates in the matches are removed. The
+ default is 1.
+
+ - Variable: int rl_filename_completion_desired
+ Non-zero means that the results of the matches are to be treated as
+ filenames. This is _always_ zero on entry, and can only be changed
+ within a completion entry generator function. If it is set to a
+ non-zero value, directory names have a slash appended and Readline
+ attempts to quote completed filenames if they contain any
+ characters in `rl_filename_quote_characters' and
+ `rl_filename_quoting_desired' is set to a non-zero value.
+
+ - Variable: int rl_filename_quoting_desired
+ Non-zero means that the results of the matches are to be quoted
+ using double quotes (or an application-specific quoting mechanism)
+ if the completed filename contains any characters in
+ `rl_filename_quote_chars'. This is _always_ non-zero on entry,
+ and can only be changed within a completion entry generator
+ function. The quoting is effected via a call to the function
+ pointed to by `rl_filename_quoting_function'.
+
+ - Variable: int rl_attempted_completion_over
+ If an application-specific completion function assigned to
+ `rl_attempted_completion_function' sets this variable to a non-zero
+ value, Readline will not perform its default filename completion
+ even if the application's completion function returns no matches.
+ It should be set only by an application's completion function.
+
+ - Variable: int rl_completion_type
+ Set to a character describing the type of completion Readline is
+ currently attempting; see the description of
+ `rl_complete_internal()' (*note Completion Functions::) for the
+ list of characters.
+
+ - Variable: int rl_inhibit_completion
+ If this variable is non-zero, completion is inhibited. The
+ completion character will be inserted as any other bound to
+ `self-insert'.
+
+ - Variable: rl_compignore_func_t * rl_ignore_some_completions_function
+ This function, if defined, is called by the completer when real
+ filename completion is done, after all the matching names have
+ been generated. It is passed a `NULL' terminated array of matches.
+ The first element (`matches[0]') is the maximal substring common
+ to all matches. This function can re-arrange the list of matches
+ as required, but each element deleted from the array must be freed.
+
+ - Variable: rl_icppfunc_t * rl_directory_completion_hook
+ This function, if defined, is allowed to modify the directory
+ portion of filenames Readline completes. It is called with the
+ address of a string (the current directory name) as an argument,
+ and may modify that string. If the string is replaced with a new
+ string, the old value should be freed. Any modified directory
+ name should have a trailing slash. The modified value will be
+ displayed as part of the completion, replacing the directory
+ portion of the pathname the user typed. It returns an integer
+ that should be non-zero if the function modifies its directory
+ argument. It could be used to expand symbolic links or shell
+ variables in pathnames.
+
+ - Variable: rl_compdisp_func_t * rl_completion_display_matches_hook
+ If non-zero, then this is the address of a function to call when
+ completing a word would normally display the list of possible
+ matches. This function is called in lieu of Readline displaying
+ the list. It takes three arguments: (`char **'MATCHES, `int'
+ NUM_MATCHES, `int' MAX_LENGTH) where MATCHES is the array of
+ matching strings, NUM_MATCHES is the number of strings in that
+ array, and MAX_LENGTH is the length of the longest string in that
+ array. Readline provides a convenience function,
+ `rl_display_match_list', that takes care of doing the display to
+ Readline's output stream. That function may be called from this
+ hook.
+
+
+File: readline.info, Node: A Short Completion Example, Prev: Completion Variables, Up: Custom Completers
+
+A Short Completion Example
+--------------------------
+
+ Here is a small application demonstrating the use of the GNU Readline
+library. It is called `fileman', and the source code resides in
+`examples/fileman.c'. This sample application provides completion of
+command names, line editing features, and access to the history list.
+
+ /* fileman.c -- A tiny application which demonstrates how to use the
+ GNU Readline library. This application interactively allows users
+ to manipulate files and their modes. */
+
+ #include <stdio.h>
+ #include <sys/types.h>
+ #include <sys/file.h>
+ #include <sys/stat.h>
+ #include <sys/errno.h>
+
+ #include <readline/readline.h>
+ #include <readline/history.h>
+
+ extern char *xmalloc ();
+
+ /* The names of functions that actually do the manipulation. */
+ int com_list __P((char *));
+ int com_view __P((char *));
+ int com_rename __P((char *));
+ int com_stat __P((char *));
+ int com_pwd __P((char *));
+ int com_delete __P((char *));
+ int com_help __P((char *));
+ int com_cd __P((char *));
+ int com_quit __P((char *));
+
+ /* A structure which contains information on the commands this program
+ can understand. */
+
+ typedef struct {
+ char *name; /* User printable name of the function. */
+ rl_icpfunc_t *func; /* Function to call to do the job. */
+ char *doc; /* Documentation for this function. */
+ } COMMAND;
+
+ COMMAND commands[] = {
+ { "cd", com_cd, "Change to directory DIR" },
+ { "delete", com_delete, "Delete FILE" },
+ { "help", com_help, "Display this text" },
+ { "?", com_help, "Synonym for `help'" },
+ { "list", com_list, "List files in DIR" },
+ { "ls", com_list, "Synonym for `list'" },
+ { "pwd", com_pwd, "Print the current working directory" },
+ { "quit", com_quit, "Quit using Fileman" },
+ { "rename", com_rename, "Rename FILE to NEWNAME" },
+ { "stat", com_stat, "Print out statistics on FILE" },
+ { "view", com_view, "View the contents of FILE" },
+ { (char *)NULL, (rl_icpfunc_t *)NULL, (char *)NULL }
+ };
+
+ /* Forward declarations. */
+ char *stripwhite ();
+ COMMAND *find_command ();
+
+ /* The name of this program, as taken from argv[0]. */
+ char *progname;
+
+ /* When non-zero, this means the user is done using this program. */
+ int done;
+
+ char *
+ dupstr (s)
+ int s;
+ {
+ char *r;
+
+ r = xmalloc (strlen (s) + 1);
+ strcpy (r, s);
+ return (r);
+ }
+
+ main (argc, argv)
+ int argc;
+ char **argv;
+ {
+ char *line, *s;
+
+ progname = argv[0];
+
+ initialize_readline (); /* Bind our completer. */
+
+ /* Loop reading and executing lines until the user quits. */
+ for ( ; done == 0; )
+ {
+ line = readline ("FileMan: ");
+
+ if (!line)
+ break;
+
+ /* Remove leading and trailing whitespace from the line.
+ Then, if there is anything left, add it to the history list
+ and execute it. */
+ s = stripwhite (line);
+
+ if (*s)
+ {
+ add_history (s);
+ execute_line (s);
+ }
+
+ free (line);
+ }
+ exit (0);
+ }
+
+ /* Execute a command line. */
+ int
+ execute_line (line)
+ char *line;
+ {
+ register int i;
+ COMMAND *command;
+ char *word;
+
+ /* Isolate the command word. */
+ i = 0;
+ while (line[i] && whitespace (line[i]))
+ i++;
+ word = line + i;
+
+ while (line[i] && !whitespace (line[i]))
+ i++;
+
+ if (line[i])
+ line[i++] = '\0';
+
+ command = find_command (word);
+
+ if (!command)
+ {
+ fprintf (stderr, "%s: No such command for FileMan.\n", word);
+ return (-1);
+ }
+
+ /* Get argument to command, if any. */
+ while (whitespace (line[i]))
+ i++;
+
+ word = line + i;
+
+ /* Call the function. */
+ return ((*(command->func)) (word));
+ }
+
+ /* Look up NAME as the name of a command, and return a pointer to that
+ command. Return a NULL pointer if NAME isn't a command name. */
+ COMMAND *
+ find_command (name)
+ char *name;
+ {
+ register int i;
+
+ for (i = 0; commands[i].name; i++)
+ if (strcmp (name, commands[i].name) == 0)
+ return (&commands[i]);
+
+ return ((COMMAND *)NULL);
+ }
+
+ /* Strip whitespace from the start and end of STRING. Return a pointer
+ into STRING. */
+ char *
+ stripwhite (string)
+ char *string;
+ {
+ register char *s, *t;
+
+ for (s = string; whitespace (*s); s++)
+ ;
+
+ if (*s == 0)
+ return (s);
+
+ t = s + strlen (s) - 1;
+ while (t > s && whitespace (*t))
+ t--;
+ *++t = '\0';
+
+ return s;
+ }
+
+ /* **************************************************************** */
+ /* */
+ /* Interface to Readline Completion */
+ /* */
+ /* **************************************************************** */
+
+ char *command_generator __P((const char *, int));
+ char **fileman_completion __P((const char *, int, int));
+
+ /* Tell the GNU Readline library how to complete. We want to try to
+ complete on command names if this is the first word in the line, or
+ on filenames if not. */
+ initialize_readline ()
+ {
+ /* Allow conditional parsing of the ~/.inputrc file. */
+ rl_readline_name = "FileMan";
+
+ /* Tell the completer that we want a crack first. */
+ rl_attempted_completion_function = fileman_completion;
+ }
+
+ /* Attempt to complete on the contents of TEXT. START and END
+ bound the region of rl_line_buffer that contains the word to
+ complete. TEXT is the word to complete. We can use the entire
+ contents of rl_line_buffer in case we want to do some simple
+ parsing. Returnthe array of matches, or NULL if there aren't any. */
+ char **
+ fileman_completion (text, start, end)
+ const char *text;
+ int start, end;
+ {
+ char **matches;
+
+ matches = (char **)NULL;
+
+ /* If this word is at the start of the line, then it is a command
+ to complete. Otherwise it is the name of a file in the current
+ directory. */
+ if (start == 0)
+ matches = rl_completion_matches (text, command_generator);
+
+ return (matches);
+ }
+
+ /* Generator function for command completion. STATE lets us
+ know whether to start from scratch; without any state
+ (i.e. STATE == 0), then we start at the top of the list. */
+ char *
+ command_generator (text, state)
+ const char *text;
+ int state;
+ {
+ static int list_index, len;
+ char *name;
+
+ /* If this is a new word to complete, initialize now. This
+ includes saving the length of TEXT for efficiency, and
+ initializing the index variable to 0. */
+ if (!state)
+ {
+ list_index = 0;
+ len = strlen (text);
+ }
+
+ /* Return the next name which partially matches from the
+ command list. */
+ while (name = commands[list_index].name)
+ {
+ list_index++;
+
+ if (strncmp (name, text, len) == 0)
+ return (dupstr(name));
+ }
+
+ /* If no names matched, then return NULL. */
+ return ((char *)NULL);
+ }
+
+ /* **************************************************************** */
+ /* */
+ /* FileMan Commands */
+ /* */
+ /* **************************************************************** */
+
+ /* String to pass to system (). This is for the LIST, VIEW and RENAME
+ commands. */
+ static char syscom[1024];
+
+ /* List the file(s) named in arg. */
+ com_list (arg)
+ char *arg;
+ {
+ if (!arg)
+ arg = "";
+
+ sprintf (syscom, "ls -FClg %s", arg);
+ return (system (syscom));
+ }
+
+ com_view (arg)
+ char *arg;
+ {
+ if (!valid_argument ("view", arg))
+ return 1;
+
+ sprintf (syscom, "more %s", arg);
+ return (system (syscom));
+ }
+
+ com_rename (arg)
+ char *arg;
+ {
+ too_dangerous ("rename");
+ return (1);
+ }
+
+ com_stat (arg)
+ char *arg;
+ {
+ struct stat finfo;
+
+ if (!valid_argument ("stat", arg))
+ return (1);
+
+ if (stat (arg, &finfo) == -1)
+ {
+ perror (arg);
+ return (1);
+ }
+
+ printf ("Statistics for `%s':\n", arg);
+
+ printf ("%s has %d link%s, and is %d byte%s in length.\n", arg,
+ finfo.st_nlink,
+ (finfo.st_nlink == 1) ? "" : "s",
+ finfo.st_size,
+ (finfo.st_size == 1) ? "" : "s");
+ printf ("Inode Last Change at: %s", ctime (&finfo.st_ctime));
+ printf (" Last access at: %s", ctime (&finfo.st_atime));
+ printf (" Last modified at: %s", ctime (&finfo.st_mtime));
+ return (0);
+ }
+
+ com_delete (arg)
+ char *arg;
+ {
+ too_dangerous ("delete");
+ return (1);
+ }
+
+ /* Print out help for ARG, or for all of the commands if ARG is
+ not present. */
+ com_help (arg)
+ char *arg;
+ {
+ register int i;
+ int printed = 0;
+
+ for (i = 0; commands[i].name; i++)
+ {
+ if (!*arg || (strcmp (arg, commands[i].name) == 0))
+ {
+ printf ("%s\t\t%s.\n", commands[i].name, commands[i].doc);
+ printed++;
+ }
+ }
+
+ if (!printed)
+ {
+ printf ("No commands match `%s'. Possibilties are:\n", arg);
+
+ for (i = 0; commands[i].name; i++)
+ {
+ /* Print in six columns. */
+ if (printed == 6)
+ {
+ printed = 0;
+ printf ("\n");
+ }
+
+ printf ("%s\t", commands[i].name);
+ printed++;
+ }
+
+ if (printed)
+ printf ("\n");
+ }
+ return (0);
+ }
+
+ /* Change to the directory ARG. */
+ com_cd (arg)
+ char *arg;
+ {
+ if (chdir (arg) == -1)
+ {
+ perror (arg);
+ return 1;
+ }
+
+ com_pwd ("");
+ return (0);
+ }
+
+ /* Print out the current working directory. */
+ com_pwd (ignore)
+ char *ignore;
+ {
+ char dir[1024], *s;
+
+ s = getcwd (dir, sizeof(dir) - 1);
+ if (s == 0)
+ {
+ printf ("Error getting pwd: %s\n", dir);
+ return 1;
+ }
+
+ printf ("Current directory is %s\n", dir);
+ return 0;
+ }
+
+ /* The user wishes to quit using this program. Just set DONE
+ non-zero. */
+ com_quit (arg)
+ char *arg;
+ {
+ done = 1;
+ return (0);
+ }
+
+ /* Function which tells you that you can't do this. */
+ too_dangerous (caller)
+ char *caller;
+ {
+ fprintf (stderr,
+ "%s: Too dangerous for me to distribute. Write it yourself.\n",
+ caller);
+ }
+
+ /* Return non-zero if ARG is a valid argument for CALLER, else print
+ an error message and return zero. */
+ int
+ valid_argument (caller, arg)
+ char *caller, *arg;
+ {
+ if (!arg || !*arg)
+ {
+ fprintf (stderr, "%s: Argument required.\n", caller);
+ return (0);
+ }
+
+ return (1);
+ }
+
+
+File: readline.info, Node: Concept Index, Next: Function and Variable Index, Prev: Programming with GNU Readline, Up: Top
+
+Concept Index
+*************
+
+* Menu:
+
+* command editing: Readline Bare Essentials.
+* editing command lines: Readline Bare Essentials.
+* initialization file, readline: Readline Init File.
+* interaction, readline: Readline Interaction.
+* kill ring: Readline Killing Commands.
+* killing text: Readline Killing Commands.
+* notation, readline: Readline Bare Essentials.
+* readline, function: Basic Behavior.
+* variables, readline: Readline Init File Syntax.
+* yanking text: Readline Killing Commands.
+
+
+File: readline.info, Node: Function and Variable Index, Prev: Concept Index, Up: Top
+
+Function and Variable Index
+***************************
+
+* Menu:
+
+* _rl_digit_p: Utility Functions.
+* _rl_digit_value: Utility Functions.
+* _rl_lowercase_p: Utility Functions.
+* _rl_to_lower: Utility Functions.
+* _rl_to_upper: Utility Functions.
+* _rl_uppercase_p: Utility Functions.
+* abort (C-g): Miscellaneous Commands.
+* accept-line (Newline or Return): Commands For History.
+* backward-char (C-b): Commands For Moving.
+* backward-delete-char (Rubout): Commands For Text.
+* backward-kill-line (C-x Rubout): Commands For Killing.
+* backward-kill-word (M-<DEL>): Commands For Killing.
+* backward-word (M-b): Commands For Moving.
+* beginning-of-history (M-<): Commands For History.
+* beginning-of-line (C-a): Commands For Moving.
+* bell-style: Readline Init File Syntax.
+* call-last-kbd-macro (C-x e): Keyboard Macros.
+* capitalize-word (M-c): Commands For Text.
+* character-search (C-]): Miscellaneous Commands.
+* character-search-backward (M-C-]): Miscellaneous Commands.
+* clear-screen (C-l): Commands For Moving.
+* comment-begin: Readline Init File Syntax.
+* complete (<TAB>): Commands For Completion.
+* completion-query-items: Readline Init File Syntax.
+* convert-meta: Readline Init File Syntax.
+* copy-backward-word (): Commands For Killing.
+* copy-forward-word (): Commands For Killing.
+* copy-region-as-kill (): Commands For Killing.
+* delete-char (C-d): Commands For Text.
+* delete-char-or-list (): Commands For Completion.
+* delete-horizontal-space (): Commands For Killing.
+* digit-argument (M-0, M-1, ... M--): Numeric Arguments.
+* disable-completion: Readline Init File Syntax.
+* do-uppercase-version (M-a, M-b, M-X, ...): Miscellaneous Commands.
+* downcase-word (M-l): Commands For Text.
+* dump-functions (): Miscellaneous Commands.
+* dump-macros (): Miscellaneous Commands.
+* dump-variables (): Miscellaneous Commands.
+* editing-mode: Readline Init File Syntax.
+* enable-keypad: Readline Init File Syntax.
+* end-kbd-macro (C-x )): Keyboard Macros.
+* end-of-history (M->): Commands For History.
+* end-of-line (C-e): Commands For Moving.
+* exchange-point-and-mark (C-x C-x): Miscellaneous Commands.
+* expand-tilde: Readline Init File Syntax.
+* forward-backward-delete-char (): Commands For Text.
+* forward-char (C-f): Commands For Moving.
+* forward-search-history (C-s): Commands For History.
+* forward-word (M-f): Commands For Moving.
+* history-search-backward (): Commands For History.
+* history-search-forward (): Commands For History.
+* horizontal-scroll-mode: Readline Init File Syntax.
+* input-meta: Readline Init File Syntax.
+* insert-comment (M-#): Miscellaneous Commands.
+* insert-completions (M-*): Commands For Completion.
+* isearch-terminators: Readline Init File Syntax.
+* keymap: Readline Init File Syntax.
+* kill-line (C-k): Commands For Killing.
+* kill-region (): Commands For Killing.
+* kill-whole-line (): Commands For Killing.
+* kill-word (M-d): Commands For Killing.
+* mark-modified-lines: Readline Init File Syntax.
+* menu-complete (): Commands For Completion.
+* meta-flag: Readline Init File Syntax.
+* next-history (C-n): Commands For History.
+* non-incremental-forward-search-history (M-n): Commands For History.
+* non-incremental-reverse-search-history (M-p): Commands For History.
+* output-meta: Readline Init File Syntax.
+* possible-completions (M-?): Commands For Completion.
+* prefix-meta (<ESC>): Miscellaneous Commands.
+* previous-history (C-p): Commands For History.
+* quoted-insert (C-q or C-v): Commands For Text.
+* re-read-init-file (C-x C-r): Miscellaneous Commands.
+* readline: Basic Behavior.
+* redraw-current-line (): Commands For Moving.
+* reverse-search-history (C-r): Commands For History.
+* revert-line (M-r): Miscellaneous Commands.
+* rl_add_defun: Function Naming.
+* rl_add_funmap_entry: Associating Function Names and Bindings.
+* rl_add_undo: Allowing Undoing.
+* rl_alphabetic: Utility Functions.
+* rl_already_prompted: Readline Variables.
+* rl_attempted_completion_function: Completion Variables.
+* rl_attempted_completion_over: Completion Variables.
+* rl_basic_quote_characters: Completion Variables.
+* rl_basic_word_break_characters: Completion Variables.
+* rl_begin_undo_group: Allowing Undoing.
+* rl_bind_key: Binding Keys.
+* rl_bind_key_in_map: Binding Keys.
+* rl_binding_keymap: Readline Variables.
+* rl_callback_handler_install: Alternate Interface.
+* rl_callback_handler_remove: Alternate Interface.
+* rl_callback_read_char: Alternate Interface.
+* rl_catch_signals: Readline Signal Handling.
+* rl_catch_sigwinch: Readline Signal Handling.
+* rl_char_is_quoted_p: Completion Variables.
+* rl_cleanup_after_signal: Readline Signal Handling.
+* rl_clear_message: Redisplay.
+* rl_clear_pending_input: Character Input.
+* rl_clear_signals: Readline Signal Handling.
+* rl_complete <1>: Completion Functions.
+* rl_complete: How Completing Works.
+* rl_complete_internal: Completion Functions.
+* rl_completer_quote_characters: Completion Variables.
+* rl_completer_word_break_characters: Completion Variables.
+* rl_completion_append_character: Completion Variables.
+* rl_completion_display_matches_hook: Completion Variables.
+* rl_completion_entry_function <1>: Completion Variables.
+* rl_completion_entry_function: How Completing Works.
+* rl_completion_matches: Completion Functions.
+* rl_completion_query_items: Completion Variables.
+* rl_completion_type: Completion Variables.
+* rl_copy_keymap: Keymaps.
+* rl_copy_text: Modifying Text.
+* rl_crlf: Redisplay.
+* rl_delete_text: Modifying Text.
+* rl_deprep_term_function: Readline Variables.
+* rl_deprep_terminal: Terminal Management.
+* rl_ding: Utility Functions.
+* rl_directory_completion_hook: Completion Variables.
+* rl_discard_keymap: Keymaps.
+* rl_dispatching: Readline Variables.
+* rl_display_match_list: Utility Functions.
+* rl_do_undo: Allowing Undoing.
+* rl_done: Readline Variables.
+* rl_editing_mode: Readline Variables.
+* rl_end: Readline Variables.
+* rl_end_undo_group: Allowing Undoing.
+* rl_erase_empty_line: Readline Variables.
+* rl_event_hook: Readline Variables.
+* rl_execute_next: Character Input.
+* rl_executing_keymap: Readline Variables.
+* rl_executing_macro: Readline Variables.
+* rl_expand_prompt: Redisplay.
+* rl_explicit_arg: Readline Variables.
+* rl_extend_line_buffer: Utility Functions.
+* rl_filename_completion_desired: Completion Variables.
+* rl_filename_completion_function: Completion Functions.
+* rl_filename_dequoting_function: Completion Variables.
+* rl_filename_quote_characters: Completion Variables.
+* rl_filename_quoting_desired: Completion Variables.
+* rl_filename_quoting_function: Completion Variables.
+* rl_forced_update_display: Redisplay.
+* rl_free_line_state: Readline Signal Handling.
+* rl_free_undo_list: Allowing Undoing.
+* rl_function_dumper: Associating Function Names and Bindings.
+* rl_function_of_keyseq: Associating Function Names and Bindings.
+* rl_funmap_names: Associating Function Names and Bindings.
+* rl_generic_bind: Binding Keys.
+* rl_get_keymap: Keymaps.
+* rl_get_keymap_by_name: Keymaps.
+* rl_get_keymap_name: Keymaps.
+* rl_get_screen_size: Readline Signal Handling.
+* rl_getc: Character Input.
+* rl_getc_function: Readline Variables.
+* rl_gnu_readline_p: Readline Variables.
+* rl_ignore_completion_duplicates: Completion Variables.
+* rl_ignore_some_completions_function: Completion Variables.
+* rl_inhibit_completion: Completion Variables.
+* rl_initialize: Utility Functions.
+* rl_insert_completions: Completion Functions.
+* rl_insert_text: Modifying Text.
+* rl_instream: Readline Variables.
+* rl_invoking_keyseqs: Associating Function Names and Bindings.
+* rl_invoking_keyseqs_in_map: Associating Function Names and Bindings.
+* rl_kill_text: Modifying Text.
+* rl_last_func: Readline Variables.
+* rl_library_version: Readline Variables.
+* rl_line_buffer: Readline Variables.
+* rl_list_funmap_names: Associating Function Names and Bindings.
+* rl_macro_bind: Miscellaneous Functions.
+* rl_macro_dumper: Miscellaneous Functions.
+* rl_make_bare_keymap: Keymaps.
+* rl_make_keymap: Keymaps.
+* rl_mark: Readline Variables.
+* rl_message: Redisplay.
+* rl_modifying: Allowing Undoing.
+* rl_named_function: Associating Function Names and Bindings.
+* rl_num_chars_to_read: Readline Variables.
+* rl_numeric_arg: Readline Variables.
+* rl_on_new_line: Redisplay.
+* rl_on_new_line_with_prompt: Redisplay.
+* rl_outstream: Readline Variables.
+* rl_parse_and_bind: Binding Keys.
+* rl_pending_input: Readline Variables.
+* rl_point: Readline Variables.
+* rl_possible_completions: Completion Functions.
+* rl_pre_input_hook: Readline Variables.
+* rl_prep_term_function: Readline Variables.
+* rl_prep_terminal: Terminal Management.
+* rl_prompt: Readline Variables.
+* rl_push_macro_input: Modifying Text.
+* rl_read_init_file: Binding Keys.
+* rl_read_key: Character Input.
+* rl_readline_name: Readline Variables.
+* rl_readline_state: Readline Variables.
+* rl_redisplay: Redisplay.
+* rl_redisplay_function: Readline Variables.
+* rl_reset_after_signal: Readline Signal Handling.
+* rl_reset_line_state: Redisplay.
+* rl_reset_terminal: Terminal Management.
+* rl_resize_terminal: Readline Signal Handling.
+* rl_restore_prompt: Redisplay.
+* rl_save_prompt: Redisplay.
+* rl_set_key: Binding Keys.
+* rl_set_keyboard_input_timeout: Character Input.
+* rl_set_keymap: Keymaps.
+* rl_set_paren_blink_timeout: Miscellaneous Functions.
+* rl_set_prompt: Redisplay.
+* rl_set_screen_size: Readline Signal Handling.
+* rl_set_signals: Readline Signal Handling.
+* rl_show_char: Redisplay.
+* rl_special_prefixes: Completion Variables.
+* rl_startup_hook: Readline Variables.
+* rl_stuff_char: Character Input.
+* rl_terminal_name: Readline Variables.
+* rl_tty_set_default_bindings: Terminal Management.
+* rl_unbind_command_in_map: Binding Keys.
+* rl_unbind_function_in_map: Binding Keys.
+* rl_unbind_key: Binding Keys.
+* rl_unbind_key_in_map: Binding Keys.
+* rl_username_completion_function: Completion Functions.
+* rl_variable_bind: Miscellaneous Functions.
+* rl_variable_dumper: Miscellaneous Functions.
+* self-insert (a, b, A, 1, !, ...): Commands For Text.
+* set-mark (C-@): Miscellaneous Commands.
+* show-all-if-ambiguous: Readline Init File Syntax.
+* start-kbd-macro (C-x (): Keyboard Macros.
+* transpose-chars (C-t): Commands For Text.
+* transpose-words (M-t): Commands For Text.
+* undo (C-_ or C-x C-u): Miscellaneous Commands.
+* universal-argument (): Numeric Arguments.
+* unix-line-discard (C-u): Commands For Killing.
+* unix-word-rubout (C-w): Commands For Killing.
+* upcase-word (M-u): Commands For Text.
+* visible-stats: Readline Init File Syntax.
+* yank (C-y): Commands For Killing.
+* yank-last-arg (M-. or M-_): Commands For History.
+* yank-nth-arg (M-C-y): Commands For History.
+* yank-pop (M-y): Commands For Killing.
+
+
+
+Tag Table:
+Node: Top1164
+Node: Command Line Editing1763
+Node: Introduction and Notation2414
+Node: Readline Interaction4032
+Node: Readline Bare Essentials5219
+Node: Readline Movement Commands7000
+Node: Readline Killing Commands7957
+Node: Readline Arguments9867
+Node: Searching10903
+Node: Readline Init File12859
+Node: Readline Init File Syntax13920
+Node: Conditional Init Constructs23842
+Node: Sample Init File26367
+Node: Bindable Readline Commands29537
+Node: Commands For Moving30587
+Node: Commands For History31436
+Node: Commands For Text34294
+Node: Commands For Killing36281
+Node: Numeric Arguments38232
+Node: Commands For Completion39360
+Node: Keyboard Macros40892
+Node: Miscellaneous Commands41451
+Node: Readline vi Mode44244
+Node: Programming with GNU Readline46062
+Node: Basic Behavior47030
+Node: Custom Functions50443
+Node: Readline Typedefs51421
+Node: Function Writing53050
+Node: Readline Variables54134
+Node: Readline Convenience Functions63133
+Node: Function Naming64115
+Node: Keymaps65367
+Node: Binding Keys67123
+Node: Associating Function Names and Bindings70049
+Node: Allowing Undoing72294
+Node: Redisplay74829
+Node: Modifying Text77900
+Node: Character Input79033
+Node: Terminal Management80678
+Node: Utility Functions81853
+Node: Miscellaneous Functions83920
+Node: Alternate Interface85512
+Node: A Readline Example87135
+Node: Readline Signal Handling89072
+Node: Custom Completers94675
+Node: How Completing Works95390
+Node: Completion Functions98388
+Node: Completion Variables101392
+Node: A Short Completion Example110763
+Node: Concept Index123288
+Node: Function and Variable Index124110
+
+End Tag Table
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+22 b Fu(17)224 1485 y(1.5)45 b(Readline)16 b(vi)g(Mo)q(de)e
+Fl(.)7 b(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)
+f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f
+(.)h(.)f(.)h(.)28 b Fu(18)75 1606 y Fs(2)67 b(Programming)23
+b(with)g(GNU)f(Readline)12 b Fa(.)f(.)g(.)f(.)g(.)g(.)g(.)h(.)f(.)35
+b Fs(19)224 1675 y Fu(2.1)45 b(Basic)16 b(Beha)o(vior)8
+b Fl(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)
+f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f
+(.)h(.)f(.)h(.)f(.)h(.)f(.)23 b Fu(19)224 1729 y(2.2)45
+b(Custom)14 b(F)l(unctions)7 b Fl(.)i(.)f(.)f(.)h(.)f(.)h(.)f(.)h(.)f
+(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)
+f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)22 b Fu(20)374
+1784 y(2.2.1)44 b(Readline)16 b(T)o(yp)q(edefs)9 b Fl(.)g(.)e(.)h(.)f
+(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)
+f(.)h(.)f(.)h(.)g(.)f(.)h(.)24 b Fu(20)374 1839 y(2.2.2)44
+b(W)l(riting)16 b(a)e(New)i(F)l(unction)6 b Fl(.)i(.)f(.)h(.)f(.)h(.)f
+(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)
+21 b Fu(21)224 1894 y(2.3)45 b(Readline)16 b(V)l(ariables)g
+Fl(.)8 b(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)
+h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g
+(.)f(.)h(.)29 b Fu(22)224 1949 y(2.4)45 b(Readline)16
+b(Con)o(v)o(enience)h(F)l(unctions)7 b Fl(.)i(.)e(.)h(.)f(.)h(.)f(.)h
+(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)
+23 b Fu(26)374 2003 y(2.4.1)44 b(Naming)15 b(a)g(F)l(unction)e
+Fl(.)7 b(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)
+h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)27 b Fu(26)374
+2058 y(2.4.2)44 b(Selecting)17 b(a)e(Keymap)6 b Fl(.)h(.)h(.)g(.)f(.)h
+(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)
+h(.)f(.)h(.)f(.)h(.)21 b Fu(26)374 2113 y(2.4.3)44 b(Binding)17
+b(Keys)5 b Fl(.)j(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f
+(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)
+h(.)f(.)20 b Fu(27)374 2168 y(2.4.4)44 b(Asso)q(ciating)16
+b(F)l(unction)g(Names)f(and)g(Bindings)8 b Fl(.)h(.)f(.)f(.)h(.)f(.)h
+(.)23 b Fu(28)374 2222 y(2.4.5)44 b(Allo)o(wing)16 b(Undoing)f
+Fl(.)8 b(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)
+f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)29 b
+Fu(29)374 2277 y(2.4.6)44 b(Redispla)o(y)10 b Fl(.)e(.)g(.)g(.)f(.)h(.)
+f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h
+(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)26
+b Fu(30)374 2332 y(2.4.7)44 b(Mo)q(difying)16 b(T)l(ext)7
+b Fl(.)g(.)g(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)
+f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)22
+b Fu(31)374 2387 y(2.4.8)44 b(Character)14 b(Input)c
+Fl(.)f(.)e(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h
+(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)25
+b Fu(32)374 2442 y(2.4.9)44 b(T)l(erminal)16 b(Managemen)o(t)11
+b Fl(.)c(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)
+h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)27 b Fu(32)374 2496 y(2.4.10)43
+b(Utilit)o(y)17 b(F)l(unctions)c Fl(.)7 b(.)h(.)g(.)f(.)h(.)f(.)h(.)f
+(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)
+f(.)h(.)f(.)28 b Fu(33)374 2551 y(2.4.11)43 b(Miscellaneous)18
+b(F)l(unctions)6 b Fl(.)i(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h
+(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)21 b Fu(34)374
+2606 y(2.4.12)43 b(Alternate)16 b(In)o(terface)f Fl(.)7
+b(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f
+(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)30 b Fu(35)374 2661
+y(2.4.13)43 b(A)16 b(Readline)g(Example)9 b Fl(.)f(.)f(.)h(.)f(.)h(.)g
+(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)
+h(.)f(.)24 b Fu(35)p eop
+%%Page: -2 62
+-2 61 bop 75 -58 a Fu(ii)1321 b(GNU)15 b(Readline)h(Library)224
+42 y(2.5)45 b(Readline)16 b(Signal)h(Handling)12 b Fl(.)c(.)g(.)f(.)h
+(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)
+f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)27 b Fu(36)224 96
+y(2.6)45 b(Custom)14 b(Completers)f Fl(.)8 b(.)f(.)h(.)f(.)h(.)f(.)h(.)
+f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f
+(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)28 b Fu(38)374
+151 y(2.6.1)44 b(Ho)o(w)14 b(Completing)i(W)l(orks)10
+b Fl(.)d(.)g(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)
+f(.)h(.)f(.)h(.)f(.)h(.)f(.)25 b Fu(38)374 206 y(2.6.2)44
+b(Completion)16 b(F)l(unctions)6 b Fl(.)i(.)g(.)f(.)h(.)f(.)h(.)f(.)h
+(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)
+21 b Fu(39)374 261 y(2.6.3)44 b(Completion)16 b(V)l(ariables)c
+Fl(.)c(.)f(.)h(.)g(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f
+(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)27 b Fu(40)374 315
+y(2.6.4)44 b(A)15 b(Short)g(Completion)h(Example)5 b
+Fl(.)j(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h(.)f(.)h
+(.)f(.)20 b Fu(43)75 437 y Fs(Concept)i(Index)10 b Fa(.)i(.)e(.)g(.)g
+(.)g(.)h(.)f(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)h(.)f(.)
+g(.)g(.)g(.)h(.)f(.)g(.)g(.)h(.)f(.)33 b Fs(53)75 572
+y(F)-6 b(unction)25 b(and)d(V)-6 b(ariable)24 b(Index)9
+b Fa(.)i(.)f(.)g(.)h(.)f(.)g(.)g(.)h(.)f(.)g(.)g(.)g(.)h(.)f(.)g(.)g(.)
+g(.)32 b Fs(55)p eop
+%%Trailer
+end
+userdict /end-hook known{end-hook}if
+%%EOF
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+<HTML>
+<HEAD>
+<!-- This HTML file has been created by texi2html 1.52
+ from /usr/homes/chet/src/bash/readline-src/doc/rluserman.texinfo on 16 April 2001 -->
+
+<TITLE>GNU Readline Library</TITLE>
+</HEAD>
+<BODY>
+<H1>GNU Readline Library User Interface</H1>
+<H2>Edition 4.2, for <CODE>Readline Library</CODE> Version 4.2.</H2>
+<H2>Apr 2001</H2>
+<ADDRESS>Brian Fox, Free Software Foundation</ADDRESS>
+<ADDRESS>Chet Ramey, Case Western Reserve University</ADDRESS>
+<P>
+<P><HR><P>
+<H1>Table of Contents</H1>
+<UL>
+<LI><A NAME="TOC1" HREF="rluserman.html#SEC1">Command Line Editing</A>
+<UL>
+<LI><A NAME="TOC2" HREF="rluserman.html#SEC2">Introduction to Line Editing</A>
+<LI><A NAME="TOC3" HREF="rluserman.html#SEC3">Readline Interaction</A>
+<UL>
+<LI><A NAME="TOC4" HREF="rluserman.html#SEC4">Readline Bare Essentials</A>
+<LI><A NAME="TOC5" HREF="rluserman.html#SEC5">Readline Movement Commands</A>
+<LI><A NAME="TOC6" HREF="rluserman.html#SEC6">Readline Killing Commands</A>
+<LI><A NAME="TOC7" HREF="rluserman.html#SEC7">Readline Arguments</A>
+<LI><A NAME="TOC8" HREF="rluserman.html#SEC8">Searching for Commands in the History</A>
+</UL>
+<LI><A NAME="TOC9" HREF="rluserman.html#SEC9">Readline Init File</A>
+<UL>
+<LI><A NAME="TOC10" HREF="rluserman.html#SEC10">Readline Init File Syntax</A>
+<LI><A NAME="TOC11" HREF="rluserman.html#SEC11">Conditional Init Constructs</A>
+<LI><A NAME="TOC12" HREF="rluserman.html#SEC12">Sample Init File</A>
+</UL>
+<LI><A NAME="TOC13" HREF="rluserman.html#SEC13">Bindable Readline Commands</A>
+<UL>
+<LI><A NAME="TOC14" HREF="rluserman.html#SEC14">Commands For Moving</A>
+<LI><A NAME="TOC15" HREF="rluserman.html#SEC15">Commands For Manipulating The History</A>
+<LI><A NAME="TOC16" HREF="rluserman.html#SEC16">Commands For Changing Text</A>
+<LI><A NAME="TOC17" HREF="rluserman.html#SEC17">Killing And Yanking</A>
+<LI><A NAME="TOC18" HREF="rluserman.html#SEC18">Specifying Numeric Arguments</A>
+<LI><A NAME="TOC19" HREF="rluserman.html#SEC19">Letting Readline Type For You</A>
+<LI><A NAME="TOC20" HREF="rluserman.html#SEC20">Keyboard Macros</A>
+<LI><A NAME="TOC21" HREF="rluserman.html#SEC21">Some Miscellaneous Commands</A>
+</UL>
+<LI><A NAME="TOC22" HREF="rluserman.html#SEC22">Readline vi Mode</A>
+</UL>
+</UL>
+<P><HR><P>
+
+<P>
+This document describes the end user interface of the GNU Readline Library,
+a utility which aids in the consistency of user interface across discrete
+programs that need to provide a command line interface.
+
+</P>
+<P>
+Published by the Free Software Foundation <BR>
+59 Temple Place, Suite 330, <BR>
+Boston, MA 02111 USA
+
+</P>
+<P>
+Permission is granted to make and distribute verbatim copies of
+this manual provided the copyright notice and this permission notice
+are preserved on all copies.
+
+</P>
+<P>
+Permission is granted to copy and distribute modified versions of this
+manual under the conditions for verbatim copying, provided that the entire
+resulting derived work is distributed under the terms of a permission
+notice identical to this one.
+
+</P>
+<P>
+Permission is granted to copy and distribute translations of this manual
+into another language, under the above conditions for modified versions,
+except that this permission notice may be stated in a translation approved
+by the Free Software Foundation.
+
+</P>
+<P>
+Copyright (C) 1988-2001 Free Software Foundation, Inc.
+
+</P>
+
+
+
+<H1><A NAME="SEC1" HREF="rluserman.html#TOC1">Command Line Editing</A></H1>
+
+<P>
+This chapter describes the basic features of the GNU
+command line editing interface.
+
+</P>
+
+<UL>
+<LI><A HREF="rluserman.html#SEC2">Introduction and Notation</A>: Notation used in this text.
+<LI><A HREF="rluserman.html#SEC3">Readline Interaction</A>: The minimum set of commands for editing a line.
+<LI><A HREF="rluserman.html#SEC9">Readline Init File</A>: Customizing Readline from a user's view.
+<LI><A HREF="rluserman.html#SEC13">Bindable Readline Commands</A>: A description of most of the Readline commands
+ available for binding
+<LI><A HREF="rluserman.html#SEC22">Readline vi Mode</A>: A short description of how to make Readline
+ behave like the vi editor.
+</UL>
+
+
+
+<H2><A NAME="SEC2" HREF="rluserman.html#TOC2">Introduction to Line Editing</A></H2>
+
+<P>
+The following paragraphs describe the notation used to represent
+keystrokes.
+
+</P>
+<P>
+The text <KBD>C-k</KBD> is read as `Control-K' and describes the character
+produced when the <KBD>k</KBD> key is pressed while the Control key
+is depressed.
+
+</P>
+<P>
+The text <KBD>M-k</KBD> is read as `Meta-K' and describes the character
+produced when the Meta key (if you have one) is depressed, and the <KBD>k</KBD>
+key is pressed.
+The Meta key is labeled <KBD>ALT</KBD> on many keyboards.
+On keyboards with two keys labeled <KBD>ALT</KBD> (usually to either side of
+the space bar), the <KBD>ALT</KBD> on the left side is generally set to
+work as a Meta key.
+The <KBD>ALT</KBD> key on the right may also be configured to work as a
+Meta key or may be configured as some other modifier, such as a
+Compose key for typing accented characters.
+
+</P>
+<P>
+If you do not have a Meta or <KBD>ALT</KBD> key, or another key working as
+a Meta key, the identical keystroke can be generated by typing <KBD>ESC</KBD>
+<EM>first</EM>, and then typing <KBD>k</KBD>.
+Either process is known as <EM>metafying</EM> the <KBD>k</KBD> key.
+
+</P>
+<P>
+The text <KBD>M-C-k</KBD> is read as `Meta-Control-k' and describes the
+character produced by <EM>metafying</EM> <KBD>C-k</KBD>.
+
+</P>
+<P>
+In addition, several keys have their own names. Specifically,
+<KBD>DEL</KBD>, <KBD>ESC</KBD>, <KBD>LFD</KBD>, <KBD>SPC</KBD>, <KBD>RET</KBD>, and <KBD>TAB</KBD> all
+stand for themselves when seen in this text, or in an init file
+(see section <A HREF="rluserman.html#SEC9">Readline Init File</A>).
+If your keyboard lacks a <KBD>LFD</KBD> key, typing <KBD>C-j</KBD> will
+produce the desired character.
+The <KBD>RET</KBD> key may be labeled <KBD>Return</KBD> or <KBD>Enter</KBD> on
+some keyboards.
+
+</P>
+
+
+<H2><A NAME="SEC3" HREF="rluserman.html#TOC3">Readline Interaction</A></H2>
+<P>
+<A NAME="IDX1"></A>
+
+</P>
+<P>
+Often during an interactive session you type in a long line of text,
+only to notice that the first word on the line is misspelled. The
+Readline library gives you a set of commands for manipulating the text
+as you type it in, allowing you to just fix your typo, and not forcing
+you to retype the majority of the line. Using these editing commands,
+you move the cursor to the place that needs correction, and delete or
+insert the text of the corrections. Then, when you are satisfied with
+the line, you simply press <KBD>RET</KBD>. You do not have to be at the
+end of the line to press <KBD>RET</KBD>; the entire line is accepted
+regardless of the location of the cursor within the line.
+
+</P>
+
+<UL>
+<LI><A HREF="rluserman.html#SEC4">Readline Bare Essentials</A>: The least you need to know about Readline.
+<LI><A HREF="rluserman.html#SEC5">Readline Movement Commands</A>: Moving about the input line.
+<LI><A HREF="rluserman.html#SEC6">Readline Killing Commands</A>: How to delete text, and how to get it back!
+<LI><A HREF="rluserman.html#SEC7">Readline Arguments</A>: Giving numeric arguments to commands.
+<LI><A HREF="rluserman.html#SEC8">Searching</A>: Searching through previous lines.
+</UL>
+
+
+
+<H3><A NAME="SEC4" HREF="rluserman.html#TOC4">Readline Bare Essentials</A></H3>
+<P>
+<A NAME="IDX2"></A>
+<A NAME="IDX3"></A>
+<A NAME="IDX4"></A>
+
+</P>
+<P>
+In order to enter characters into the line, simply type them. The typed
+character appears where the cursor was, and then the cursor moves one
+space to the right. If you mistype a character, you can use your
+erase character to back up and delete the mistyped character.
+
+</P>
+<P>
+Sometimes you may mistype a character, and
+not notice the error until you have typed several other characters. In
+that case, you can type <KBD>C-b</KBD> to move the cursor to the left, and then
+correct your mistake. Afterwards, you can move the cursor to the right
+with <KBD>C-f</KBD>.
+
+</P>
+<P>
+When you add text in the middle of a line, you will notice that characters
+to the right of the cursor are `pushed over' to make room for the text
+that you have inserted. Likewise, when you delete text behind the cursor,
+characters to the right of the cursor are `pulled back' to fill in the
+blank space created by the removal of the text. A list of the bare
+essentials for editing the text of an input line follows.
+
+</P>
+<DL COMPACT>
+
+<DT><KBD>C-b</KBD>
+<DD>
+Move back one character.
+<DT><KBD>C-f</KBD>
+<DD>
+Move forward one character.
+<DT><KBD>DEL</KBD> or <KBD>Backspace</KBD>
+<DD>
+Delete the character to the left of the cursor.
+<DT><KBD>C-d</KBD>
+<DD>
+Delete the character underneath the cursor.
+<DT>Printing characters
+<DD>
+Insert the character into the line at the cursor.
+<DT><KBD>C-_</KBD> or <KBD>C-x C-u</KBD>
+<DD>
+Undo the last editing command. You can undo all the way back to an
+empty line.
+</DL>
+
+<P>
+(Depending on your configuration, the <KBD>Backspace</KBD> key be set to
+delete the character to the left of the cursor and the <KBD>DEL</KBD> key set
+to delete the character underneath the cursor, like <KBD>C-d</KBD>, rather
+than the character to the left of the cursor.)
+
+</P>
+
+
+<H3><A NAME="SEC5" HREF="rluserman.html#TOC5">Readline Movement Commands</A></H3>
+
+<P>
+The above table describes the most basic keystrokes that you need
+in order to do editing of the input line. For your convenience, many
+other commands have been added in addition to <KBD>C-b</KBD>, <KBD>C-f</KBD>,
+<KBD>C-d</KBD>, and <KBD>DEL</KBD>. Here are some commands for moving more rapidly
+about the line.
+
+</P>
+<DL COMPACT>
+
+<DT><KBD>C-a</KBD>
+<DD>
+Move to the start of the line.
+<DT><KBD>C-e</KBD>
+<DD>
+Move to the end of the line.
+<DT><KBD>M-f</KBD>
+<DD>
+Move forward a word, where a word is composed of letters and digits.
+<DT><KBD>M-b</KBD>
+<DD>
+Move backward a word.
+<DT><KBD>C-l</KBD>
+<DD>
+Clear the screen, reprinting the current line at the top.
+</DL>
+
+<P>
+Notice how <KBD>C-f</KBD> moves forward a character, while <KBD>M-f</KBD> moves
+forward a word. It is a loose convention that control keystrokes
+operate on characters while meta keystrokes operate on words.
+
+</P>
+
+
+<H3><A NAME="SEC6" HREF="rluserman.html#TOC6">Readline Killing Commands</A></H3>
+
+<P>
+<A NAME="IDX5"></A>
+<A NAME="IDX6"></A>
+
+</P>
+<P>
+<EM>Killing</EM> text means to delete the text from the line, but to save
+it away for later use, usually by <EM>yanking</EM> (re-inserting)
+it back into the line.
+(`Cut' and `paste' are more recent jargon for `kill' and `yank'.)
+
+</P>
+<P>
+If the description for a command says that it `kills' text, then you can
+be sure that you can get the text back in a different (or the same)
+place later.
+
+</P>
+<P>
+When you use a kill command, the text is saved in a <EM>kill-ring</EM>.
+Any number of consecutive kills save all of the killed text together, so
+that when you yank it back, you get it all. The kill
+ring is not line specific; the text that you killed on a previously
+typed line is available to be yanked back later, when you are typing
+another line.
+<A NAME="IDX7"></A>
+
+</P>
+<P>
+Here is the list of commands for killing text.
+
+</P>
+<DL COMPACT>
+
+<DT><KBD>C-k</KBD>
+<DD>
+Kill the text from the current cursor position to the end of the line.
+
+<DT><KBD>M-d</KBD>
+<DD>
+Kill from the cursor to the end of the current word, or, if between
+words, to the end of the next word.
+Word boundaries are the same as those used by <KBD>M-f</KBD>.
+
+<DT><KBD>M-<KBD>DEL</KBD></KBD>
+<DD>
+Kill from the cursor the start of the previous word, or, if between
+words, to the start of the previous word.
+Word boundaries are the same as those used by <KBD>M-b</KBD>.
+
+<DT><KBD>C-w</KBD>
+<DD>
+Kill from the cursor to the previous whitespace. This is different than
+<KBD>M-<KBD>DEL</KBD></KBD> because the word boundaries differ.
+
+</DL>
+
+<P>
+Here is how to <EM>yank</EM> the text back into the line. Yanking
+means to copy the most-recently-killed text from the kill buffer.
+
+</P>
+<DL COMPACT>
+
+<DT><KBD>C-y</KBD>
+<DD>
+Yank the most recently killed text back into the buffer at the cursor.
+
+<DT><KBD>M-y</KBD>
+<DD>
+Rotate the kill-ring, and yank the new top. You can only do this if
+the prior command is <KBD>C-y</KBD> or <KBD>M-y</KBD>.
+</DL>
+
+
+
+<H3><A NAME="SEC7" HREF="rluserman.html#TOC7">Readline Arguments</A></H3>
+
+<P>
+You can pass numeric arguments to Readline commands. Sometimes the
+argument acts as a repeat count, other times it is the <I>sign</I> of the
+argument that is significant. If you pass a negative argument to a
+command which normally acts in a forward direction, that command will
+act in a backward direction. For example, to kill text back to the
+start of the line, you might type <SAMP>`M-- C-k'</SAMP>.
+
+</P>
+<P>
+The general way to pass numeric arguments to a command is to type meta
+digits before the command. If the first `digit' typed is a minus
+sign (<SAMP>`-'</SAMP>), then the sign of the argument will be negative. Once
+you have typed one meta digit to get the argument started, you can type
+the remainder of the digits, and then the command. For example, to give
+the <KBD>C-d</KBD> command an argument of 10, you could type <SAMP>`M-1 0 C-d'</SAMP>,
+which will delete the next ten characters on the input line.
+
+</P>
+
+
+<H3><A NAME="SEC8" HREF="rluserman.html#TOC8">Searching for Commands in the History</A></H3>
+
+<P>
+Readline provides commands for searching through the command history
+for lines containing a specified string.
+There are two search modes: <EM>incremental</EM> and <EM>non-incremental</EM>.
+
+</P>
+<P>
+Incremental searches begin before the user has finished typing the
+search string.
+As each character of the search string is typed, Readline displays
+the next entry from the history matching the string typed so far.
+An incremental search requires only as many characters as needed to
+find the desired history entry.
+To search backward in the history for a particular string, type
+<KBD>C-r</KBD>. Typing <KBD>C-s</KBD> searches forward through the history.
+The characters present in the value of the <CODE>isearch-terminators</CODE> variable
+are used to terminate an incremental search.
+If that variable has not been assigned a value, the <KBD>ESC</KBD> and
+<KBD>C-J</KBD> characters will terminate an incremental search.
+<KBD>C-g</KBD> will abort an incremental search and restore the original line.
+When the search is terminated, the history entry containing the
+search string becomes the current line.
+
+</P>
+<P>
+To find other matching entries in the history list, type <KBD>C-r</KBD> or
+<KBD>C-s</KBD> as appropriate.
+This will search backward or forward in the history for the next
+entry matching the search string typed so far.
+Any other key sequence bound to a Readline command will terminate
+the search and execute that command.
+For instance, a <KBD>RET</KBD> will terminate the search and accept
+the line, thereby executing the command from the history list.
+A movement command will terminate the search, make the last line found
+the current line, and begin editing.
+
+</P>
+<P>
+Non-incremental searches read the entire search string before starting
+to search for matching history lines. The search string may be
+typed by the user or be part of the contents of the current line.
+
+</P>
+
+
+<H2><A NAME="SEC9" HREF="rluserman.html#TOC9">Readline Init File</A></H2>
+<P>
+<A NAME="IDX8"></A>
+
+</P>
+<P>
+Although the Readline library comes with a set of Emacs-like
+keybindings installed by default, it is possible to use a different set
+of keybindings.
+Any user can customize programs that use Readline by putting
+commands in an <EM>inputrc</EM> file, conventionally in his home directory.
+The name of this
+file is taken from the value of the environment variable @env{INPUTRC}. If
+that variable is unset, the default is <TT>`~/.inputrc'</TT>.
+
+</P>
+<P>
+When a program which uses the Readline library starts up, the
+init file is read, and the key bindings are set.
+
+</P>
+<P>
+In addition, the <CODE>C-x C-r</CODE> command re-reads this init file, thus
+incorporating any changes that you might have made to it.
+
+</P>
+
+<UL>
+<LI><A HREF="rluserman.html#SEC10">Readline Init File Syntax</A>: Syntax for the commands in the inputrc file.
+
+<LI><A HREF="rluserman.html#SEC11">Conditional Init Constructs</A>: Conditional key bindings in the inputrc file.
+
+<LI><A HREF="rluserman.html#SEC12">Sample Init File</A>: An example inputrc file.
+</UL>
+
+
+
+<H3><A NAME="SEC10" HREF="rluserman.html#TOC10">Readline Init File Syntax</A></H3>
+
+<P>
+There are only a few basic constructs allowed in the
+Readline init file. Blank lines are ignored.
+Lines beginning with a <SAMP>`#'</SAMP> are comments.
+Lines beginning with a <SAMP>`$'</SAMP> indicate conditional
+constructs (see section <A HREF="rluserman.html#SEC11">Conditional Init Constructs</A>). Other lines
+denote variable settings and key bindings.
+
+</P>
+<DL COMPACT>
+
+<DT>Variable Settings
+<DD>
+You can modify the run-time behavior of Readline by
+altering the values of variables in Readline
+using the <CODE>set</CODE> command within the init file.
+The syntax is simple:
+
+
+<PRE>
+set <VAR>variable</VAR> <VAR>value</VAR>
+</PRE>
+
+Here, for example, is how to
+change from the default Emacs-like key binding to use
+<CODE>vi</CODE> line editing commands:
+
+
+<PRE>
+set editing-mode vi
+</PRE>
+
+Variable names and values, where appropriate, are recognized without regard
+to case.
+
+A great deal of run-time behavior is changeable with the following
+variables.
+
+<A NAME="IDX9"></A>
+<DL COMPACT>
+
+<DT><CODE>bell-style</CODE>
+<DD>
+<A NAME="IDX10"></A>
+Controls what happens when Readline wants to ring the terminal bell.
+If set to <SAMP>`none'</SAMP>, Readline never rings the bell. If set to
+<SAMP>`visible'</SAMP>, Readline uses a visible bell if one is available.
+If set to <SAMP>`audible'</SAMP> (the default), Readline attempts to ring
+the terminal's bell.
+
+<DT><CODE>comment-begin</CODE>
+<DD>
+<A NAME="IDX11"></A>
+The string to insert at the beginning of the line when the
+<CODE>insert-comment</CODE> command is executed. The default value
+is <CODE>"#"</CODE>.
+
+<DT><CODE>completion-ignore-case</CODE>
+<DD>
+If set to <SAMP>`on'</SAMP>, Readline performs filename matching and completion
+in a case-insensitive fashion.
+The default value is <SAMP>`off'</SAMP>.
+
+<DT><CODE>completion-query-items</CODE>
+<DD>
+<A NAME="IDX12"></A>
+The number of possible completions that determines when the user is
+asked whether he wants to see the list of possibilities. If the
+number of possible completions is greater than this value,
+Readline will ask the user whether or not he wishes to view
+them; otherwise, they are simply listed.
+This variable must be set to an integer value greater than or equal to 0.
+The default limit is <CODE>100</CODE>.
+
+<DT><CODE>convert-meta</CODE>
+<DD>
+<A NAME="IDX13"></A>
+If set to <SAMP>`on'</SAMP>, Readline will convert characters with the
+eighth bit set to an ASCII key sequence by stripping the eighth
+bit and prefixing an <KBD>ESC</KBD> character, converting them to a
+meta-prefixed key sequence. The default value is <SAMP>`on'</SAMP>.
+
+<DT><CODE>disable-completion</CODE>
+<DD>
+<A NAME="IDX14"></A>
+If set to <SAMP>`On'</SAMP>, Readline will inhibit word completion.
+Completion characters will be inserted into the line as if they had
+been mapped to <CODE>self-insert</CODE>. The default is <SAMP>`off'</SAMP>.
+
+<DT><CODE>editing-mode</CODE>
+<DD>
+<A NAME="IDX15"></A>
+The <CODE>editing-mode</CODE> variable controls which default set of
+key bindings is used. By default, Readline starts up in Emacs editing
+mode, where the keystrokes are most similar to Emacs. This variable can be
+set to either <SAMP>`emacs'</SAMP> or <SAMP>`vi'</SAMP>.
+
+<DT><CODE>enable-keypad</CODE>
+<DD>
+<A NAME="IDX16"></A>
+When set to <SAMP>`on'</SAMP>, Readline will try to enable the application
+keypad when it is called. Some systems need this to enable the
+arrow keys. The default is <SAMP>`off'</SAMP>.
+
+<DT><CODE>expand-tilde</CODE>
+<DD>
+<A NAME="IDX17"></A>
+If set to <SAMP>`on'</SAMP>, tilde expansion is performed when Readline
+attempts word completion. The default is <SAMP>`off'</SAMP>.
+
+<DT><CODE>horizontal-scroll-mode</CODE>
+<DD>
+<A NAME="IDX18"></A>
+This variable can be set to either <SAMP>`on'</SAMP> or <SAMP>`off'</SAMP>. Setting it
+to <SAMP>`on'</SAMP> means that the text of the lines being edited will scroll
+horizontally on a single screen line when they are longer than the width
+of the screen, instead of wrapping onto a new screen line. By default,
+this variable is set to <SAMP>`off'</SAMP>.
+
+<DT><CODE>input-meta</CODE>
+<DD>
+<A NAME="IDX19"></A>
+<A NAME="IDX20"></A>
+If set to <SAMP>`on'</SAMP>, Readline will enable eight-bit input (it
+will not clear the eighth bit in the characters it reads),
+regardless of what the terminal claims it can support. The
+default value is <SAMP>`off'</SAMP>. The name <CODE>meta-flag</CODE> is a
+synonym for this variable.
+
+<DT><CODE>isearch-terminators</CODE>
+<DD>
+<A NAME="IDX21"></A>
+The string of characters that should terminate an incremental search without
+subsequently executing the character as a command (see section <A HREF="rluserman.html#SEC8">Searching for Commands in the History</A>).
+If this variable has not been given a value, the characters <KBD>ESC</KBD> and
+<KBD>C-J</KBD> will terminate an incremental search.
+
+<DT><CODE>keymap</CODE>
+<DD>
+<A NAME="IDX22"></A>
+Sets Readline's idea of the current keymap for key binding commands.
+Acceptable <CODE>keymap</CODE> names are
+<CODE>emacs</CODE>,
+<CODE>emacs-standard</CODE>,
+<CODE>emacs-meta</CODE>,
+<CODE>emacs-ctlx</CODE>,
+<CODE>vi</CODE>,
+<CODE>vi-move</CODE>,
+<CODE>vi-command</CODE>, and
+<CODE>vi-insert</CODE>.
+<CODE>vi</CODE> is equivalent to <CODE>vi-command</CODE>; <CODE>emacs</CODE> is
+equivalent to <CODE>emacs-standard</CODE>. The default value is <CODE>emacs</CODE>.
+The value of the <CODE>editing-mode</CODE> variable also affects the
+default keymap.
+
+<DT><CODE>mark-directories</CODE>
+<DD>
+If set to <SAMP>`on'</SAMP>, completed directory names have a slash
+appended. The default is <SAMP>`on'</SAMP>.
+
+<DT><CODE>mark-modified-lines</CODE>
+<DD>
+<A NAME="IDX23"></A>
+This variable, when set to <SAMP>`on'</SAMP>, causes Readline to display an
+asterisk (<SAMP>`*'</SAMP>) at the start of history lines which have been modified.
+This variable is <SAMP>`off'</SAMP> by default.
+
+<DT><CODE>output-meta</CODE>
+<DD>
+<A NAME="IDX24"></A>
+If set to <SAMP>`on'</SAMP>, Readline will display characters with the
+eighth bit set directly rather than as a meta-prefixed escape
+sequence. The default is <SAMP>`off'</SAMP>.
+
+<DT><CODE>print-completions-horizontally</CODE>
+<DD>
+If set to <SAMP>`on'</SAMP>, Readline will display completions with matches
+sorted horizontally in alphabetical order, rather than down the screen.
+The default is <SAMP>`off'</SAMP>.
+
+<DT><CODE>show-all-if-ambiguous</CODE>
+<DD>
+<A NAME="IDX25"></A>
+This alters the default behavior of the completion functions. If
+set to <SAMP>`on'</SAMP>,
+words which have more than one possible completion cause the
+matches to be listed immediately instead of ringing the bell.
+The default value is <SAMP>`off'</SAMP>.
+
+<DT><CODE>visible-stats</CODE>
+<DD>
+<A NAME="IDX26"></A>
+If set to <SAMP>`on'</SAMP>, a character denoting a file's type
+is appended to the filename when listing possible
+completions. The default is <SAMP>`off'</SAMP>.
+
+</DL>
+
+<DT>Key Bindings
+<DD>
+The syntax for controlling key bindings in the init file is
+simple. First you need to find the name of the command that you
+want to change. The following sections contain tables of the command
+name, the default keybinding, if any, and a short description of what
+the command does.
+
+Once you know the name of the command, simply place on a line
+in the init file the name of the key
+you wish to bind the command to, a colon, and then the name of the
+command. The name of the key
+can be expressed in different ways, depending on what you find most
+comfortable.
+
+In addition to command names, readline allows keys to be bound
+to a string that is inserted when the key is pressed (a <VAR>macro</VAR>).
+
+<DL COMPACT>
+
+<DT><VAR>keyname</VAR>: <VAR>function-name</VAR> or <VAR>macro</VAR>
+<DD>
+<VAR>keyname</VAR> is the name of a key spelled out in English. For example:
+
+<PRE>
+Control-u: universal-argument
+Meta-Rubout: backward-kill-word
+Control-o: "&#62; output"
+</PRE>
+
+In the above example, <KBD>C-u</KBD> is bound to the function
+<CODE>universal-argument</CODE>,
+<KBD>M-DEL</KBD> is bound to the function <CODE>backward-kill-word</CODE>, and
+<KBD>C-o</KBD> is bound to run the macro
+expressed on the right hand side (that is, to insert the text
+<SAMP>`&#62; output'</SAMP> into the line).
+
+A number of symbolic character names are recognized while
+processing this key binding syntax:
+<VAR>DEL</VAR>,
+<VAR>ESC</VAR>,
+<VAR>ESCAPE</VAR>,
+<VAR>LFD</VAR>,
+<VAR>NEWLINE</VAR>,
+<VAR>RET</VAR>,
+<VAR>RETURN</VAR>,
+<VAR>RUBOUT</VAR>,
+<VAR>SPACE</VAR>,
+<VAR>SPC</VAR>,
+and
+<VAR>TAB</VAR>.
+
+<DT>"<VAR>keyseq</VAR>": <VAR>function-name</VAR> or <VAR>macro</VAR>
+<DD>
+<VAR>keyseq</VAR> differs from <VAR>keyname</VAR> above in that strings
+denoting an entire key sequence can be specified, by placing
+the key sequence in double quotes. Some GNU Emacs style key
+escapes can be used, as in the following example, but the
+special character names are not recognized.
+
+
+<PRE>
+"\C-u": universal-argument
+"\C-x\C-r": re-read-init-file
+"\e[11~": "Function Key 1"
+</PRE>
+
+In the above example, <KBD>C-u</KBD> is again bound to the function
+<CODE>universal-argument</CODE> (just as it was in the first example),
+<SAMP>`<KBD>C-x</KBD> <KBD>C-r</KBD>'</SAMP> is bound to the function <CODE>re-read-init-file</CODE>,
+and <SAMP>`<KBD>ESC</KBD> <KBD>[</KBD> <KBD>1</KBD> <KBD>1</KBD> <KBD>~</KBD>'</SAMP> is bound to insert
+the text <SAMP>`Function Key 1'</SAMP>.
+
+</DL>
+
+The following GNU Emacs style escape sequences are available when
+specifying key sequences:
+
+<DL COMPACT>
+
+<DT><CODE><KBD>\C-</KBD></CODE>
+<DD>
+control prefix
+<DT><CODE><KBD>\M-</KBD></CODE>
+<DD>
+meta prefix
+<DT><CODE><KBD>\e</KBD></CODE>
+<DD>
+an escape character
+<DT><CODE><KBD>\\</KBD></CODE>
+<DD>
+backslash
+<DT><CODE><KBD>\"</KBD></CODE>
+<DD>
+<KBD>"</KBD>, a double quotation mark
+<DT><CODE><KBD>\'</KBD></CODE>
+<DD>
+<KBD>'</KBD>, a single quote or apostrophe
+</DL>
+
+In addition to the GNU Emacs style escape sequences, a second
+set of backslash escapes is available:
+
+<DL COMPACT>
+
+<DT><CODE>\a</CODE>
+<DD>
+alert (bell)
+<DT><CODE>\b</CODE>
+<DD>
+backspace
+<DT><CODE>\d</CODE>
+<DD>
+delete
+<DT><CODE>\f</CODE>
+<DD>
+form feed
+<DT><CODE>\n</CODE>
+<DD>
+newline
+<DT><CODE>\r</CODE>
+<DD>
+carriage return
+<DT><CODE>\t</CODE>
+<DD>
+horizontal tab
+<DT><CODE>\v</CODE>
+<DD>
+vertical tab
+<DT><CODE>\<VAR>nnn</VAR></CODE>
+<DD>
+the character whose ASCII code is the octal value <VAR>nnn</VAR>
+(one to three digits)
+<DT><CODE>\x<VAR>nnn</VAR></CODE>
+<DD>
+the character whose ASCII code is the hexadecimal value <VAR>nnn</VAR>
+(one to three digits)
+</DL>
+
+When entering the text of a macro, single or double quotes must
+be used to indicate a macro definition.
+Unquoted text is assumed to be a function name.
+In the macro body, the backslash escapes described above are expanded.
+Backslash will quote any other character in the macro text,
+including <SAMP>`"'</SAMP> and <SAMP>`''</SAMP>.
+For example, the following binding will make <SAMP>`<KBD>C-x</KBD> \'</SAMP>
+insert a single <SAMP>`\'</SAMP> into the line:
+
+<PRE>
+"\C-x\\": "\\"
+</PRE>
+
+</DL>
+
+
+
+<H3><A NAME="SEC11" HREF="rluserman.html#TOC11">Conditional Init Constructs</A></H3>
+
+<P>
+Readline implements a facility similar in spirit to the conditional
+compilation features of the C preprocessor which allows key
+bindings and variable settings to be performed as the result
+of tests. There are four parser directives used.
+
+</P>
+<DL COMPACT>
+
+<DT><CODE>$if</CODE>
+<DD>
+The <CODE>$if</CODE> construct allows bindings to be made based on the
+editing mode, the terminal being used, or the application using
+Readline. The text of the test extends to the end of the line;
+no characters are required to isolate it.
+
+<DL COMPACT>
+
+<DT><CODE>mode</CODE>
+<DD>
+The <CODE>mode=</CODE> form of the <CODE>$if</CODE> directive is used to test
+whether Readline is in <CODE>emacs</CODE> or <CODE>vi</CODE> mode.
+This may be used in conjunction
+with the <SAMP>`set keymap'</SAMP> command, for instance, to set bindings in
+the <CODE>emacs-standard</CODE> and <CODE>emacs-ctlx</CODE> keymaps only if
+Readline is starting out in <CODE>emacs</CODE> mode.
+
+<DT><CODE>term</CODE>
+<DD>
+The <CODE>term=</CODE> form may be used to include terminal-specific
+key bindings, perhaps to bind the key sequences output by the
+terminal's function keys. The word on the right side of the
+<SAMP>`='</SAMP> is tested against both the full name of the terminal and
+the portion of the terminal name before the first <SAMP>`-'</SAMP>. This
+allows <CODE>sun</CODE> to match both <CODE>sun</CODE> and <CODE>sun-cmd</CODE>,
+for instance.
+
+<DT><CODE>application</CODE>
+<DD>
+The <VAR>application</VAR> construct is used to include
+application-specific settings. Each program using the Readline
+library sets the <VAR>application name</VAR>, and you can test for
+a particular value.
+This could be used to bind key sequences to functions useful for
+a specific program. For instance, the following command adds a
+key sequence that quotes the current or previous word in Bash:
+
+<PRE>
+$if Bash
+# Quote the current or previous word
+"\C-xq": "\eb\"\ef\""
+$endif
+</PRE>
+
+</DL>
+
+<DT><CODE>$endif</CODE>
+<DD>
+This command, as seen in the previous example, terminates an
+<CODE>$if</CODE> command.
+
+<DT><CODE>$else</CODE>
+<DD>
+Commands in this branch of the <CODE>$if</CODE> directive are executed if
+the test fails.
+
+<DT><CODE>$include</CODE>
+<DD>
+This directive takes a single filename as an argument and reads commands
+and bindings from that file.
+For example, the following directive reads from <TT>`/etc/inputrc'</TT>:
+
+<PRE>
+$include /etc/inputrc
+</PRE>
+
+</DL>
+
+
+
+<H3><A NAME="SEC12" HREF="rluserman.html#TOC12">Sample Init File</A></H3>
+
+<P>
+Here is an example of an <VAR>inputrc</VAR> file. This illustrates key
+binding, variable assignment, and conditional syntax.
+
+</P>
+
+<PRE>
+# This file controls the behaviour of line input editing for
+# programs that use the Gnu Readline library. Existing programs
+# include FTP, Bash, and Gdb.
+#
+# You can re-read the inputrc file with C-x C-r.
+# Lines beginning with '#' are comments.
+#
+# First, include any systemwide bindings and variable assignments from
+# /etc/Inputrc
+$include /etc/Inputrc
+
+#
+# Set various bindings for emacs mode.
+
+set editing-mode emacs
+
+$if mode=emacs
+
+Meta-Control-h: backward-kill-word Text after the function name is ignored
+
+#
+# Arrow keys in keypad mode
+#
+#"\M-OD": backward-char
+#"\M-OC": forward-char
+#"\M-OA": previous-history
+#"\M-OB": next-history
+#
+# Arrow keys in ANSI mode
+#
+"\M-[D": backward-char
+"\M-[C": forward-char
+"\M-[A": previous-history
+"\M-[B": next-history
+#
+# Arrow keys in 8 bit keypad mode
+#
+#"\M-\C-OD": backward-char
+#"\M-\C-OC": forward-char
+#"\M-\C-OA": previous-history
+#"\M-\C-OB": next-history
+#
+# Arrow keys in 8 bit ANSI mode
+#
+#"\M-\C-[D": backward-char
+#"\M-\C-[C": forward-char
+#"\M-\C-[A": previous-history
+#"\M-\C-[B": next-history
+
+C-q: quoted-insert
+
+$endif
+
+# An old-style binding. This happens to be the default.
+TAB: complete
+
+# Macros that are convenient for shell interaction
+$if Bash
+# edit the path
+"\C-xp": "PATH=${PATH}\e\C-e\C-a\ef\C-f"
+# prepare to type a quoted word -- insert open and close double quotes
+# and move to just after the open quote
+"\C-x\"": "\"\"\C-b"
+# insert a backslash (testing backslash escapes in sequences and macros)
+"\C-x\\": "\\"
+# Quote the current or previous word
+"\C-xq": "\eb\"\ef\""
+# Add a binding to refresh the line, which is unbound
+"\C-xr": redraw-current-line
+# Edit variable on current line.
+"\M-\C-v": "\C-a\C-k$\C-y\M-\C-e\C-a\C-y="
+$endif
+
+# use a visible bell if one is available
+set bell-style visible
+
+# don't strip characters to 7 bits when reading
+set input-meta on
+
+# allow iso-latin1 characters to be inserted rather than converted to
+# prefix-meta sequences
+set convert-meta off
+
+# display characters with the eighth bit set directly rather than
+# as meta-prefixed characters
+set output-meta on
+
+# if there are more than 150 possible completions for a word, ask the
+# user if he wants to see all of them
+set completion-query-items 150
+
+# For FTP
+$if Ftp
+"\C-xg": "get \M-?"
+"\C-xt": "put \M-?"
+"\M-.": yank-last-arg
+$endif
+</PRE>
+
+
+
+<H2><A NAME="SEC13" HREF="rluserman.html#TOC13">Bindable Readline Commands</A></H2>
+
+
+<UL>
+<LI><A HREF="rluserman.html#SEC14">Commands For Moving</A>: Moving about the line.
+<LI><A HREF="rluserman.html#SEC15">Commands For History</A>: Getting at previous lines.
+<LI><A HREF="rluserman.html#SEC16">Commands For Text</A>: Commands for changing text.
+<LI><A HREF="rluserman.html#SEC17">Commands For Killing</A>: Commands for killing and yanking.
+<LI><A HREF="rluserman.html#SEC18">Numeric Arguments</A>: Specifying numeric arguments, repeat counts.
+<LI><A HREF="rluserman.html#SEC19">Commands For Completion</A>: Getting Readline to do the typing for you.
+<LI><A HREF="rluserman.html#SEC20">Keyboard Macros</A>: Saving and re-executing typed characters
+<LI><A HREF="rluserman.html#SEC21">Miscellaneous Commands</A>: Other miscellaneous commands.
+</UL>
+
+<P>
+This section describes Readline commands that may be bound to key
+sequences.
+Command names without an accompanying key sequence are unbound by default.
+
+</P>
+<P>
+In the following descriptions, <EM>point</EM> refers to the current cursor
+position, and <EM>mark</EM> refers to a cursor position saved by the
+<CODE>set-mark</CODE> command.
+The text between the point and mark is referred to as the <EM>region</EM>.
+
+</P>
+
+
+<H3><A NAME="SEC14" HREF="rluserman.html#TOC14">Commands For Moving</A></H3>
+<DL COMPACT>
+
+<DT><CODE>beginning-of-line (C-a)</CODE>
+<DD>
+<A NAME="IDX27"></A>
+Move to the start of the current line.
+
+<DT><CODE>end-of-line (C-e)</CODE>
+<DD>
+<A NAME="IDX28"></A>
+Move to the end of the line.
+
+<DT><CODE>forward-char (C-f)</CODE>
+<DD>
+<A NAME="IDX29"></A>
+Move forward a character.
+
+<DT><CODE>backward-char (C-b)</CODE>
+<DD>
+<A NAME="IDX30"></A>
+Move back a character.
+
+<DT><CODE>forward-word (M-f)</CODE>
+<DD>
+<A NAME="IDX31"></A>
+Move forward to the end of the next word. Words are composed of
+letters and digits.
+
+<DT><CODE>backward-word (M-b)</CODE>
+<DD>
+<A NAME="IDX32"></A>
+Move back to the start of the current or previous word. Words are
+composed of letters and digits.
+
+<DT><CODE>clear-screen (C-l)</CODE>
+<DD>
+<A NAME="IDX33"></A>
+Clear the screen and redraw the current line,
+leaving the current line at the top of the screen.
+
+<DT><CODE>redraw-current-line ()</CODE>
+<DD>
+<A NAME="IDX34"></A>
+Refresh the current line. By default, this is unbound.
+
+</DL>
+
+
+
+<H3><A NAME="SEC15" HREF="rluserman.html#TOC15">Commands For Manipulating The History</A></H3>
+
+<DL COMPACT>
+
+<DT><CODE>accept-line (Newline or Return)</CODE>
+<DD>
+<A NAME="IDX35"></A>
+Accept the line regardless of where the cursor is.
+If this line is
+non-empty, it may be added to the history list for future recall with
+<CODE>add_history()</CODE>.
+If this line is a modified history line, the history line is restored
+to its original state.
+
+<DT><CODE>previous-history (C-p)</CODE>
+<DD>
+<A NAME="IDX36"></A>
+Move `back' through the history list, fetching the previous command.
+
+<DT><CODE>next-history (C-n)</CODE>
+<DD>
+<A NAME="IDX37"></A>
+Move `forward' through the history list, fetching the next command.
+
+<DT><CODE>beginning-of-history (M-&#60;)</CODE>
+<DD>
+<A NAME="IDX38"></A>
+Move to the first line in the history.
+
+<DT><CODE>end-of-history (M-&#62;)</CODE>
+<DD>
+<A NAME="IDX39"></A>
+Move to the end of the input history, i.e., the line currently
+being entered.
+
+<DT><CODE>reverse-search-history (C-r)</CODE>
+<DD>
+<A NAME="IDX40"></A>
+Search backward starting at the current line and moving `up' through
+the history as necessary. This is an incremental search.
+
+<DT><CODE>forward-search-history (C-s)</CODE>
+<DD>
+<A NAME="IDX41"></A>
+Search forward starting at the current line and moving `down' through
+the the history as necessary. This is an incremental search.
+
+<DT><CODE>non-incremental-reverse-search-history (M-p)</CODE>
+<DD>
+<A NAME="IDX42"></A>
+Search backward starting at the current line and moving `up'
+through the history as necessary using a non-incremental search
+for a string supplied by the user.
+
+<DT><CODE>non-incremental-forward-search-history (M-n)</CODE>
+<DD>
+<A NAME="IDX43"></A>
+Search forward starting at the current line and moving `down'
+through the the history as necessary using a non-incremental search
+for a string supplied by the user.
+
+<DT><CODE>history-search-forward ()</CODE>
+<DD>
+<A NAME="IDX44"></A>
+Search forward through the history for the string of characters
+between the start of the current line and the point.
+This is a non-incremental search.
+By default, this command is unbound.
+
+<DT><CODE>history-search-backward ()</CODE>
+<DD>
+<A NAME="IDX45"></A>
+Search backward through the history for the string of characters
+between the start of the current line and the point. This
+is a non-incremental search. By default, this command is unbound.
+
+<DT><CODE>yank-nth-arg (M-C-y)</CODE>
+<DD>
+<A NAME="IDX46"></A>
+Insert the first argument to the previous command (usually
+the second word on the previous line) at point.
+With an argument <VAR>n</VAR>,
+insert the <VAR>n</VAR>th word from the previous command (the words
+in the previous command begin with word 0). A negative argument
+inserts the <VAR>n</VAR>th word from the end of the previous command.
+
+<DT><CODE>yank-last-arg (M-. or M-_)</CODE>
+<DD>
+<A NAME="IDX47"></A>
+Insert last argument to the previous command (the last word of the
+previous history entry). With an
+argument, behave exactly like <CODE>yank-nth-arg</CODE>.
+Successive calls to <CODE>yank-last-arg</CODE> move back through the history
+list, inserting the last argument of each line in turn.
+
+</DL>
+
+
+
+<H3><A NAME="SEC16" HREF="rluserman.html#TOC16">Commands For Changing Text</A></H3>
+
+<DL COMPACT>
+
+<DT><CODE>delete-char (C-d)</CODE>
+<DD>
+<A NAME="IDX48"></A>
+Delete the character at point. If point is at the
+beginning of the line, there are no characters in the line, and
+the last character typed was not bound to <CODE>delete-char</CODE>, then
+return EOF.
+
+<DT><CODE>backward-delete-char (Rubout)</CODE>
+<DD>
+<A NAME="IDX49"></A>
+Delete the character behind the cursor. A numeric argument means
+to kill the characters instead of deleting them.
+
+<DT><CODE>forward-backward-delete-char ()</CODE>
+<DD>
+<A NAME="IDX50"></A>
+Delete the character under the cursor, unless the cursor is at the
+end of the line, in which case the character behind the cursor is
+deleted. By default, this is not bound to a key.
+
+<DT><CODE>quoted-insert (C-q or C-v)</CODE>
+<DD>
+<A NAME="IDX51"></A>
+Add the next character typed to the line verbatim. This is
+how to insert key sequences like <KBD>C-q</KBD>, for example.
+
+<DT><CODE>tab-insert (M-<KBD>TAB</KBD>)</CODE>
+<DD>
+<A NAME="IDX52"></A>
+Insert a tab character.
+
+<DT><CODE>self-insert (a, b, A, 1, !, ...)</CODE>
+<DD>
+<A NAME="IDX53"></A>
+Insert yourself.
+
+<DT><CODE>transpose-chars (C-t)</CODE>
+<DD>
+<A NAME="IDX54"></A>
+Drag the character before the cursor forward over
+the character at the cursor, moving the
+cursor forward as well. If the insertion point
+is at the end of the line, then this
+transposes the last two characters of the line.
+Negative arguments have no effect.
+
+<DT><CODE>transpose-words (M-t)</CODE>
+<DD>
+<A NAME="IDX55"></A>
+Drag the word before point past the word after point,
+moving point past that word as well.
+
+<DT><CODE>upcase-word (M-u)</CODE>
+<DD>
+<A NAME="IDX56"></A>
+Uppercase the current (or following) word. With a negative argument,
+uppercase the previous word, but do not move the cursor.
+
+<DT><CODE>downcase-word (M-l)</CODE>
+<DD>
+<A NAME="IDX57"></A>
+Lowercase the current (or following) word. With a negative argument,
+lowercase the previous word, but do not move the cursor.
+
+<DT><CODE>capitalize-word (M-c)</CODE>
+<DD>
+<A NAME="IDX58"></A>
+Capitalize the current (or following) word. With a negative argument,
+capitalize the previous word, but do not move the cursor.
+
+</DL>
+
+
+
+<H3><A NAME="SEC17" HREF="rluserman.html#TOC17">Killing And Yanking</A></H3>
+
+<DL COMPACT>
+
+<DT><CODE>kill-line (C-k)</CODE>
+<DD>
+<A NAME="IDX59"></A>
+Kill the text from point to the end of the line.
+
+<DT><CODE>backward-kill-line (C-x Rubout)</CODE>
+<DD>
+<A NAME="IDX60"></A>
+Kill backward to the beginning of the line.
+
+<DT><CODE>unix-line-discard (C-u)</CODE>
+<DD>
+<A NAME="IDX61"></A>
+Kill backward from the cursor to the beginning of the current line.
+
+<DT><CODE>kill-whole-line ()</CODE>
+<DD>
+<A NAME="IDX62"></A>
+Kill all characters on the current line, no matter where point is.
+By default, this is unbound.
+
+<DT><CODE>kill-word (M-d)</CODE>
+<DD>
+<A NAME="IDX63"></A>
+Kill from point to the end of the current word, or if between
+words, to the end of the next word.
+Word boundaries are the same as <CODE>forward-word</CODE>.
+
+<DT><CODE>backward-kill-word (M-<KBD>DEL</KBD>)</CODE>
+<DD>
+<A NAME="IDX64"></A>
+Kill the word behind point.
+Word boundaries are the same as <CODE>backward-word</CODE>.
+
+<DT><CODE>unix-word-rubout (C-w)</CODE>
+<DD>
+<A NAME="IDX65"></A>
+Kill the word behind point, using white space as a word boundary.
+The killed text is saved on the kill-ring.
+
+<DT><CODE>delete-horizontal-space ()</CODE>
+<DD>
+<A NAME="IDX66"></A>
+Delete all spaces and tabs around point. By default, this is unbound.
+
+<DT><CODE>kill-region ()</CODE>
+<DD>
+<A NAME="IDX67"></A>
+Kill the text in the current region.
+By default, this command is unbound.
+
+<DT><CODE>copy-region-as-kill ()</CODE>
+<DD>
+<A NAME="IDX68"></A>
+Copy the text in the region to the kill buffer, so it can be yanked
+right away. By default, this command is unbound.
+
+<DT><CODE>copy-backward-word ()</CODE>
+<DD>
+<A NAME="IDX69"></A>
+Copy the word before point to the kill buffer.
+The word boundaries are the same as <CODE>backward-word</CODE>.
+By default, this command is unbound.
+
+<DT><CODE>copy-forward-word ()</CODE>
+<DD>
+<A NAME="IDX70"></A>
+Copy the word following point to the kill buffer.
+The word boundaries are the same as <CODE>forward-word</CODE>.
+By default, this command is unbound.
+
+<DT><CODE>yank (C-y)</CODE>
+<DD>
+<A NAME="IDX71"></A>
+Yank the top of the kill ring into the buffer at point.
+
+<DT><CODE>yank-pop (M-y)</CODE>
+<DD>
+<A NAME="IDX72"></A>
+Rotate the kill-ring, and yank the new top. You can only do this if
+the prior command is <CODE>yank</CODE> or <CODE>yank-pop</CODE>.
+</DL>
+
+
+
+<H3><A NAME="SEC18" HREF="rluserman.html#TOC18">Specifying Numeric Arguments</A></H3>
+<DL COMPACT>
+
+<DT><CODE>digit-argument (<KBD>M-0</KBD>, <KBD>M-1</KBD>, ... <KBD>M--</KBD>)</CODE>
+<DD>
+<A NAME="IDX73"></A>
+Add this digit to the argument already accumulating, or start a new
+argument. <KBD>M--</KBD> starts a negative argument.
+
+<DT><CODE>universal-argument ()</CODE>
+<DD>
+<A NAME="IDX74"></A>
+This is another way to specify an argument.
+If this command is followed by one or more digits, optionally with a
+leading minus sign, those digits define the argument.
+If the command is followed by digits, executing <CODE>universal-argument</CODE>
+again ends the numeric argument, but is otherwise ignored.
+As a special case, if this command is immediately followed by a
+character that is neither a digit or minus sign, the argument count
+for the next command is multiplied by four.
+The argument count is initially one, so executing this function the
+first time makes the argument count four, a second time makes the
+argument count sixteen, and so on.
+By default, this is not bound to a key.
+</DL>
+
+
+
+<H3><A NAME="SEC19" HREF="rluserman.html#TOC19">Letting Readline Type For You</A></H3>
+
+<DL COMPACT>
+
+<DT><CODE>complete (<KBD>TAB</KBD>)</CODE>
+<DD>
+<A NAME="IDX75"></A>
+Attempt to perform completion on the text before point.
+The actual completion performed is application-specific.
+The default is filename completion.
+
+<DT><CODE>possible-completions (M-?)</CODE>
+<DD>
+<A NAME="IDX76"></A>
+List the possible completions of the text before point.
+
+<DT><CODE>insert-completions (M-*)</CODE>
+<DD>
+<A NAME="IDX77"></A>
+Insert all completions of the text before point that would have
+been generated by <CODE>possible-completions</CODE>.
+
+<DT><CODE>menu-complete ()</CODE>
+<DD>
+<A NAME="IDX78"></A>
+Similar to <CODE>complete</CODE>, but replaces the word to be completed
+with a single match from the list of possible completions.
+Repeated execution of <CODE>menu-complete</CODE> steps through the list
+of possible completions, inserting each match in turn.
+At the end of the list of completions, the bell is rung
+(subject to the setting of <CODE>bell-style</CODE>)
+and the original text is restored.
+An argument of <VAR>n</VAR> moves <VAR>n</VAR> positions forward in the list
+of matches; a negative argument may be used to move backward
+through the list.
+This command is intended to be bound to <KBD>TAB</KBD>, but is unbound
+by default.
+
+<DT><CODE>delete-char-or-list ()</CODE>
+<DD>
+<A NAME="IDX79"></A>
+Deletes the character under the cursor if not at the beginning or
+end of the line (like <CODE>delete-char</CODE>).
+If at the end of the line, behaves identically to
+<CODE>possible-completions</CODE>.
+This command is unbound by default.
+
+</DL>
+
+
+
+<H3><A NAME="SEC20" HREF="rluserman.html#TOC20">Keyboard Macros</A></H3>
+<DL COMPACT>
+
+<DT><CODE>start-kbd-macro (C-x ()</CODE>
+<DD>
+<A NAME="IDX80"></A>
+Begin saving the characters typed into the current keyboard macro.
+
+<DT><CODE>end-kbd-macro (C-x ))</CODE>
+<DD>
+<A NAME="IDX81"></A>
+Stop saving the characters typed into the current keyboard macro
+and save the definition.
+
+<DT><CODE>call-last-kbd-macro (C-x e)</CODE>
+<DD>
+<A NAME="IDX82"></A>
+Re-execute the last keyboard macro defined, by making the characters
+in the macro appear as if typed at the keyboard.
+
+</DL>
+
+
+
+<H3><A NAME="SEC21" HREF="rluserman.html#TOC21">Some Miscellaneous Commands</A></H3>
+<DL COMPACT>
+
+<DT><CODE>re-read-init-file (C-x C-r)</CODE>
+<DD>
+<A NAME="IDX83"></A>
+Read in the contents of the <VAR>inputrc</VAR> file, and incorporate
+any bindings or variable assignments found there.
+
+<DT><CODE>abort (C-g)</CODE>
+<DD>
+<A NAME="IDX84"></A>
+Abort the current editing command and
+ring the terminal's bell (subject to the setting of
+<CODE>bell-style</CODE>).
+
+<DT><CODE>do-uppercase-version (M-a, M-b, M-<VAR>x</VAR>, ...)</CODE>
+<DD>
+<A NAME="IDX85"></A>
+If the metafied character <VAR>x</VAR> is lowercase, run the command
+that is bound to the corresponding uppercase character.
+
+<DT><CODE>prefix-meta (<KBD>ESC</KBD>)</CODE>
+<DD>
+<A NAME="IDX86"></A>
+Metafy the next character typed. This is for keyboards
+without a meta key. Typing <SAMP>`<KBD>ESC</KBD> f'</SAMP> is equivalent to typing
+<KBD>M-f</KBD>.
+
+<DT><CODE>undo (C-_ or C-x C-u)</CODE>
+<DD>
+<A NAME="IDX87"></A>
+Incremental undo, separately remembered for each line.
+
+<DT><CODE>revert-line (M-r)</CODE>
+<DD>
+<A NAME="IDX88"></A>
+Undo all changes made to this line. This is like executing the <CODE>undo</CODE>
+command enough times to get back to the beginning.
+
+<DT><CODE>tilde-expand (M-~)</CODE>
+<DD>
+<A NAME="IDX89"></A>
+Perform tilde expansion on the current word.
+
+<DT><CODE>set-mark (C-@)</CODE>
+<DD>
+<A NAME="IDX90"></A>
+Set the mark to the point. If a
+numeric argument is supplied, the mark is set to that position.
+
+<DT><CODE>exchange-point-and-mark (C-x C-x)</CODE>
+<DD>
+<A NAME="IDX91"></A>
+Swap the point with the mark. The current cursor position is set to
+the saved position, and the old cursor position is saved as the mark.
+
+<DT><CODE>character-search (C-])</CODE>
+<DD>
+<A NAME="IDX92"></A>
+A character is read and point is moved to the next occurrence of that
+character. A negative count searches for previous occurrences.
+
+<DT><CODE>character-search-backward (M-C-])</CODE>
+<DD>
+<A NAME="IDX93"></A>
+A character is read and point is moved to the previous occurrence
+of that character. A negative count searches for subsequent
+occurrences.
+
+<DT><CODE>insert-comment (M-#)</CODE>
+<DD>
+<A NAME="IDX94"></A>
+The value of the <CODE>comment-begin</CODE>
+variable is inserted at the beginning of the current line,
+and the line is accepted as if a newline had been typed.
+
+<DT><CODE>dump-functions ()</CODE>
+<DD>
+<A NAME="IDX95"></A>
+Print all of the functions and their key bindings to the
+Readline output stream. If a numeric argument is supplied,
+the output is formatted in such a way that it can be made part
+of an <VAR>inputrc</VAR> file. This command is unbound by default.
+
+<DT><CODE>dump-variables ()</CODE>
+<DD>
+<A NAME="IDX96"></A>
+Print all of the settable variables and their values to the
+Readline output stream. If a numeric argument is supplied,
+the output is formatted in such a way that it can be made part
+of an <VAR>inputrc</VAR> file. This command is unbound by default.
+
+<DT><CODE>dump-macros ()</CODE>
+<DD>
+<A NAME="IDX97"></A>
+Print all of the Readline key sequences bound to macros and the
+strings they output. If a numeric argument is supplied,
+the output is formatted in such a way that it can be made part
+of an <VAR>inputrc</VAR> file. This command is unbound by default.
+
+</DL>
+
+
+
+<H2><A NAME="SEC22" HREF="rluserman.html#TOC22">Readline vi Mode</A></H2>
+
+<P>
+While the Readline library does not have a full set of <CODE>vi</CODE>
+editing functions, it does contain enough to allow simple editing
+of the line. The Readline <CODE>vi</CODE> mode behaves as specified in
+the POSIX 1003.2 standard.
+
+</P>
+<P>
+In order to switch interactively between <CODE>emacs</CODE> and <CODE>vi</CODE>
+editing modes, use the command <KBD>M-C-j</KBD> (bound to emacs-editing-mode
+when in <CODE>vi</CODE> mode and to vi-editing-mode in <CODE>emacs</CODE> mode).
+The Readline default is <CODE>emacs</CODE> mode.
+
+</P>
+<P>
+When you enter a line in <CODE>vi</CODE> mode, you are already placed in
+`insertion' mode, as if you had typed an <SAMP>`i'</SAMP>. Pressing <KBD>ESC</KBD>
+switches you into `command' mode, where you can edit the text of the
+line with the standard <CODE>vi</CODE> movement keys, move to previous
+history lines with <SAMP>`k'</SAMP> and subsequent lines with <SAMP>`j'</SAMP>, and
+so forth.
+
+</P>
+
+<P><HR><P>
+This document was generated on 16 April 2001 using the
+<A HREF="http://wwwinfo.cern.ch/dis/texi2html/">texi2html</A>
+translator version 1.52.</P>
+</BODY>
+</HTML>
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