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+<title>Manual Page</title>
+</head>
+<body>
+<pre>
+</pre><h2>NAME</h2><pre>
+     enhance - A program that adds command-line editing to  third
+     party programs.
+
+</pre><h2>SYNOPSIS</h2><pre>
+     enhance command [ argument ... ]
+
+
+</pre><h2>DESCRIPTION</h2><pre>
+     The enhance program provides enhanced  command-line  editing
+     facilities  to  users  of third party applications, to which
+     one doesn't have any source code. It does this by placing  a
+     pseudo-terminal  between the application and the real termi-
+     nal. It uses the tecla command-line editing library to  read
+     input  from  the real terminal, then forwards each just com-
+     pleted  input  line  to  the  application  via  the  pseudo-
+     terminal.  All output from the application is forwarded back
+     unchanged to the real terminal.
+
+     Whenever the application stops generating  output  for  more
+     than  a  tenth  of  a second, the enhance program treats the
+     latest incomplete output line as the prompt, and  redisplays
+     any incompleted input line that the user has typed after it.
+     Note that the small delay, which  is  imperceptible  to  the
+     user,  isn't necessary for correct operation of the program.
+     It is just an optimization, designed to stop the input  line
+     from being redisplayed so often that it slows down output.
+
+
+</pre><h2>DEFICIENCIES</h2><pre>
+     The one major problem that hasn't been solved yet, is how to
+     deal  with  applications  that change whether typed input is
+     echo'd by their controlling terminal. For example,  programs
+     that ask for a password, such as ftp and telnet, temporarily
+     tell their controlling terminal not to echo  what  the  user
+     types.  Since  this  request goes to the application side of
+     the psuedo terminal, the enhance program has no way of know-
+     ing  that  this  has  happened,  and continues to echo typed
+     input to its controlling  terminal,  while  the  user  types
+     their password.
+
+     Furthermore, before  executing  the  host  application,  the
+     enhance program initially sets the pseudo terminal to noecho
+     mode, so that  everything  that  it  sends  to  the  program
+     doesn't  get  redundantly echoed. If a program that switches
+     to  noecho  mode  explicitly  restores  echoing  afterwards,
+     rather  than  restoring  the terminal modes that were previ-
+     ously in force, then subsequently, every time that you enter
+     a  new input line, a duplicate copy will be displayed on the
+     next line.
+
+
+</pre><h2>FILES</h2><pre>
+     libtecla.a    -   The tecla library.
+     ~/.teclarc    -   The tecla personal customization file.
+
+
+</pre><h2>SEE ALSO</h2><pre>
+     <a href="libtecla.html">libtecla(3)</a>
+
+
+</pre><h2>AUTHOR</h2><pre>
+     Martin Shepherd  (mcs@astro.caltech.edu)
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