Added port of ppp-2.3.5 from Tomasz Domin <dot@comarch.pl> of ComArch SA.

Tomasz only tested this on the mpc823.

The official site for the original source for this PPP implementation is:

ftp://cs.anu.edu.au/pub/software/ppp

NOTE:  As of 11/30/1999, the current version of this source is 2.3.10.

1 files changed, 1004 insertions, 0 deletions

diff --git a/c/src/libnetworking/pppd/chat.c b/c/src/libnetworking/pppd/chat.c
new file mode 100644
index 0000000000..ad4c0c932e
--- /dev/null
+++ b/c/src/libnetworking/pppd/chat.c
@@ -0,0 +1,1004 @@
+/*
+ *	Chat -- a program for automatic session establishment (i.e. dial
+ *		the phone and log in).
+ *
+ * Standard termination codes:
+ *  0 - successful completion of the script
+ *  1 - invalid argument, expect string too large, etc.
+ *  2 - error on an I/O operation or fatal error condition.
+ *  3 - timeout waiting for a simple string.
+ *  4 - the first string declared as "ABORT"
+ *  5 - the second string declared as "ABORT"
+ *  6 - ... and so on for successive ABORT strings.
+ *
+ *	This software is in the public domain.
+ *
+ * -----------------
+ *	added -T and -U option and \T and \U substitution to pass a phone
+ *	number into chat script. Two are needed for some ISDN TA applications.
+ *	Keith Dart <kdart@cisco.com>
+ *	
+ *
+ *	Added SAY keyword to send output to stderr.
+ *      This allows to turn ECHO OFF and to output specific, user selected,
+ *      text to give progress messages. This best works when stderr
+ *      exists (i.e.: pppd in nodetach mode).
+ *
+ * 	Added HANGUP directives to allow for us to be called
+ *      back. When HANGUP is set to NO, chat will not hangup at HUP signal.
+ *      We rely on timeouts in that case.
+ *
+ *      Added CLR_ABORT to clear previously set ABORT string. This has been
+ *      dictated by the HANGUP above as "NO CARRIER" (for example) must be
+ *      an ABORT condition until we know the other host is going to close
+ *      the connection for call back. As soon as we have completed the
+ *      first stage of the call back sequence, "NO CARRIER" is a valid, non
+ *      fatal string. As soon as we got called back (probably get "CONNECT"),
+ *      we should re-arm the ABORT "NO CARRIER". Hence the CLR_ABORT command.
+ *      Note that CLR_ABORT packs the abort_strings[] array so that we do not
+ *      have unused entries not being reclaimed.
+ *
+ *      In the same vein as above, added CLR_REPORT keyword.
+ *
+ *      Allow for comments. Line starting with '#' are comments and are
+ *      ignored. If a '#' is to be expected as the first character, the 
+ *      expect string must be quoted.
+ *
+ *
+ *		Francis Demierre <Francis@SwissMail.Com>
+ * 		Thu May 15 17:15:40 MET DST 1997
+ *
+ *
+ *      Added -r "report file" switch & REPORT keyword.
+ *              Robert Geer <bgeer@xmission.com>
+ *
+ *      Added -s "use stderr" and -S "don't use syslog" switches.
+ *              June 18, 1997
+ *              Karl O. Pinc <kop@meme.com>
+ *
+ *
+ *	Added -e "echo" switch & ECHO keyword
+ *		Dick Streefland <dicks@tasking.nl>
+ *
+ *
+ *	Considerable updates and modifications by
+ *		Al Longyear <longyear@pobox.com>
+ *		Paul Mackerras <paulus@cs.anu.edu.au>
+ *
+ *
+ *	The original author is:
+ *
+ *		Karl Fox <karl@MorningStar.Com>
+ *		Morning Star Technologies, Inc.
+ *		1760 Zollinger Road
+ *		Columbus, OH  43221
+ *		(614)451-1883
+ *
+ *
+ */
+
+#ifndef lint
+/* static char rcsid[] = ""; */
+#endif
+
+#include <stdio.h>
+#include <ctype.h>
+#include <time.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <syslog.h>
+
+#undef	TERMIOS
+#define TERMIOS
+
+
+#include <termios.h>
+
+#define	STR_LEN	1024
+char temp2[STR_LEN];
+
+#ifndef SIGTYPE
+#define SIGTYPE void
+#endif
+
+#undef __P
+#undef __V
+
+#ifdef __STDC__
+#include <stdarg.h>
+#define __V(x)	x
+#define __P(x)	x
+#else
+#include <varargs.h>
+#define __V(x)	(va_alist) va_dcl
+#define __P(x)	()
+#define const
+#endif
+
+#ifndef O_NONBLOCK
+#define O_NONBLOCK	O_NDELAY
+#endif
+
+
+/*************** Micro getopt() *********************************************/
+#define	OPTION(c,v)	(_O&2&&**v?*(*v)++:!c||_O&4?0:(!(_O&1)&& \
+				(--c,++v),_O=4,c&&**v=='-'&&v[0][1]?*++*v=='-'\
+				&&!v[0][1]?(--c,++v,0):(_O=2,*(*v)++):0))
+#define	OPTARG(c,v)	(_O&2?**v||(++v,--c)?(_O=1,--c,*v++): \
+				(_O=4,(char*)0):(char*)0)
+#define	OPTONLYARG(c,v)	(_O&2&&**v?(_O=1,--c,*v++):(char*)0)
+#define	ARG(c,v)	(c?(--c,*v++):(char*)0)
+
+#if 0
+static int _O = 0;		/* Internal state */
+#endif
+/*************** Micro getopt() *********************************************/
+
+char *program_name;
+
+#define	MAX_ABORTS		5
+#define	MAX_REPORTS		5
+#define	DEFAULT_CHAT_TIMEOUT	45
+#define fcntl(a, b,c ) 0
+#define MAX_TIMEOUTS 10
+
+int echo          = 0;
+int verbose       = 0;
+int to_log        = 1;
+int to_stderr     = 0;
+int Verbose       = 0;
+int quiet         = 0;
+int report        = 0;
+int exit_code     = 0;
+static int speed=0;
+char *report_file = (char *) 0;
+char *chat_file   = (char *) 0;
+char *phone_num   = (char *) 0;
+char *phone_num2  = (char *) 0;
+int chat_timeout       = DEFAULT_CHAT_TIMEOUT;
+static int timeout       = DEFAULT_CHAT_TIMEOUT;
+int have_tty_parameters = 0;
+
+#ifdef TERMIOS
+#define term_parms struct termios
+#define get_term_param(param) tcgetattr(modem_fd, param)
+#define set_term_param(param) tcsetattr(modem_fd, TCSANOW, param)
+struct termios saved_tty_parameters;
+#endif
+
+char *abort_string[MAX_ABORTS]={"BUSY","NO DIALTONE","NO CARRIER","NO ASWER","RINGING\r\n\r\nRINGING"};
+char *fail_reason = (char *)0,
+	fail_buffer[50];
+int n_aborts = MAX_ABORTS, abort_next = 0, timeout_next = 0, echo_next = 0;
+int clear_abort_next = 0;
+
+char *report_string[MAX_REPORTS] ;
+char  report_buffer[50] ;
+int n_reports = 0, report_next = 0, report_gathering = 0 ; 
+int clear_report_next = 0;
+
+int say_next = 0, hup_next = 0;
+
+void *dup_mem __P((void *b, size_t c));
+void *copy_of __P((char *s));
+/*
+SIGTYPE sigalrm __P((int signo));
+SIGTYPE sigint __P((int signo));
+SIGTYPE sigterm __P((int signo));
+SIGTYPE sighup __P((int signo));
+*/
+void unalarm __P((void));
+void init __P((void));
+void set_tty_parameters __P((void));
+void echo_stderr __P((int));
+void break_sequence __P((void));
+void terminate __P((int status));
+void do_file __P((char *chat_file));
+int  get_string __P((register char *string));
+int  put_string __P((register char *s));
+int  write_char __P((int c));
+int  put_char __P((int c));
+int  get_char __P((void));
+void chat_send __P((register char *s));
+char *character __P((int c));
+void chat_expect __P((register char *s));
+char *clean __P((register char *s, int sending));
+void break_sequence __P((void));
+void terminate __P((int status));
+void pack_array __P((char **array, int end));
+char *expect_strtok __P((char *, char *));
+int vfmtmsg __P((char *, int, const char *, va_list));	/* vsprintf++ */
+
+#if 0
+int usleep( long usec );				  /* returns 0 if ok, else -1 */
+#endif
+    
+extern int input_fd,output_fd;
+
+int main __P((int, char *[]));
+
+void *dup_mem(b, c)
+void *b;
+size_t c;
+{
+    void *ans = malloc (c);
+    if (!ans)
+		return NULL;
+
+    memcpy (ans, b, c);
+    return ans;
+}
+
+void *copy_of (s)
+char *s;
+{
+    return dup_mem (s, strlen (s) + 1);
+}
+
+/*
+ * chat [ -v ] [-T number] [-U number] [ -t timeout ] [ -f chat-file ] \
+ * [ -r report-file ] \
+ *		[...[[expect[-say[-expect...]] say expect[-say[-expect]] ...]]]
+ *
+ *	Perform a UUCP-dialer-like chat script on stdin and stdout.
+ */
+char *getnextcommand(char **string)
+{
+	char *buf=*string,*res;
+	res=strchr(buf,'@');
+	if (res==NULL)
+		return NULL;
+	*res='\0';
+	*string=res+1;
+	return buf;
+}
+
+ 
+extern int modem_fd;
+int
+	chatmain(argv)
+     char *argv;
+{
+    char *arg;
+	int i;
+	char *t;
+	exit_code=0;
+	speed=0;
+/*
+ * Default the report file to the stderr location
+ */
+/*    if (report_fp == NULL)
+	report_fp = stderr;
+*/
+    init();
+	while ( (arg = getnextcommand(&argv)) != NULL) {
+	    chat_expect(arg);
+		if (exit_code>0) break;
+	    t=temp2;
+
+		while(*t)
+		{
+			if (strncmp("CARRIER",t,7)==0)
+			{/* parse speed information */
+				i=0;
+				while(!isdigit(t[i]))
+					i++;
+				t=&t[i];
+				i=0;
+				while(isdigit(t[i]))
+					i++;
+				t[i]=0;
+				sscanf(t,"%d",&speed);
+				break;				
+			}
+			t++;
+		}
+	    if ((arg = getnextcommand(&argv)) != NULL)
+		chat_send(arg);
+		if (exit_code>0) break;
+	}
+
+    if (exit_code) return exit_code;
+    return -speed;
+}
+
+
+
+/*
+ *	Print an error message and terminate.
+ */
+
+void init()
+{
+    set_tty_parameters();
+	speed=0;
+}
+
+void set_tty_parameters()
+{
+    term_parms t;
+
+	if (get_term_param (&t) < 0)
+		syslog(LOG_NOTICE,"Can't get terminal parameters:")
+		;
+	
+    saved_tty_parameters = t;
+    have_tty_parameters  = 1;
+    t.c_iflag     |= IGNBRK | ISTRIP | IGNPAR;
+    t.c_oflag      = 0;
+    t.c_lflag      = 0;
+    t.c_cc[VERASE] =
+    t.c_cc[VKILL]  = 0;
+    t.c_cc[VMIN]   = 0;
+    t.c_cc[VTIME]  = 1;
+    if (set_term_param (&t) < 0)
+		syslog(LOG_NOTICE,"Can't set terminal parameters:")
+		;
+}
+
+void break_sequence()
+{
+
+/*    tcsendbreak (0, 0);*/
+}
+
+/*void terminate(status)
+int status;
+{
+    echo_stderr(-1);
+
+    if (have_tty_parameters) {
+	if (set_term_param (&saved_tty_parameters) < 0)
+	    fatal(2, "Can't restore terminal parameters: %m");
+    }
+}
+*/
+/*
+ *	'Clean up' this string.
+ */
+char *clean(s, sending)
+register char *s;
+int sending;  /* set to 1 when sending (putting) this string. */
+{
+    char temp[STR_LEN], cur_chr;
+    register char *s1, *phchar;
+    int add_return = sending;
+#define isoctal(chr) (((chr) >= '0') && ((chr) <= '7'))
+
+    s1 = temp;
+    while (*s) {
+	cur_chr = *s++;
+	if (cur_chr == '^') {
+	    cur_chr = *s++;
+	    if (cur_chr == '\0') {
+		*s1++ = '^';
+		break;
+	    }
+	    cur_chr &= 0x1F;
+	    if (cur_chr != 0) {
+		*s1++ = cur_chr;
+	    }
+	    continue;
+	}
+
+	if (cur_chr != '\\') {
+	    *s1++ = cur_chr;
+	    continue;
+	}
+
+	cur_chr = *s++;
+	if (cur_chr == '\0') {
+	    if (sending) {
+		*s1++ = '\\';
+		*s1++ = '\\';
+	    }
+	    break;
+	}
+
+	switch (cur_chr) {
+	case 'b':
+	    *s1++ = '\b';
+	    break;
+
+	case 'c':
+	    if (sending && *s == '\0')
+		add_return = 0;
+	    else
+		*s1++ = cur_chr;
+	    break;
+
+	case '\\':
+	case 'K':
+	case 'p':
+	case 'd':
+	    if (sending)
+		*s1++ = '\\';
+
+	    *s1++ = cur_chr;
+	    break;
+
+	case 'T':
+	    if (sending && phone_num) {
+		for ( phchar = phone_num; *phchar != '\0'; phchar++) 
+		    *s1++ = *phchar;
+	    }
+	    else {
+		*s1++ = '\\';
+		*s1++ = 'T';
+	    }
+	    break;
+
+	case 'U':
+	    if (sending && phone_num2) {
+		for ( phchar = phone_num2; *phchar != '\0'; phchar++) 
+		    *s1++ = *phchar;
+	    }
+	    else {
+		*s1++ = '\\';
+		*s1++ = 'U';
+	    }
+	    break;
+
+	case 'q':
+	    quiet = 1;
+	    break;
+
+	case 'r':
+	    *s1++ = '\r';
+	    break;
+
+	case 'n':
+	    *s1++ = '\n';
+	    break;
+
+	case 's':
+	    *s1++ = ' ';
+	    break;
+
+	case 't':
+	    *s1++ = '\t';
+	    break;
+
+	case 'N':
+	    if (sending) {
+		*s1++ = '\\';
+		*s1++ = '\0';
+	    }
+	    else
+		*s1++ = 'N';
+	    break;
+	    
+	default:
+	    if (isoctal (cur_chr)) {
+		cur_chr &= 0x07;
+		if (isoctal (*s)) {
+		    cur_chr <<= 3;
+		    cur_chr |= *s++ - '0';
+		    if (isoctal (*s)) {
+			cur_chr <<= 3;
+			cur_chr |= *s++ - '0';
+		    }
+		}
+
+		if (cur_chr != 0 || sending) {
+		    if (sending && (cur_chr == '\\' || cur_chr == 0))
+			*s1++ = '\\';
+		    *s1++ = cur_chr;
+		}
+		break;
+	    }
+
+	    if (sending)
+		*s1++ = '\\';
+	    *s1++ = cur_chr;
+	    break;
+	}
+    }
+
+    if (add_return)
+	*s1++ = '\r';
+
+    *s1++ = '\0'; /* guarantee closure */
+    *s1++ = '\0'; /* terminate the string */
+    return dup_mem (temp, (size_t) (s1 - temp)); /* may have embedded nuls */
+}
+
+/*
+ * A modified version of 'strtok'. This version skips \ sequences.
+ */
+
+char *expect_strtok (s, term)
+     char *s, *term;
+{
+    static  char *str   = "";
+    int	    escape_flag = 0;
+    char   *result;
+
+/*
+ * If a string was specified then do initial processing.
+ */
+    if (s)
+	str = s;
+
+/*
+ * If this is the escape flag then reset it and ignore the character.
+ */
+    if (*str)
+	result = str;
+    else
+	result = (char *) 0;
+
+    while (*str) {
+	if (escape_flag) {
+	    escape_flag = 0;
+	    ++str;
+	    continue;
+	}
+
+	if (*str == '\\') {
+	    ++str;
+	    escape_flag = 1;
+	    continue;
+	}
+
+/*
+ * If this is not in the termination string, continue.
+ */
+	if (strchr (term, *str) == (char *) 0) {
+	    ++str;
+	    continue;
+	}
+
+/*
+ * This is the terminator. Mark the end of the string and stop.
+ */
+	*str++ = '\0';
+	break;
+    }
+    return (result);
+}
+
+/*
+ * Process the expect string
+ */
+
+void   chat_expect (s)
+char *s;
+{
+    char *expect;
+    char *reply;
+
+    if (strcmp(s, "HANGUP") == 0) {
+	++hup_next;
+        return ;
+    }
+ 
+    if (strcmp(s, "ABORT") == 0) {
+	++abort_next;
+	return ;
+    }
+
+    if (strcmp(s, "CLR_ABORT") == 0) {
+	++clear_abort_next;
+	return ;
+    }
+
+    if (strcmp(s, "REPORT") == 0) {
+	++report_next;
+	return ;
+    }
+
+    if (strcmp(s, "CLR_REPORT") == 0) {
+	++clear_report_next;
+	return ;
+    }
+
+    if (strcmp(s, "TIMEOUT") == 0) {
+	++timeout_next;
+	return ;
+    }
+
+    if (strcmp(s, "ECHO") == 0) {
+	++echo_next;
+	return ;
+    }
+
+    if (strcmp(s, "SAY") == 0) {
+	++say_next;
+	return ;
+    }
+
+/*
+ * Fetch the expect and reply string.
+ */
+    for (;;) {
+	expect = expect_strtok (s, "-");
+	s      = (char *)0 ;
+
+	if (expect == (char *) 0)
+	    return ;
+
+	reply = expect_strtok (s, "-");
+
+/*
+ * Handle the expect string. If successful then exit.
+ */
+	if (get_string (expect))
+	    return;
+
+/*
+ * If there is a sub-reply string then send it. Otherwise any condition
+ * is terminal.
+ */
+	if (reply == (char *) 0 || exit_code != 3)
+	    break;
+
+	chat_send (reply);
+    }
+
+/*
+ * The expectation did not occur. This is terminal.
+ */
+    return ;
+}
+
+/*
+ *  process the reply string
+ */
+void chat_send (s)
+register char *s;
+{
+    if (say_next) {
+	say_next = 0;
+	s = clean(s,0);
+	write(modem_fd, s, strlen(s));
+        free(s);
+	return;
+    }
+
+    if (hup_next) {
+        hup_next = 0;
+    }
+
+    if (echo_next) {
+	echo_next = 0;
+	echo = (strcmp(s, "ON") == 0);
+	return;
+    }
+
+    if (abort_next) {
+	/* char *s1; */
+	
+	
+	   ;
+	
+
+	return;
+    }
+
+
+/*    if (report_next) {
+	char *s1;
+	
+	report_next = 0;
+	if (n_reports >= MAX_REPORTS)
+	    {
+	      exit_code=2;
+	      return;
+	    }
+	
+	s1 = clean(s, 0);
+	
+	if (strlen(s1) > strlen(s) || strlen(s1) > sizeof fail_buffer - 1)
+	    {
+	      exit_code=1;
+	      return;
+	    }
+	
+	report_string[n_reports++] = s1;
+	
+	return;
+    }
+*/
+/*    if (clear_report_next) {
+	char *s1;
+	int   i;
+	int   old_max;
+	int   pack = 0;
+	
+	clear_report_next = 0;
+	
+	s1 = clean(s, 0);
+	
+	if (strlen(s1) > strlen(s) || strlen(s1) > sizeof fail_buffer - 1)
+	    {
+	      exit_code=1;
+	      return;
+	    }
+
+	old_max = n_reports;
+	for (i=0; i < n_reports; i++) {
+	    if ( strcmp(s1,report_string[i]) == 0 ) {
+		free(report_string[i]);
+		report_string[i] = NULL;
+		pack++;
+		n_reports--;
+	    }
+	}
+        free(s1);
+        if (pack)
+	    pack_array(report_string,old_max);
+	
+	return;
+    }
+*/
+
+    if (timeout_next) {
+	timeout=atoi(s);
+	timeout_next = 0;
+	chat_timeout = atoi(s);
+	
+	if (chat_timeout <= 0)
+	    chat_timeout = DEFAULT_CHAT_TIMEOUT;
+
+
+	return;
+    }
+    if (strcmp(s, "EOT") == 0)
+	s = "^D\\c";
+    else if (strcmp(s, "BREAK") == 0)
+	s = "\\K\\c";
+
+    if (!put_string(s))
+	    {
+	      exit_code=1;
+	      return;
+	    }
+}
+
+int get_char()
+{
+    int status;
+    char c;
+    int tries=MAX_TIMEOUTS;
+
+	while(tries)
+	{
+	    status = read(modem_fd, &c, 1);
+	    switch (status) {
+		   case 1:
+				return ((int)c & 0x7F);
+		    default:
+				tries--;			
+	    }
+    }
+	return -1;						
+}
+
+int put_char(c)
+int c;
+{
+    int status;
+    char ch = c;
+
+	/* inter-character typing delay (?) */
+
+    status = write(modem_fd, &ch, 1);
+
+    switch (status) {
+    case 1:
+	return (0);
+	
+    default:
+	
+	
+    }
+  return 0;
+}
+
+int write_char (c)
+int c;
+{
+    if (put_char(c) < 0) {
+	return (0);
+    }
+    return (1);
+}
+
+int put_string (s)
+register char *s;
+{
+
+
+    quiet = 0;
+    s = clean(s, 1);
+    while (*s) {
+	register char c = *s++;
+
+	if (c != '\\') {
+	    if (!write_char (c))
+		return 0;
+	    continue;
+	}
+
+	c = *s++;
+	switch (c) {
+	case 'd':
+	    sleep(1);
+	    break;
+
+	case 'K':
+	    break_sequence();
+	    break;
+
+	case 'p':
+	    usleep(10000); 	/* 1/100th of a second (arg is microseconds) */
+	    break;
+
+	default:
+	    if (!write_char (c))
+		return 0;
+	    break;
+	}
+    }
+
+   /* alarm(0);*/
+    return (1);
+}
+
+/*
+ *	Echo a character to stderr.
+ *	When called with -1, a '\n' character is generated when
+ *	the cursor is not at the beginning of a line.
+ */
+void echo_stderr(n)
+int n;
+{
+/*    static int need_lf;
+    char *s;
+
+    switch (n) {
+    case '\r':		 
+	break;
+    case -1:
+	if (need_lf == 0)
+	    break;
+ 
+    case '\n':
+	write(2, "\n", 1);
+	need_lf = 0;
+	break;
+    default:
+	s = character(n);
+	write(2, s, strlen(s));
+	need_lf = 1;
+	break;
+    }*/
+}
+
+/*
+ *	'Wait for' this string to appear on this file descriptor.
+ */
+
+int get_string(string)
+register char *string;
+{
+    int c, len, minlen;
+    register char *s = temp2, *end = s + STR_LEN;
+    char *logged = temp2;
+    struct termios tios;
+
+    tcgetattr(modem_fd, &tios);
+    tios.c_cc[VMIN] = 0;
+    tios.c_cc[VTIME] = timeout*10/MAX_TIMEOUTS;
+    tcsetattr(modem_fd, TCSANOW, &tios);
+		
+    string = clean(string, 0);
+    len = strlen(string);
+    minlen = (len > sizeof(fail_buffer)? len: sizeof(fail_buffer)) - 1;
+	
+    if (len > STR_LEN) {
+	exit_code = 1;
+	return 0;
+    }
+
+    if (len == 0) {
+			return (1);
+    }
+
+
+   while ( (c = get_char()) >= 0) {
+		int n, abort_len;
+
+	*s++ = c;
+	*s=0;
+	
+	if (s - temp2 >= len &&
+	    c == string[len - 1] &&
+	    strncmp(s - len, string, len) == 0) {
+	    return (1);
+	}
+
+	for (n = 0; n < n_aborts; ++n) {
+	    if (s - temp2 >= (abort_len = strlen(abort_string[n])) &&
+		strncmp(s - abort_len, abort_string[n], abort_len) == 0) {
+
+		exit_code = n + 4;
+		strcpy(fail_reason = fail_buffer, abort_string[n]);
+		return (0);
+	    }
+	}
+
+	if (s >= end) {
+	    if (logged < s - minlen) {
+		logged = s;
+	    }
+	    s -= minlen;
+	    memmove(temp2, s, minlen);
+	    logged = temp2 + (logged - s);
+	    s = temp2 + minlen;
+	}
+    }
+    exit_code = 3;
+    return (0);
+}
+
+/*
+ * Gross kludge to handle Solaris versions >= 2.6 having usleep.
+ */
+
+/*
+  usleep -- support routine for 4.2BSD system call emulations
+  last edit:  29-Oct-1984     D A Gwyn
+  */
+
+
+#if 0
+int
+usleep( usec )				  /* returns 0 if ok, else -1 */
+    long		usec;		/* delay in microseconds */
+{
+  rtems_status_code status;
+  rtems_interval    ticks_per_second;
+  rtems_interval    ticks;
+  status = rtems_clock_get(
+    RTEMS_CLOCK_GET_TICKS_PER_SECOND,
+    &ticks_per_second);
+    ticks = (usec * (ticks_per_second/1000))/1000;
+    status = rtems_task_wake_after( ticks );
+  return 0;
+}
+#endif
+
+void pack_array (array, end)
+    char **array; /* The address of the array of string pointers */
+    int    end;   /* The index of the next free entry before CLR_ */
+{
+    int i, j;
+
+    for (i = 0; i < end; i++) {
+	if (array[i] == NULL) {
+	    for (j = i+1; j < end; ++j)
+		if (array[j] != NULL)
+		    array[i++] = array[j];
+	    for (; i < end; ++i)
+		array[i] = NULL;
+	    break;
+	}
+    }
+}
+
+/*
+ * vfmtmsg - format a message into a buffer.  Like vsprintf except we
+ * also specify the length of the output buffer, and we handle the
+ * %m (error message) format.
+ * Doesn't do floating-point formats.
+ * Returns the number of chars put into buf.
+ */
+#define OUTCHAR(c)	(buflen > 0? (--buflen, *buf++ = (c)): 0)