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File Name : rl.c

/*
 * rl - command-line interface to read a line from the standard input
 *      (or another fd) using readline.
 *
 * usage: rl [-p prompt] [-u unit] [-d default] [-n nchars]
 */

This file is part of the GNU Readline Library (Readline), a library for
   reading lines of text with interactive input and history editing.

Readline is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

Readline is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

You should have received a copy of the GNU General Public License
   along with Readline.  If not, see <http://www.gnu.org/licenses/>.
*/

#if defined (HAVE_CONFIG_H)
#  include <config.h>
#endif

#include <stdio.h>
#include <sys/types.h>

#ifdef HAVE_STDLIB_H
#  include <stdlib.h>
#else 
extern void exit();
#endif

#if defined (READLINE_LIBRARY)
#  include "posixstat.h"
#  include "readline.h"
#  include "history.h"
#else
#  include <sys/stat.h>
#  include <readline/readline.h>
#  include <readline/history.h>
#endif

extern int optind;
extern char *optarg;

#if !defined (strchr) && !defined (__STDC__)
extern char *strrchr();
#endif

static char *progname;
static char *deftext;

static int
set_deftext ()
{
  if (deftext)
    {
      rl_insert_text (deftext);
      deftext = (char *)NULL;
      rl_startup_hook = (rl_hook_func_t *)NULL;
    }
  return 0;
}

static void
usage()
{
  fprintf (stderr, "%s: usage: %s [-p prompt] [-u unit] [-d default] [-n nchars]\n",
		progname, progname);
}

int
main (argc, argv)
     int argc;
     char **argv;
{
  char *temp, *prompt;
  struct stat sb;
  int opt, fd, nch;
  FILE *ifp;

progname = strrchr(argv[0], '/');
  if (progname == 0)
    progname = argv[0];
  else
    progname++;

/* defaults */
  prompt = "readline$ ";
  fd = nch = 0;
  deftext = (char *)0;

while ((opt = getopt(argc, argv, "p:u:d:n:")) != EOF)
    {
      switch (opt)
	{
	case 'p':
	  prompt = optarg;
	  break;
	case 'u':
	  fd = atoi(optarg);
	  if (fd < 0)
	    {
	      fprintf (stderr, "%s: bad file descriptor `%s'\n", progname, optarg);
	      exit (2);
	    }
	  break;
	case 'd':
	  deftext = optarg;
	  break;
	case 'n':
	  nch = atoi(optarg);
	  if (nch < 0)
	    {
	      fprintf (stderr, "%s: bad value for -n: `%s'\n", progname, optarg);
	      exit (2);
	    }
	  break;
	default:
	  usage ();
	  exit (2);
	}
    }

if (fd != 0)
    {
      if (fstat (fd, &sb) < 0)
	{
	  fprintf (stderr, "%s: %d: bad file descriptor\n", progname, fd);
	  exit (1);
	}
      ifp = fdopen (fd, "r");
      rl_instream = ifp;
    }

if (deftext && *deftext)
    rl_startup_hook = set_deftext;

if (nch > 0)
    rl_num_chars_to_read = nch;

temp = readline (prompt);

/* Test for EOF. */
  if (temp == 0)
    exit (1);

printf ("%s\n", temp);
  exit (0);
}

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	drwxr-xr-x	2019-09-17 04:27:28
..	dir	-	root/root	drwxr-xr-x	2026-01-07 03:21:50
rlfe	dir	-	root/root	drwxr-xr-x	2019-09-17 04:27:28
excallback.c	file	5.6 KB	root/root	-rw-r--r--	2006-03-21 03:07:51
fileman.c	file	11.16 KB	root/root	-rw-r--r--	2009-01-04 07:32:33
histexamp.c	file	2.82 KB	root/root	-rw-r--r--	2009-01-04 07:32:33
manexamp.c	file	3.22 KB	root/root	-rw-r--r--	2009-01-04 07:32:33
readlinebuf.h	file	3.36 KB	root/root	-rw-r--r--	2008-08-20 01:16:56
rl-fgets.c	file	10.89 KB	root/root	-rw-r--r--	2004-04-22 08:52:17
rl.c	file	3.1 KB	root/root	-rw-r--r--	2009-01-04 07:32:33
rlcat.c	file	3.22 KB	root/root	-rw-r--r--	2009-01-04 07:32:33
rlevent.c	file	3.22 KB	root/root	-rw-r--r--	2009-01-06 05:04:26
rlptytest.c	file	6.38 KB	root/root	-rw-r--r--	2005-09-29 01:45:33
rltest.c	file	2.1 KB	root/root	-rw-r--r--	2009-01-04 07:32:33
rlversion.c	file	1.26 KB	root/root	-rw-r--r--	2009-01-06 05:04:33