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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-7.1/] [readline/] [examples/] [rl.c] - Blame information for rev 866

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Line No. Rev Author Line
1 227 jeremybenn
/*
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 * rl - command-line interface to read a line from the standard input
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 *      (or another fd) using readline.
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 *
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 * usage: rl [-p prompt] [-u unit] [-d default] [-n nchars]
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 */
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/* Copyright (C) 1987-2002 Free Software Foundation, Inc.
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   This file is part of the GNU Readline Library, a library for
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   reading lines of text with interactive input and history editing.
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   The GNU Readline Library is free software; you can redistribute it
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   and/or modify it under the terms of the GNU General Public License
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   as published by the Free Software Foundation; either version 2, or
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   (at your option) any later version.
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   The GNU Readline Library is distributed in the hope that it will be
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   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   The GNU General Public License is often shipped with GNU software, and
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   is generally kept in a file called COPYING or LICENSE.  If you do not
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   have a copy of the license, write to the Free Software Foundation,
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   59 Temple Place, Suite 330, Boston, MA 02111 USA. */
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#if defined (HAVE_CONFIG_H)
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#  include <config.h>
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#endif
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#include <stdio.h>
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#include <sys/types.h>
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#ifdef HAVE_STDLIB_H
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#  include <stdlib.h>
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#else 
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extern void exit();
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#endif
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#if defined (READLINE_LIBRARY)
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#  include "posixstat.h"
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#  include "readline.h"
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#  include "history.h"
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#else
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#  include <sys/stat.h>
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#  include <readline/readline.h>
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#  include <readline/history.h>
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#endif
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extern int optind;
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extern char *optarg;
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#if !defined (strchr) && !defined (__STDC__)
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extern char *strrchr();
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#endif
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static char *progname;
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static char *deftext;
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static int
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set_deftext ()
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{
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  if (deftext)
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    {
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      rl_insert_text (deftext);
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      deftext = (char *)NULL;
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      rl_startup_hook = (rl_hook_func_t *)NULL;
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    }
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  return 0;
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}
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static void
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usage()
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{
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  fprintf (stderr, "%s: usage: %s [-p prompt] [-u unit] [-d default] [-n nchars]\n",
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                progname, progname);
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}
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int
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main (argc, argv)
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     int argc;
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     char **argv;
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{
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  char *temp, *prompt;
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  struct stat sb;
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  int opt, fd, nch;
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  FILE *ifp;
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  progname = strrchr(argv[0], '/');
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  if (progname == 0)
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    progname = argv[0];
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  else
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    progname++;
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  /* defaults */
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  prompt = "readline$ ";
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  fd = nch = 0;
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  deftext = (char *)0;
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  while ((opt = getopt(argc, argv, "p:u:d:n:")) != EOF)
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    {
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      switch (opt)
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        {
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        case 'p':
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          prompt = optarg;
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          break;
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        case 'u':
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          fd = atoi(optarg);
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          if (fd < 0)
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            {
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              fprintf (stderr, "%s: bad file descriptor `%s'\n", progname, optarg);
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              exit (2);
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            }
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          break;
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        case 'd':
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          deftext = optarg;
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          break;
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        case 'n':
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          nch = atoi(optarg);
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          if (nch < 0)
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            {
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              fprintf (stderr, "%s: bad value for -n: `%s'\n", progname, optarg);
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              exit (2);
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            }
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          break;
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        default:
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          usage ();
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          exit (2);
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        }
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    }
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  if (fd != 0)
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    {
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      if (fstat (fd, &sb) < 0)
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        {
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          fprintf (stderr, "%s: %d: bad file descriptor\n", progname, fd);
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          exit (1);
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        }
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      ifp = fdopen (fd, "r");
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      rl_instream = ifp;
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    }
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  if (deftext && *deftext)
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    rl_startup_hook = set_deftext;
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  if (nch > 0)
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    rl_num_chars_to_read = nch;
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  temp = readline (prompt);
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  /* Test for EOF. */
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  if (temp == 0)
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    exit (1);
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  printf ("%s\n", temp);
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  exit (0);
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}

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