src/yes.c

   1 /* yes - output a string repeatedly until killed
   2    Copyright (C) 91, 92, 93, 94, 1995 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  17
  18 /* David MacKenzie <djm@gnu.ai.mit.edu> */
  19
  20 #include <config.h>
  21 #include <stdio.h>
  22 #include <getopt.h>
  23
  24 #include "system.h"
  25 #include "long-options.h"
  26 #include "version.h"
  27
  28 /* The name this program was run with. */
  29 char *program_name;
  30
  31 static void
  32 usage (status)
  33      int status;
  34 {
  35   if (status != 0)
  36     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  37              program_name);
  38   else
  39     {
  40       printf (_("Usage: %s [OPTION]... [STRING]...\n"), program_name);
  41       printf (_("\
  42 Repeatedly output a line with all specified STRING(s), or `y'.\n\
  43 \n\
  44   --help      display this help and exit\n\
  45   --version   output version information and exit\n"));
  46     }
  47   exit (status);
  48 }
  49
  50 void
  51 main (argc, argv)
  52      int argc;
  53      char **argv;
  54 {
  55   program_name = argv[0];
  56
  57   parse_long_options (argc, argv, "yes", version_string, usage);
  58
  59   if (argc == 1)
  60     while (1)
  61       puts ("y");
  62
  63   while (1)
  64     {
  65       int i;
  66
  67       for (i = 1; i < argc; i++)
  68         {
  69           fputs (argv[i], stdout);
  70           putchar (i == argc - 1 ? '\n' : ' ');
  71         }
  72     }
  73 }