src/hostid.c

   1 /* print the hexadecimal identifier for the current host
   2    Copyright (C) 1997 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 Foundation,
  16    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 /* Written by Jim Meyering.  */
  19
  20 #include <config.h>
  21 #include <stdio.h>
  22 #include <sys/types.h>
  23 #if HAVE_UNISTD_H
  24 # include <unistd.h>
  25 #endif
  26
  27 #include "system.h"
  28 #include "long-options.h"
  29 #include "error.h"
  30
  31 /* The name this program was run with, for error messages. */
  32 char *program_name;
  33
  34 static void
  35 usage (int status)
  36 {
  37   if (status != 0)
  38     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  39              program_name);
  40   else
  41     {
  42       printf (_("Usage: %s [-v]\n"), program_name);
  43       printf (_("\
  44 Print the numeric identifier (in hexadecimal) for the current host.\n\
  45 \n\
  46       --help       display this help and exit\n\
  47       --version    output version information and exit\n\
  48 \n\
  49 "));
  50       puts (_("\nReport bugs to <bug-sh-utils@gnu.org>."));
  51     }
  52   exit (status);
  53 }
  54
  55 int
  56 main (int argc, char **argv)
  57 {
  58   long int id;
  59
  60   program_name = argv[0];
  61   setlocale (LC_ALL, "");
  62   bindtextdomain (PACKAGE, LOCALEDIR);
  63   textdomain (PACKAGE);
  64
  65   parse_long_options (argc, argv, "hostid", GNU_PACKAGE, VERSION, usage);
  66
  67   if (argc > 1)
  68     {
  69       error (0, 0, _("too many arguments"));
  70       usage (1);
  71     }
  72
  73   id = gethostid ();
  74   printf ("%lx\n", id);
  75
  76   if (fclose (stdout) == EOF)
  77     error (EXIT_FAILURE, errno, _("write error"));
  78
  79   exit (EXIT_SUCCESS);
  80 }