src/hostid.c

   1 /* print the hexadecimal identifier for the current host
   2    Copyright (C) 1997, 1999, 2000, 2001, 2002, 2003 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
  24 #include "system.h"
  25 #include "long-options.h"
  26 #include "error.h"
  27
  28 /* The official name of this program (e.g., no `g' prefix).  */
  29 #define PROGRAM_NAME "hostid"
  30
  31 #define AUTHORS "Jim Meyering"
  32
  33 /* The name this program was run with, for error messages. */
  34 char *program_name;
  35
  36 void
  37 usage (int status)
  38 {
  39   if (status != 0)
  40     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  41              program_name);
  42   else
  43     {
  44       printf (_("\
  45 Usage: %s\n\
  46   or:  %s OPTION\n\
  47 Print the numeric identifier (in hexadecimal) for the current host.\n\
  48 \n\
  49 "),
  50               program_name, program_name);
  51       fputs (HELP_OPTION_DESCRIPTION, stdout);
  52       fputs (VERSION_OPTION_DESCRIPTION, stdout);
  53       printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
  54     }
  55   exit (status);
  56 }
  57
  58 int
  59 main (int argc, char **argv)
  60 {
  61   long int id;
  62
  63   initialize_main (&argc, &argv);
  64   program_name = argv[0];
  65   setlocale (LC_ALL, "");
  66   bindtextdomain (PACKAGE, LOCALEDIR);
  67   textdomain (PACKAGE);
  68
  69   atexit (close_stdout);
  70
  71   parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
  72                       usage, AUTHORS, (char const *) NULL);
  73
  74   if (argc > 1)
  75     {
  76       error (0, 0, _("too many arguments"));
  77       usage (EXIT_FAILURE);
  78     }
  79
  80   id = gethostid ();
  81   printf ("%lx\n", id);
  82
  83   exit (EXIT_SUCCESS);
  84 }