src/hostid.c

   1 /* print the hexadecimal identifier for the current host
   2
   3    Copyright (C) 1997, 1999, 2000, 2001, 2002, 2003, 2004 Free
   4    Software Foundation, Inc.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software Foundation,
  18    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 /* Written by Jim Meyering.  */
  21
  22 #include <config.h>
  23 #include <stdio.h>
  24 #include <sys/types.h>
  25
  26 #include "system.h"
  27 #include "long-options.h"
  28 #include "error.h"
  29
  30 /* The official name of this program (e.g., no `g' prefix).  */
  31 #define PROGRAM_NAME "hostid"
  32
  33 #define AUTHORS "Jim Meyering"
  34
  35 /* The name this program was run with, for error messages. */
  36 char *program_name;
  37
  38 void
  39 usage (int status)
  40 {
  41   if (status != EXIT_SUCCESS)
  42     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  43              program_name);
  44   else
  45     {
  46       printf (_("\
  47 Usage: %s\n\
  48   or:  %s OPTION\n\
  49 Print the numeric identifier (in hexadecimal) for the current host.\n\
  50 \n\
  51 "),
  52               program_name, program_name);
  53       fputs (HELP_OPTION_DESCRIPTION, stdout);
  54       fputs (VERSION_OPTION_DESCRIPTION, stdout);
  55       printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
  56     }
  57   exit (status);
  58 }
  59
  60 int
  61 main (int argc, char **argv)
  62 {
  63   long int id;
  64
  65   initialize_main (&argc, &argv);
  66   program_name = argv[0];
  67   setlocale (LC_ALL, "");
  68   bindtextdomain (PACKAGE, LOCALEDIR);
  69   textdomain (PACKAGE);
  70
  71   atexit (close_stdout);
  72
  73   parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
  74                       usage, AUTHORS, (char const *) NULL);
  75
  76   if (argc > 1)
  77     {
  78       error (0, 0, _("too many arguments"));
  79       usage (EXIT_FAILURE);
  80     }
  81
  82   id = gethostid ();
  83   printf ("%lx\n", id);
  84
  85   exit (EXIT_SUCCESS);
  86 }