src/hostid.c

   1 /* print the hexadecimal identifier for the current host
   2    Copyright (C) 1997, 1999, 2000, 2001 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 "closeout.h"
  29 #include "long-options.h"
  30 #include "error.h"
  31
  32 /* The official name of this program (e.g., no `g' prefix).  */
  33 #define PROGRAM_NAME "hostid"
  34
  35 #define AUTHORS "Jim Meyering"
  36
  37 /* The name this program was run with, for error messages. */
  38 char *program_name;
  39
  40 void
  41 usage (int status)
  42 {
  43   if (status != 0)
  44     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  45              program_name);
  46   else
  47     {
  48       printf (_("\
  49 Usage: %s\n\
  50   or:  %s OPTION\n\
  51 Print the numeric identifier (in hexadecimal) for the current host.\n\
  52 \n\
  53 "),
  54               program_name, program_name);
  55       fputs (HELP_OPTION_DESCRIPTION, stdout);
  56       fputs (VERSION_OPTION_DESCRIPTION, stdout);
  57       puts (_("\nReport bugs to <bug-sh-utils@gnu.org>."));
  58     }
  59   exit (status);
  60 }
  61
  62 int
  63 main (int argc, char **argv)
  64 {
  65   long int id;
  66
  67   program_name = argv[0];
  68   setlocale (LC_ALL, "");
  69   bindtextdomain (PACKAGE, LOCALEDIR);
  70   textdomain (PACKAGE);
  71
  72   atexit (close_stdout);
  73
  74   parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
  75                       AUTHORS, usage);
  76
  77   if (argc > 1)
  78     {
  79       error (0, 0, _("too many arguments"));
  80       usage (1);
  81     }
  82
  83   id = gethostid ();
  84   printf ("%lx\n", id);
  85
  86   exit (EXIT_SUCCESS);
  87 }