1 files changed, 96 insertions, 0 deletions
diff --git a/src/hostid.c b/src/hostid.c
new file mode 100644
index 0000000..090b8a0
--- /dev/null
+++ b/src/hostid.c
@@ -0,0 +1,96 @@
+/* print the hexadecimal identifier for the current host
+
+   Copyright (C) 1997, 1999, 2000, 2001, 2002, 2003, 2004 Free
+   Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/* Written by Jim Meyering.  */
+
+#include <config.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <sys/types.h>
+
+#include "system.h"
+#include "long-options.h"
+#include "error.h"
+#include "quote.h"
+
+/* The official name of this program (e.g., no `g' prefix).  */
+#define PROGRAM_NAME "hostid"
+
+#define AUTHORS "Jim Meyering"
+
+/* The name this program was run with, for error messages. */
+char *program_name;
+
+void
+usage (int status)
+{
+  if (status != EXIT_SUCCESS)
+    fprintf (stderr, _("Try `%s --help' for more information.\n"),
+	     program_name);
+  else
+    {
+      printf (_("\
+Usage: %s\n\
+  or:  %s OPTION\n\
+Print the numeric identifier (in hexadecimal) for the current host.\n\
+\n\
+"),
+	      program_name, program_name);
+      fputs (HELP_OPTION_DESCRIPTION, stdout);
+      fputs (VERSION_OPTION_DESCRIPTION, stdout);
+      printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
+    }
+  exit (status);
+}
+
+int
+main (int argc, char **argv)
+{
+  unsigned int id;
+
+  initialize_main (&argc, &argv);
+  program_name = argv[0];
+  setlocale (LC_ALL, "");
+  bindtextdomain (PACKAGE, LOCALEDIR);
+  textdomain (PACKAGE);
+
+  atexit (close_stdout);
+
+  parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
+		      usage, AUTHORS, (char const *) NULL);
+  if (getopt_long (argc, argv, "", NULL, NULL) != -1)
+    usage (EXIT_FAILURE);
+
+  if (optind < argc)
+    {
+      error (0, 0, _("extra operand %s"), quote (argv[optind]));
+      usage (EXIT_FAILURE);
+    }
+
+  id = gethostid ();
+
+  /* POSIX says gethostid returns a "32-bit identifier" but is silent
+     whether it's sign-extended.  Turn off any sign-extension.  This
+     is a no-op unless unsigned int is wider than 32 bits.  */
+  id &= 0xffffffff;
+
+  printf ("%08x\n", id);
+
+  exit (EXIT_SUCCESS);
+}