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- /* hostname - set or print the name of current host system
- Copyright (C) 1994 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* Jim Meyering <meyering@comco.com> */
-
- #include <config.h>
- #include <stdio.h>
- #include <sys/types.h>
-
- #include "system.h"
- #include "version.h"
- #include "long-options.h"
-
- #if !defined(HAVE_SETHOSTNAME) && defined(HAVE_SYSINFO) && \
- defined (HAVE_SYS_SYSTEMINFO_H) && defined(HAVE_LIMITS_H)
- #include <limits.h>
- #include <sys/systeminfo.h>
-
- int
- sethostname (name, namelen)
- char *name;
- int namelen;
- {
- /* Using sysinfo() is the SVR4 mechanism to set a hostname. */
- int result;
-
- result = sysinfo (SI_SET_HOSTNAME, name, namelen);
-
- return (result == -1 ? result : 0);
- }
-
- #define HAVE_SETHOSTNAME 1 /* Now we have it... */
- #endif
-
- void error ();
- char *xgethostname ();
-
- /* The name this program was run with. */
- char *program_name;
-
- static void
- usage (status)
- int status;
- {
- if (status != 0)
- fprintf (stderr, "Try `%s --help' for more information.\n",
- program_name);
- else
- {
- printf ("\
- Usage: %s [NAME]\n\
- or: %s OPTION\n\
- \n\
- --help display this help and exit\n\
- --version output version information and exit\n\
- "
- , program_name, program_name);
- }
- exit (status);
- }
-
- void
- main (argc, argv)
- int argc;
- char **argv;
- {
- char *hostname;
-
- program_name = argv[0];
-
- parse_long_options (argc, argv, "hostname", version_string, usage);
-
- #ifdef HAVE_SETHOSTNAME
- if (argc == 2)
- {
- int err;
-
- /* Set hostname to argv[1]. */
- err = sethostname (argv[1], strlen (argv[1]));
- if (err != 0)
- error (1, errno, "%s", argv[1]);
- exit (0);
- }
- #else
- if (argc == 2)
- error (1, 0, "cannot set hostname; this system lacks the functionality");
- #endif
-
- if (argc == 1)
- {
- hostname = xgethostname ();
- if (hostname == NULL)
- error (1, errno, "cannot determine hostname");
- printf ("%s\n", hostname);
- }
- else
- {
- error (2, 0, "too many arguments");
- usage (1);
- }
-
- exit (0);
- }
-