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a0faff1a58
* src/system.h (emit_bug_reporting_address): New function. * src/base64.c: Use it rather than a literal printf. * src/basename.c, src/cat.c, src/chgrp.c, src/chmod.c: * src/chown.c, src/chroot.c, src/cksum.c, src/comm.c, src/cp.c: * src/csplit.c, src/cut.c, src/date.c, src/dd.c, src/df.c: * src/dircolors.c, src/dirname.c, src/du.c, src/echo.c, src/env.c: * src/expand.c, src/expr.c, src/factor.c, src/fmt.c, src/fold.c: * src/head.c, src/hostid.c, src/hostname.c, src/id.c, src/install.c: * src/join.c, src/kill.c, src/link.c, src/ln.c, src/logname.c: * src/ls.c, src/md5sum.c, src/mkdir.c, src/mkfifo.c, src/mknod.c: * src/mv.c, src/nice.c, src/nl.c, src/nohup.c, src/od.c: * src/paste.c, src/pathchk.c, src/pinky.c, src/pr.c, src/printenv.c: * src/printf.c, src/ptx.c, src/pwd.c, src/readlink.c, src/rm.c: * src/rmdir.c, src/seq.c, src/setuidgid.c, src/shred.c, src/shuf.c: * src/sleep.c, src/sort.c, src/split.c, src/stat.c, src/stty.c: * src/su.c, src/sum.c, src/sync.c, src/system.h, src/tac.c: * src/tail.c, src/tee.c, src/test.c, src/touch.c, src/tr.c: * src/true.c, src/tsort.c, src/tty.c, src/uname.c, src/unexpand.c: * src/uniq.c, src/unlink.c, src/uptime.c, src/users.c, src/wc.c: * src/who.c, src/whoami.c, src/yes.c: Likewise.
126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
/* hostname - set or print the name of current host system
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Copyright (C) 1994-1997, 1999-2005 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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/* Written by Jim Meyering. */
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#include <config.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include "system.h"
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#include "long-options.h"
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#include "error.h"
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#include "quote.h"
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#include "xgethostname.h"
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/* The official name of this program (e.g., no `g' prefix). */
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#define PROGRAM_NAME "hostname"
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#define AUTHORS "Jim Meyering"
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#if HAVE_SETHOSTNAME && !defined sethostname
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int sethostname ();
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#endif
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#if !defined HAVE_SETHOSTNAME && defined HAVE_SYSINFO && \
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defined HAVE_SYS_SYSTEMINFO_H
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# include <sys/systeminfo.h>
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int
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sethostname (char *name, size_t namelen)
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{
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/* Using sysinfo() is the SVR4 mechanism to set a hostname. */
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return (sysinfo (SI_SET_HOSTNAME, name, namelen) < 0 ? -1 : 0);
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}
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# define HAVE_SETHOSTNAME 1 /* Now we have it... */
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#endif
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/* The name this program was run with. */
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char *program_name;
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void
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usage (int status)
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{
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if (status != EXIT_SUCCESS)
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fprintf (stderr, _("Try `%s --help' for more information.\n"),
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program_name);
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else
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{
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printf (_("\
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Usage: %s [NAME]\n\
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or: %s OPTION\n\
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Print or set the hostname of the current system.\n\
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\n\
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"),
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program_name, program_name);
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fputs (HELP_OPTION_DESCRIPTION, stdout);
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fputs (VERSION_OPTION_DESCRIPTION, stdout);
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emit_bug_reporting_address ();
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}
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exit (status);
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}
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int
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main (int argc, char **argv)
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{
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char *hostname;
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initialize_main (&argc, &argv);
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program_name = argv[0];
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE, LOCALEDIR);
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textdomain (PACKAGE);
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atexit (close_stdout);
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parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
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usage, AUTHORS, (char const *) NULL);
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if (getopt_long (argc, argv, "", NULL, NULL) != -1)
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usage (EXIT_FAILURE);
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if (argc == optind + 1)
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{
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#ifdef HAVE_SETHOSTNAME
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/* Set hostname to operand. */
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char const *name = argv[optind];
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if (sethostname (name, strlen (name)) != 0)
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error (EXIT_FAILURE, errno, _("cannot set name to %s"), quote (name));
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#else
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error (EXIT_FAILURE, 0,
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_("cannot set hostname; this system lacks the functionality"));
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#endif
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}
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if (argc <= optind)
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{
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hostname = xgethostname ();
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if (hostname == NULL)
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error (EXIT_FAILURE, errno, _("cannot determine hostname"));
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printf ("%s\n", hostname);
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}
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if (optind + 1 < argc)
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{
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error (0, 0, _("extra operand %s"), quote (argv[optind + 1]));
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usage (EXIT_FAILURE);
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}
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exit (EXIT_SUCCESS);
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}
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