1 /* chroot -- run command or shell with special root directory
2 Copyright (C) 95, 96, 1997, 1999-2003 Free Software Foundation, Inc.
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)
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.
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. */
18 /* Written by Roland McGrath. */
22 #include <sys/types.h>
25 #include "long-options.h"
28 /* The official name of this program (e.g., no `g' prefix). */
29 #define PROGRAM_NAME "chroot"
31 #define AUTHORS "Roland McGrath"
33 /* The name this program was run with, for error messages. */
40 fprintf (stderr, _("Try `%s --help' for more information.\n"),
45 Usage: %s NEWROOT [COMMAND...]\n\
47 "), program_name, program_name);
49 Run COMMAND with root directory set to NEWROOT.\n\
52 fputs (HELP_OPTION_DESCRIPTION, stdout);
53 fputs (VERSION_OPTION_DESCRIPTION, stdout);
56 If no command is given, run ``${SHELL} -i'' (default: /bin/sh).\n\
58 printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
64 main (int argc, char **argv)
66 initialize_main (&argc, &argv);
67 program_name = argv[0];
68 setlocale (LC_ALL, "");
69 bindtextdomain (PACKAGE, LOCALEDIR);
72 atexit (close_stdout);
74 parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
75 usage, AUTHORS, NULL);
78 error (0, 0, _("too few arguments"));
83 error (EXIT_FAILURE, errno,
84 _("cannot change root directory to %s"), argv[1]);
87 error (EXIT_FAILURE, errno, _("cannot chdir to root directory"));
91 /* No command. Run an interactive shell. */
92 char *shell = getenv ("SHELL");
100 /* The following arguments give the command. */
104 /* Execute the given command. */
105 execvp (argv[0], argv);
108 int exit_status = (errno == ENOENT ? 127 : 126);
109 error (0, errno, "%s", argv[0]);