1 /* chroot -- run command or shell with special root directory
2 Copyright (C) 95, 96, 1997, 1999-2004, 2007 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 3 of the License, or
7 (at your option) any later version.
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, see <http://www.gnu.org/licenses/>. */
17 /* Written by Roland McGrath. */
22 #include <sys/types.h>
26 #include "long-options.h"
29 /* The official name of this program (e.g., no `g' prefix). */
30 #define PROGRAM_NAME "chroot"
32 #define AUTHORS "Roland McGrath"
34 /* The name this program was run with, for error messages. */
40 if (status
!= EXIT_SUCCESS
)
41 fprintf (stderr
, _("Try `%s --help' for more information.\n"),
46 Usage: %s NEWROOT [COMMAND...]\n\
48 "), program_name
, program_name
);
50 Run COMMAND with root directory set to NEWROOT.\n\
53 fputs (HELP_OPTION_DESCRIPTION
, stdout
);
54 fputs (VERSION_OPTION_DESCRIPTION
, stdout
);
57 If no command is given, run ``${SHELL} -i'' (default: /bin/sh).\n\
59 emit_bug_reporting_address ();
65 main (int argc
, char **argv
)
67 initialize_main (&argc
, &argv
);
68 program_name
= argv
[0];
69 setlocale (LC_ALL
, "");
70 bindtextdomain (PACKAGE
, LOCALEDIR
);
73 initialize_exit_failure (EXIT_FAILURE
);
74 atexit (close_stdout
);
76 parse_long_options (argc
, argv
, PROGRAM_NAME
, PACKAGE_NAME
, VERSION
,
77 usage
, AUTHORS
, (char const *) NULL
);
78 if (getopt_long (argc
, argv
, "+", NULL
, NULL
) != -1)
83 error (0, 0, _("missing operand"));
87 if (chroot (argv
[optind
]) != 0)
88 error (EXIT_FAILURE
, errno
, _("cannot change root directory to %s"), argv
[1]);
91 error (EXIT_FAILURE
, errno
, _("cannot chdir to root directory"));
93 if (argc
== optind
+ 1)
95 /* No command. Run an interactive shell. */
96 char *shell
= getenv ("SHELL");
105 /* The following arguments give the command. */
109 /* Execute the given command. */
110 execvp (argv
[0], argv
);
113 int exit_status
= (errno
== ENOENT
? EXIT_ENOENT
: EXIT_CANNOT_INVOKE
);
114 error (0, errno
, _("cannot run command %s"), quote (argv
[0]));