1/* vi: set sw=4 ts=4: */
2/*
3 * Mini chroot implementation for busybox
4 *
5 *
6 * Copyright (C) 1999,2000,2001 by Lineo, inc.
7 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
25#include <stdlib.h>
26#include <stdio.h>
27#include <unistd.h>
28#include <errno.h>
29#include "busybox.h"
30
31int chroot_main(int argc, char **argv)
32{
33	char *prog;
34
35	if ((argc < 2) || (**(argv + 1) == '-')) {
36		show_usage();
37	}
38	argc--;
39	argv++;
40
41	if (chroot(*argv) || (chdir("/"))) {
42		perror_msg_and_die("cannot change root directory to %s", *argv);
43	}
44
45	argc--;
46	argv++;
47	if (argc >= 1) {
48		prog = *argv;
49		execvp(*argv, argv);
50	} else {
51#if defined(BB_SH) && defined BB_FEATURE_SH_STANDALONE_SHELL
52		char shell[] = "/bin/sh";
53		char *shell_argv[2] = { shell, NULL };
54		applet_name = shell;
55		shell_main(1, shell_argv);
56		return EXIT_SUCCESS;
57#else
58		prog = getenv("SHELL");
59		if (!prog)
60			prog = "/bin/sh";
61		execlp(prog, prog, NULL);
62#endif
63	}
64	perror_msg_and_die("cannot execute %s", prog);
65
66}
67
68
69/*
70Local Variables:
71c-file-style: "linux"
72c-basic-offset: 4
73tab-width: 4
74End:
75*/
76