1/* vi: set sw=4 ts=4: */
2/*
3 * Mini chroot implementation for busybox
4 *
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
8 */
9
10/* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */
11
12#include "libbb.h"
13
14int chroot_main(int argc, char **argv);
15int chroot_main(int argc, char **argv)
16{
17	if (argc < 2) {
18		bb_show_usage();
19	}
20
21	++argv;
22	if (chroot(*argv)) {
23		bb_perror_msg_and_die("cannot change root directory to %s", *argv);
24	}
25	xchdir("/");
26
27	++argv;
28	if (argc == 2) {
29		argv -= 2;
30		argv[0] = getenv("SHELL");
31		if (!argv[0]) {
32			argv[0] = (char *) DEFAULT_SHELL;
33		}
34		argv[1] = (char *) "-i";
35	}
36
37	BB_EXECVP(*argv, argv);
38	bb_perror_msg_and_die("cannot execute %s", *argv);
39}
40