busybox/coreutils/chroot.c

/* vi: set sw=4 ts=4: */
/*
 * Mini chroot implementation for busybox
 *
 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

/* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */

#include "busybox.h"

int chroot_main(int argc, char **argv)
{
	if (argc < 2) {
		bb_show_usage();
	}

	++argv;
	if (chroot(*argv)) {
		bb_perror_msg_and_die("cannot change root directory to %s", *argv);
	}
	xchdir("/");

	++argv;
	if (argc == 2) {
		argv -= 2;
		if (!(*argv = getenv("SHELL"))) {
			*argv = (char *) DEFAULT_SHELL;
		}
		argv[1] = (char *) "-i";
	}

	execvp(*argv, argv);
	bb_perror_msg_and_die("cannot execute %s", *argv);
}
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 "busybox.h"
13
14	int chroot_main(int argc, char **argv)
15	{
16	if (argc < 2) {
17	bb_show_usage();
18	}
19
20	++argv;
21	if (chroot(*argv)) {
22	bb_perror_msg_and_die("cannot change root directory to %s", *argv);
23	}
24	xchdir("/");
25
26	++argv;
27	if (argc == 2) {
28	argv -= 2;
29	if (!(*argv = getenv("SHELL"))) {
30	argv = (char ) DEFAULT_SHELL;
31	}
32	argv[1] = (char *) "-i";
33	}
34
35	execvp(*argv, argv);
36	bb_perror_msg_and_die("cannot execute %s", *argv);
37	}