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 "libbb.h"

int chroot_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int chroot_main(int argc UNUSED_PARAM, char **argv)
{
	++argv;
	if (!*argv)
		bb_show_usage();
	xchroot(*argv);
	xchdir("/");

	++argv;
	if (!*argv) { /* no 2nd param (PROG), use shell */
		argv -= 2;
		argv[0] = getenv("SHELL");
		if (!argv[0]) {
			argv[0] = (char *) DEFAULT_SHELL;
		}
		argv[1] = (char *) "-i";
	}

	BB_EXECVP(*argv, argv);
	bb_perror_msg_and_die("can't 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 "libbb.h"
13
14	int chroot_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
15	int chroot_main(int argc UNUSED_PARAM, char **argv)
16	{
17	++argv;
18	if (!*argv)
19	bb_show_usage();
20	xchroot(*argv);
21	xchdir("/");
22
23	++argv;
24	if (!argv) { / no 2nd param (PROG), use shell */
25	argv -= 2;
26	argv[0] = getenv("SHELL");
27	if (!argv[0]) {
28	argv[0] = (char *) DEFAULT_SHELL;
29	}
30	argv[1] = (char *) "-i";
31	}
32
33	BB_EXECVP(*argv, argv);
34	bb_perror_msg_and_die("can't execute '%s'", *argv);
35	}