*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
+//config:config CHROOT
+//config: bool "chroot (3.7 kb)"
+//config: default y
+//config: help
+//config: chroot is used to change the root directory and run a command.
+//config: The default command is '/bin/sh'.
+
+//applet:IF_CHROOT(APPLET_NOEXEC(chroot, chroot, BB_DIR_USR_SBIN, BB_SUID_DROP, chroot))
+
+//kbuild:lib-$(CONFIG_CHROOT) += chroot.o
/* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */
+//usage:#define chroot_trivial_usage
+//usage: "NEWROOT [PROG ARGS]"
+//usage:#define chroot_full_usage "\n\n"
+//usage: "Run PROG with root directory set to NEWROOT"
+//usage:
+//usage:#define chroot_example_usage
+//usage: "$ ls -l /bin/ls\n"
+//usage: "lrwxrwxrwx 1 root root 12 Apr 13 00:46 /bin/ls -> /BusyBox\n"
+//usage: "# mount /dev/hdc1 /mnt -t minix\n"
+//usage: "# chroot /mnt\n"
+//usage: "# ls -l /bin/ls\n"
+//usage: "-rwxr-xr-x 1 root root 40816 Feb 5 07:45 /bin/ls*\n"
+
#include "libbb.h"
int chroot_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int chroot_main(int argc, char **argv)
+int chroot_main(int argc UNUSED_PARAM, char **argv)
{
- if (argc < 2) {
+ ++argv;
+ if (!*argv)
bb_show_usage();
- }
- ++argv;
xchroot(*argv);
- xchdir("/");
++argv;
- if (argc == 2) {
+ 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";
+ argv[0] = (char *) get_shell_name();
+ argv[1] = (char *) "-i"; /* GNU coreutils 8.4 compat */
+ /*argv[2] = NULL; - already is */
}
- BB_EXECVP(*argv, argv);
- bb_perror_msg_and_die("can't execute '%s'", *argv);
+ BB_EXECVP_or_die(argv);
}