/*
* Mini chroot implementation for busybox
*
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
- * Copyright (C) 1999,2000 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-#include "busybox.h"
+/* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */
+
#include <stdlib.h>
#include <stdio.h>
+#include <unistd.h>
#include <errno.h>
+#include "busybox.h"
int chroot_main(int argc, char **argv)
{
- char *prog;
-
- if ((argc < 2) || (**(argv + 1) == '-')) {
- usage(chroot_usage);
+ if (argc < 2) {
+ bb_show_usage();
}
- argc--;
- argv++;
- if (chroot(*argv) || (chdir("/"))) {
- perror_msg_and_die("cannot change root directory to %s", *argv);
+ ++argv;
+ if (chroot(*argv)) {
+ bb_perror_msg_and_die("cannot change root directory to %s", *argv);
}
-
- argc--;
- argv++;
- if (argc >= 1) {
- prog = *argv;
- execvp(*argv, argv);
- } else {
-#ifndef BB_SH
- prog = getenv("SHELL");
- if (!prog)
- prog = "/bin/sh";
- execlp(prog, prog, NULL);
-#else
- shell_main(argc, argv);
- return EXIT_SUCCESS;
-#endif
+ bb_xchdir("/");
+
+ ++argv;
+ if (argc == 2) {
+ argv -= 2;
+ if (!(*argv = getenv("SHELL"))) {
+ *argv = (char *) DEFAULT_SHELL;
+ }
+ argv[1] = (char *) "-i";
}
- perror_msg_and_die("cannot execute %s", prog);
+ execvp(*argv, argv);
+ bb_perror_msg_and_die("cannot execute %s", *argv);
}
-
-
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/