+/* vi: set sw=4 ts=4: */
/*
* Mini chroot implementation for busybox
*
- * Copyright (C) 1998 by Erik Andersen <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
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-#include "internal.h"
+/* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */
+
#include <stdlib.h>
#include <stdio.h>
+#include <unistd.h>
#include <errno.h>
-
-
-static const char chroot_usage[] = "NEWROOT [COMMAND...]\n"
-"Run COMMAND with root directory set to NEWROOT.\n";
-
-
+#include "busybox.h"
int chroot_main(int argc, char **argv)
{
- if ( (argc < 2) || (**(argv+1) == '-') ) {
- usage( chroot_usage);
- }
- argc--;
- argv++;
-
- if (chroot (*argv) || (chdir ("/"))) {
- fprintf(stderr, "chroot: cannot change root directory to %s: %s\n",
- *argv, strerror(errno));
- exit( FALSE);
- }
-
- argc--;
- argv++;
- if (argc >= 1) {
- fprintf(stderr, "command: %s\n", *argv);
- execvp (*argv, argv);
- }
- else {
- char *prog;
- prog = getenv ("SHELL");
- if (!prog)
- prog = "/bin/sh";
- execlp (prog, prog, NULL);
- }
- fprintf(stderr, "chroot: cannot execute %s: %s\n",
- *argv, strerror(errno));
- exit( FALSE);
+ if (argc < 2) {
+ bb_show_usage();
+ }
+
+ ++argv;
+ if (chroot(*argv)) {
+ bb_perror_msg_and_die("cannot change root directory to %s", *argv);
+ }
+ bb_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);
}
-