/* vi: set sw=4 ts=4: *//* * Mini chroot implementation for busybox * * * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen * Copyright (C) 1999,2000,2001 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 * */#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) == '-')) {		show_usage();	}	argc--;	argv++;	if (chroot(*argv) || (chdir("/"))) {		perror_msg_and_die("cannot change root directory to %s", *argv);	}	argc--;	argv++;	if (argc >= 1) {		prog = *argv;		execvp(*argv, argv);	} else {#if defined shell_main && defined BB_FEATURE_SH_STANDALONE_SHELL		char shell[] = "/bin/sh";		char *shell_argv[2] = { shell, NULL };		applet_name = shell;		shell_main(1, shell_argv);		return EXIT_SUCCESS;#else		prog = getenv("SHELL");		if (!prog)			prog = "/bin/sh";		execlp(prog, prog, NULL);#endif	}	perror_msg_and_die("cannot execute %s", prog);}/*Local Variables:c-file-style: "linux"c-basic-offset: 4tab-width: 4End:*/