1/* vi: set sw=4 ts=4: */ 2/* 3 * Mini chroot implementation for busybox 4 * 5 * 6 * Copyright (C) 1999,2000,2001 by Lineo, inc. 7 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 */ 24 25#include <stdlib.h> 26#include <stdio.h> 27#include <unistd.h> 28#include <errno.h> 29#include "busybox.h" 30 31int chroot_main(int argc, char **argv) 32{ 33 char *prog; 34 35 if ((argc < 2) || (**(argv + 1) == '-')) { 36 show_usage(); 37 } 38 argc--; 39 argv++; 40 41 if (chroot(*argv) || (chdir("/"))) { 42 perror_msg_and_die("cannot change root directory to %s", *argv); 43 } 44 45 argc--; 46 argv++; 47 if (argc >= 1) { 48 prog = *argv; 49 execvp(*argv, argv); 50 } else { 51#if defined(BB_SH) && defined BB_FEATURE_SH_STANDALONE_SHELL 52 char shell[] = "/bin/sh"; 53 char *shell_argv[2] = { shell, NULL }; 54 applet_name = shell; 55 shell_main(1, shell_argv); 56 return EXIT_SUCCESS; 57#else 58 prog = getenv("SHELL"); 59 if (!prog) 60 prog = "/bin/sh"; 61 execlp(prog, prog, NULL); 62#endif 63 } 64 perror_msg_and_die("cannot execute %s", prog); 65 66} 67 68 69/* 70Local Variables: 71c-file-style: "linux" 72c-basic-offset: 4 73tab-width: 4 74End: 75*/ 76