1 /* 2 * Copyright (c) 1988 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 char copyright[] = 36 "@(#) Copyright (c) 1988 The Regents of the University of California.\n\ 37 All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)chroot.c 5.8 (Berkeley) 6/1/90"; 42 #endif /* not lint */ 43 44 #include <stdio.h> 45 #include <paths.h> 46 #include <string.h> 47 48 main(argc, argv) 49 int argc; 50 char **argv; 51 { 52 extern int errno; 53 char *shell, *getenv(); 54 55 if (argc < 2) { 56 (void)fprintf(stderr, "usage: chroot newroot [command]\n"); 57 exit(1); 58 } 59 if (chdir(argv[1]) || chroot(".")) 60 fatal(argv[1]); 61 if (argv[2]) { 62 execvp(argv[2], &argv[2]); 63 fatal(argv[2]); 64 } else { 65 if (!(shell = getenv("SHELL"))) 66 shell = _PATH_BSHELL; 67 execlp(shell, shell, "-i", (char *)NULL); 68 fatal(shell); 69 } 70 /* NOTREACHED */ 71 } 72 73 fatal(msg) 74 char *msg; 75 { 76 extern int errno; 77 78 (void)fprintf(stderr, "chroot: %s: %s\n", msg, strerror(errno)); 79 exit(1); 80 } 81