1 /* 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. 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 static char copyright[] = 36 "@(#) Copyright (c) 1988, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)chroot.c 8.1 (Berkeley) 6/9/93"; 42 #endif /* not lint */ 43 44 #include <sys/types.h> 45 46 #include <err.h> 47 #include <errno.h> 48 #include <paths.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <unistd.h> 53 54 void usage __P((void)); 55 56 int 57 main(argc, argv) 58 int argc; 59 char *argv[]; 60 { 61 int ch; 62 char *shell; 63 64 while ((ch = getopt(argc, argv, "")) != EOF) 65 switch(ch) { 66 case '?': 67 default: 68 usage(); 69 } 70 argc -= optind; 71 argv += optind; 72 73 if (argc < 1) 74 usage(); 75 76 if (chdir(argv[0]) || chroot(".")) 77 err(1, "%s", argv[0]); 78 79 if (argv[1]) { 80 execvp(argv[1], &argv[1]); 81 err(1, "%s", argv[1]); 82 } 83 84 if (!(shell = getenv("SHELL"))) 85 shell = _PATH_BSHELL; 86 execlp(shell, shell, "-i", NULL); 87 err(1, "%s", shell); 88 /* NOTREACHED */ 89 } 90 91 void 92 usage() 93 { 94 (void)fprintf(stderr, "usage: chroot newroot [command]\n"); 95 exit(1); 96 } 97