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 static char rcsid[] = "$NetBSD: chroot.c,v 1.5 1997/03/06 07:00:52 mikel Exp $"; 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 47 #include <err.h> 48 #include <errno.h> 49 #include <paths.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 55 void usage __P((void)); 56 57 int 58 main(argc, argv) 59 int argc; 60 char *argv[]; 61 { 62 int ch; 63 char *shell; 64 65 while ((ch = getopt(argc, argv, "")) != -1) 66 switch(ch) { 67 case '?': 68 default: 69 usage(); 70 } 71 argc -= optind; 72 argv += optind; 73 74 if (argc < 1) 75 usage(); 76 77 if (chdir(argv[0]) || chroot(".")) 78 err(1, "%s", argv[0]); 79 80 if (argv[1]) { 81 execvp(argv[1], &argv[1]); 82 err(1, "%s", argv[1]); 83 } 84 85 if (!(shell = getenv("SHELL"))) 86 shell = _PATH_BSHELL; 87 execlp(shell, shell, "-i", NULL); 88 err(1, "%s", shell); 89 /* NOTREACHED */ 90 } 91 92 void 93 usage() 94 { 95 (void)fprintf(stderr, "usage: chroot newroot [command]\n"); 96 exit(1); 97 } 98