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 are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #ifndef lint 19 char copyright[] = 20 "@(#) Copyright (c) 1988 The Regents of the University of California.\n\ 21 All rights reserved.\n"; 22 #endif /* not lint */ 23 24 #ifndef lint 25 static char sccsid[] = "@(#)chroot.c 5.5 (Berkeley) 05/11/89"; 26 #endif /* not lint */ 27 28 #include <stdio.h> 29 #include <paths.h> 30 31 main(argc, argv) 32 int argc; 33 char **argv; 34 { 35 extern int errno; 36 char *shell, *getenv(), *strerror(); 37 38 if (argc < 2) { 39 fprintf(stderr, "usage: chroot newroot [command]\n"); 40 exit(1); 41 } 42 if (chdir(argv[1]) || chroot(argv[1])) 43 fatal(argv[1]); 44 setuid(getuid()); 45 if (argv[2]) { 46 execvp(argv[2], &argv[2]); 47 fatal(argv[2]); 48 } else { 49 if (!(shell = getenv("SHELL"))) 50 shell = _PATH_BSHELL; 51 execlp(shell, shell, "-i", (char *)NULL); 52 fatal(shell); 53 } 54 /* NOTREACHED */ 55 } 56 57 fatal(msg) 58 char *msg; 59 { 60 extern int errno; 61 62 fprintf(stderr, "chroot: %s: %s\n", msg, strerror(errno)); 63 exit(1); 64 } 65