1 /* 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char copyright[] = 10 "@(#) Copyright (c) 1988, 1993\n\ 11 The Regents of the University of California. All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)chroot.c 8.1 (Berkeley) 06/09/93"; 16 #endif /* not lint */ 17 18 #include <sys/types.h> 19 20 #include <err.h> 21 #include <errno.h> 22 #include <paths.h> 23 #include <stdio.h> 24 #include <stdlib.h> 25 #include <string.h> 26 #include <unistd.h> 27 28 void usage __P((void)); 29 30 int 31 main(argc, argv) 32 int argc; 33 char *argv[]; 34 { 35 int ch; 36 char *shell; 37 38 while ((ch = getopt(argc, argv, "")) != EOF) 39 switch(ch) { 40 case '?': 41 default: 42 usage(); 43 } 44 argc -= optind; 45 argv += optind; 46 47 if (argc < 1) 48 usage(); 49 50 if (chdir(argv[0]) || chroot(".")) 51 err(1, "%s", argv[0]); 52 53 if (argv[1]) { 54 execvp(argv[1], &argv[1]); 55 err(1, "%s", argv[1]); 56 } 57 58 if (!(shell = getenv("SHELL"))) 59 shell = _PATH_BSHELL; 60 execlp(shell, shell, "-i", NULL); 61 err(1, "%s", shell); 62 /* NOTREACHED */ 63 } 64 65 void 66 usage() 67 { 68 (void)fprintf(stderr, "usage: chroot newroot [command]\n"); 69 exit(1); 70 } 71