chroot.c revision 29448
11553Srgrimes/* 21553Srgrimes * Copyright (c) 1988, 1993 31553Srgrimes * The Regents of the University of California. All rights reserved. 41553Srgrimes * 51553Srgrimes * Redistribution and use in source and binary forms, with or without 61553Srgrimes * modification, are permitted provided that the following conditions 71553Srgrimes * are met: 81553Srgrimes * 1. Redistributions of source code must retain the above copyright 91553Srgrimes * notice, this list of conditions and the following disclaimer. 101553Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111553Srgrimes * notice, this list of conditions and the following disclaimer in the 121553Srgrimes * documentation and/or other materials provided with the distribution. 131553Srgrimes * 3. All advertising materials mentioning features or use of this software 141553Srgrimes * must display the following acknowledgement: 151553Srgrimes * This product includes software developed by the University of 161553Srgrimes * California, Berkeley and its contributors. 171553Srgrimes * 4. Neither the name of the University nor the names of its contributors 181553Srgrimes * may be used to endorse or promote products derived from this software 191553Srgrimes * without specific prior written permission. 201553Srgrimes * 211553Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221553Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231553Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241553Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251553Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261553Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271553Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281553Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291553Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301553Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311553Srgrimes * SUCH DAMAGE. 321553Srgrimes */ 331553Srgrimes 341553Srgrimes#ifndef lint 3529448Scharnierstatic const char copyright[] = 361553Srgrimes"@(#) Copyright (c) 1988, 1993\n\ 371553Srgrimes The Regents of the University of California. All rights reserved.\n"; 381553Srgrimes#endif /* not lint */ 391553Srgrimes 401553Srgrimes#ifndef lint 4129448Scharnier#if 0 421553Srgrimesstatic char sccsid[] = "@(#)chroot.c 8.1 (Berkeley) 6/9/93"; 4329448Scharnier#endif 4429448Scharnierstatic const char rcsid[] = 4529448Scharnier "$Id$"; 461553Srgrimes#endif /* not lint */ 471553Srgrimes 481553Srgrimes#include <sys/types.h> 491553Srgrimes 501553Srgrimes#include <err.h> 511553Srgrimes#include <paths.h> 521553Srgrimes#include <stdio.h> 531553Srgrimes#include <stdlib.h> 541553Srgrimes#include <string.h> 551553Srgrimes#include <unistd.h> 561553Srgrimes 5729448Scharnierstatic void usage __P((void)); 581553Srgrimes 591553Srgrimesint 601553Srgrimesmain(argc, argv) 611553Srgrimes int argc; 621553Srgrimes char *argv[]; 631553Srgrimes{ 641553Srgrimes int ch; 651553Srgrimes char *shell; 661553Srgrimes 6724428Simp while ((ch = getopt(argc, argv, "")) != -1) 681553Srgrimes switch(ch) { 691553Srgrimes case '?': 701553Srgrimes default: 711553Srgrimes usage(); 721553Srgrimes } 731553Srgrimes argc -= optind; 741553Srgrimes argv += optind; 751553Srgrimes 761553Srgrimes if (argc < 1) 771553Srgrimes usage(); 781553Srgrimes 791553Srgrimes if (chdir(argv[0]) || chroot(".")) 801553Srgrimes err(1, "%s", argv[0]); 811553Srgrimes 821553Srgrimes if (argv[1]) { 831553Srgrimes execvp(argv[1], &argv[1]); 841553Srgrimes err(1, "%s", argv[1]); 851553Srgrimes } 861553Srgrimes 871553Srgrimes if (!(shell = getenv("SHELL"))) 881553Srgrimes shell = _PATH_BSHELL; 891553Srgrimes execlp(shell, shell, "-i", NULL); 901553Srgrimes err(1, "%s", shell); 911553Srgrimes /* NOTREACHED */ 921553Srgrimes} 931553Srgrimes 9429448Scharnierstatic void 951553Srgrimesusage() 961553Srgrimes{ 971553Srgrimes (void)fprintf(stderr, "usage: chroot newroot [command]\n"); 981553Srgrimes exit(1); 991553Srgrimes} 100