1 /*- 2 * Copyright (c) 2004 Joerg Sonnenberger <joerg@bec.de> 3 * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD: src/usr.sbin/jexec/jexec.c,v 1.2 2003/07/04 19:14:27 bmilekic Exp $ 28 * $DragonFly: src/usr.sbin/jexec/jexec.c,v 1.2 2006/08/22 13:02:30 joerg Exp $ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/jail.h> 33 34 #include <err.h> 35 #include <errno.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <unistd.h> 39 40 static int getjailid(const char *str); 41 static void usage(void); 42 43 int 44 main(int argc, char **argv) 45 { 46 int jid; 47 48 if (argc < 3) 49 usage(); 50 jid = getjailid(argv[1]); 51 if (jail_attach(jid) == -1) 52 err(1, "jail_attach(%d) failed", jid); 53 if (chdir("/") == -1) 54 err(1, "chdir(\"/\") failed"); 55 if (execvp(argv[2], argv + 2) == -1) 56 err(1, "execvp(%s) failed", argv[2]); 57 exit(0); 58 } 59 60 static void 61 usage(void) 62 { 63 fprintf(stderr, "usage: jexec jid command [...]\n"); 64 exit(1); 65 } 66 67 static int 68 getjailid(const char *str) 69 { 70 long v; 71 char *ep; 72 73 errno = 0; 74 v = strtol(str, &ep, 10); 75 if (v < INT_MIN || v > INT_MAX || errno == ERANGE) 76 errc(1, ERANGE, "invalid jail id: %s", str); 77 if (ep == str || *ep != '\0') 78 errx(1, "cannot parse jail id: %s.", str); 79 80 return((int)(v)); 81 } 82