1 /* $NetBSD: h_spawn.c,v 1.2 2021/05/02 11:18:11 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles Zhang <charles@NetBSD.org> and 9 * Martin Husemann <martin@NetBSD.org>. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <unistd.h> 37 38 int 39 main(int argc, char **argv) 40 { 41 unsigned long ret; 42 char *endp; 43 44 if (argc == 2 && strcmp(argv[1], "--resetids") == 0) { 45 if (getuid() != geteuid() || getgid() != getegid()) { 46 fprintf(stderr, "uid/gid do not match effective ids, " 47 "uid: %d euid: %d gid: %d egid: %d\n", 48 getuid(), geteuid(), getgid(), getegid()); 49 exit(255); 50 } 51 return 0; 52 } else if (argc != 2) { 53 fprintf(stderr, "usage:\n\t%s (retcode)\n", getprogname()); 54 exit(255); 55 } 56 ret = strtoul(argv[1], &endp, 10); 57 if (*endp != 0) { 58 fprintf(stderr, 59 "invalid arg: %s\n" 60 "usage:\n\t%s (retcode)\n", endp, getprogname()); 61 exit(255); 62 } 63 64 fprintf(stderr, "%s exiting with status %lu\n", getprogname(), ret); 65 return ret; 66 } 67