1 /* $NetBSD: t_proc2.c,v 1.2 2015/01/14 22:22:32 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Peter Werner <Peter.Werner@wgsn.com>. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __COPYRIGHT("@(#) Copyright (c) 2008\ 34 The NetBSD Foundation, inc. All rights reserved."); 35 __RCSID("$NetBSD: t_proc2.c,v 1.2 2015/01/14 22:22:32 christos Exp $"); 36 37 #ifdef __FreeBSD__ 38 #include <sys/types.h> 39 #endif 40 #include <sys/event.h> 41 #include <sys/time.h> 42 #include <sys/types.h> 43 #include <sys/wait.h> 44 45 #include <err.h> 46 #include <pwd.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <unistd.h> 50 51 #include <atf-c.h> 52 53 #include "../../h_macros.h" 54 55 static void 56 child_two(void) 57 { 58 _exit(EXIT_SUCCESS); 59 } 60 61 static void 62 child_one(void) 63 { 64 pid_t pid; 65 struct passwd *pwd; 66 const char *nam = "nobody"; 67 68 pwd = getpwnam(nam); 69 if (pwd == NULL) 70 err(EXIT_FAILURE, "getpwnam(\"%s\")", nam); 71 72 if ((setuid(pwd->pw_uid)) == -1) 73 err(EXIT_FAILURE, "setuid(%d)", pwd->pw_uid); 74 75 pid = fork(); 76 if (pid == -1) 77 err(EXIT_FAILURE, "fork()"); 78 79 if (pid == 0) 80 child_two(); 81 82 _exit(EXIT_SUCCESS); 83 } 84 85 ATF_TC(proc2); 86 ATF_TC_HEAD(proc2, tc) 87 { 88 atf_tc_set_md_var(tc, "require.user", "root"); 89 atf_tc_set_md_var(tc, "descr", 90 "Checks EVFILT_PROC for NOTE_FORK|NOTE_TRACK error path problem " 91 "fixed in rev. 1.1.1.1.2.17 of sys/kern/kern_event.c"); 92 } 93 ATF_TC_BODY(proc2, tc) 94 { 95 pid_t pid = 0; 96 int kq, status; 97 struct kevent ke; 98 struct timespec timeout; 99 100 RL(kq = kqueue()); 101 102 timeout.tv_sec = 0; 103 timeout.tv_nsec = 0; 104 105 RL(pid = fork()); 106 if (pid == 0) { 107 (void)sleep(1); /* let parent set kevent */ 108 child_one(); 109 /* NOTREACHED */ 110 } 111 112 EV_SET(&ke, (uintptr_t)pid, EVFILT_PROC, EV_ADD, NOTE_FORK|NOTE_TRACK, 113 0, 0); 114 115 RL(kevent(kq, &ke, 1, NULL, 0, &timeout)); 116 117 (void)sleep(2); 118 119 ke.ident = 0; 120 ke.fflags = 0; 121 ke.flags = EV_ENABLE; 122 123 RL(kevent(kq, NULL, 0, &ke, 1, &timeout)); 124 RL(close(kq)); 125 126 RL(waitpid(pid, &status, 0)); 127 ATF_REQUIRE(WIFEXITED(status)); 128 ATF_REQUIRE_EQ(WEXITSTATUS(status), EXIT_SUCCESS); 129 130 /* 131 * we are expecting an error here as we should not have 132 * been able to add a knote to child 2. 133 */ 134 ATF_REQUIRE(ke.fflags & NOTE_TRACKERR); 135 } 136 137 ATF_TP_ADD_TCS(tp) 138 { 139 ATF_TP_ADD_TC(tp, proc2); 140 141 return atf_no_error(); 142 } 143