1 /* $NetBSD: t_pipe2.c,v 1.9 2017/01/13 21:19:45 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2011 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 #include <sys/cdefs.h> 39 __RCSID("$NetBSD: t_pipe2.c,v 1.9 2017/01/13 21:19:45 christos Exp $"); 40 41 #include <atf-c.h> 42 #include <fcntl.h> 43 #include <unistd.h> 44 #include <stdlib.h> 45 #include <errno.h> 46 #include <sys/resource.h> 47 48 static void 49 run(int flags) 50 { 51 int fd[2], i; 52 53 while ((i = open("/", O_RDONLY)) < 3) 54 ATF_REQUIRE(i != -1); 55 56 #ifdef __NetBSD__ 57 /* This check is harmful since it closes atf's output file */ 58 ATF_REQUIRE_MSG(closefrom(3) != -1, "closefrom failed: %s", 59 strerror(errno)); 60 #endif 61 62 ATF_REQUIRE(pipe2(fd, flags) == 0); 63 64 #ifdef __NetBSD__ 65 /* This check is harmful since it requires closing atf's output file */ 66 ATF_REQUIRE(fd[0] == 3); 67 ATF_REQUIRE(fd[1] == 4); 68 #endif 69 70 if (flags & O_CLOEXEC) { 71 ATF_REQUIRE((fcntl(fd[0], F_GETFD) & FD_CLOEXEC) != 0); 72 ATF_REQUIRE((fcntl(fd[1], F_GETFD) & FD_CLOEXEC) != 0); 73 } else { 74 ATF_REQUIRE((fcntl(fd[0], F_GETFD) & FD_CLOEXEC) == 0); 75 ATF_REQUIRE((fcntl(fd[1], F_GETFD) & FD_CLOEXEC) == 0); 76 } 77 78 if (flags & O_NONBLOCK) { 79 ATF_REQUIRE((fcntl(fd[0], F_GETFL) & O_NONBLOCK) != 0); 80 ATF_REQUIRE((fcntl(fd[1], F_GETFL) & O_NONBLOCK) != 0); 81 } else { 82 ATF_REQUIRE((fcntl(fd[0], F_GETFL) & O_NONBLOCK) == 0); 83 ATF_REQUIRE((fcntl(fd[1], F_GETFL) & O_NONBLOCK) == 0); 84 } 85 86 #ifndef __FreeBSD__ 87 if (flags & O_NOSIGPIPE) { 88 ATF_REQUIRE(fcntl(fd[0], F_GETNOSIGPIPE) != 0); 89 ATF_REQUIRE(fcntl(fd[1], F_GETNOSIGPIPE) != 0); 90 } else { 91 ATF_REQUIRE(fcntl(fd[0], F_GETNOSIGPIPE) == 0); 92 ATF_REQUIRE(fcntl(fd[1], F_GETNOSIGPIPE) == 0); 93 } 94 #endif 95 96 ATF_REQUIRE(close(fd[0]) != -1); 97 ATF_REQUIRE(close(fd[1]) != -1); 98 } 99 100 ATF_TC(pipe2_basic); 101 ATF_TC_HEAD(pipe2_basic, tc) 102 { 103 atf_tc_set_md_var(tc, "descr", "A basic test of pipe2(2)"); 104 } 105 106 ATF_TC_BODY(pipe2_basic, tc) 107 { 108 run(0); 109 } 110 111 ATF_TC(pipe2_consume); 112 ATF_TC_HEAD(pipe2_consume, tc) 113 { 114 atf_tc_set_md_var(tc, "descr", "Test that consuming file descriptors " 115 "with pipe2(2) does not crash the system (PR kern/46457)"); 116 } 117 118 ATF_TC_BODY(pipe2_consume, tc) 119 { 120 struct rlimit rl; 121 int err, filedes[2]; 122 int old; 123 124 #ifdef __FreeBSD__ 125 closefrom(4); 126 #else 127 ATF_REQUIRE_MSG(closefrom(4) != -1, "closefrom failed: %s", 128 strerror(errno)); 129 #endif 130 131 err = getrlimit(RLIMIT_NOFILE, &rl); 132 ATF_REQUIRE(err == 0); 133 /* 134 * The heart of this test is to run against the number of open 135 * file descriptor limit in the middle of a pipe2() call - i.e. 136 * before the call only a single descriptor may be openend. 137 */ 138 old = rl.rlim_cur; 139 rl.rlim_cur = 4; 140 err = setrlimit(RLIMIT_NOFILE, &rl); 141 ATF_REQUIRE(err == 0); 142 143 err = pipe2(filedes, O_CLOEXEC); 144 ATF_REQUIRE(err == -1); 145 rl.rlim_cur = old; 146 err = setrlimit(RLIMIT_NOFILE, &rl); 147 } 148 149 ATF_TC(pipe2_nonblock); 150 ATF_TC_HEAD(pipe2_nonblock, tc) 151 { 152 atf_tc_set_md_var(tc, "descr", "A non-blocking test of pipe2(2)"); 153 } 154 155 ATF_TC_BODY(pipe2_nonblock, tc) 156 { 157 run(O_NONBLOCK); 158 } 159 160 ATF_TC(pipe2_cloexec); 161 ATF_TC_HEAD(pipe2_cloexec, tc) 162 { 163 atf_tc_set_md_var(tc, "descr", "A close-on-exec test of pipe2(2)"); 164 } 165 166 ATF_TC_BODY(pipe2_cloexec, tc) 167 { 168 run(O_CLOEXEC); 169 } 170 171 #ifdef __NetBSD__ 172 ATF_TC(pipe2_nosigpipe); 173 ATF_TC_HEAD(pipe2_nosigpipe, tc) 174 { 175 atf_tc_set_md_var(tc, "descr", "A no sigpipe test of pipe2(2)"); 176 } 177 178 ATF_TC_BODY(pipe2_nosigpipe, tc) 179 { 180 run(O_NOSIGPIPE); 181 } 182 #endif 183 184 ATF_TC(pipe2_einval); 185 ATF_TC_HEAD(pipe2_einval, tc) 186 { 187 atf_tc_set_md_var(tc, "descr", "A error check of pipe2(2)"); 188 } 189 190 ATF_TC_BODY(pipe2_einval, tc) 191 { 192 int fd[2]; 193 ATF_REQUIRE_ERRNO(EINVAL, pipe2(fd, O_ASYNC) == -1); 194 } 195 196 ATF_TP_ADD_TCS(tp) 197 { 198 199 ATF_TP_ADD_TC(tp, pipe2_basic); 200 ATF_TP_ADD_TC(tp, pipe2_consume); 201 ATF_TP_ADD_TC(tp, pipe2_nonblock); 202 ATF_TP_ADD_TC(tp, pipe2_cloexec); 203 #ifdef __NetBSD__ 204 ATF_TP_ADD_TC(tp, pipe2_nosigpipe); 205 #endif 206 ATF_TP_ADD_TC(tp, pipe2_einval); 207 208 return atf_no_error(); 209 } 210