1 /* $OpenBSD: t_pipe2.c,v 1.2 2020/11/09 23:18:51 bluhm Exp $ */ 2 /* $NetBSD: t_pipe2.c,v 1.9 2017/01/13 21:19:45 christos Exp $ */ 3 4 /*- 5 * Copyright (c) 2011 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Christos Zoulas. 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 #include "macros.h" 41 42 #include <sys/cdefs.h> 43 __RCSID("$NetBSD: t_pipe2.c,v 1.9 2017/01/13 21:19:45 christos Exp $"); 44 45 #include "atf-c.h" 46 #include <fcntl.h> 47 #include <unistd.h> 48 #include <stdlib.h> 49 #include <errno.h> 50 #include <sys/resource.h> 51 52 static void 53 run(int flags) 54 { 55 int fd[2], i; 56 57 while ((i = open("/", O_RDONLY)) < 3) 58 ATF_REQUIRE(i != -1); 59 60 ATF_REQUIRE_MSG(closefrom(3) != -1, "closefrom failed: %s", 61 strerror(errno)); 62 63 ATF_REQUIRE(pipe2(fd, flags) == 0); 64 65 ATF_REQUIRE(fd[0] == 3); 66 ATF_REQUIRE(fd[1] == 4); 67 68 if (flags & O_CLOEXEC) { 69 ATF_REQUIRE((fcntl(fd[0], F_GETFD) & FD_CLOEXEC) != 0); 70 ATF_REQUIRE((fcntl(fd[1], F_GETFD) & FD_CLOEXEC) != 0); 71 } else { 72 ATF_REQUIRE((fcntl(fd[0], F_GETFD) & FD_CLOEXEC) == 0); 73 ATF_REQUIRE((fcntl(fd[1], F_GETFD) & FD_CLOEXEC) == 0); 74 } 75 76 if (flags & O_NONBLOCK) { 77 ATF_REQUIRE((fcntl(fd[0], F_GETFL) & O_NONBLOCK) != 0); 78 ATF_REQUIRE((fcntl(fd[1], F_GETFL) & O_NONBLOCK) != 0); 79 } else { 80 ATF_REQUIRE((fcntl(fd[0], F_GETFL) & O_NONBLOCK) == 0); 81 ATF_REQUIRE((fcntl(fd[1], F_GETFL) & O_NONBLOCK) == 0); 82 } 83 84 #ifndef __OpenBSD__ 85 /* F_GETNOSIGPIPE not available */ 86 if (flags & O_NOSIGPIPE) { 87 ATF_REQUIRE(fcntl(fd[0], F_GETNOSIGPIPE) != 0); 88 ATF_REQUIRE(fcntl(fd[1], F_GETNOSIGPIPE) != 0); 89 } else { 90 ATF_REQUIRE(fcntl(fd[0], F_GETNOSIGPIPE) == 0); 91 ATF_REQUIRE(fcntl(fd[1], F_GETNOSIGPIPE) == 0); 92 } 93 #endif 94 95 ATF_REQUIRE(close(fd[0]) != -1); 96 ATF_REQUIRE(close(fd[1]) != -1); 97 } 98 99 ATF_TC(pipe2_basic); 100 ATF_TC_HEAD(pipe2_basic, tc) 101 { 102 atf_tc_set_md_var(tc, "descr", "A basic test of pipe2(2)"); 103 } 104 105 ATF_TC_BODY(pipe2_basic, tc) 106 { 107 run(0); 108 } 109 110 ATF_TC(pipe2_consume); 111 ATF_TC_HEAD(pipe2_consume, tc) 112 { 113 atf_tc_set_md_var(tc, "descr", "Test that consuming file descriptors " 114 "with pipe2(2) does not crash the system (PR kern/46457)"); 115 } 116 117 ATF_TC_BODY(pipe2_consume, tc) 118 { 119 struct rlimit rl; 120 int err, filedes[2]; 121 int old; 122 123 ATF_REQUIRE_MSG(closefrom(4) != -1, "closefrom failed: %s", 124 strerror(errno)); 125 126 err = getrlimit(RLIMIT_NOFILE, &rl); 127 ATF_REQUIRE(err == 0); 128 /* 129 * The heart of this test is to run against the number of open 130 * file descriptor limit in the middle of a pipe2() call - i.e. 131 * before the call only a single descriptor may be openend. 132 */ 133 old = rl.rlim_cur; 134 rl.rlim_cur = 4; 135 err = setrlimit(RLIMIT_NOFILE, &rl); 136 ATF_REQUIRE(err == 0); 137 138 err = pipe2(filedes, O_CLOEXEC); 139 ATF_REQUIRE(err == -1); 140 rl.rlim_cur = old; 141 err = setrlimit(RLIMIT_NOFILE, &rl); 142 } 143 144 ATF_TC(pipe2_nonblock); 145 ATF_TC_HEAD(pipe2_nonblock, tc) 146 { 147 atf_tc_set_md_var(tc, "descr", "A non-blocking test of pipe2(2)"); 148 } 149 150 ATF_TC_BODY(pipe2_nonblock, tc) 151 { 152 run(O_NONBLOCK); 153 } 154 155 ATF_TC(pipe2_cloexec); 156 ATF_TC_HEAD(pipe2_cloexec, tc) 157 { 158 atf_tc_set_md_var(tc, "descr", "A close-on-exec test of pipe2(2)"); 159 } 160 161 ATF_TC_BODY(pipe2_cloexec, tc) 162 { 163 run(O_CLOEXEC); 164 } 165 166 ATF_TC(pipe2_nosigpipe); 167 ATF_TC_HEAD(pipe2_nosigpipe, tc) 168 { 169 atf_tc_set_md_var(tc, "descr", "A no sigpipe test of pipe2(2)"); 170 } 171 172 ATF_TC_BODY(pipe2_nosigpipe, tc) 173 { 174 run(O_NOSIGPIPE); 175 } 176 177 ATF_TC(pipe2_einval); 178 ATF_TC_HEAD(pipe2_einval, tc) 179 { 180 atf_tc_set_md_var(tc, "descr", "A error check of pipe2(2)"); 181 } 182 183 ATF_TC_BODY(pipe2_einval, tc) 184 { 185 int fd[2]; 186 ATF_REQUIRE_ERRNO(EINVAL, pipe2(fd, O_ASYNC) == -1); 187 } 188 189 ATF_TP_ADD_TCS(tp) 190 { 191 192 ATF_TP_ADD_TC(tp, pipe2_basic); 193 ATF_TP_ADD_TC(tp, pipe2_consume); 194 ATF_TP_ADD_TC(tp, pipe2_nonblock); 195 ATF_TP_ADD_TC(tp, pipe2_cloexec); 196 #ifndef __OpenBSD__ 197 /* O_NOSIGPIPE not available */ 198 ATF_TP_ADD_TC(tp, pipe2_nosigpipe); 199 #endif 200 ATF_TP_ADD_TC(tp, pipe2_einval); 201 202 return atf_no_error(); 203 } 204