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 ATF_REQUIRE_MSG(closefrom(3) != -1, "closefrom failed: %s", 57 strerror(errno)); 58 59 ATF_REQUIRE(pipe2(fd, flags) == 0); 60 61 ATF_REQUIRE(fd[0] == 3); 62 ATF_REQUIRE(fd[1] == 4); 63 64 if (flags & O_CLOEXEC) { 65 ATF_REQUIRE((fcntl(fd[0], F_GETFD) & FD_CLOEXEC) != 0); 66 ATF_REQUIRE((fcntl(fd[1], F_GETFD) & FD_CLOEXEC) != 0); 67 } else { 68 ATF_REQUIRE((fcntl(fd[0], F_GETFD) & FD_CLOEXEC) == 0); 69 ATF_REQUIRE((fcntl(fd[1], F_GETFD) & FD_CLOEXEC) == 0); 70 } 71 72 if (flags & O_NONBLOCK) { 73 ATF_REQUIRE((fcntl(fd[0], F_GETFL) & O_NONBLOCK) != 0); 74 ATF_REQUIRE((fcntl(fd[1], F_GETFL) & O_NONBLOCK) != 0); 75 } else { 76 ATF_REQUIRE((fcntl(fd[0], F_GETFL) & O_NONBLOCK) == 0); 77 ATF_REQUIRE((fcntl(fd[1], F_GETFL) & O_NONBLOCK) == 0); 78 } 79 80 if (flags & O_NOSIGPIPE) { 81 ATF_REQUIRE(fcntl(fd[0], F_GETNOSIGPIPE) != 0); 82 ATF_REQUIRE(fcntl(fd[1], F_GETNOSIGPIPE) != 0); 83 } else { 84 ATF_REQUIRE(fcntl(fd[0], F_GETNOSIGPIPE) == 0); 85 ATF_REQUIRE(fcntl(fd[1], F_GETNOSIGPIPE) == 0); 86 } 87 88 ATF_REQUIRE(close(fd[0]) != -1); 89 ATF_REQUIRE(close(fd[1]) != -1); 90 } 91 92 ATF_TC(pipe2_basic); 93 ATF_TC_HEAD(pipe2_basic, tc) 94 { 95 atf_tc_set_md_var(tc, "descr", "A basic test of pipe2(2)"); 96 } 97 98 ATF_TC_BODY(pipe2_basic, tc) 99 { 100 run(0); 101 } 102 103 ATF_TC(pipe2_consume); 104 ATF_TC_HEAD(pipe2_consume, tc) 105 { 106 atf_tc_set_md_var(tc, "descr", "Test that consuming file descriptors " 107 "with pipe2(2) does not crash the system (PR kern/46457)"); 108 } 109 110 ATF_TC_BODY(pipe2_consume, tc) 111 { 112 struct rlimit rl; 113 int err, filedes[2]; 114 int old; 115 116 ATF_REQUIRE_MSG(closefrom(4) != -1, "closefrom failed: %s", 117 strerror(errno)); 118 119 err = getrlimit(RLIMIT_NOFILE, &rl); 120 ATF_REQUIRE(err == 0); 121 /* 122 * The heart of this test is to run against the number of open 123 * file descriptor limit in the middle of a pipe2() call - i.e. 124 * before the call only a single descriptor may be openend. 125 */ 126 old = rl.rlim_cur; 127 rl.rlim_cur = 4; 128 err = setrlimit(RLIMIT_NOFILE, &rl); 129 ATF_REQUIRE(err == 0); 130 131 err = pipe2(filedes, O_CLOEXEC); 132 ATF_REQUIRE(err == -1); 133 rl.rlim_cur = old; 134 err = setrlimit(RLIMIT_NOFILE, &rl); 135 } 136 137 ATF_TC(pipe2_nonblock); 138 ATF_TC_HEAD(pipe2_nonblock, tc) 139 { 140 atf_tc_set_md_var(tc, "descr", "A non-blocking test of pipe2(2)"); 141 } 142 143 ATF_TC_BODY(pipe2_nonblock, tc) 144 { 145 run(O_NONBLOCK); 146 } 147 148 ATF_TC(pipe2_cloexec); 149 ATF_TC_HEAD(pipe2_cloexec, tc) 150 { 151 atf_tc_set_md_var(tc, "descr", "A close-on-exec test of pipe2(2)"); 152 } 153 154 ATF_TC_BODY(pipe2_cloexec, tc) 155 { 156 run(O_CLOEXEC); 157 } 158 159 ATF_TC(pipe2_nosigpipe); 160 ATF_TC_HEAD(pipe2_nosigpipe, tc) 161 { 162 atf_tc_set_md_var(tc, "descr", "A no sigpipe test of pipe2(2)"); 163 } 164 165 ATF_TC_BODY(pipe2_nosigpipe, tc) 166 { 167 run(O_NOSIGPIPE); 168 } 169 170 ATF_TC(pipe2_einval); 171 ATF_TC_HEAD(pipe2_einval, tc) 172 { 173 atf_tc_set_md_var(tc, "descr", "A error check of pipe2(2)"); 174 } 175 176 ATF_TC_BODY(pipe2_einval, tc) 177 { 178 int fd[2]; 179 ATF_REQUIRE_ERRNO(EINVAL, pipe2(fd, O_ASYNC) == -1); 180 } 181 182 ATF_TP_ADD_TCS(tp) 183 { 184 185 ATF_TP_ADD_TC(tp, pipe2_basic); 186 ATF_TP_ADD_TC(tp, pipe2_consume); 187 ATF_TP_ADD_TC(tp, pipe2_nonblock); 188 ATF_TP_ADD_TC(tp, pipe2_cloexec); 189 ATF_TP_ADD_TC(tp, pipe2_nosigpipe); 190 ATF_TP_ADD_TC(tp, pipe2_einval); 191 192 return atf_no_error(); 193 } 194