1 /* $OpenBSD: t_mkfifo.c,v 1.1.1.1 2019/11/19 19:57:03 bluhm Exp $ */ 2 /* $NetBSD: t_mkfifo.c,v 1.3 2019/06/20 03:31:54 kamil 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 Jukka Ruohonen. 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 "macros.h" 34 35 #include <sys/cdefs.h> 36 __RCSID("$NetBSD: t_mkfifo.c,v 1.3 2019/06/20 03:31:54 kamil Exp $"); 37 38 #include <sys/stat.h> 39 #include <sys/wait.h> 40 41 #include "atf-c.h" 42 #include <errno.h> 43 #include <fcntl.h> 44 #include <limits.h> 45 #include <stdlib.h> 46 #include <signal.h> 47 #include <string.h> 48 #include <unistd.h> 49 50 static const char path[] = "fifo"; 51 static void support(void); 52 53 static void 54 support(void) 55 { 56 57 errno = 0; 58 59 if (mkfifo(path, 0600) == 0) { 60 ATF_REQUIRE(unlink(path) == 0); 61 return; 62 } 63 64 if (errno == EOPNOTSUPP) 65 atf_tc_skip("the kernel does not support FIFOs"); 66 else { 67 atf_tc_fail("mkfifo(2) failed"); 68 } 69 } 70 71 ATF_TC_WITH_CLEANUP(mkfifo_block); 72 ATF_TC_HEAD(mkfifo_block, tc) 73 { 74 atf_tc_set_md_var(tc, "descr", "Test that FIFOs block"); 75 } 76 77 ATF_TC_BODY(mkfifo_block, tc) 78 { 79 int sta, fd = -1; 80 pid_t pid; 81 82 support(); 83 84 ATF_REQUIRE(mkfifo(path, 0600) == 0); 85 86 pid = fork(); 87 ATF_REQUIRE(pid >= 0); 88 89 if (pid == 0) { 90 91 /* 92 * If we open the FIFO as read-only (write-only), 93 * the call should block until another process 94 * opens the FIFO for writing (reading). 95 */ 96 fd = open(path, O_RDONLY); 97 98 _exit(EXIT_FAILURE); /* NOTREACHED */ 99 } 100 101 (void)sleep(1); 102 103 ATF_REQUIRE(kill(pid, SIGKILL) == 0); 104 105 (void)wait(&sta); 106 107 if (WIFSIGNALED(sta) == 0 || WTERMSIG(sta) != SIGKILL) 108 atf_tc_fail("FIFO did not block"); 109 110 (void)close(fd); 111 (void)unlink(path); 112 } 113 114 ATF_TC_CLEANUP(mkfifo_block, tc) 115 { 116 (void)unlink(path); 117 } 118 119 ATF_TC_WITH_CLEANUP(mkfifo_err); 120 ATF_TC_HEAD(mkfifo_err, tc) 121 { 122 atf_tc_set_md_var(tc, "descr", "Test erros from mkfifo(2)"); 123 } 124 125 ATF_TC_BODY(mkfifo_err, tc) 126 { 127 char buf[PATH_MAX + 1]; 128 129 support(); 130 131 (void)memset(buf, 'x', sizeof(buf)); 132 ATF_REQUIRE(mkfifo(path, 0600) == 0); 133 134 errno = 0; 135 ATF_REQUIRE_ERRNO(EFAULT, mkfifo((char *)-1, 0600) == -1); 136 137 errno = 0; 138 ATF_REQUIRE_ERRNO(EEXIST, mkfifo("/etc/passwd", 0600) == -1); 139 140 errno = 0; 141 ATF_REQUIRE_ERRNO(EEXIST, mkfifo(path, 0600) == -1); 142 143 errno = 0; 144 ATF_REQUIRE_ERRNO(ENAMETOOLONG, mkfifo(buf, 0600) == -1); 145 146 errno = 0; 147 ATF_REQUIRE_ERRNO(ENOENT, mkfifo("/a/b/c/d/e/f/g", 0600) == -1); 148 149 ATF_REQUIRE(unlink(path) == 0); 150 } 151 152 ATF_TC_CLEANUP(mkfifo_err, tc) 153 { 154 (void)unlink(path); 155 } 156 157 ATF_TC_WITH_CLEANUP(mkfifo_nonblock); 158 ATF_TC_HEAD(mkfifo_nonblock, tc) 159 { 160 atf_tc_set_md_var(tc, "descr", "Test O_NONBLOCK with FIFOs"); 161 } 162 163 ATF_TC_BODY(mkfifo_nonblock, tc) 164 { 165 int fd, sta; 166 pid_t pid; 167 168 support(); 169 170 fd = -1; 171 ATF_REQUIRE(mkfifo(path, 0600) == 0); 172 173 pid = fork(); 174 ATF_REQUIRE(pid >= 0); 175 176 if (pid == 0) { 177 178 /* 179 * If we open the FIFO as O_NONBLOCK, the O_RDONLY 180 * call should return immediately, whereas the call 181 * for write-only should fail with ENXIO. 182 */ 183 fd = open(path, O_RDONLY | O_NONBLOCK); 184 185 if (fd >= 0) 186 _exit(EXIT_SUCCESS); 187 188 (void)pause(); /* NOTREACHED */ 189 } 190 191 (void)sleep(1); 192 193 errno = 0; 194 ATF_REQUIRE_ERRNO(ENXIO, open(path, O_WRONLY | O_NONBLOCK) == -1); 195 196 (void)kill(pid, SIGKILL); 197 (void)wait(&sta); 198 199 if (WIFSIGNALED(sta) != 0 || WTERMSIG(sta) == SIGKILL) 200 atf_tc_fail("FIFO blocked for O_NONBLOCK open(2)"); 201 202 (void)close(fd); 203 (void)unlink(path); 204 } 205 206 ATF_TC_CLEANUP(mkfifo_nonblock, tc) 207 { 208 (void)unlink(path); 209 } 210 211 ATF_TC_WITH_CLEANUP(mkfifo_perm); 212 ATF_TC_HEAD(mkfifo_perm, tc) 213 { 214 atf_tc_set_md_var(tc, "descr", "Test permissions with mkfifo(2)"); 215 atf_tc_set_md_var(tc, "require.user", "unprivileged"); 216 } 217 218 ATF_TC_BODY(mkfifo_perm, tc) 219 { 220 221 support(); 222 223 errno = 0; 224 ATF_REQUIRE_ERRNO(EACCES, mkfifo("/root/fifo", 0600) == -1); 225 226 ATF_REQUIRE(mkfifo(path, 0600) == 0); 227 228 /* 229 * For some reason this fails with EFTYPE... 230 */ 231 errno = 0; 232 ATF_REQUIRE_ERRNO(EFTYPE, chmod(path, 1777) == -1); 233 234 ATF_REQUIRE(unlink(path) == 0); 235 } 236 237 ATF_TC_CLEANUP(mkfifo_perm, tc) 238 { 239 (void)unlink(path); 240 } 241 242 ATF_TC_WITH_CLEANUP(mkfifo_stat); 243 ATF_TC_HEAD(mkfifo_stat, tc) 244 { 245 atf_tc_set_md_var(tc, "descr", "Test mkfifo(2) with stat"); 246 } 247 248 ATF_TC_BODY(mkfifo_stat, tc) 249 { 250 struct stat st; 251 252 support(); 253 254 (void)memset(&st, 0, sizeof(struct stat)); 255 256 ATF_REQUIRE(mkfifo(path, 0600) == 0); 257 ATF_REQUIRE(stat(path, &st) == 0); 258 259 if (S_ISFIFO(st.st_mode) == 0) 260 atf_tc_fail("invalid mode from mkfifo(2)"); 261 262 ATF_REQUIRE(unlink(path) == 0); 263 } 264 265 ATF_TC_CLEANUP(mkfifo_stat, tc) 266 { 267 (void)unlink(path); 268 } 269 270 ATF_TC_WITH_CLEANUP(mknod_s_ififo); 271 ATF_TC_HEAD(mknod_s_ififo, tc) 272 { 273 atf_tc_set_md_var(tc, "descr", "Test mknod(2) with S_IFIFO"); 274 } 275 276 ATF_TC_BODY(mknod_s_ififo, tc) 277 { 278 struct stat st; 279 280 support(); 281 282 (void)memset(&st, 0, sizeof(struct stat)); 283 284 ATF_REQUIRE(mknod(path, S_IFIFO | 0600, 0) == 0); 285 ATF_REQUIRE(stat(path, &st) == 0); 286 287 if (S_ISFIFO(st.st_mode) == 0) 288 atf_tc_fail("invalid mode from mknod(2) with S_IFIFO"); 289 290 ATF_REQUIRE(unlink(path) == 0); 291 } 292 293 ATF_TC_CLEANUP(mknod_s_ififo, tc) 294 { 295 (void)unlink(path); 296 } 297 298 ATF_TP_ADD_TCS(tp) 299 { 300 301 ATF_TP_ADD_TC(tp, mkfifo_block); 302 ATF_TP_ADD_TC(tp, mkfifo_err); 303 ATF_TP_ADD_TC(tp, mkfifo_nonblock); 304 ATF_TP_ADD_TC(tp, mkfifo_perm); 305 ATF_TP_ADD_TC(tp, mkfifo_stat); 306 ATF_TP_ADD_TC(tp, mknod_s_ififo); 307 308 return atf_no_error(); 309 } 310