1 /*- 2 * Copyright (c) 2005 Robert N. M. Watson 3 * Copyright (c) 2012 Jilles Tjoelker 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/types.h> 29 #include <sys/event.h> 30 #include <sys/filio.h> 31 #include <sys/ioctl.h> 32 #include <sys/stat.h> 33 #include <sys/time.h> 34 35 #include <err.h> 36 #include <errno.h> 37 #include <fcntl.h> 38 #include <limits.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 44 /* 45 * Regression test for piddling details of fifos. 46 */ 47 48 /* 49 * All activity occurs within a temporary directory created early in the 50 * test. 51 */ 52 static char temp_dir[PATH_MAX]; 53 54 static void __unused 55 atexit_temp_dir(void) 56 { 57 58 rmdir(temp_dir); 59 } 60 61 static void 62 makefifo(const char *fifoname, const char *testname) 63 { 64 65 if (mkfifo(fifoname, 0700) < 0) 66 err(-1, "%s: makefifo: mkfifo: %s", testname, fifoname); 67 } 68 69 static void 70 cleanfifo(const char *fifoname, int fd1, int fd2) 71 { 72 73 if (fd1 != -1) 74 close(fd1); 75 if (fd2 != -1) 76 close(fd2); 77 (void)unlink(fifoname); 78 } 79 80 static int 81 openfifo(const char *fifoname, int *reader_fdp, int *writer_fdp) 82 { 83 int error, fd1, fd2; 84 85 fd1 = open(fifoname, O_RDONLY | O_NONBLOCK); 86 if (fd1 < 0) 87 return (-1); 88 fd2 = open(fifoname, O_WRONLY | O_NONBLOCK); 89 if (fd2 < 0) { 90 error = errno; 91 close(fd1); 92 errno = error; 93 return (-1); 94 } 95 *reader_fdp = fd1; 96 *writer_fdp = fd2; 97 98 return (0); 99 } 100 101 /* 102 * POSIX does not allow lseek(2) on fifos, so we expect ESPIPE as a result. 103 */ 104 static void 105 test_lseek(void) 106 { 107 int reader_fd, writer_fd; 108 109 makefifo("testfifo", __func__); 110 111 if (openfifo("testfifo", &reader_fd, &writer_fd) < 0) { 112 warn("%s: openfifo", __func__); 113 cleanfifo("testfifo", -1, -1); 114 exit(-1); 115 } 116 117 if (lseek(reader_fd, 1, SEEK_CUR) >= 0) { 118 warnx("%s: lseek succeeded instead of returning ESPIPE", 119 __func__); 120 cleanfifo("testfifo", reader_fd, writer_fd); 121 exit(-1); 122 } 123 if (errno != ESPIPE) { 124 warn("%s: lseek returned instead of ESPIPE", __func__); 125 cleanfifo("testfifo", reader_fd, writer_fd); 126 exit(-1); 127 } 128 129 cleanfifo("testfifo", reader_fd, writer_fd); 130 } 131 132 /* 133 * truncate(2) on FIFO should silently return success. 134 */ 135 static void 136 test_truncate(void) 137 { 138 139 makefifo("testfifo", __func__); 140 141 if (truncate("testfifo", 1024) != 0) { 142 warn("%s: truncate", __func__); 143 cleanfifo("testfifo", -1, -1); 144 exit(-1); 145 } 146 147 cleanfifo("testfifo", -1, -1); 148 } 149 150 static int 151 test_ioctl_setclearflag(int fd, unsigned long flag, const char *testname, 152 const char *fdname, const char *flagname) 153 { 154 int i; 155 156 i = 1; 157 if (ioctl(fd, flag, &i) < 0) { 158 warn("%s:%s: ioctl(%s, %s, 1)", testname, __func__, fdname, 159 flagname); 160 cleanfifo("testfifo", -1, -1); 161 exit(-1); 162 } 163 164 i = 0; 165 if (ioctl(fd, flag, &i) < 0) { 166 warn("%s:%s: ioctl(%s, %s, 0)", testname, __func__, fdname, 167 flagname); 168 cleanfifo("testfifo", -1, -1); 169 exit(-1); 170 } 171 172 return (0); 173 } 174 175 /* 176 * Test that various ioctls can be issued against the file descriptor. We 177 * don't currently test the semantics of these changes here. 178 */ 179 static void 180 test_ioctl(void) 181 { 182 int reader_fd, writer_fd; 183 184 makefifo("testfifo", __func__); 185 186 if (openfifo("testfifo", &reader_fd, &writer_fd) < 0) { 187 warn("%s: openfifo", __func__); 188 cleanfifo("testfifo", -1, -1); 189 exit(-1); 190 } 191 192 /* 193 * Set and remove the non-blocking I/O flag. 194 */ 195 if (test_ioctl_setclearflag(reader_fd, FIONBIO, __func__, 196 "reader_fd", "FIONBIO") < 0) { 197 cleanfifo("testfifo", reader_fd, writer_fd); 198 exit(-1); 199 } 200 201 if (test_ioctl_setclearflag(writer_fd, FIONBIO, __func__, 202 "writer_fd", "FIONBIO") < 0) { 203 cleanfifo("testfifo", reader_fd, writer_fd); 204 exit(-1); 205 } 206 207 /* 208 * Set and remove the async I/O flag. 209 */ 210 if (test_ioctl_setclearflag(reader_fd, FIOASYNC, __func__, 211 "reader_fd", "FIOASYNC") < 0) { 212 cleanfifo("testfifo", reader_fd, writer_fd); 213 exit(-1); 214 } 215 216 if (test_ioctl_setclearflag(writer_fd, FIOASYNC, __func__, 217 "writer_fd", "FIONASYNC") < 0) { 218 cleanfifo("testfifo", reader_fd, writer_fd); 219 exit(-1); 220 } 221 222 cleanfifo("testfifo", reader_fd, writer_fd); 223 } 224 225 /* 226 * fchmod(2)/fchown(2) on FIFO should work. 227 */ 228 static void 229 test_chmodchown(void) 230 { 231 struct stat sb; 232 int reader_fd, writer_fd; 233 uid_t u; 234 gid_t g; 235 236 makefifo("testfifo", __func__); 237 238 if (openfifo("testfifo", &reader_fd, &writer_fd) < 0) { 239 warn("%s: openfifo", __func__); 240 cleanfifo("testfifo", -1, -1); 241 exit(-1); 242 } 243 244 if (fchmod(reader_fd, 0666) != 0) { 245 warn("%s: fchmod", __func__); 246 cleanfifo("testfifo", reader_fd, writer_fd); 247 exit(-1); 248 } 249 250 if (stat("testfifo", &sb) != 0) { 251 warn("%s: stat", __func__); 252 cleanfifo("testfifo", reader_fd, writer_fd); 253 exit(-1); 254 } 255 256 if ((sb.st_mode & 0777) != 0666) { 257 warnx("%s: stat chmod result", __func__); 258 cleanfifo("testfifo", reader_fd, writer_fd); 259 exit(-1); 260 } 261 262 if (fstat(writer_fd, &sb) != 0) { 263 warn("%s: fstat", __func__); 264 cleanfifo("testfifo", reader_fd, writer_fd); 265 exit(-1); 266 } 267 268 if ((sb.st_mode & 0777) != 0666) { 269 warnx("%s: fstat chmod result", __func__); 270 cleanfifo("testfifo", reader_fd, writer_fd); 271 exit(-1); 272 } 273 274 if (fchown(reader_fd, -1, -1) != 0) { 275 warn("%s: fchown 1", __func__); 276 cleanfifo("testfifo", reader_fd, writer_fd); 277 exit(-1); 278 } 279 280 u = geteuid(); 281 if (u == 0) 282 u = 1; 283 g = getegid(); 284 if (fchown(reader_fd, u, g) != 0) { 285 warn("%s: fchown 2", __func__); 286 cleanfifo("testfifo", reader_fd, writer_fd); 287 exit(-1); 288 } 289 if (stat("testfifo", &sb) != 0) { 290 warn("%s: stat", __func__); 291 cleanfifo("testfifo", reader_fd, writer_fd); 292 exit(-1); 293 } 294 295 if (sb.st_uid != u || sb.st_gid != g) { 296 warnx("%s: stat chown result", __func__); 297 cleanfifo("testfifo", reader_fd, writer_fd); 298 exit(-1); 299 } 300 301 if (fstat(writer_fd, &sb) != 0) { 302 warn("%s: fstat", __func__); 303 cleanfifo("testfifo", reader_fd, writer_fd); 304 exit(-1); 305 } 306 307 if (sb.st_uid != u || sb.st_gid != g) { 308 warnx("%s: fstat chown result", __func__); 309 cleanfifo("testfifo", reader_fd, writer_fd); 310 exit(-1); 311 } 312 313 cleanfifo("testfifo", -1, -1); 314 } 315 316 int 317 main(void) 318 { 319 320 strcpy(temp_dir, "fifo_misc.XXXXXXXXXXX"); 321 if (mkdtemp(temp_dir) == NULL) 322 err(-1, "mkdtemp"); 323 atexit(atexit_temp_dir); 324 325 if (chdir(temp_dir) < 0) 326 err(-1, "chdir %s", temp_dir); 327 328 test_lseek(); 329 test_truncate(); 330 test_ioctl(); 331 test_chmodchown(); 332 333 return (0); 334 } 335