plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Copyright (c) International Business Machines Corp., 2001 |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 13 | * the GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | |
| 20 | /* |
| 21 | * NAME |
| 22 | * fcnlt08.c |
| 23 | * |
| 24 | * DESCRIPTION |
| 25 | * Testcase to check locking of regions of a file |
| 26 | * |
| 27 | * CALLS |
| 28 | * fcntl |
| 29 | * |
| 30 | * ALGORITHM |
| 31 | * Test unlocking sections around a write lock |
| 32 | * |
| 33 | * USAGE |
nstraz | fa31d55 | 2002-05-14 16:50:06 +0000 | [diff] [blame^] | 34 | * fcntl19 |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 35 | * |
| 36 | * HISTORY |
| 37 | * 07/2001 Ported by Wayne Boyer |
| 38 | * |
| 39 | * RESTRICTIONS |
| 40 | * None |
| 41 | */ |
| 42 | |
| 43 | #include <fcntl.h> |
| 44 | #include <errno.h> |
| 45 | #include <signal.h> |
| 46 | #include <test.h> |
| 47 | #include <usctest.h> |
| 48 | |
| 49 | #define STRINGSIZE 27 |
| 50 | #define STRING "abcdefghijklmnopqrstuvwxyz\n" |
| 51 | #define STOP 0xFFF0 |
| 52 | |
| 53 | int parent_pipe[2]; |
| 54 | int child_pipe[2]; |
| 55 | int fd; |
| 56 | int parent_pid, child_pid; |
| 57 | char *file; |
| 58 | |
| 59 | void parent_put(); |
| 60 | void parent_get(); |
| 61 | void child_put(); |
| 62 | void child_get(); |
| 63 | void stop_child(); |
| 64 | void compare_lock(struct flock *, short, short, int, int, short); |
| 65 | void unlock_file(); |
| 66 | void do_test(struct flock *, short, short, int, int); |
| 67 | void catch_child(); |
| 68 | char *str_type(); |
| 69 | int do_lock(int, short, short, int , int); |
| 70 | |
nstraz | fa31d55 | 2002-05-14 16:50:06 +0000 | [diff] [blame^] | 71 | char *TCID = "fcntl19"; |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 72 | int TST_TOTAL = 1; |
| 73 | extern int Tst_count; |
| 74 | |
| 75 | void setup(void); |
| 76 | void cleanup(void); |
| 77 | |
| 78 | int fail = 0; |
| 79 | |
| 80 | main(int ac, char **av) |
| 81 | { |
| 82 | struct flock tl; |
| 83 | |
| 84 | int lc; /* loop counter */ |
| 85 | char *msg; /* message returned from parse_opts */ |
| 86 | |
| 87 | /* parse standard options */ |
| 88 | if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){ |
| 89 | tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg); |
| 90 | } |
| 91 | |
| 92 | setup(); /* global setup */ |
| 93 | |
| 94 | /* Check for looping state if -i option is given */ |
| 95 | for (lc = 0; TEST_LOOPING(lc); lc++) { |
| 96 | /* reset Tst_count in case we are looping */ |
| 97 | Tst_count = 0; |
| 98 | |
| 99 | if ((child_pid = fork()) == 0) { /* child */ |
| 100 | do_child(); |
| 101 | } else if (child_pid < 0) { |
| 102 | tst_resm(TFAIL, "Fork failed"); |
| 103 | cleanup(); |
| 104 | } |
| 105 | |
| 106 | /* parent */ |
| 107 | |
| 108 | (void)close(parent_pipe[0]); |
| 109 | (void)close(child_pipe[1]); |
| 110 | |
| 111 | block1: |
| 112 | tst_resm(TINFO, "Enter block 1"); |
| 113 | /* |
| 114 | * Add a write lock to the middle of the file and unlock a |
| 115 | * section just before the lock |
| 116 | */ |
| 117 | if (do_lock(F_SETLK, (short)F_WRLCK, (short)0, 10, 5) < 0) { |
| 118 | tst_resm(TFAIL, "fcntl on file %s failed, errno =%d", |
| 119 | file, errno); |
| 120 | fail = 1; |
| 121 | } |
| 122 | |
| 123 | if (do_lock(F_SETLK, (short)F_UNLCK, (short)0, 5, 5) < 0) { |
| 124 | tst_resm(TFAIL, "fcntl on file %s failed, errno =%d", |
| 125 | file, errno); |
| 126 | fail = 1; |
| 127 | } |
| 128 | |
| 129 | /* |
| 130 | * Test write lock |
| 131 | */ |
| 132 | do_test(&tl, (short)F_WRLCK, (short)0, 0, 0); |
| 133 | compare_lock(&tl, (short)F_WRLCK, (short)0, 10, 5, parent_pid); |
| 134 | |
| 135 | /* |
| 136 | * Test that the rest of the file is unlocked |
| 137 | */ |
| 138 | do_test(&tl, (short)F_WRLCK, (short)0, 15, 0); |
| 139 | compare_lock(&tl, (short)F_UNLCK, (short)0, 15, 0, (short)0); |
| 140 | |
| 141 | /* |
| 142 | * remove all the locks set above |
| 143 | */ |
| 144 | unlock_file(); |
| 145 | |
| 146 | if (fail) { |
| 147 | tst_resm(TINFO, "Test block 1: FAILED"); |
| 148 | } else { |
| 149 | tst_resm(TINFO, "Test block 1: PASSED"); |
| 150 | } |
| 151 | tst_resm(TINFO, "Exit block 1"); |
| 152 | |
| 153 | block2: |
| 154 | tst_resm(TINFO, "Enter block 2"); |
| 155 | fail = 0; |
| 156 | /* |
| 157 | * Set a write lock in the middle and do an unlock that |
| 158 | * ends at the first byte of the write lock. |
| 159 | */ |
| 160 | if (do_lock(F_SETLK, (short)F_WRLCK, (short)0, 10, 5) < 0) { |
| 161 | tst_resm(TFAIL, "fcntl on file %s failed, errno =%d", |
| 162 | file, errno); |
| 163 | fail = 1; |
| 164 | } |
| 165 | |
| 166 | if (do_lock(F_SETLK, (short)F_UNLCK, (short)0, 5, 6) < 0) { |
| 167 | tst_resm(TFAIL, "fcntl on file %s failed, errno =%d", |
| 168 | file, errno); |
| 169 | fail = 1; |
| 170 | } |
| 171 | |
| 172 | /* |
| 173 | * Test write lock |
| 174 | */ |
| 175 | do_test(&tl, (short)F_WRLCK, (short)0, 0, 0); |
| 176 | compare_lock(&tl, (short)F_WRLCK, (short)0, 11, 4, parent_pid); |
| 177 | |
| 178 | /* |
| 179 | * Test to make sure the rest of the file is unlocked |
| 180 | */ |
| 181 | do_test(&tl, (short)F_WRLCK, (short)0, 15, 0); |
| 182 | compare_lock(&tl, (short)F_UNLCK, (short)0, 15, 0, (short)0); |
| 183 | |
| 184 | /* |
| 185 | * remove all the locks set above |
| 186 | */ |
| 187 | unlock_file(); |
| 188 | |
| 189 | if (fail) { |
| 190 | tst_resm(TINFO, "Test block 2: FAILED"); |
| 191 | } else { |
| 192 | tst_resm(TINFO, "Test block 2: PASSED"); |
| 193 | } |
| 194 | tst_resm(TINFO, "Exit block 2"); |
| 195 | |
| 196 | block3: |
| 197 | tst_resm(TINFO, "Enter block 3"); |
| 198 | fail = 0; |
| 199 | |
| 200 | /* |
| 201 | * Set a write lock on the middle of the file and do an |
| 202 | * unlock that overlaps the front of the write |
| 203 | */ |
| 204 | if (do_lock(F_SETLK, (short)F_WRLCK, (short)0, 10, 5) < 0) { |
| 205 | tst_resm(TFAIL, "fcntl on file %s failed, errno =%d", |
| 206 | file, errno); |
| 207 | fail = 1; |
| 208 | } |
| 209 | |
| 210 | if (do_lock(F_SETLK, (short)F_UNLCK, (short)0, 5, 8) < 0) { |
| 211 | tst_resm(TFAIL, "fcntl on file %s failed, errno =%d", |
| 212 | file, errno); |
| 213 | fail = 1; |
| 214 | } |
| 215 | |
| 216 | /* |
| 217 | * Test the write lock |
| 218 | */ |
| 219 | do_test(&tl, (short)F_WRLCK, (short)0, 0, 0); |
| 220 | compare_lock(&tl, (short)F_WRLCK, (short)0, 13, 2, parent_pid); |
| 221 | |
| 222 | /* |
| 223 | * Test to make sure the rest of the file is unlocked |
| 224 | */ |
| 225 | do_test(&tl, (short)F_WRLCK, (short)0, 15, 0); |
| 226 | compare_lock(&tl, (short)F_UNLCK, (short)0, 15, 0, (short)0); |
| 227 | |
| 228 | /* |
| 229 | * remove all the locks set above |
| 230 | */ |
| 231 | unlock_file(); |
| 232 | |
| 233 | if (fail) { |
| 234 | tst_resm(TINFO, "Test block 3: FAILED"); |
| 235 | } else { |
| 236 | tst_resm(TINFO, "Test block 3: PASSED"); |
| 237 | } |
| 238 | tst_resm(TINFO, "Exit block 3"); |
| 239 | |
| 240 | block4: |
| 241 | tst_resm(TINFO, "Enter blcok 4"); |
| 242 | fail = 0; |
| 243 | |
| 244 | /* |
| 245 | * Set a write a lock in the middle of a file and unlock a |
| 246 | * section in the middle of it |
| 247 | */ |
| 248 | if (do_lock(F_SETLK, (short)F_WRLCK, (short)0, 10, 10) < 0) { |
| 249 | tst_resm(TFAIL, "fcntl on file %s failed, errno =%d", |
| 250 | file, errno); |
| 251 | fail = 1; |
| 252 | } |
| 253 | |
| 254 | if (do_lock(F_SETLK, (short)F_UNLCK, (short)0, 13, 5) < 0) { |
| 255 | tst_resm(TFAIL, "fcntl on file %s failed, errno =%d", |
| 256 | file, errno); |
| 257 | fail = 1; |
| 258 | } |
| 259 | |
| 260 | /* |
| 261 | * Test the first write lock |
| 262 | */ |
| 263 | do_test(&tl, (short)F_WRLCK, (short)0, 0, 0); |
| 264 | compare_lock(&tl, (short)F_WRLCK, (short)0, 10, 3, parent_pid); |
| 265 | |
| 266 | /* |
| 267 | * Test the second write lock |
| 268 | */ |
| 269 | do_test(&tl, (short)F_WRLCK, (short)0, 13, 0); |
| 270 | compare_lock(&tl, (short)F_WRLCK, (short)0, 18, 2, parent_pid); |
| 271 | |
| 272 | /* |
| 273 | * Test to make sure the rest of the file is unlocked |
| 274 | */ |
| 275 | do_test(&tl, (short)F_WRLCK, (short)0, 20, 0); |
| 276 | compare_lock(&tl, (short)F_UNLCK, (short)0, 20, 0, (short)0); |
| 277 | |
| 278 | /* |
| 279 | * remove all the locks set above |
| 280 | */ |
| 281 | unlock_file(); |
| 282 | |
| 283 | if (fail) { |
| 284 | tst_resm(TINFO, "Test block 4: FAILED"); |
| 285 | } else { |
| 286 | tst_resm(TINFO, "Test block 4: PASSED"); |
| 287 | } |
| 288 | tst_resm(TINFO, "Exit block 4"); |
| 289 | |
| 290 | block5: |
| 291 | tst_resm(TINFO, "Enter block 5"); |
| 292 | fail = 0; |
| 293 | |
| 294 | /* |
| 295 | * Set a write lock in the middle of the file and do a |
| 296 | * unlock that overlaps the end |
| 297 | */ |
| 298 | if (do_lock(F_SETLK, (short)F_WRLCK, (short)0, 10, 5) < 0) { |
| 299 | tst_resm(TFAIL, "fcntl on file %s failed, errno =%d", |
| 300 | file, errno); |
| 301 | fail = 1; |
| 302 | } |
| 303 | |
| 304 | if (do_lock(F_SETLK, (short)F_UNLCK, (short)0, 13, 5) < 0) { |
| 305 | tst_resm(TFAIL, "fcntl on file %s failed, errno =%d", |
| 306 | file, errno); |
| 307 | fail = 1; |
| 308 | } |
| 309 | |
| 310 | /* |
| 311 | * Test the write lock |
| 312 | */ |
| 313 | do_test(&tl, (short)F_WRLCK, (short)0, 0, 0); |
| 314 | compare_lock(&tl, (short)F_WRLCK, (short)0, 10, 3, parent_pid); |
| 315 | |
| 316 | /* |
| 317 | * Test to make sure the rest of the file is unlocked |
| 318 | */ |
| 319 | do_test(&tl, (short)F_WRLCK, (short)0, 13, 0); |
| 320 | compare_lock(&tl, (short)F_UNLCK, (short)0, 13, 0, (short)0); |
| 321 | |
| 322 | /* |
| 323 | * remove all the locks set above |
| 324 | */ |
| 325 | unlock_file(); |
| 326 | |
| 327 | if (fail) { |
| 328 | tst_resm(TINFO, "Test block 5: FAILED"); |
| 329 | } else { |
| 330 | tst_resm(TINFO, "Test block 5: PASSED"); |
| 331 | } |
| 332 | tst_resm(TINFO, "Exit block 5"); |
| 333 | |
| 334 | block6: |
| 335 | tst_resm(TINFO, "Enter block 6"); |
| 336 | fail = 0; |
| 337 | |
| 338 | /* |
| 339 | * Set write lock in the middle of the file and do an unlock |
| 340 | * starting at the last byte of the write lock |
| 341 | */ |
| 342 | if (do_lock(F_SETLK, (short)F_WRLCK, (short)0, 10, 5) < 0) { |
| 343 | tst_resm(TFAIL, "fcntl on file %s failed, errno =%d", |
| 344 | file, errno); |
| 345 | fail = 1; |
| 346 | } |
| 347 | |
| 348 | if (do_lock(F_SETLK, (short)F_UNLCK, (short)0, 14, 5) < 0) { |
| 349 | tst_resm(TFAIL, "fcntl on file %s failed, errno =%d", |
| 350 | file, errno); |
| 351 | fail = 1; |
| 352 | } |
| 353 | |
| 354 | /* |
| 355 | * Test write lock |
| 356 | */ |
| 357 | do_test(&tl, (short)F_WRLCK, (short)0, 10, 0); |
| 358 | compare_lock(&tl, (short)F_WRLCK, (short)0, 10, 4, parent_pid); |
| 359 | |
| 360 | /* |
| 361 | * Test to make sure the end of the file is unlocked |
| 362 | */ |
| 363 | do_test(&tl, (short)F_WRLCK, (short)0, 14, 0); |
| 364 | compare_lock(&tl, (short)F_UNLCK, (short)0, 14, 0, (short)0); |
| 365 | |
| 366 | /* |
| 367 | * remove all the locks set above |
| 368 | */ |
| 369 | unlock_file(); |
| 370 | |
| 371 | if (fail) { |
| 372 | tst_resm(TINFO, "Test block 6: FAILED"); |
| 373 | } else { |
| 374 | tst_resm(TINFO, "Test block 6: PASSED"); |
| 375 | } |
| 376 | tst_resm(TINFO, "Exit block 6"); |
| 377 | |
| 378 | block7: |
| 379 | tst_resm(TINFO, "Enter block 7"); |
| 380 | fail = 0; |
| 381 | |
| 382 | /* |
| 383 | * Set a write lock at the middle of the file and do an |
| 384 | * unlock that starts at the byte past the end of the write |
| 385 | * lock |
| 386 | */ |
| 387 | if (do_lock(F_SETLK, (short)F_WRLCK, (short)0, 10, 5) < 0) { |
| 388 | tst_resm(TFAIL, "fcntl on file %s failed, errno =%d", |
| 389 | file, errno); |
| 390 | fail = 1; |
| 391 | } |
| 392 | |
| 393 | if (do_lock(F_SETLK, (short)F_UNLCK, (short)0, 16, 0) < 0) { |
| 394 | tst_resm(TFAIL, "fcntl on file %s failed, errno =%d", |
| 395 | file, errno); |
| 396 | fail = 1; |
| 397 | } |
| 398 | |
| 399 | /* |
| 400 | * Test the write lock |
| 401 | */ |
| 402 | do_test(&tl, (short)F_WRLCK, (short)0, 0, 0); |
| 403 | compare_lock(&tl, (short)F_WRLCK, (short)0, 10, 5, parent_pid); |
| 404 | |
| 405 | /* |
| 406 | * Test to make sure the rest of the file is unlocked |
| 407 | */ |
| 408 | do_test(&tl, (short)F_WRLCK, (short)0, 16, 0); |
| 409 | compare_lock(&tl, (short)F_UNLCK, (short)0, 16, 0, (short)0); |
| 410 | |
| 411 | /* |
| 412 | * remove all the locks set above |
| 413 | */ |
| 414 | unlock_file(); |
| 415 | |
| 416 | if (fail) { |
| 417 | tst_resm(TINFO, "Test block 7: FAILED"); |
| 418 | } else { |
| 419 | tst_resm(TINFO, "Test block 7: PASSED"); |
| 420 | } |
| 421 | |
| 422 | tst_resm(TINFO, "Exit block 7"); |
| 423 | |
| 424 | stop_child(); |
| 425 | close(fd); |
| 426 | } |
| 427 | cleanup(); |
| 428 | } |
| 429 | |
| 430 | /* |
| 431 | * setup |
| 432 | * performs all ONE TIME setup for this test |
| 433 | */ |
| 434 | void |
| 435 | setup() |
| 436 | { |
| 437 | char *buf = STRING; |
| 438 | |
| 439 | /* capture signals */ |
| 440 | tst_sig(FORK, DEF_HANDLER, cleanup); |
| 441 | |
| 442 | umask(0); |
| 443 | |
| 444 | /* Pause if that option was specified */ |
| 445 | TEST_PAUSE; |
| 446 | |
| 447 | pipe(parent_pipe); |
| 448 | pipe(child_pipe); |
| 449 | parent_pid = getpid(); |
| 450 | file = tempnam(".", NULL); |
| 451 | |
| 452 | if ((fd = open(file, O_RDWR|O_CREAT, 0777)) < 0) { |
| 453 | tst_resm(TFAIL, "Couldn't open %s! errno = %d", file, errno); |
| 454 | fail = 1; |
| 455 | } |
| 456 | |
| 457 | if (write(fd, buf, STRINGSIZE) < 0) { |
| 458 | tst_resm(TFAIL, "Couldn't write %s! errno = %d", file, errno); |
| 459 | fail = 1; |
| 460 | } |
| 461 | |
| 462 | if ((int)(signal(SIGCLD, catch_child)) < 0) { |
| 463 | tst_resm(TFAIL, "SIGCLD signal setup failed, errno: %d", |
| 464 | errno); |
| 465 | fail = 1; |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | /* |
| 470 | * cleanup() |
| 471 | * performs all ONE TIME cleanup for this test at completion or |
| 472 | * premature exit |
| 473 | */ |
| 474 | void |
| 475 | cleanup() |
| 476 | { |
| 477 | /* |
| 478 | * print timing stats if that option was specified |
| 479 | * print errno log if that option was specified |
| 480 | */ |
| 481 | TEST_CLEANUP; |
| 482 | |
| 483 | unlink(file); |
| 484 | |
| 485 | /* exit with return code appropriate for results */ |
| 486 | tst_exit(); |
| 487 | } |
| 488 | |
| 489 | do_child() |
| 490 | { |
| 491 | struct flock fl; |
| 492 | |
| 493 | close(parent_pipe[1]); |
| 494 | close(child_pipe[0]); |
| 495 | while(1) { |
| 496 | child_get(&fl); |
| 497 | if (fcntl(fd, F_GETLK, &fl) < 0) { |
| 498 | tst_resm(TFAIL, "fcntl on file %s failed, errno =%d", |
| 499 | file, errno); |
| 500 | fail = 1; |
| 501 | } |
| 502 | child_put(&fl); |
| 503 | } |
| 504 | } |
| 505 | |
| 506 | do_lock(int cmd, short type, short whence, int start, int len) |
| 507 | { |
| 508 | struct flock fl; |
| 509 | |
| 510 | fl.l_type = type; |
| 511 | fl.l_whence = whence; |
| 512 | fl.l_start = start; |
| 513 | fl.l_len = len; |
| 514 | return(fcntl(fd, cmd, &fl)); |
| 515 | } |
| 516 | |
| 517 | void |
| 518 | do_test(struct flock *fl, short type, short whence, int start, int len) |
| 519 | { |
| 520 | fl->l_type = type; |
| 521 | fl->l_whence = whence; |
| 522 | fl->l_start = start; |
| 523 | fl->l_len = len; |
| 524 | fl->l_pid = (short)0; |
| 525 | |
| 526 | parent_put(fl); |
| 527 | parent_get(fl); |
| 528 | } |
| 529 | |
| 530 | void |
| 531 | compare_lock(struct flock *fl, short type, short whence, int start, int len, |
| 532 | short pid) |
| 533 | { |
| 534 | if (fl->l_type != type) { |
| 535 | tst_resm(TFAIL, "lock type is wrong should be %s is %s", |
| 536 | str_type(type), str_type(fl->l_type)); |
| 537 | fail = 1; |
| 538 | } |
| 539 | |
| 540 | if (fl->l_whence != whence) { |
| 541 | tst_resm(TFAIL, "lock whence is wrong should be %d is %d", |
| 542 | whence, fl->l_whence); |
| 543 | fail = 1; |
| 544 | } |
| 545 | |
| 546 | if (fl->l_start != start) { |
| 547 | tst_resm(TFAIL, "region starts in wrong place, should be" |
| 548 | "%d is %d", start, fl->l_start); |
| 549 | fail = 1; |
| 550 | } |
| 551 | |
| 552 | if (fl->l_len != len) { |
| 553 | tst_resm(TFAIL, "region length is wrong, should be %d is %d", |
| 554 | len, fl->l_len); |
| 555 | fail = 1; |
| 556 | } |
| 557 | |
| 558 | if (fl->l_pid != pid) { |
| 559 | tst_resm(TFAIL, "locking pid is wrong, should be %d is %d", |
| 560 | pid, fl->l_pid); |
| 561 | fail = 1; |
| 562 | } |
| 563 | } |
| 564 | |
| 565 | void |
| 566 | unlock_file() |
| 567 | { |
| 568 | struct flock fl; |
| 569 | |
| 570 | if (do_lock(F_SETLK, (short)F_UNLCK, (short)0, 0, 0) < 0) { |
| 571 | tst_resm(TFAIL, "fcntl on file %s failed, errno =%d", file, |
| 572 | errno); |
| 573 | fail = 1; |
| 574 | } |
| 575 | do_test(&fl, F_WRLCK, 0, 0, 0); |
| 576 | compare_lock(&fl, (short)F_UNLCK, (short)0, 0, 0, (short)0); |
| 577 | } |
| 578 | |
| 579 | char * |
| 580 | str_type(int type) |
| 581 | { |
| 582 | static char buf[20]; |
| 583 | |
| 584 | switch (type) { |
| 585 | case 1: |
| 586 | return("F_RDLCK"); |
| 587 | case 2: |
| 588 | return("F_WRLCK"); |
| 589 | case 3: |
| 590 | return("F_UNLCK"); |
| 591 | default: |
| 592 | sprintf(buf, "BAD VALUE: %d", type); |
| 593 | return(buf); |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | void |
| 598 | parent_put(struct flock *l) |
| 599 | { |
| 600 | if (write(parent_pipe[1], l, sizeof(*l)) != sizeof(*l)) { |
| 601 | tst_resm(TFAIL, "couldn't send message to child"); |
| 602 | fail = 1; |
| 603 | } |
| 604 | } |
| 605 | |
| 606 | void |
| 607 | parent_get(struct flock *l) |
| 608 | { |
| 609 | if (read(child_pipe[0], l, sizeof(*l)) != sizeof(*l)) { |
| 610 | tst_resm(TFAIL, "couldn't get message from child"); |
| 611 | fail = 1; |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | void |
| 616 | child_put(struct flock *l) |
| 617 | { |
| 618 | if (write(child_pipe[1], l, sizeof(*l)) != sizeof(*l)) { |
| 619 | tst_resm(TFAIL, "couldn't send message to parent"); |
| 620 | fail = 1; |
| 621 | } |
| 622 | } |
| 623 | |
| 624 | void |
| 625 | child_get(struct flock *l) |
| 626 | { |
| 627 | if (read(parent_pipe[0], l, sizeof(*l)) != sizeof(*l)) { |
| 628 | tst_resm(TFAIL, "couldn't get message from parent"); |
| 629 | cleanup(); |
| 630 | } else if (l->l_type == (short)STOP) { |
| 631 | exit(0); |
| 632 | } |
| 633 | } |
| 634 | |
| 635 | void |
| 636 | stop_child() |
| 637 | { |
| 638 | struct flock fl; |
| 639 | |
| 640 | (void) signal(SIGCLD, (void (*)())SIG_DFL); |
| 641 | fl.l_type = STOP; |
| 642 | parent_put(&fl); |
| 643 | wait(0); |
| 644 | } |
| 645 | |
| 646 | void |
| 647 | catch_child() |
| 648 | { |
| 649 | tst_resm(TFAIL, "Unexpected death of child process"); |
| 650 | cleanup(); |
| 651 | } |