nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of version 2 of the GNU General Public License as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it would be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 11 | * |
| 12 | * You should have received a copy of the GNU General Public License along |
| 13 | * with this program; if not, write the Free Software Foundation, Inc., 59 |
| 14 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| 15 | * |
| 16 | */ |
| 17 | /********************************************************** |
| 18 | * |
| 19 | * TEST IDENTIFIER : clone02 |
| 20 | * |
| 21 | * EXECUTED BY : anyone |
| 22 | * |
| 23 | * TEST TITLE : Functionality tests for clone(2) |
| 24 | * |
| 25 | * TEST CASE TOTAL : 2 |
| 26 | * |
| 27 | * AUTHOR : Saji Kumar.V.R <saji.kumar@wipro.com> |
| 28 | * |
| 29 | * SIGNALS |
| 30 | * Uses SIGUSR1 to pause before test if option set. |
| 31 | * (See the parse_opts(3) man page). |
| 32 | * |
| 33 | * DESCRIPTION |
| 34 | * |
| 35 | * Setup: |
| 36 | * Setup signal handling. |
| 37 | * Pause for SIGUSR1 if option specified. |
| 38 | * generate a unique file name fore each test instance |
| 39 | * |
| 40 | * Test: |
| 41 | * Loop if the proper options are given. |
| 42 | * TEST1 |
| 43 | * ----- |
| 44 | * Call clone() with all resources shared. |
| 45 | * |
| 46 | * CHILD: |
| 47 | * modify the shared resources |
| 48 | * return 1 on success |
| 49 | * PARENT: |
| 50 | * wait for child to finish |
| 51 | * verify that the shared resourses are modified |
| 52 | * return 1 on success |
| 53 | * If parent & child returns successfully |
| 54 | * test passed |
| 55 | * else |
| 56 | * test failed |
| 57 | * |
| 58 | * TEST2 |
| 59 | * ----- |
| 60 | * Call clone() with no resources shared. |
| 61 | * |
| 62 | * CHILD: |
| 63 | * modify the resources in child's address space |
| 64 | * return 1 on success |
| 65 | * PARENT: |
| 66 | * wait for child to finish |
| 67 | * verify that the parent's resourses are not modified |
| 68 | * return 1 on success |
| 69 | * If parent & child returns successfully |
| 70 | * test passed |
| 71 | * else |
| 72 | * test failed |
| 73 | * Cleanup: |
| 74 | * Print errno log and/or timing stats if options given |
| 75 | * |
| 76 | * USAGE: <for command-line> |
| 77 | * clone02 [-c n] [-e] [-i n] [-I x] [-P x] [-t] [-h] [-f] [-p] |
| 78 | * where, -c n : Run n copies concurrently. |
| 79 | * -e : Turn on errno logging. |
| 80 | * -h : Show help screen |
| 81 | * -f : Turn off functional testing |
| 82 | * -i n : Execute test n times. |
| 83 | * -I x : Execute test for x seconds. |
| 84 | * -p : Pause for SIGUSR1 before starting |
| 85 | * -P x : Pause for x seconds between iterations. |
| 86 | * -t : Turn on syscall timing. |
| 87 | * |
mridge | fc9dd8c | 2004-05-11 21:37:01 +0000 | [diff] [blame] | 88 | * |
| 89 | * MODIFIED: - mridge@us.ibm.com -- changed getpid to syscall(get thread ID) for unique ID on NPTL threading |
| 90 | * |
| 91 | * |
nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 92 | ****************************************************************/ |
| 93 | |
robbiew | d34d581 | 2005-07-11 22:28:09 +0000 | [diff] [blame^] | 94 | #if defined UCLINUX && !__THROW |
| 95 | /* workaround for libc bug */ |
| 96 | #define __THROW |
| 97 | #endif |
| 98 | |
nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 99 | #include <errno.h> |
| 100 | #include <sched.h> |
| 101 | #include <fcntl.h> |
| 102 | #include <sys/wait.h> |
mridge | fc9dd8c | 2004-05-11 21:37:01 +0000 | [diff] [blame] | 103 | #include <sys/types.h> |
| 104 | #include <sys/syscall.h> |
| 105 | #include <linux/unistd.h> |
nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 106 | #include "test.h" |
| 107 | #include "usctest.h" |
| 108 | |
robbiew | b8bd30c | 2003-07-31 20:41:11 +0000 | [diff] [blame] | 109 | #define FLAG_ALL CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND | SIGCHLD |
nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 110 | #define FLAG_NONE SIGCHLD |
| 111 | #define PARENT_VALUE 1 |
| 112 | #define CHILD_VALUE 2 |
| 113 | #define TRUE 1 |
| 114 | #define FALSE 0 |
| 115 | |
nstraz | 882ee2d | 2003-07-16 17:40:32 +0000 | [diff] [blame] | 116 | #include "clone_platform.h" |
nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 117 | |
| 118 | static void setup(); |
| 119 | static int test_setup(); |
| 120 | static void cleanup(); |
| 121 | static void test_cleanup(); |
| 122 | static int child_fn(); |
| 123 | static int parent_test1(); |
| 124 | static int parent_test2(); |
| 125 | static int test_VM(); |
| 126 | static int test_FS(); |
| 127 | static int test_FILES(); |
| 128 | static int test_SIG(); |
| 129 | static int modified_VM(); |
| 130 | static int modified_FS(); |
| 131 | static int modified_FILES(); |
| 132 | static int modified_SIG(); |
| 133 | static void sig_child_defined_handler(); |
| 134 | static void sig_default_handler(); |
| 135 | |
| 136 | |
| 137 | static int fd_parent; |
| 138 | static char file_name[25]; |
| 139 | static int parent_variable; |
| 140 | static char cwd_parent[FILENAME_MAX]; |
| 141 | static int parent_got_signal, child_pid; |
| 142 | |
| 143 | char *TCID="clone02"; /* Test program identifier. */ |
| 144 | extern int Tst_count; /* Test Case counter for tst_* routines */ |
| 145 | |
| 146 | struct test_case_t { |
| 147 | int flags; |
| 148 | int (*parent_fn)(); |
| 149 | } test_cases[] = { |
| 150 | { FLAG_ALL, parent_test1}, |
| 151 | { FLAG_NONE, parent_test2} |
| 152 | }; |
| 153 | |
| 154 | int TST_TOTAL = sizeof(test_cases) / sizeof(test_cases[0]); |
| 155 | |
| 156 | |
mridge | fc9dd8c | 2004-05-11 21:37:01 +0000 | [diff] [blame] | 157 | |
nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 158 | int |
| 159 | main(int ac, char **av) |
| 160 | { |
| 161 | |
| 162 | int lc; /* loop counter */ |
| 163 | char *msg; /* message returned from parse_opts */ |
| 164 | void *child_stack; /* stack for child */ |
| 165 | int status, i; |
| 166 | |
| 167 | /* parse standard options */ |
| 168 | if ((msg=parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL) { |
| 169 | tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg); |
| 170 | } |
| 171 | |
| 172 | /* perform global setup for test */ |
| 173 | setup(); |
| 174 | |
| 175 | /* Allocate stack for child */ |
| 176 | if((child_stack = (void *) malloc(CHILD_STACK_SIZE)) == NULL) { |
| 177 | tst_brkm(TBROK, cleanup, "Cannot allocate stack for child"); |
| 178 | } |
| 179 | |
| 180 | /* check looping state if -c option given */ |
| 181 | for (lc=0; TEST_LOOPING(lc); lc++) { |
| 182 | |
| 183 | /* reset Tst_count in case we are looping. */ |
| 184 | Tst_count=0; |
| 185 | |
| 186 | for (i=0; i<TST_TOTAL; ++i) { |
| 187 | |
| 188 | /*Do test specific setup */ |
| 189 | if (!(test_setup())) { |
| 190 | tst_resm(TWARN, "test_setup() failed," |
| 191 | "skipping this test case"); |
| 192 | continue; |
| 193 | } |
| 194 | |
| 195 | /* Test the system call */ |
mridge | c23070c | 2005-01-05 20:52:41 +0000 | [diff] [blame] | 196 | #if defined(__hppa__) |
nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 197 | TEST(clone(child_fn, child_stack, |
| 198 | test_cases[i].flags, NULL)); |
nstraz | 882ee2d | 2003-07-16 17:40:32 +0000 | [diff] [blame] | 199 | #elif defined(__ia64__) |
| 200 | TEST(clone2(child_fn, child_stack, |
| 201 | CHILD_STACK_SIZE, test_cases[i].flags, NULL, |
| 202 | NULL, NULL, NULL)); |
nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 203 | #else |
| 204 | TEST(clone(child_fn, child_stack + CHILD_STACK_SIZE, |
| 205 | test_cases[i].flags, NULL)); |
| 206 | #endif |
| 207 | |
| 208 | /* check return code */ |
| 209 | if (TEST_RETURN == -1) { |
| 210 | tst_resm(TFAIL, "clone() Failed, errno = %d :" |
| 211 | " %s", TEST_ERRNO, |
| 212 | strerror(TEST_ERRNO)); |
| 213 | /* Cleanup & continue with next test case */ |
| 214 | test_cleanup(); |
| 215 | continue; |
| 216 | } |
| 217 | |
| 218 | /* Wait for child to finish */ |
| 219 | if ((wait(&status)) < 0) { |
| 220 | tst_resm(TWARN, "wait() failed, skipping this" |
| 221 | " test case"); |
| 222 | /* Cleanup & continue with next test case */ |
| 223 | test_cleanup(); |
| 224 | continue; |
| 225 | } |
robbiew | eed7cee | 2005-03-21 21:58:10 +0000 | [diff] [blame] | 226 | |
| 227 | if (WTERMSIG(status)) { |
| 228 | tst_resm(TWARN, "child exitied with signal %d", WTERMSIG(status)); |
| 229 | } |
nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 230 | |
| 231 | /* |
| 232 | * Check the return value from child function and |
| 233 | * parent function. If both functions returned |
| 234 | * successfully, test passed, else failed |
| 235 | */ |
| 236 | if ((WIFEXITED(status)) && (WEXITSTATUS(status)) && |
| 237 | (test_cases[i].parent_fn())) { |
| 238 | tst_resm(TPASS, "Test Passed"); |
| 239 | } else { |
| 240 | tst_resm(TFAIL, "Test Failed"); |
| 241 | } |
| 242 | |
| 243 | /* Do test specific cleanup */ |
| 244 | test_cleanup(); |
| 245 | } |
| 246 | } /* End for TEST_LOOPING */ |
| 247 | |
| 248 | free(child_stack); |
robbiew | b8bd30c | 2003-07-31 20:41:11 +0000 | [diff] [blame] | 249 | |
nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 250 | /* cleanup and exit */ |
| 251 | cleanup(); |
| 252 | |
| 253 | /*NOTREACHED*/ |
| 254 | return 0; |
| 255 | |
| 256 | } /* End main */ |
| 257 | |
| 258 | /* setup() - performs all ONE TIME setup for this test */ |
| 259 | void |
| 260 | setup() |
| 261 | { |
| 262 | |
| 263 | /* capture signals */ |
| 264 | tst_sig(FORK, DEF_HANDLER, cleanup); |
| 265 | |
| 266 | /* Pause if that option was specified */ |
| 267 | TEST_PAUSE; |
| 268 | |
| 269 | /* Create temporary directory and 'cd' to it. */ |
| 270 | tst_tmpdir(); |
| 271 | |
| 272 | /* Get unique file name for each child process */ |
mridge | fc9dd8c | 2004-05-11 21:37:01 +0000 | [diff] [blame] | 273 | if ((sprintf(file_name, "parent_file_%ld", syscall(__NR_gettid))) <= 0 ) { |
nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 274 | tst_brkm(TBROK, cleanup, "sprintf() failed"); |
| 275 | } |
| 276 | |
| 277 | } /* End setup() */ |
| 278 | |
| 279 | |
| 280 | /* |
| 281 | *cleanup() - performs all ONE TIME cleanup for this test at |
| 282 | * completion or premature exit. |
| 283 | */ |
| 284 | void |
| 285 | cleanup() |
| 286 | { |
| 287 | |
| 288 | /* |
| 289 | * print timing stats if that option was specified. |
| 290 | * print errno log if that option was specified. |
| 291 | */ |
| 292 | TEST_CLEANUP; |
| 293 | |
| 294 | /* Remove temperory file */ |
| 295 | if ((unlink(file_name)) == -1 ) { |
| 296 | tst_resm(TWARN, "Couldn't delete file, %s", file_name); |
| 297 | } |
robbiew | b8bd30c | 2003-07-31 20:41:11 +0000 | [diff] [blame] | 298 | chdir("/tmp"); |
| 299 | remove(cwd_parent); |
| 300 | |
nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 301 | /* exit with return code appropriate for results */ |
| 302 | tst_exit(); |
| 303 | } /* End cleanup() */ |
| 304 | |
| 305 | /* |
| 306 | * test_setup() - test specific setup function |
| 307 | */ |
| 308 | int |
| 309 | test_setup() |
| 310 | { |
| 311 | |
| 312 | struct sigaction def_act; |
| 313 | |
| 314 | /* Save current working directory of parent */ |
| 315 | if ((getcwd(cwd_parent, sizeof(cwd_parent))) == NULL) { |
| 316 | tst_resm(TWARN, "getcwd() failed in test_setup()"); |
| 317 | return 0; |
| 318 | } |
| 319 | |
| 320 | /* |
| 321 | * Set value for parent_variable in parent, which will be |
| 322 | * changed by child in test_VM(), for testing CLONE_VM flag |
| 323 | */ |
| 324 | parent_variable = PARENT_VALUE; |
| 325 | |
| 326 | /* |
| 327 | * Open file from parent, which will be closed by |
| 328 | * child in test_FILES(), used for testing CLONE_FILES flag |
| 329 | */ |
| 330 | if ((fd_parent = open(file_name, O_CREAT | O_RDWR)) == -1) { |
| 331 | tst_resm(TWARN, "open() failed in test_setup()"); |
| 332 | return 0; |
| 333 | } |
| 334 | |
| 335 | /* |
| 336 | * set parent_got_signal to FALSE, used for testing |
| 337 | * CLONE_SIGHAND flag |
| 338 | */ |
| 339 | parent_got_signal = FALSE; |
| 340 | |
| 341 | /* Setup signal handler for SIGUSR2 */ |
| 342 | def_act.sa_handler = sig_default_handler; |
| 343 | def_act.sa_flags = SA_RESTART; |
| 344 | |
| 345 | if ((sigaction(SIGUSR2, &def_act, NULL)) == -1) { |
| 346 | tst_resm(TWARN, "sigaction() failed in test_setup()\n"); |
| 347 | return 0; |
| 348 | } |
| 349 | |
| 350 | /* test_setup() returns success*/ |
| 351 | return 1; |
| 352 | } |
| 353 | |
| 354 | /* |
| 355 | * test_cleanup() - test specific cleanup function |
| 356 | */ |
| 357 | void |
| 358 | test_cleanup() |
| 359 | { |
| 360 | |
| 361 | /* Restore parent's working directory */ |
| 362 | if ((chdir(cwd_parent)) == -1) { |
| 363 | /* we have to exit here */ |
| 364 | tst_brkm(TBROK, cleanup, "chdir() failed in test_cleanup()"); |
| 365 | } |
| 366 | |
| 367 | } |
| 368 | |
| 369 | /* |
| 370 | * child_fn() - child function |
| 371 | */ |
| 372 | int |
| 373 | child_fn() |
| 374 | { |
| 375 | |
| 376 | /* save child pid */ |
mridge | fc9dd8c | 2004-05-11 21:37:01 +0000 | [diff] [blame] | 377 | child_pid = syscall(__NR_gettid); |
| 378 | |
| 379 | /*child_pid = getpid(); changed to above to work on POSIX threads -- NPTL */ |
nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 380 | |
| 381 | if (test_VM() && test_FILES() && test_FS() && test_SIG()) { |
robbiew | b8bd30c | 2003-07-31 20:41:11 +0000 | [diff] [blame] | 382 | exit(1); |
nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 383 | } |
robbiew | b8bd30c | 2003-07-31 20:41:11 +0000 | [diff] [blame] | 384 | exit(0); |
nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 385 | } |
| 386 | |
| 387 | /* |
| 388 | * parent_test1() - parent function for test1 |
| 389 | */ |
| 390 | int |
| 391 | parent_test1() |
| 392 | { |
| 393 | |
| 394 | /* |
| 395 | * For first test case (with all flags set), all resources are |
| 396 | * shared between parent and child. So whatever changes made by |
| 397 | * child should get reflected in parent also. modified_*() |
| 398 | * functions check this. All of them should return 1 for |
| 399 | * parent_test1() to return 1 |
| 400 | */ |
| 401 | |
| 402 | if(modified_VM() && modified_FILES() && modified_FS() && |
| 403 | modified_SIG()) { |
| 404 | return 1; |
| 405 | } |
| 406 | return 0; |
| 407 | } |
| 408 | |
| 409 | /* |
| 410 | * parent_test2 - parent function for test 2 |
| 411 | */ |
| 412 | int |
| 413 | parent_test2() |
| 414 | { |
| 415 | |
| 416 | /* |
| 417 | * For second test case (with no resouce shared), all of the |
| 418 | * modified_*() functions should return 0 for parent_test2() |
| 419 | * to return 1 |
| 420 | */ |
| 421 | |
| 422 | if ( modified_VM() || modified_FILES() || modified_FS() || |
| 423 | modified_SIG()) { |
| 424 | return 0; |
| 425 | } |
| 426 | return 1; |
| 427 | } |
| 428 | |
| 429 | /* |
| 430 | * test_VM() - function to change parent_variable from child's |
| 431 | * address space. If CLONE_VM flag is set, child shares |
| 432 | * the memory space with parent so this will be visible |
| 433 | * to parent also. |
| 434 | */ |
| 435 | |
| 436 | int |
| 437 | test_VM() |
| 438 | { |
| 439 | parent_variable = CHILD_VALUE; |
| 440 | return 1; |
| 441 | } |
| 442 | |
| 443 | /* |
| 444 | * test_FILES() - This function closes a file descriptor opened by |
| 445 | * parent. If CLONE_FILES flag is set, the parent and |
| 446 | * the child process share the same file descriptor |
| 447 | * table. so this affects the parent also |
| 448 | */ |
| 449 | int |
| 450 | test_FILES() |
| 451 | { |
| 452 | if ((close(fd_parent)) == -1) { |
| 453 | tst_resm(TWARN, "close() failed in test_FILES()"); |
| 454 | return 0; |
| 455 | } |
| 456 | return 1; |
| 457 | } |
| 458 | |
| 459 | /* |
| 460 | * test_FS() - This function changes the current working directory |
| 461 | * of the child process. If CLONE_FS flag is set, this |
| 462 | * will be visible to parent also. |
| 463 | */ |
| 464 | int |
| 465 | test_FS() |
| 466 | { |
| 467 | if((chdir("/tmp")) == -1) { |
| 468 | tst_resm(TWARN, "chdir() failed in test_FS()"); |
| 469 | return 0; |
| 470 | } |
| 471 | return 1; |
| 472 | } |
| 473 | |
| 474 | /* |
| 475 | * test_SIG() - This function changes the signal handler for SIGUSR2 |
| 476 | * signal for child. If CLONE_SIGHAND flag is set, this |
| 477 | * affects parent also. |
| 478 | */ |
| 479 | int |
| 480 | test_SIG() |
| 481 | { |
| 482 | |
| 483 | struct sigaction new_act; |
| 484 | |
| 485 | new_act.sa_handler = sig_child_defined_handler; |
| 486 | new_act.sa_flags = SA_RESTART; |
| 487 | |
| 488 | /* Set signal handler to sig_child_defined_handler */ |
| 489 | if ((sigaction(SIGUSR2, &new_act, NULL)) == -1) { |
| 490 | tst_resm(TWARN, "signal() failed in test_SIG()"); |
| 491 | return 0; |
| 492 | } |
| 493 | |
| 494 | /* Send SIGUSR2 signal to parent */ |
| 495 | if ((kill(getppid(), SIGUSR2)) == -1) { |
| 496 | tst_resm(TWARN, "kill() failed in test_SIG()"); |
| 497 | return 0; |
| 498 | } |
| 499 | return 1; |
| 500 | } |
| 501 | |
| 502 | /* |
| 503 | * modified_VM() - This function is called by parent process to check |
| 504 | * whether child's modification to parent_variable |
| 505 | * is visible to parent |
| 506 | */ |
| 507 | |
| 508 | int |
| 509 | modified_VM() |
| 510 | { |
| 511 | |
| 512 | if (parent_variable == CHILD_VALUE) { |
| 513 | /* child has modified parent_variable */ |
| 514 | return 1; |
| 515 | } |
| 516 | return 0; |
| 517 | } |
| 518 | |
| 519 | /* |
| 520 | * modified_FILES() - This function checks for file descriptor table |
| 521 | * modifications done by child |
| 522 | */ |
| 523 | int |
| 524 | modified_FILES() |
| 525 | { |
| 526 | char buff[20]; |
| 527 | |
| 528 | if (((read(fd_parent, buff, sizeof(buff))) == -1) && |
| 529 | (errno == EBADF)) { |
| 530 | /* Child has closed this file descriptor */ |
| 531 | return 1; |
| 532 | } |
| 533 | |
| 534 | /* close fd_parent*/ |
| 535 | if ((close(fd_parent)) == -1) { |
| 536 | tst_resm(TWARN, "close() failed in modified_FILES()"); |
| 537 | } |
| 538 | |
| 539 | return 0; |
| 540 | } |
| 541 | |
| 542 | /* |
| 543 | * modified_FS() - This function checks parent's current working directory |
| 544 | * to see whether its modified by child or not. |
| 545 | */ |
| 546 | int |
| 547 | modified_FS() |
| 548 | { |
| 549 | char cwd[FILENAME_MAX]; |
| 550 | |
| 551 | if ((getcwd(cwd, sizeof(cwd))) == NULL) { |
| 552 | tst_resm(TWARN, "getcwd() failed \n"); |
| 553 | } |
| 554 | |
| 555 | if ( !(strcmp(cwd, cwd_parent) )) { |
| 556 | /* cwd hasn't changed */ |
| 557 | return 0; |
| 558 | } |
| 559 | return 1; |
| 560 | } |
| 561 | |
| 562 | /* |
| 563 | * modified_SIG() - This function checks whether child has changed |
| 564 | * parent's signal handler for signal, SIGUSR2 |
| 565 | */ |
| 566 | int |
| 567 | modified_SIG() |
| 568 | { |
| 569 | |
| 570 | if (parent_got_signal) { |
| 571 | /* |
| 572 | * parent came through sig_child_defined_handler() |
| 573 | * this means child has changed parent's handler |
| 574 | */ |
| 575 | return 1; |
| 576 | } |
| 577 | return 0; |
| 578 | } |
| 579 | |
| 580 | /* |
| 581 | * sig_child_defined_handler() - Signal handler installed by child |
| 582 | */ |
| 583 | void |
| 584 | sig_child_defined_handler(int pid) |
| 585 | { |
mridge | fc9dd8c | 2004-05-11 21:37:01 +0000 | [diff] [blame] | 586 | if((syscall(__NR_gettid)) == child_pid) { |
nstraz | e321981 | 2003-07-14 17:06:37 +0000 | [diff] [blame] | 587 | /* Child got signal, give warning */ |
| 588 | tst_resm(TWARN, "Child got SIGUSR2 signal"); |
| 589 | } else { |
| 590 | parent_got_signal = TRUE; |
| 591 | } |
| 592 | } |
| 593 | |
| 594 | /* sig_default_handler() - Default handler for parent */ |
| 595 | void |
| 596 | sig_default_handler() |
| 597 | { |
| 598 | } |