| /* |
| * Copyright (c) 2002, Intel Corporation. All rights reserved. |
| * Created by: julie.n.fleischer REMOVE-THIS AT intel DOT com |
| * This file is licensed under the GPL license. For the full content |
| * of this license, see the COPYING file at the top level of this |
| * source tree. |
| * |
| * Test that if clock_settime() changes the time for CLOCK_REALTIME, |
| * then any threads blocked on clock_nanosleep() for the CLOCK_REALTIME |
| * clock will use the new time for expiration. |
| * |
| * Steps: |
| * - get time T0 |
| * - in child: set clock_nanosleep() to sleep until time |
| * T1 = T0 + SLEEPOFFSET |
| * - in parent: sleep SMALLTIME (< SLEEPOFFSET) |
| * - in parent: set time back to T0 |
| * - in child: ensure time when clock_nanosleep() expires is within |
| * ACCEPTABLEDELTA of T1 |
| */ |
| #include <stdio.h> |
| #include <time.h> |
| #include <signal.h> |
| #include <unistd.h> |
| #include <sys/wait.h> |
| #include "posixtest.h" |
| #include "helpers.h" |
| |
| #define SLEEPOFFSET 5 |
| #define SMALLTIME 2 |
| #define ACCEPTABLEDELTA 1 |
| |
| #define CHILDPASS 1 |
| #define CHILDFAIL 0 |
| |
| int main(int argc, char *argv[]) |
| { |
| struct timespec tsT0, tsT1; |
| int pid; |
| |
| /* Check that we're root...can't call clock_settime with CLOCK_REALTIME otherwise */ |
| if (getuid() != 0) |
| { |
| printf("Run this test as ROOT, not as a Regular User\n"); |
| return PTS_UNTESTED; |
| } |
| |
| if (clock_gettime(CLOCK_REALTIME, &tsT0) != 0) { |
| perror("clock_gettime() did not return success\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| if ((pid = fork()) == 0) { |
| /* child here */ |
| int flags = 0; |
| struct timespec tsT2; |
| |
| tsT1.tv_sec=tsT0.tv_sec + SLEEPOFFSET; |
| tsT1.tv_nsec=tsT0.tv_nsec; |
| |
| flags |= TIMER_ABSTIME; |
| if (clock_nanosleep(CLOCK_REALTIME, flags, &tsT1, NULL) != 0) { |
| printf("clock_nanosleep() did not return success\n"); |
| return CHILDFAIL; |
| } |
| |
| if (clock_gettime(CLOCK_REALTIME, &tsT2) != 0) { |
| perror("clock_gettime() did not return success\n"); |
| return CHILDFAIL; |
| } |
| |
| if (tsT2.tv_sec >= tsT1.tv_sec) { |
| if ((tsT2.tv_sec-tsT1.tv_sec) <= ACCEPTABLEDELTA) { |
| return CHILDPASS; |
| } else { |
| printf("Ended too late. %d >> %d\n", |
| (int) tsT2.tv_sec, |
| (int) tsT1.tv_sec); |
| return CHILDFAIL; |
| } |
| } else { |
| printf("Did not sleep for long enough %d < %d\n", |
| (int) tsT2.tv_sec, (int) tsT1.tv_sec); |
| return CHILDFAIL; |
| } |
| |
| return CHILDFAIL; |
| } else { |
| /* parent here */ |
| int i; |
| struct timespec tsreset; |
| |
| sleep(SMALLTIME); |
| |
| if (clock_settime(CLOCK_REALTIME, &tsT0) != 0) { |
| printf("clock_settime() did not return success\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| if (wait(&i) == -1) { |
| perror("Error waiting for child to exit\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| getBeforeTime(&tsreset); // get current time |
| tsreset.tv_sec += SMALLTIME; |
| setBackTime(tsreset); |
| if (WIFEXITED(i) && WEXITSTATUS(i)) { |
| printf("Test PASSED\n"); |
| return PTS_PASS; |
| } else { |
| printf("Test FAILED\n"); |
| return PTS_FAIL; |
| } |
| } |
| |
| return PTS_UNRESOLVED; |
| } |