| /* |
| * 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 clock_settime() does not affect clock_nanosleep() |
| * relative timers expiration times. |
| * |
| * Steps: |
| * - get time T0 |
| * - in child: set clock_nanosleep() to sleep for SLEEPSEC seconds |
| * - in parent: sleep SMALLTIME (< SLEEPSEC) |
| * - in parent: set time back to T0 |
| * - in child: ensure time when clock_nanosleep() expires is within |
| * ACCEPTABLEDELTA of T0+(SLEEPSEC-SMALLTIME) |
| */ |
| #include <stdio.h> |
| #include <time.h> |
| #include <signal.h> |
| #include <unistd.h> |
| #include <sys/wait.h> |
| #include "posixtest.h" |
| #include "helpers.h" |
| |
| #define SLEEPSEC 5 |
| #define SMALLTIME 2 |
| #define ACCEPTABLEDELTA 1 |
| |
| #define CHILDPASS 1 |
| #define CHILDFAIL 0 |
| |
| int main(int argc, char *argv[]) |
| { |
| struct timespec tsT0, tssleep; |
| 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 */ |
| struct timespec tsend; |
| int expectedsec; |
| |
| tssleep.tv_sec = SLEEPSEC; |
| tssleep.tv_nsec = 0; |
| |
| if (clock_nanosleep(CLOCK_REALTIME, 0, &tssleep, NULL) != 0) { |
| printf("clock_nanosleep() did not return success\n"); |
| return CHILDFAIL; |
| } |
| |
| if (clock_gettime(CLOCK_REALTIME, &tsend) != 0) { |
| perror("clock_gettime() did not return success\n"); |
| return CHILDFAIL; |
| } |
| |
| expectedsec = tsT0.tv_sec + (SLEEPSEC-SMALLTIME); |
| |
| if (tsend.tv_sec >= expectedsec) { |
| if ((tsend.tv_sec-expectedsec) <= ACCEPTABLEDELTA) { |
| return CHILDPASS; |
| } else { |
| printf("Ended too late. %d >> %d\n", |
| (int) tsend.tv_sec, |
| (int) expectedsec); |
| return CHILDFAIL; |
| } |
| } else { |
| printf("Did not sleep for long enough %d < %d\n", |
| (int) tsend.tv_sec, (int) expectedsec); |
| 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; |
| } |