testcases/open_posix_testsuite/conformance/interfaces/clock_nanosleep/1-3.c

/*
 * 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_nanosleep() causes the current thread to be suspended
 * until a signal whose action is to invoke a signal handling function
 * is received.
 *
 * Note:  This test case has some limitations:
 * - clock_nanosleep() could not be executed at all, and the test would
 *   pass [Hopefully, the sleep() in the parent ensures clock_nanosleep()
 *   will be executed.]
 * - There is no way of knowing for sure that it was the signal that
 *   stopped clock_nanosleep().
 */
#include <stdio.h>
#include <time.h>
#include <signal.h>
#include <unistd.h>
#include <sys/wait.h>
#include "posixtest.h"

#define SLEEPSEC 30

void handler(int signo)
{
	printf("In handler\n");
}

int main(int argc, char *argv[])
{
	struct timespec tssleep, tsbefore, tsafter;
	int pid;
	struct sigaction act;

	if (clock_gettime(CLOCK_REALTIME, &tsbefore) != 0) {
		perror("clock_gettime() did not return success\n");
		return PTS_UNRESOLVED;
	}

	if ((pid = fork()) == 0) {
		/* child here */

		act.sa_handler=handler;
		act.sa_flags=0;
		if (sigemptyset(&act.sa_mask) != 0) {
			perror("sigemptyset() did not return success\n");
			return PTS_UNRESOLVED;
		}
		if (sigaction(SIGABRT, &act, 0) != 0) {
			perror("sigaction() did not return success\n");
			return PTS_UNRESOLVED;
		}
		tssleep.tv_sec=SLEEPSEC;
		tssleep.tv_nsec=0;
		clock_nanosleep(CLOCK_REALTIME, 0, &tssleep, NULL);
	} else {
		/* parent here */
		int i;

		sleep(1);

		if (kill(pid, SIGABRT) != 0) {
			printf("Could not raise signal being tested\n");
			return PTS_UNRESOLVED;
		}

		if (wait(&i) == -1) {
			perror("Error waiting for child to exit\n");
			return PTS_UNRESOLVED;
		}
		if (clock_gettime(CLOCK_REALTIME, &tsafter) != 0) {
			perror("clock_gettime() did not return success\n");
			return PTS_UNRESOLVED;
		}

		/*
		 * pass if we slept for less than the (large) sleep time
		 * allotted
		 */
		if ((tsafter.tv_sec-tsbefore.tv_sec) < SLEEPSEC) {
			printf("Test PASSED\n");
			return PTS_PASS;
		} else {
			printf("Slept for too long: %d >= %d\n",
				(int)tsafter.tv_sec-(int)tsbefore.tv_sec,
				SLEEPSEC);
			printf("Test FAILED\n");
			return PTS_FAIL;
		}
	}

	return PTS_UNRESOLVED;
}