testcases/open_posix_testsuite/conformance/interfaces/fork/9-1.c

/*
* Copyright (c) 2004, Bull S.A..  All rights reserved.
* Created by: Sebastien Decugis

* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

* This sample test aims to check the following assertion:
*
* The time left until an alarm clock is triggered is reset to zero,
* and the alarm, if any, is canceled

* The steps are:
* -> Trig an alarm
* -> fork
* -> Check the alarm is not running in the child process.
* -> join the child

* The test fails if the child has a pending alarm.

*/

/* We are testing conformance to IEEE Std 1003.1, 2003 Edition */
#define _POSIX_C_SOURCE 200112L

#include <pthread.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <sys/wait.h>
#include <errno.h>

#include "../testfrmw/testfrmw.h"
#include "../testfrmw/testfrmw.c"

#ifndef VERBOSE
#define VERBOSE 1
#endif

int main(void)
{
	int ret, status;
	pid_t child, ctl;

	output_init();

	alarm(10);

	ret = alarm(10);

	if (ret == 0) {
		FAILED("the alarm() routine does not behave as expected");
	}

	/* Create the child */
	child = fork();

	if (child == -1) {
		UNRESOLVED(errno, "Failed to fork");
	}

	/* child */
	if (child == 0) {

		ret = alarm(10);

		if (ret != 0) {
			FAILED("The child alarm pending was not reset.");
		}

		/* We're done */
		exit(PTS_PASS);
	}

	/* Parent joins the child */
	ctl = waitpid(child, &status, 0);

	if (ctl != child) {
		UNRESOLVED(errno, "Waitpid returned the wrong PID");
	}

	if (!WIFEXITED(status) || (WEXITSTATUS(status) != PTS_PASS)) {
		FAILED("Child exited abnormally");
	}

	alarm(0);

#if VERBOSE > 0
	output("Test passed\n");
#endif

	PASSED;
}