testcases/open_posix_testsuite/conformance/interfaces/fork/22-1.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., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.

* This sample test aims to check the following assertion:
*
* The CPU-time clock of the new process/ new process's thread is initialized to 0.

* The steps are:
* -> compute until the parent process CPU-time clock is greater than 1 sec.
* -> fork
* -> check the child process process CPU time and thread CPU time clocks.

* The test fails if any of these clocks are > 1sec.

*/

/********************************************************************************************/
/****************************** standard includes *****************************************/
/********************************************************************************************/
#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 <time.h>
/********************************************************************************************/
/******************************   Test framework   *****************************************/
/********************************************************************************************/
#include "../testfrmw/testfrmw.h"
 #include "../testfrmw/testfrmw.c"
/* This header is responsible for defining the following macros:
 * UNRESOLVED(ret, descr);
 *    where descr is a description of the error and ret is an int (error code for example)
 * FAILED(descr);
 *    where descr is a short text saying why the test has failed.
 * PASSED();
 *    No parameter.
 *
 * Both three macros shall terminate the calling process.
 * The testcase shall not terminate in any other maneer.
 *
 * The other file defines the functions
 * void output_init()
 * void output(char * string, ...)
 *
 * Those may be used to output information.
 */

/********************************************************************************************/
/********************************** Configuration ******************************************/
/********************************************************************************************/
#ifndef VERBOSE
#define VERBOSE 1
#endif

/********************************************************************************************/
/***********************************    Test case   *****************************************/
/********************************************************************************************/

/* The main test function. */
int main(int argc, char * argv[])
{
	int ret, status;
	pid_t child, ctl;

	long ctp, ctt;
	clockid_t clp, clt;

	struct timespec tp;

	/* Initialize output */
	output_init();

	ctp = sysconf(_SC_CPUTIME);
	ctt = sysconf(_SC_THREAD_CPUTIME);

	if ((ctp == -1) && (ctt == -1))
	{
		UNTESTED("The testcase needs CPUTIME or THREAD_CPUTIME support");
	}

#if VERBOSE > 0
	output("System abilities:\n");

	output("  _POSIX_CPUTIME        : %ld\n", ctp);

	output("  _POSIX_THREAD_CPUTIME : %ld\n", ctt);

#endif
	if (ctp > 0)
	{
		ret = clock_getcpuclockid(0, &clp);

		if (ret != 0)
		{
			UNRESOLVED(ret, "Unable to get cpu-time clock id of the process");
		}

		do
		{
			ret = clock_gettime(clp, &tp);

			if (ret != 0)
			{
				UNRESOLVED(errno, "Failed to read CPU time clock");
			}
		}
		while (tp.tv_sec < 1);
	}

	if (ctt > 0)
	{
		ret = pthread_getcpuclockid(pthread_self(), &clt);

		if (ret != 0)
		{
			UNRESOLVED(ret, "Unable to get cpu-time clock id of the thread");
		}

		do
		{
			ret = clock_gettime(clt, &tp);

			if (ret != 0)
			{
				UNRESOLVED(errno, "Failed to read thread CPU time clock");
			}
		}
		while (tp.tv_sec < 1);
	}

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

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

	/* child */
	if (child == 0)
	{
		if (ctp > 0)
		{
			ret = clock_getcpuclockid(0, &clp);

			if (ret != 0)
			{
				UNRESOLVED(ret, "Unable to get cpu-time clock id of the process");
			}

			ret = clock_gettime(clp, &tp);

			if (ret != 0)
			{
				UNRESOLVED(errno, "Failed to read CPU time clock");
			}

			if (tp.tv_sec > 0)
			{
				FAILED("The process CPU-time clock was not reset in child\n");
			}
		}

		if (ctt > 0)
		{
			ret = pthread_getcpuclockid(pthread_self(), &clt);

			if (ret != 0)
			{
				UNRESOLVED(ret, "Unable to get cpu-time clock id of the thread");
			}

			ret = clock_gettime(clt, &tp);

			if (ret != 0)
			{
				UNRESOLVED(errno, "Failed to read thread CPU time clock");
			}

			if (tp.tv_sec > 0)
			{
				FAILED("The thread CPU-time clock was not reset in child\n");
			}
		}

		/* 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");
	}

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

#endif
	PASSED;
}