/*
 *
 *   Copyright (c) International Business Machines  Corp., 2001
 *
 *   This program is free software;  you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program;  if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

/*
 * Test Name: nanosleep04
 *
 * Test Description:
 *  Verify that nanosleep() will fail to suspend the execution
 *  of a process if the specified pause time is invalid.
 *
 * Expected Result:
 *  nanosleep() should return with -1 value and sets errno to EINVAL.
 *
 * Algorithm:
 *  Setup:
 *   Setup signal handling.
 *   Pause for SIGUSR1 if option specified.
 *
 *  Test:
 *   Loop if the proper options are given.
 *   Execute system call
 *   Check return code, if system call failed (return=-1)
 *   	if errno set == expected errno
 *   		Issue sys call fails with expected return value and errno.
 *   	Otherwise,
 *		Issue sys call fails with unexpected errno.
 *   Otherwise,
 *	Issue sys call returns unexpected value.
 *
 *  Cleanup:
 *   Print errno log and/or timing stats if options given
 *
 * Usage:  <for command-line>
 *  nanosleep04 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
 *     where,  -c n : Run n copies concurrently.
 *             -e   : Turn on errno logging.
 *	       -i n : Execute test n times.
 *	       -I x : Execute test for x seconds.
 *	       -P x : Pause for x seconds between iterations.
 *	       -t   : Turn on syscall timing.
 *
 * HISTORY
 *	07/2001 Ported by Wayne Boyer
 *
 * RESTRICTIONS:
 *  None.
 */
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <wait.h>
#include <time.h>

#include "test.h"
#include "usctest.h"

char *TCID="nanosleep04";	/* Test program identifier.    */
int TST_TOTAL=1;		/* Total number of test cases. */
extern int Tst_count;		/* Test Case counter for tst_* routines */

struct timespec timereq;	/* time struct. buffer for nanosleep() */

int exp_enos[]={EINVAL, 0};

void setup();			/* Main setup function of test */
void cleanup();			/* cleanup function for the test */

int
main(int ac, char **av)
{
	int lc;			/* loop counter */
	char *msg;		/* message returned from parse_opts */
	pid_t cpid;		/* Child process id */
	int status;		/* child exit status */
    
	/* Parse standard options given to run the test. */
	msg = parse_opts(ac, av, (option_t *)NULL, NULL);
	if (msg != (char *)NULL) {
		tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg);
	}

	/* Perform global setup for test */
	setup();

	/* set the expected errnos... */
	TEST_EXP_ENOS(exp_enos);

	/* Check looping state if -i option given */
	for (lc = 0; TEST_LOOPING(lc); lc++) {

		/* Reset Tst_count in case we are looping. */
		Tst_count=0;

		/*
		 * Creat a child process and suspend its
		 * execution using nanosleep()
		 */
		if ((cpid = fork()) == -1) {
			tst_brkm(TBROK, cleanup,
				 "fork() fails to create child process");
		}

		if (cpid == 0) {		/* Child process */
			/* 
			 * Call nanosleep() to suspend child process
			 * for specified time 'tv_sec'.
			 */
			TEST(nanosleep(&timereq, NULL));

			/* check return code of nanosleep() */
			if (TEST_RETURN == -1) {

				TEST_ERROR_LOG(TEST_ERRNO);

				/* Check for expected errno is set */
				if (TEST_ERRNO != EINVAL) {
					tst_resm(TFAIL, "nanosleep() failed, "
						 "errno:%d, expected:%d",
						 TEST_ERRNO, EINVAL);
					exit(1);
				}
			} else {
				tst_resm(TFAIL, "nanosleep() returns %d, "
					 "expected -1, errno:%d",
					 TEST_RETURN, EINVAL);
				exit(1);
			}

			/* Everything is fine, exit normally */
			exit(0);
		}

		/* Wait for child to execute */
		wait(&status);
		if (WEXITSTATUS(status) == 0) {
			tst_resm(TPASS, "nanosleep() fails, invalid pause "
				 "time, error:%d", EINVAL);
		} else if (WEXITSTATUS(status) == 1) {
			tst_resm(TFAIL, "child process exited abnormally");
		}
	}	/* End for TEST_LOOPING */

	/* Call cleanup() to undo setup done for the test. */
	cleanup();

	/*NOTREACHED*/
	return(0);
}	/* End main */

/*
 * setup() - performs all ONE TIME setup for this test.
 *  Initialise time structure elements, such that pause time 
 *  points to -ve value.
 */
void 
setup()
{
	/* capture signals */
	tst_sig(FORK, DEF_HANDLER, cleanup);

	/* Pause if that option was specified */
	TEST_PAUSE;

	/* Initialise time variables which used to suspend child execution */
	timereq.tv_sec = -5;
	timereq.tv_nsec = 9999;

}

/*
 * cleanup() - performs all ONE TIME cleanup for this test at
 *             completion or premature exit.
 */
void 
cleanup()
{
	/*
	 * print timing stats if that option was specified.
	 * print errno log if that option was specified.
	 */
	TEST_CLEANUP;

	/* exit with return code appropriate for results */
	tst_exit();
}