testcases/kernel/syscalls/prctl/prctl01.c

/*
 * Copyright (c) Wipro Technologies Ltd, 2002.  All Rights Reserved.
 *
 * 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.
 *
 */
/**********************************************************
 *
 *    TEST IDENTIFIER	: prctl01
 *
 *    EXECUTED BY	: anyone
 *
 *    TEST TITLE	: Basic test for prctl(2)
 *
 *    TEST CASE TOTAL	: 2
 *
 *    AUTHOR		: Saji Kumar.V.R <saji.kumar@wipro.com>
 *
 *    SIGNALS
 * 	Uses SIGUSR1 to pause before test if option set.
 * 	(See the parse_opts(3) man page).
 *
 *    DESCRIPTION
 *	This is a Phase I test for the prctl(2) system call.
 *	It is intended to provide a limited exposure of the system call.
 *
 * 	Setup:
 * 	  Setup signal handling.
 *	  Pause for SIGUSR1 if option specified.
 *
 * 	Test:
 *	 Loop if the proper options are given.
 *	 fork a child
 *
 *	 CHILD:
 *		call prctl() with proper arguments
 *		If call succeeds,
 *			exit with 0
 *		else
 *			exit with 1
 *	 PARENT:
 *		wait() for child.
 *		If child exits with exit value 0,
 *			Test passed
 *		else
 *			Test Failed
 *
 * 	Cleanup:
 * 	  Print errno log and/or timing stats if options given
 *
 * USAGE:  <for command-line>
 *  prctl01 [-c n] [-e] [-i n] [-I x] [-P x] [-t] [-h] [-f] [-p]
 *			where,  -c n : Run n copies concurrently.
 *				-e   : Turn on errno logging.
 *				-h   : Show help screen
 *				-f   : Turn off functional testing
 *				-i n : Execute test n times.
 *				-I x : Execute test for x seconds.
 *				-p   : Pause for SIGUSR1 before starting
 *				-P x : Pause for x seconds between iterations.
 *				-t   : Turn on syscall timing.
 *
 ****************************************************************/

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

#include "test.h"

static void setup(void);
static void cleanup(void);

char *TCID = "prctl01";

int option[2] = { PR_GET_PDEATHSIG, PR_SET_PDEATHSIG };

int TST_TOTAL = 2;

int main(int ac, char **av)
{

	int lc, i;
	const char *msg;
	pid_t child_pid;
	int status, sig;

	if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL)
		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);

	setup();

	for (lc = 0; TEST_LOOPING(lc); lc++) {

		tst_count = 0;

		for (i = 0; i < TST_TOTAL; ++i) {

			switch (child_pid = FORK_OR_VFORK()) {

			case -1:
				/* fork() failed */
				tst_resm(TFAIL, "fork() failed");
				continue;

			case 0:
				/* Child */
				if (i == 1) {
					sig = SIGUSR2;
					TEST(prctl(option[i], sig));
				} else {
					TEST(prctl(option[i], &sig));
				}

				if (TEST_RETURN == 0) {
					exit(0);
				} else {
					tst_resm(TWARN | TTERRNO,
						 "prctl() returned %ld",
						 TEST_RETURN);
					exit(1);
				}

			default:
				/* Parent */
				if ((waitpid(child_pid, &status, 0)) < 0) {
					tst_resm(TFAIL, "waitpid() failed");
					continue;
				}

				if ((WIFEXITED(status)) &&
				    (WEXITSTATUS(status) == 0)) {
					tst_resm(TPASS, "Test Passed");
				} else {
					tst_resm(TFAIL, "Test Failed");
				}

			}
		}
	}

	/* cleanup and exit */
	cleanup();
	tst_exit();

}

/* setup() - performs all ONE TIME setup for this test */
void setup(void)
{

	tst_sig(FORK, DEF_HANDLER, cleanup);

	TEST_PAUSE;

}

/*
 *cleanup() -  performs all ONE TIME cleanup for this test at
 *		completion or premature exit.
 */
void cleanup(void)
{

}