xref: /external/ltp/testcases/kernel/syscalls/kill/kill06.c

/*
 *
 *   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
 */

/*
 * NAME
 *	kill06.c
 *
 * DESCRIPTION
 *	Test case to check the basic functionality of kill() when killing an
 *	entire process group with a negative pid.
 *
 * ALGORITHM
 *	call setup
 *	loop if the -i option was given
 *	fork 5 children
 *	execute the kill system call
 *	check the return value
 *	if return value is -1
 *		issue a FAIL message, break remaining tests and cleanup
 *	if we are doing functional testing
 *		if the processes were terminated with the expected signal.
 *			issue a PASS message
 *		otherwise
 *			issue a FAIL message
 *	call cleanup
 *
 * USAGE
 *  kill06 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
 *     where,  -c n : Run n copies concurrently.
 *             -f   : Turn off functionality Testing.
 *             -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
 *	This test should be run as a non-root user.
 */

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

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

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

char *TCID= "kill06()";
int TST_TOTAL = 1;

extern int Tst_count;

#define TEST_SIG SIGKILL

int main(int ac, char **av)
{
	int lc;                         /* loop counter */
	char *msg;                      /* message returned from parse_opts */
	pid_t pid1, pid2;
	int exno, status, nsig, i;

	/* parse standard options */
	if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){
		tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
	}

	setup();                        /* global setup */

	/* The following loop checks looping state if -i option given */
	for (lc = 0; TEST_LOOPING(lc); lc++) {

		/* reset Tst_count in case we are looping */
		Tst_count = 0;
		status = 1;
		exno = 1;

		/* Fork a process and set the process group so that */
		/* it is different from this one.  Fork 5 more children. */

		pid1 = fork();
		if (pid1 < 0) {
			tst_brkm(TBROK, cleanup, "Fork of first child failed");
		} else if (pid1 == 0) {
			setpgrp();
			for (i = 0; i < 5; i++) {
				pid2 = fork();
				if (pid2 < 0) {
					tst_brkm(TBROK, cleanup, "Fork failed");
				} else if (pid2 == 0) {
					sleep(299);
                        		/*NOTREACHED*/
                        		tst_resm(TINFO, "%d never recieved a"
						" signal", getpid());
					exit(exno);
				}
			}
			/* Kill all processes in this process group */
			TEST(kill(-pid1, TEST_SIG));
			sleep(300);
			/*NOTREACHED*/
                        tst_resm(TINFO, "%d never recieved a"
				" signal", getpid());
			exit(exno);
		} else {
			waitpid(pid1, &status, 0);
			if (TEST_RETURN != 0) {
				tst_brkm(TFAIL, cleanup, "%s failed - errno = "
						"%d : %s", TCID, TEST_ERRNO,
						strerror(TEST_ERRNO));
			}
		}

		if (STD_FUNCTIONAL_TEST) {
			/*
			 * Check to see if the process was terminated with the
			 * expected signal.
			 */
			nsig = WTERMSIG(status);
			if (! nsig) {
				tst_resm(TFAIL, "Did not receive any signal");
			} else if (nsig == TEST_SIG) {
				tst_resm(TPASS, "received expected signal %d",
					nsig);
			} else {
				tst_resm(TFAIL, "expected signal %d received %d"
					,TEST_SIG,nsig);
			}
		}
	}
	cleanup();

	/*NOTREACHED*/
	return(0);
}


/*
 * setup() - performs all ONE TIME setup for this test
 */
void
setup(void)
{
	/* Setup default signal handling */
	tst_sig(FORK, DEF_HANDLER, cleanup);

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

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

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