xref: /external/ltp/testcases/open_posix_testsuite/conformance/interfaces/sigset/7-1.c

/*
 * Copyright (c) 2003, Intel Corporation. All rights reserved.
 * Created by:  salwan.searty REMOVE-THIS AT intel DOT com
 * This file is licensed under the GPL license.  For the full content
 * of this license, see the COPYING file at the top level of this
 * source tree.
 *
 *
 * Updated: 20-06-2011 Peter W. Morreale <pmorreale@novell.com>
 *
 * This program tests the assertion that if disp is SIG_HOLD, then the
 * signal's disposition shall remain unchanged
 *
 * Steps:
 * 1. Register SIGCHLD with myhandler
 * 2. Add SIGCHLD to the process's signal mask using sigset with disp
 *    equal to SIG_HOLD
 * 3. raise SIGCHLD
 * 4. remove SIGCHLD from the signal mask
 * 5. Verify that the original disposition hasn't been changed, by making
 *    sure that SIGCHLD is still handled by myhandler.
 */

#define _XOPEN_SOURCE 600

#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include "posixtest.h"

#define ERR_MSG(f, rc) printf("Failed: func: %s rc: %u errno: %s\n", \
						f, rc, strerror(errno))

static int handler_called;

static void myhandler(int signo)
{
	handler_called = 1;
}

int main(void)
{
	sigset_t pendingset;
	struct sigaction act;
	int rc;

	act.sa_handler = myhandler;
	act.sa_flags = 0;
	sigemptyset(&act.sa_mask);

	rc = sigaction(SIGCHLD, &act, 0);
	if (rc) {
		ERR_MSG("sigaction()", rc);
		return PTS_UNRESOLVED;
	}

	if (sigset(SIGCHLD, SIG_HOLD) == SIG_ERR) {
		perror("Unexpected error while using sigset()");
		return PTS_UNRESOLVED;
	}

	raise(SIGCHLD);

	rc = sigpending(&pendingset);
	if (rc) {
		ERR_MSG("sigpending()", rc);
		return PTS_UNRESOLVED;
	}

	rc = sigismember(&pendingset, SIGCHLD);
	if (rc != 1) {
		ERR_MSG("sigismember()", rc);
		return PTS_UNRESOLVED;
	}

	sigrelse(SIGCHLD);

	if (!handler_called) {
		printf("Failed: Signal not delivered\n");
		return PTS_FAIL;
	}

	printf("Test PASSED\n");
	return PTS_PASS;
}