testcases/open_posix_testsuite/conformance/interfaces/sigaction/23-16.c

/*
* Copyright (c) 2005, 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

* This sample test aims to check the following assertions:
*
* If SA_NODEFER is not set in sa_flags, the caught signal is added to the
* thread's signal mask during the handler execution.

* The steps are:
* -> register a signal handler for SIGTTOU
* -> raise SIGTTOU
* -> In handler, check for reentrance then raise SIGTTOU again.

* The test fails if signal handler if reentered or signal is not pending when raised again.
*/

/* We are testing conformance to IEEE Std 1003.1, 2003 Edition */
#define _POSIX_C_SOURCE 200112L

/******************************************************************************/
/*************************** standard includes ********************************/
/******************************************************************************/
#include <pthread.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <signal.h>
#include <errno.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

#define SIGNAL SIGTTOU

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

int called = 0;

void handler(int sig)
{
	int ret;
	sigset_t pending;
	called++;

	if (called == 2) {
		FAILED("Signal was not masked in signal handler");
	}

	if (called == 1) {

		/* Raise the signal again. It should be masked */
		ret = raise(SIGNAL);

		if (ret != 0) {
			UNRESOLVED(ret, "Failed to raise SIGTTOU again");
		}

		/* check the signal is pending */
		ret = sigpending(&pending);

		if (ret != 0) {
			UNRESOLVED(ret, "Failed to get pending signal set");
		}

		ret = sigismember(&pending, SIGNAL);

		if (ret != 1) {
			FAILED("signal is not pending");
		}
	}

	called++;
}

/* main function */
int main(void)
{
	int ret;

	struct sigaction sa;

	/* Initialize output */
	output_init();

	/* Set the signal handler */
	sa.sa_flags = 0;

	sa.sa_handler = handler;

	ret = sigemptyset(&sa.sa_mask);

	if (ret != 0) {
		UNRESOLVED(ret, "Failed to empty signal set");
	}

	/* Install the signal handler for SIGTTOU */
	ret = sigaction(SIGNAL, &sa, 0);

	if (ret != 0) {
		UNRESOLVED(ret, "Failed to set signal handler");
	}

	ret = raise(SIGNAL);

	if (ret != 0) {
		UNRESOLVED(ret, "Failed to raise SIGTTOU");
	}

	while (called != 4)
		sched_yield();

	/* Test passed */
#if VERBOSE > 0

	output("Test passed\n");

#endif

	PASSED;
}