/*
* Copyright (c) 2004, 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., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.


* This sample test aims to check the following assertion:
*
* The child process is created with no pending signal

* The steps are:
* -> block SIGUSR1 and SIGUSR2
* -> send those signals and wait they are pending
* -> fork
* -> check the signals are blocked but not pending in the new process.

* The test fails if the signals are pending or if 
* they are not blocked (this counters assertion 2).

*/


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

#include <signal.h>

/********************************************************************************************/
/******************************   Test framework   *****************************************/
/********************************************************************************************/
#include "testfrmw.h"
 #include "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

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

/* The main test function. */
int main( int argc, char * argv[] )
{
	int ret, status;
	pid_t child, ctl;

	sigset_t mask, pending;

	/* Initialize output */
	output_init();

	/* block SIGUSR1 and SIGUSR2 */
	ret = sigemptyset( &mask );

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

	ret = sigaddset( &mask, SIGUSR1 );

	if ( ret != 0 )
	{
		UNRESOLVED( errno, "Failed to add SIGUSR1 to signal set" );
	}

	ret = sigaddset( &mask, SIGUSR2 );

	if ( ret != 0 )
	{
		UNRESOLVED( errno, "Failed to add SIGUSR2 to signal set" );
	}

	ret = sigprocmask( SIG_BLOCK, &mask, NULL );

	if ( ret != 0 )
	{
		UNRESOLVED( errno, "Sigprocmask failed" );
	}

	/* Make the signals pending */
	ret = kill( getpid(), SIGUSR1 );

	if ( ret != 0 )
	{
		UNRESOLVED( errno, "failed to kill with SIGUSR1" );
	}

	ret = kill( getpid(), SIGUSR2 );

	if ( ret != 0 )
	{
		UNRESOLVED( errno, "failed to kill with SIGUSR2" );
	}

	do
	{
		ret = sigpending( &pending );

		if ( ret != 0 )
		{
			UNRESOLVED( errno, "failed to examine pending signal set" );
		}

		ret = sigismember( &pending, SIGUSR1 );

		if ( ret < 0 )
		{
			UNRESOLVED( errno, "Unable to check signal USR1 presence" );
		}

		if ( ret == 1 )
		{
			ret = sigismember( &pending, SIGUSR2 );

			if ( ret < 0 )
			{
				UNRESOLVED( errno, "Unable to check signal USR2 presence" );
			}
		}
	}
	while ( ret != 1 );

#if VERBOSE > 0

	output( "SIGUSR1 and SIGUSR2 are pending, we can fork\n" );

#endif

	/* Create the child */
	child = fork();

	if ( child == ( pid_t ) - 1 )
	{
		UNRESOLVED( errno, "Failed to fork" );
	}

	/* child */
	if ( child == ( pid_t ) 0 )
	{
		/* Examine the current blocked signal set. USR1 & USR2 shall be present */
		ret = sigprocmask( 0, NULL, &mask );

		if ( ret != 0 )
		{
			UNRESOLVED( errno, "Sigprocmask failed in child" );
		}

		ret = sigismember( &mask, SIGUSR1 );

		if ( ret < 0 )
		{
			UNRESOLVED( errno, "Unable to check signal USR1 presence" );
		}

		if ( ret == 0 )
		{
			FAILED( "The new process does not mask SIGUSR1 as its parent" );
		}

		ret = sigismember( &mask, SIGUSR2 );

		if ( ret < 0 )
		{
			UNRESOLVED( errno, "Unable to check signal USR2 presence" );
		}

		if ( ret == 0 )
		{
			FAILED( "The new process does not mask SIGUSR2 as its parent" );
		}

#if VERBOSE > 0
		output( "SIGUSR1 and SIGUSR2 are blocked in child\n" );

#endif

		/* Examine pending signals */
		ret = sigpending( &pending );

		if ( ret != 0 )
		{
			UNRESOLVED( errno, "failed to examine pending signal set in child" );
		}

		ret = sigismember( &pending, SIGUSR1 );

		if ( ret < 0 )
		{
			UNRESOLVED( errno, "Unable to check signal USR1 presence" );
		}

		if ( ret != 0 )
		{
			FAILED( "The new process was created with SIGUSR1 pending" );
		}

		ret = sigismember( &pending, SIGUSR2 );

		if ( ret < 0 )
		{
			UNRESOLVED( errno, "Unable to check signal USR2 presence" );
		}

		if ( ret != 0 )
		{
			FAILED( "The new process was created with SIGUSR2 pending" );
		}

#if VERBOSE > 0
		output( "SIGUSR1 and SIGUSR2 are not pending in child\n" );

#endif

		/* We're done */
		exit( PTS_PASS );
	}

	/* Parent joins the child */
	ctl = waitpid( child, &status, 0 );

	if ( ctl != child )
	{
		UNRESOLVED( errno, "Waitpid returned the wrong PID" );
	}

	if ( ( !WIFEXITED( status ) ) || ( WEXITSTATUS( status ) != PTS_PASS ) )
	{
		FAILED( "Child exited abnormally" );
	}

	/* Test passed */
#if VERBOSE > 0

	output( "Test passed\n" );

#endif

	PASSED;
}