/*
 * Copyright 2002-2019 Intel Corporation.
 * 
 * This software is provided to you as Sample Source Code as defined in the accompanying
 * End User License Agreement for the Intel(R) Software Development Products ("Agreement")
 * section 1.L.
 * 
 * This software and the related documents are provided as is, with no express or implied
 * warranties, other than those that are expressly stated in the License.
 */

#include <stdlib.h>
#include <stdio.h>
#include <signal.h>


static void HandleUSR1(int);
static void HandleUSR2(int);


int main()
{
	struct sigaction sigact;

	sigact.sa_handler = HandleUSR1;
	sigemptyset(&sigact.sa_mask);
	sigact.sa_flags = 0;
	if (sigaction(SIGUSR1, &sigact, 0) == -1) {
		fprintf(stderr, "Unable handle signal USR1\n");
		return 1;
	}
	sigact.sa_handler = HandleUSR2;
	if (sigaction(SIGUSR2, &sigact, 0) == -1) {
		fprintf(stderr, "Unable handle signal USR2\n");
		return 1;
	}

    raise(SIGUSR1);
    return 0;
}


static void HandleUSR1(int sig)
{
    raise(SIGUSR2);
    raise(SIGUSR2);
}


static void HandleUSR2(int sig)
{
    static int count = 0;

    if (++count == 2)
        exit(0);
}