/*
 * 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 <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <signal.h>

int main(int argc, char ** argv)
{
	if (argc > 1)
	{
		FILE *out = fopen("sigchld_app.out", "w");
		struct sigaction action;
		sigaction(SIGCHLD, 0, &action);
		if (action.sa_handler == SIG_IGN)
		{
			fprintf(out, "SA handler of the child process is SIG_IGN\n");	
		}
		else if (action.sa_handler == SIG_DFL)
		{
			fprintf(out, "SA handler of the child process is SIG_DFL\n");
		}
		fclose(out);
		return 0;
		
	}

		
    struct sigaction action;
    char *execv_argv[3];
    execv_argv[0] = argv[0];
    execv_argv[1] = "1";
    execv_argv[2] = NULL;

	// do not transform children into zombies when they terminate
    action.sa_handler = SIG_IGN;
    sigemptyset(&action.sa_mask);
    action.sa_flags = SA_NOCLDWAIT;
    sigaction(SIGCHLD, &action, NULL);
	
	// it requires a care inside Pin, othrewise injector fails
    
	execv(execv_argv[0], execv_argv);
	printf("exec failed\n");
	return -1;
}