//////////////////////////////////////////////////////////////////////////////
// Course:	  			Real Time Systems
// Lecturer:      		Dr.-Ing. Frank Golatowski
// Exercise instructor: M.Sc. Michael Rethfeldt
// Exercise:      		2
// Task:          		1
// Name:          		aufgabe1_vater.c
// Description:   		Father process executes an external son process
//////////////////////////////////////////////////////////////////////////////
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>

int main(void)
{	int status;
	pid_t fork_pid;
	if ( (fork_pid=fork() ) == 0 )
	{	execl("./son", "son", NULL);
		printf("execl() failed!\n");
		exit(3);
	}
	else if (fork_pid == -1)
	{	printf("fork() failed!\n");
		exit(2);
	}
	wait(&status); // wait for termination of son
	printf("wait status: 0x%x | 0x%x | 0x%x |\n", status, (status>>8) & 0xff, status & 0xff);
	return 0;
}