//////////////////////////////////////////////////////////////////////////////
// Course:	  			Real Time Systems
// Lecturer:      		Dr.-Ing. Frank Golatowski
// Exercise instructor: M.Sc. Michael Rethfeldt
// Exercise:      		1
// Task:          		2
// Name:          		aufgabe2.c
// Description:   		?
//////////////////////////////////////////////////////////////////////////////
#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 )
	{
		printf("* I am the son. *\n");
		exit(3);
	}
	else if (fork_pid == -1)
	{
		printf("fork() failed!\n");
		exit(2);
	}
	wait(&status);		                      // wait for termination of son process
    // status: hexa decimal output from son process
    // (status>>8) & 0xff: second (higher byte) of the status
    // status & 0xff: first (lower byte) of the status
	printf("wait status: 0x%x | 0x%x | 0x%x |\n", status, (status>>8) & 0xff, status & 0xff);
	return 0;
}