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


int main(){
	int pid = fork();
	if (pid == -1) {
	  exit(0);
	}
	if (pid == 0) {
	  printf("fork = %d, pid = %d, ppid = %d\n",pid,getpid(),getppid());
	  sleep(4);
	  exit(2);
	}
	if (pid > 0) {
	  printf("fork = %d, pid = %d, ppid = %d\n",pid,getpid(),getppid());
	  printf("%d\n",wait());
	  exit(2);
	}
}