#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <assert.h>


int main(int argc, char const *argv[]){

	int p[2];
	pipe (p);
	pid_t pid = getpid();
	

	/*Pf1 -*/
	if (fork() == 0) {
		printf("processeur pf1\n");

		/*pf1f1*/
		if (fork() == 0) {

			read(p[0], &pid, sizeof(pid_t) );

			while (1) {
				sleep(3);
				printf("PID : %ld\n", pid);
			}
			
		}

		close (p[0]);
	
	}

	/*Pf2 -> écrit*/
	if (fork() == 0) {	

		//printf("while ok\n");

		write (p[1], &pid, sizeof(pid_t));
	
		close (p[1]);

	} 




	return 0;
}