#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

int var = 42;

int main(int argc, char** argv) {
	FILE* f;

	if(fork()) { 
		printf("[%d] Je suis ton père\n", getpid());
		while(!(f = fopen("sync", "r")));
		unlink("sync");
		printf("[%d] After\n", getpid());
	} else {
		printf("[%d] Hhh hhh non, non\n", getpid());
		var = 666;
		printf("[%d] Before\n", getpid());
		f = fopen("sync", "w+");
	}
	fclose(f);
	printf("[%d] var is at %p and contains %d\n", getpid(), &var, var);

	return EXIT_SUCCESS;
}