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

int main(int argc, char* argv[]){
	int i, status;
	int fd, pid;
	
	fd = open("lockf.c", O_RDONLY);
	fflush(NULL);
	srand(time(NULL));
	for(i = 0; i<6; i++){
		pid = fork();
		
		if(pid!=0) continue;
		if(pid==0){
			printf("Child: going to sleep ... (%d)\n", getpid());
			sleep(10);
			exit(0);
		}
	}
	waitpid(-1, NULL, 0);
	
	printf("Parent: all processes have been terminated.\n");
	fflush(NULL);
	
	return 0;
}