#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>

int main() {
    unlink("fa");
    unlink("fb");
    mkfifo("fa", 0666);
    mkfifo("fb", 0666);
    printf("I am Peter...\n");
    if (fork() == 0) {
        int fd2 = open("fb", O_RDONLY);
        char buf[100];
        while (1) {
            memset(buf, 0, 100);
            if (read(fd2, buf, 100) == 0) {
                kill(getppid(), 9);
                return 0;
            }
            printf("\rJack says:%s", buf);
            fflush(stdout);
        }
    } else {
        int fd1 = open("fa", O_WRONLY);
        char buf[100];
        while (1) {
            fgets(buf, sizeof(buf), stdin);
            write(fd1, buf, sizeof(buf));
        }
    }
    return 0;
}