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

int main(){
    int fd, pid, n;
    char buf[10];

    fd = open("test.txt", O_RDWR);
    pid = fork();

    if(pid == 0){
        write(fd, "FOXLIVER", O_RDWR);
        close(fd);
        exit(0);
    }else{
        wait(0);
        lseek(fd, 0, SEEK_SET);
        n = read(fd, buf, 9);
        buf[n] = '\0';
        printf("%s \n", buf);
        close(fd);
    }

    return 0;
}