FUT

    #include <stdio.h>
    #include <stdlib.h>
    #include <fcntl.h>
    #include <sys/stat.h>
    #include <sys/ioctl.h>
    #include <string.h>
    #include <unistd.h>
    
    void print_help(char *prog_name) {
            printf("Usage: %s [-n] DEVNAME COMMAND\n", prog_name);