ioctl, opens CD drive

ioctl.c

// https://manpages.courier-mta.org/htmlman2/ioctl.2.html
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <linux/cdrom.h>
#include <sys/ioctl.h>
#include <unistd.h>

int main(int argc, char* argv[])
{
    // Path to CD-ROM drive
    char* dev = "/dev/dvd";
    int fd = open(dev, O_RDONLY | O_NONBLOCK);

    if (fd == -1) {
        printf("Failed to open '%s'\n", dev);
        exit(1);
    }

    printf("fd: %d\n", fd);

    // Eject the CD-ROM tray 
    ioctl(fd, CDROMEJECT);
    sleep(2);

    // Close the CD-ROM tray
    ioctl(fd, CDROMCLOSETRAY);
    close(fd);

    return 0;
}