Determine cdrom loaded
CD-ROM stands for Compact Disk - Read-Only Memory
CD-ROM mounted?
findmnt -c --source /dev/cdrom --output TARGET
findmnt -c --source /dev/sr0 --output TARGET
eject CD-ROM:
Determine cdrom loaded
1. cd-info
2. head -n1 /dev/cdrom
3. blockdev --getsize64 /dev/sr0
4. file -s /dev/cdrom
5. udevadm info -p property /dev/cdrom