CDトレイを開閉
ruby -e 'IO.open(IO.sysopen("/dev/cdrom",File::NONBLOCK)){|io|io.ioctl(0x5309)}'
ruby -e 'IO.open(IO.sysopen("/dev/cdrom",File::NONBLOCK)){|io|io.ioctl(0x5319)}'
ruby -e 'IO.open(IO.sysopen("/dev/cdrom",File::NONBLOCK)){|io|io.ioctl(0x5309)}'
ruby -e 'IO.open(IO.sysopen("/dev/cdrom",File::NONBLOCK)){|io|io.ioctl(0x5319)}'