r0 = openat$cdrom(0xffffffffffffff9c, &(0x7f0000000000), 0x800, 0x0)
openat$cdrom(0xffffffffffffff9c, &(0x7f0000001fc0), 0x0, 0x0)
ioctl$CDROM_CHANGER_NSLOTS(r0, 0x5328)