monitor will print the received events for:
UDEV - the event which udev sends out after rule processing

UDEV  [1286761364.038060] change   /devices/pci0000:00/0000:00:11.1/host5/target5:0:0/5:0:0:0 (scsi)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:11.1/host5/target5:0:0/5:0:0:0
SUBSYSTEM=scsi
SDEV_MEDIA_CHANGE=1
DEVTYPE=scsi_device
DRIVER=sr
MODALIAS=scsi:t-0x05
SEQNUM=1986

UDEV  [1286761364.065315] change   /devices/pci0000:00/0000:00:11.1/host5/target5:0:0/5:0:0:0/block/sr2 (block)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:11.1/host5/target5:0:0/5:0:0:0/block/sr2
SUBSYSTEM=block
DEVNAME=/dev/sr2
DEVTYPE=disk
SEQNUM=1987
ID_CDROM=1
ID_CDROM_MRW=1
ID_CDROM_MRW_W=1
ID_CDROM_MEDIA=1
ID_SCSI=1
ID_VENDOR=TEAC
ID_VENDOR_ENC=TEAC\x20\x20\x20\x20
ID_MODEL=CD-532E-B
ID_MODEL_ENC=CD-532E-B\x20\x20\x20\x20\x20\x20\x20
ID_REVISION=3.0B
ID_TYPE=cd
ID_BUS=scsi
ID_PATH=pci-0000:00:11.1-scsi-1:0:0:0
GENERATED=1
UDISKS_PRESENTATION_NOPOLICY=0
MAJOR=11
MINOR=2
DEVLINKS=/dev/block/11:2 /dev/scd2 /dev/disk/by-path/pci-0000:00:11.1-scsi-1:0:0:0 /dev/cdrom
TAGS=:udev-acl: