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

KERNEL[1266056577.704907] change   /devices/virtual/block/loop0 (block)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/virtual/block/loop0
SUBSYSTEM=block
DEVNAME=loop0
DEVTYPE=disk
SEQNUM=14329
MAJOR=7
MINOR=0

UDEV  [1266056577.712368] change   /devices/virtual/block/loop0 (block)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/virtual/block/loop0
SUBSYSTEM=block
DEVNAME=/dev/loop0
DEVTYPE=disk
SEQNUM=14329
ID_FS_UUID=bf9e961c-b24e-45bd-a8a7-d33e706497bf
ID_FS_UUID_ENC=bf9e961c-b24e-45bd-a8a7-d33e706497bf
ID_FS_VERSION=256
ID_FS_TYPE=crypto_LUKS
ID_FS_USAGE=crypto
MAJOR=7
MINOR=0
DEVLINKS=/dev/block/7:0 /dev/disk/by-uuid/bf9e961c-b24e-45bd-a8a7-d33e706497bf

KERNEL[1266056580.995480] add      /devices/virtual/block/dm-5 (block)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/virtual/block/dm-5
SUBSYSTEM=block
DEVNAME=dm-5
DEVTYPE=disk
SEQNUM=14330
MAJOR=253
MINOR=5

KERNEL[1266056580.995534] add      /devices/virtual/bdi/253:5 (bdi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/virtual/bdi/253:5
SUBSYSTEM=bdi
SEQNUM=14331

UDEV  [1266056580.996047] add      /devices/virtual/bdi/253:5 (bdi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/virtual/bdi/253:5
SUBSYSTEM=bdi
SEQNUM=14331

KERNEL[1266056580.997164] change   /devices/virtual/block/dm-5 (block)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/virtual/block/dm-5
SUBSYSTEM=block
DISK_RO=1
DEVNAME=dm-5
DEVTYPE=disk
SEQNUM=14332
MAJOR=253
MINOR=5

KERNEL[1266056580.997230] change   /devices/virtual/block/dm-5 (block)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/virtual/block/dm-5
SUBSYSTEM=block
DM_COOKIE=196608
DEVNAME=dm-5
DEVTYPE=disk
SEQNUM=14333
MAJOR=253
MINOR=5

UDEV  [1266056581.001559] add      /devices/virtual/block/dm-5 (block)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/virtual/block/dm-5
SUBSYSTEM=block
DEVNAME=/dev/dm-5
DEVTYPE=disk
SEQNUM=14330
DM_SBIN_PATH=/sbin
DM_NAME=temporary-cryptsetup-19856
MAJOR=253
MINOR=5
DEVLINKS=/dev/mapper/temporary-cryptsetup-19856 /dev/block/253:5
DM_SUSPENDED=0
DM_UDEV_RULES_VSN=1
DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG=1
DM_UDEV_DISABLE_DISK_RULES_FLAG=1
DM_UDEV_DISABLE_OTHER_RULES_FLAG=1

UDEV  [1266056581.003272] change   /devices/virtual/block/dm-5 (block)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/virtual/block/dm-5
SUBSYSTEM=block
DISK_RO=1
DEVNAME=/dev/dm-5
DEVTYPE=disk
SEQNUM=14332
DM_SBIN_PATH=/sbin
DM_NAME=temporary-cryptsetup-19856
MAJOR=253
MINOR=5
DEVLINKS=/dev/mapper/temporary-cryptsetup-19856 /dev/block/253:5
DM_SUSPENDED=0
DM_UDEV_RULES_VSN=1
DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG=1
DM_UDEV_DISABLE_DISK_RULES_FLAG=1
DM_UDEV_DISABLE_OTHER_RULES_FLAG=1

UDEV  [1266056581.028088] change   /devices/virtual/block/dm-5 (block)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/virtual/block/dm-5
SUBSYSTEM=block
DM_COOKIE=196608
DEVNAME=/dev/dm-5
DEVTYPE=disk
SEQNUM=14333
DM_SBIN_PATH=/sbin
DM_UDEV_DISABLE_DM_RULES_FLAG=1
DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG=1
DM_NAME=temporary-cryptsetup-19856
MAJOR=253
MINOR=5
DEVLINKS=/dev/block/253:5
DM_SUSPENDED=0
DM_UDEV_RULES_VSN=1
DM_UDEV_DISABLE_DISK_RULES_FLAG=1
DM_UDEV_DISABLE_OTHER_RULES_FLAG=1

KERNEL[1266056581.047655] change   /devices/virtual/block/dm-5 (block)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/virtual/block/dm-5
SUBSYSTEM=block
DM_COOKIE=196608
DEVNAME=dm-5
DEVTYPE=disk
SEQNUM=14334
MAJOR=253
MINOR=5

KERNEL[1266056581.047720] remove   /devices/virtual/block/dm-5 (block)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/virtual/block/dm-5
SUBSYSTEM=block
DM_COOKIE=196608
DEVNAME=dm-5
DEVTYPE=disk
SEQNUM=14335
MAJOR=253
MINOR=5

KERNEL[1266056581.058117] remove   /devices/virtual/bdi/253:5 (bdi)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/virtual/bdi/253:5
SUBSYSTEM=bdi
SEQNUM=14336

KERNEL[1266056581.058357] remove   /devices/virtual/block/dm-5 (block)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/virtual/block/dm-5
SUBSYSTEM=block
DEVNAME=dm-5
DEVTYPE=disk
SEQNUM=14337
MAJOR=253
MINOR=5

UDEV  [1266056581.058968] remove   /devices/virtual/bdi/253:5 (bdi)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/virtual/bdi/253:5
SUBSYSTEM=bdi
SEQNUM=14336

UDEV  [1266056581.075169] change   /devices/virtual/block/dm-5 (block)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/virtual/block/dm-5
SUBSYSTEM=block
DM_COOKIE=196608
DEVNAME=/dev/dm-5
DEVTYPE=disk
SEQNUM=14334
DM_SBIN_PATH=/sbin
DM_UDEV_DISABLE_DM_RULES_FLAG=1
DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG=1
DM_UDEV_RULES_VSN=1
DKD_MEDIA_AVAILABLE=0
DKD_PRESENTATION_NOPOLICY=1
MAJOR=253
MINOR=5
DEVLINKS=/dev/disk/by-id/dm-name- /dev/block/253:5

UDEV  [1266056581.080898] remove   /devices/virtual/block/dm-5 (block)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/virtual/block/dm-5
SUBSYSTEM=block
DM_COOKIE=196608
DEVNAME=/dev/dm-5
DEVTYPE=disk
SEQNUM=14335
DM_SBIN_PATH=/sbin
DM_UDEV_DISABLE_DM_RULES_FLAG=1
DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG=1
DM_UDEV_RULES_VSN=1
DKD_MEDIA_AVAILABLE=0
DKD_PRESENTATION_NOPOLICY=1
MAJOR=253
MINOR=5
DEVLINKS=/dev/disk/by-id/dm-name- /dev/block/253:5

UDEV  [1266056581.081474] remove   /devices/virtual/block/dm-5 (block)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/virtual/block/dm-5
SUBSYSTEM=block
DEVNAME=/dev/dm-5
DEVTYPE=disk
SEQNUM=14337
DM_SBIN_PATH=/sbin
MAJOR=253
MINOR=5

KERNEL[1266056582.070486] add      /devices/virtual/block/dm-5 (block)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/virtual/block/dm-5
SUBSYSTEM=block
DEVNAME=dm-5
DEVTYPE=disk
SEQNUM=14338
MAJOR=253
MINOR=5

KERNEL[1266056582.070540] add      /devices/virtual/bdi/253:5 (bdi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/virtual/bdi/253:5
SUBSYSTEM=bdi
SEQNUM=14339

KERNEL[1266056582.071380] change   /devices/virtual/block/dm-5 (block)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/virtual/block/dm-5
SUBSYSTEM=block
DM_COOKIE=196608
DEVNAME=dm-5
DEVTYPE=disk
SEQNUM=14340
MAJOR=253
MINOR=5

UDEV  [1266056582.071934] add      /devices/virtual/bdi/253:5 (bdi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/virtual/bdi/253:5
SUBSYSTEM=bdi
SEQNUM=14339

UDEV  [1266056582.087791] add      /devices/virtual/block/dm-5 (block)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/virtual/block/dm-5
SUBSYSTEM=block
DEVNAME=/dev/dm-5
DEVTYPE=disk
SEQNUM=14338
DM_SBIN_PATH=/sbin
DM_NAME=testluks
DM_UUID=CRYPT-bf9e961c-b24e-45bd-a8a7-d33e706497bf
DM_SUSPENDED=0
DM_UDEV_RULES_VSN=1
ID_FS_SEC_TYPE=msdos
ID_FS_UUID=4B75-561B
ID_FS_UUID_ENC=4B75-561B
ID_FS_VERSION=FAT16
ID_FS_TYPE=vfat
ID_FS_USAGE=filesystem
MAJOR=253
MINOR=5
DEVLINKS=/dev/mapper/testluks /dev/disk/by-id/dm-name-testluks /dev/disk/by-id/dm-uuid-CRYPT-bf9e961c-b24e-45bd-a8a7-d33e706497bf /dev/disk/by-uuid/4B75-561B /dev/block/253:5

UDEV  [1266056582.119159] change   /devices/virtual/block/dm-5 (block)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/virtual/block/dm-5
SUBSYSTEM=block
DM_COOKIE=196608
DEVNAME=/dev/dm-5
DEVTYPE=disk
SEQNUM=14340
DM_SBIN_PATH=/sbin
DM_UDEV_DISABLE_DM_RULES_FLAG=1
DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG=1
DM_NAME=testluks
DM_UUID=CRYPT-bf9e961c-b24e-45bd-a8a7-d33e706497bf
DM_SUSPENDED=0
DM_UDEV_RULES_VSN=1
ID_FS_SEC_TYPE=msdos
ID_FS_UUID=4B75-561B
ID_FS_UUID_ENC=4B75-561B
ID_FS_VERSION=FAT16
ID_FS_TYPE=vfat
ID_FS_USAGE=filesystem
DKD_MEDIA_AVAILABLE=1
DKD_PARTITION_TABLE=1
DKD_PARTITION_TABLE_SCHEME=mbr
DKD_DM_NAME=testluks
DKD_DM_UUID=CRYPT-bf9e961c-b24e-45bd-a8a7-d33e706497bf
DKD_DM_STATE=ACTIVE
DKD_DM_TABLE_STATE=LIVE
DKD_DM_OPENCOUNT=0
DKD_DM_LAST_EVENT_NR=0
DKD_DM_MAJOR=253
DKD_DM_MINOR=5
DKD_DM_TARGET_COUNT=1
DKD_DM_TARGET_TYPES=crypt
DKD_PRESENTATION_NOPOLICY=1
MAJOR=253
MINOR=5
DEVLINKS=/dev/disk/by-id/dm-name-testluks /dev/disk/by-id/dm-uuid-CRYPT-bf9e961c-b24e-45bd-a8a7-d33e706497bf /dev/disk/by-uuid/4B75-561B /dev/block/253:5