udevmonitor will print the received events for:
UDEV the event which udev sends out after rule processing
UEVENT the kernel uevent

UDEV  [1185066458.681283] add      /devices/pci0000:00/0000:00:13.2/usb3/3-3 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:13.2/usb3/3-3
SUBSYSTEM=usb
SEQNUM=2801
PHYSDEVBUS=usb
DEVICE=/proc/bus/usb/003/008
PRODUCT=bc2/3000/0
TYPE=0/0/0
UDEVD_EVENT=1

UDEV  [1185066458.681352] add      /class/usb_endpoint/usbdev3.8_ep00 (usb_endpoint)
UDEV_LOG=3
ACTION=add
DEVPATH=/class/usb_endpoint/usbdev3.8_ep00
SUBSYSTEM=usb_endpoint
SEQNUM=2802
MAJOR=254
MINOR=6
UDEVD_EVENT=1
DEVNAME=/dev/usbdev3.8_ep00

UDEV  [1185066458.681365] add      /devices/pci0000:00/0000:00:13.2/usb3/3-3/3-3:1.0 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:13.2/usb3/3-3/3-3:1.0
SUBSYSTEM=usb
SEQNUM=2803
PHYSDEVBUS=usb
DEVICE=/proc/bus/usb/003/008
PRODUCT=bc2/3000/0
TYPE=0/0/0
INTERFACE=8/6/80
MODALIAS=usb:v0BC2p3000d0000dc00dsc00dp00ic08isc06ip50
UDEVD_EVENT=1

UDEV  [1185066458.681380] add      /class/usb_endpoint/usbdev3.8_ep01 (usb_endpoint)
UDEV_LOG=3
ACTION=add
DEVPATH=/class/usb_endpoint/usbdev3.8_ep01
SUBSYSTEM=usb_endpoint
SEQNUM=2805
MAJOR=254
MINOR=7
UDEVD_EVENT=1
DEVNAME=/dev/usbdev3.8_ep01

UDEV  [1185066458.682286] add      /class/usb_endpoint/usbdev3.8_ep81 (usb_endpoint)
UDEV_LOG=3
ACTION=add
DEVPATH=/class/usb_endpoint/usbdev3.8_ep81
SUBSYSTEM=usb_endpoint
SEQNUM=2806
MAJOR=254
MINOR=8
UDEVD_EVENT=1
DEVNAME=/dev/usbdev3.8_ep81

UDEV  [1185066458.682304] add      /class/scsi_host/host7 (scsi_host)
UDEV_LOG=3
ACTION=add
DEVPATH=/class/scsi_host/host7
SUBSYSTEM=scsi_host
SEQNUM=2804
PHYSDEVPATH=/devices/pci0000:00/0000:00:13.2/usb3/3-3/3-3:1.0/host7
UDEVD_EVENT=1

UDEV  [1185066458.682316] add      /class/usb_device/usbdev3.8 (usb_device)
UDEV_LOG=3
ACTION=add
DEVPATH=/class/usb_device/usbdev3.8
SUBSYSTEM=usb_device
SEQNUM=2807
PHYSDEVPATH=/devices/pci0000:00/0000:00:13.2/usb3/3-3
PHYSDEVBUS=usb
PHYSDEVDRIVER=usb
MAJOR=189
MINOR=263
UDEVD_EVENT=1
USB_BUS=003
USB_DEV=008
DEVNAME=/dev/bus/usb/003/008

UEVENT[1185066463.545449] add      /devices/pci0000:00/0000:00:13.2/usb3/3-3/3-3:1.0/host7/target7:0:0/7:0:0:0 (scsi)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:13.2/usb3/3-3/3-3:1.0/host7/target7:0:0/7:0:0:0
SUBSYSTEM=scsi
SEQNUM=2808
PHYSDEVBUS=scsi

UEVENT[1185066463.545470] add      /class/scsi_disk/7:0:0:0 (scsi_disk)
ACTION=add
DEVPATH=/class/scsi_disk/7:0:0:0
SUBSYSTEM=scsi_disk
SEQNUM=2809
PHYSDEVPATH=/devices/pci0000:00/0000:00:13.2/usb3/3-3/3-3:1.0/host7/target7:0:0/7:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd

UDEV  [1185066467.745925] add      /devices/pci0000:00/0000:00:13.2/usb3/3-3/3-3:1.0/host7/target7:0:0/7:0:0:0 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:13.2/usb3/3-3/3-3:1.0/host7/target7:0:0/7:0:0:0
SUBSYSTEM=scsi
SEQNUM=2808
PHYSDEVBUS=scsi
UDEVD_EVENT=1

UDEV  [1185066467.745947] add      /class/scsi_disk/7:0:0:0 (scsi_disk)
UDEV_LOG=3
ACTION=add
DEVPATH=/class/scsi_disk/7:0:0:0
SUBSYSTEM=scsi_disk
SEQNUM=2809
PHYSDEVPATH=/devices/pci0000:00/0000:00:13.2/usb3/3-3/3-3:1.0/host7/target7:0:0/7:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd
UDEVD_EVENT=1

UDEV  [1185066471.379856] add      /class/scsi_device/7:0:0:0 (scsi_device)
UDEV_LOG=3
ACTION=add
DEVPATH=/class/scsi_device/7:0:0:0
SUBSYSTEM=scsi_device
SEQNUM=2812
PHYSDEVPATH=/devices/pci0000:00/0000:00:13.2/usb3/3-3/3-3:1.0/host7/target7:0:0/7:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd
UDEVD_EVENT=1

UDEV  [1185066471.379881] add      /class/scsi_generic/sg1 (scsi_generic)
UDEV_LOG=3
ACTION=add
DEVPATH=/class/scsi_generic/sg1
SUBSYSTEM=scsi_generic
SEQNUM=2813
PHYSDEVPATH=/devices/pci0000:00/0000:00:13.2/usb3/3-3/3-3:1.0/host7/target7:0:0/7:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd
MAJOR=21
MINOR=1
UDEVD_EVENT=1
DEVNAME=/dev/sg1

UEVENT[1185066471.379895] add      /class/scsi_device/7:0:0:0 (scsi_device)
ACTION=add
DEVPATH=/class/scsi_device/7:0:0:0
SUBSYSTEM=scsi_device
SEQNUM=2812
PHYSDEVPATH=/devices/pci0000:00/0000:00:13.2/usb3/3-3/3-3:1.0/host7/target7:0:0/7:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd

UEVENT[1185066471.379905] add      /class/scsi_generic/sg1 (scsi_generic)
ACTION=add
DEVPATH=/class/scsi_generic/sg1
SUBSYSTEM=scsi_generic
SEQNUM=2813
PHYSDEVPATH=/devices/pci0000:00/0000:00:13.2/usb3/3-3/3-3:1.0/host7/target7:0:0/7:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd
MAJOR=21
MINOR=1

UDEV  [1185066471.420597] add      /block/sdb (block)
UDEV_LOG=3
ACTION=add
DEVPATH=/block/sdb
SUBSYSTEM=block
SEQNUM=2810
MINOR=16
MAJOR=8
PHYSDEVPATH=/devices/pci0000:00/0000:00:13.2/usb3/3-3/3-3:1.0/host7/target7:0:0/7:0:0:0
PHYSDEVBUS=scsi
PHYSDEVDRIVER=sd
UDEVD_EVENT=1
ID_VENDOR=Seagate
ID_MODEL=FreeAgentDesktop
ID_REVISION=100D
ID_SERIAL=Seagate_FreeAgentDesktop_9QF413N9-0:0
ID_SERIAL_SHORT=9QF413N9
ID_TYPE=disk
ID_INSTANCE=0:0
ID_BUS=usb
ID_PATH=pci-0000:00:13.2-usb-0:3:1.0-scsi-0:0:0:0
DEVNAME=/dev/sdb
DEVLINKS=/dev/disk/by-id/usb-Seagate_FreeAgentDesktop_9QF413N9-0:0 /dev/disk/by-path/pci-0000:00:13.2-usb-0:3:1.0-scsi-0:0:0:0

UDEV  [1185066471.454354] add      /block/sdb/sdb1 (block)
UDEV_LOG=3
ACTION=add
DEVPATH=