# udevmonitor --env
udevmonitor prints the received event from the kernel [UEVENT]
and the event which udev sends out after rule processing [UDEV]

UEVENT[1155433780.497192] add@/devices/pci0000:00/0000:00:1e.0/0000:01:09.0/0000:02:00.0
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:01:09.0/0000:02:00.0
SUBSYSTEM=pci
SEQNUM=2643
PHYSDEVBUS=pci
PCI_CLASS=20000
PCI_ID=168C:0013
PCI_SUBSYS_ID=1385:5B00
PCI_SLOT_NAME=0000:02:00.0
MODALIAS=pci:v0000168Cd00000013sv00001385sd00005B00bc02sc00i00

UDEV  [1155433780.657183] add@/devices/pci0000:00/0000:00:1e.0/0000:01:09.0/0000:02:00.0
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1e.0/0000:01:09.0/0000:02:00.0
SUBSYSTEM=pci
SEQNUM=2643
PHYSDEVBUS=pci
PCI_CLASS=20000
PCI_ID=168C:0013
PCI_SUBSYS_ID=1385:5B00
PCI_SLOT_NAME=0000:02:00.0
MODALIAS=pci:v0000168Cd00000013sv00001385sd00005B00bc02sc00i00
UDEVD_EVENT=1