UDEVD(8) Linux Administrator’s Manual UDEVD(8)
udevd, udevdsend - udev event serializer daemon and udev event sender
udevd allows the serialization of hotplug(8) events. The events gener-
ated by the kernel may arrive in random order in userspace, that makes
it neccessary to reorder them.
udevd takes care of the kernel supplied SEQNUM sequence number and
arranges the events for execution in the correct order. Missing
sequences delay the execution of the following events until a timeout
is reached. Events without any sequence number are bypassing the queue
and will be executed immediately.
For each event a udev(8) instance is executed in the background with
the complete environment received by the hotplug event. All further
events for the same device are delayed until the execution is finished.
This way there will never be more than one instance running for a sin-
gle device at the same time.
udevd receives the events from udevsend If udevd isn’t already running,
udevsend will start it.
udev(8), udevinfo(8), hotplug(8)
udevd was developed primarily by Kay Sievers <email@example.com>,
with much help from others.
February 2004 UDEVD(8)
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