[thirdparty/systemd.git] / udevd.8

.TH UDEVD 8 "February 2004" "" "Linux Administrator's Manual"
.SH NAME
udevd, udevdsend \- udev event serializer daemon and udev event sender
.SH SYNOPSIS
.BI udevsend
.SH "DESCRIPTION"
.B udevd
allows the serialization of
.BR hotplug (8)
events. The events generated by the kernel may arrive in random order
in userspace, that makes it neccessary to reorder them.
.br
.B udevd
takes care of the kernel supplied
.B 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.
.br
For each event a
.BR 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 single device at the same time.
.br
.B udevd
receives the events from
.B udevsend
If
.B udevd
isn't already running,
.B udevsend
will start it.
.SH "SEE ALSO"
.BR udev (8),
.BR udevinfo (8),
.BR hotplug (8)
.SH AUTHORS
.B udevd
was developed primarily by Kay Sievers <kay.sievers@vrfy.org>, with much help
from others.
Commit	Line	Data
	1	.TH UDEVD 8 "February 2004" "" "Linux Administrator's Manual"
	2	.SH NAME
	3	udevd, udevdsend \- udev event serializer daemon and udev event sender
	4	.SH SYNOPSIS
	5	.BI udevsend
	6	.SH "DESCRIPTION"
	7	.B udevd
	8	allows the serialization of
	9	.BR hotplug (8)
	10	events. The events generated by the kernel may arrive in random order
	11	in userspace, that makes it neccessary to reorder them.
	12	.br
	13	.B udevd
	14	takes care of the kernel supplied
	15	.B SEQNUM
	16	sequence number and arranges the events for execution in the correct order.
	17	Missing sequences delay the execution of the following events until a timeout
	18	is reached. Events without any sequence number are bypassing the queue and
	19	will be executed immediately.
	20	.br
	21	For each event a
	22	.BR udev (8)
	23	instance is executed in the background with the complete environment received
	24	by the hotplug event. All further events for the same device are delayed until
	25	the execution is finished. This way there will never be more than one instance
	26	running for a single device at the same time.
	27	.br
	28	.B udevd
	29	receives the events from
	30	.B udevsend
	31	If
	32	.B udevd
	33	isn't already running,
	34	.B udevsend
	35	will start it.
	36	.SH "SEE ALSO"
	37	.BR udev (8),
	38	.BR udevinfo (8),
	39	.BR hotplug (8)
	40	.SH AUTHORS
	41	.B udevd
	42	was developed primarily by Kay Sievers <kay.sievers@vrfy.org>, with much help
	43	from others.