udevd \- udev event serializer daemon
.br
udevsend \- sends the event to udevd
+.SH SYNOPSIS
+.BI udevsend " hotplug-subsystem"
+.sp
+The environment must provide the following variables:
+.TP
+.B ACTION
+.IR add " or " remove
+signifies the connection or disconnection of a device.
+.TP
+.B DEVPATH
+The sysfs devpath of the device without the mountpoint but a leading slash.
+.TP
+.B SEQNUM
+The sequence number of the event provided by the kernel.
+If unset, the event bypasses the queue and will be executed immediately.
.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 it.
+in userspace, that makes it neccessary to reorder them.
.br
.B udevd
takes care of the kernel supplied sequence number and arranges the events for
-execution in the correct order. Missing sequences are delaying the
-execution of the following events until a timeout of a maximum of 5 seconds
-is reached.
+execution in the correct order. Missing sequences delay the execution of the
+following events until a timeout is reached.
.br
For each event a
.BR udev (8)
instance is executed in the background. All further events for the same device
-are delayed until the execution is finished. This way it will never run more
-than one instance for a single device at the same time.
+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
will start it.
.SH "SEE ALSO"
-.BR udev (8), hotplug (8)
+.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
~ianmdlvl / elogind.git / blobdiff