-.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.
-.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.
-.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.
-.br
-.B udevd
-receives the events from
-.B udevsend
-which is called by
-.BR hotplug (8).
-If
-.B udevd
-isn't already running,
-.B udevsend
-will start it.
+\fBstop_exec_queue\fR
+udevcontrol stops the execution of events from udevd.
+.TP
+\fBstart_exec_queue\fR
+udevcontrol starts the execution of events from udevd.
+.SH "ENVIRONMENT"
+.TP
+\fBUDEV_LOG\fR
+Overrides the syslog priority specified in the config file.
+.SH "AUTHOR"
+.PP
+Written by Kay Sievers
+<kay.sievers@vrfy.org>.