-.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.
-.br
-.B udevd
-receives the events from
-.B udevsend
-which is called by
-.BR hotplug (8)
-
+.PP
+udevd listens to kernel uevents and passes the incoming events to udev. It ensures the right event order and takes care, that events for child devices are delayed until the parent has finished the device handling.
+.SH "OPTIONS"
+.TP
+\fB\-\-daemon\fR
+Detach and run in the background.
+.TP
+\fBlog_priority=\fR\fB\fIvalue\fR\fR
+udevcontrol can dynamically set the log level of udevd. Valid values are the numerical syslog priorities or their textual representations:
+\fBerr\fR,
+\fBinfo\fR
+and
+\fBdebug\fR.
+.TP
+\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>.