-Print usage.
-.RE
-.PP
-\fBlog_priority=\fR\fB\fIvalue\fR\fR
-.RS 4
-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.
-.RE
-.PP
-\fBstop_exec_queue\fR
-.RS 4
-udevcontrol stops the execution of events from udevd.
-.RE
-.PP
-\fBstart_exec_queue\fR
-.RS 4
-udevcontrol starts the execution of events from udevd.