-Print log messages to stdout.
-.TP 3n
-\fB\-\-help\fR
-Print usage.
-.TP 3n
-\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 3n
-\fBstop_exec_queue\fR
-udevcontrol stops the execution of events from udevd.
-.TP 3n
-\fBstart_exec_queue\fR
-udevcontrol starts the execution of events from udevd.