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+<?xml version='1.0'?>
+<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+ "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+
+<refentry id="systemd-udevd.service">
+ <refentryinfo>
+ <title>systemd-udevd.service</title>
+ <productname>systemd</productname>
+ <authorgroup>
+ <author>
+ <contrib>Developer</contrib>
+ <firstname>Kay</firstname>
+ <surname>Sievers</surname>
+ <email>kay@vrfy.org</email>
+ </author>
+ </authorgroup>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>systemd-udevd</refentrytitle>
+ <manvolnum>8</manvolnum>
+ <refmiscinfo class="version"></refmiscinfo>
+ </refmeta>
+
+ <refnamediv>
+ <refname>systemd-udevd</refname>
+ <refname>systemd-udevd.service</refname>
+ <refname>systemd-udevd-control.socket</refname>
+ <refname>systemd-udevd-kernel.socket</refname>
+ <refpurpose>Device event managing daemon</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <para><filename>systemd-udevd.service</filename></para>
+ <para><filename>systemd-udevd-control.socket</filename></para>
+ <para><filename>systemd-udevd-kernel.socket</filename></para>
+
+ <cmdsynopsis>
+ <command>/usr/lib/systemd/systemd-udevd</command>
+ <arg><option>--daemon</option></arg>
+ <arg><option>--debug</option></arg>
+ <arg><option>--children-max=</option></arg>
+ <arg><option>--exec-delay=</option></arg>
+ <arg><option>--resolve-names=early|late|never</option></arg>
+ <arg><option>--version</option></arg>
+ <arg><option>--help</option></arg>
+ </cmdsynopsis>
+
+ </refsynopsisdiv>
+
+ <refsect1><title>Description</title>
+ <para>systemd-udevd listens to kernel uevents. For every event, systemd-udevd executes matching
+ instructions specified in udev rules. See <citerefentry>
+ <refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum>
+ </citerefentry>.</para>
+ <para>The behavior of the running daemon can be changed with
+ <command>udevadm control</command>.</para>
+ </refsect1>
+
+ <refsect1><title>Options</title>
+ <variablelist>
+ <varlistentry>
+ <term><option>--daemon</option></term>
+ <listitem>
+ <para>Detach and run in the background.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--debug</option></term>
+ <listitem>
+ <para>Print debug messages to stderr.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--children-max=</option></term>
+ <listitem>
+ <para>Limit the number of parallel executed events.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--exec-delay=</option></term>
+ <listitem>
+ <para>Number of seconds to delay the execution of RUN instructions.
+ This might be useful when debugging system crashes during coldplug
+ cause by loading non-working kernel modules.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--resolve-names=</option></term>
+ <listitem>
+ <para>Specify when systemd-udevd should resolve names of users and groups.
+ When set to <option>early</option> (the default) names will be
+ resolved when the rules are parsed. When set to
+ <option>late</option> names will be resolved for every event.
+ When set to <option>never</option> names will never be resolved
+ and all devices will be owned by root.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--version</option></term>
+ <listitem>
+ <para>Print version number.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--help</option></term>
+ <listitem>
+ <para>Print help text.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1><title>Environment</title>
+ <variablelist>
+ <varlistentry>
+ <term><varname>UDEV_LOG=</varname></term>
+ <listitem>
+ <para>Set the logging priority.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1><title>Kernel command line</title>
+ <variablelist>
+ <para>The parameters starting with "rd.", will be read when udev is used in an initrd.</para>
+ <varlistentry>
+ <term><varname>udev.log-priority=</varname></term>
+ <term><varname>rd.udev.log-priority=</varname></term>
+ <listitem>
+ <para>Set the logging priority.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>udev.children-max=</varname></term>
+ <term><varname>rd.udev.children-max=</varname></term>
+ <listitem>
+ <para>Limit the number of parallel executed events.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>udev.exec-delay=</varname></term>
+ <term><varname>rd.udev.exec-delay=</varname></term>
+ <listitem>
+ <para>Number of seconds to delay the execution of RUN instructions.
+ This might be useful when debugging system crashes during coldplug
+ cause by loading non-working kernel modules.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para><citerefentry>
+ <refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum>
+ </citerefentry>, <citerefentry>
+ <refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum>
+ </citerefentry></para>
+ </refsect1>
+</refentry>