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+<?xml version='1.0'?>
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+ "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
+
+<refentry id="udev.conf"
+ xmlns:xi="http://www.w3.org/2001/XInclude">
+
+ <refentryinfo>
+ <title>udev.conf</title>
+ <productname>systemd</productname>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>udev.conf</refentrytitle>
+ <manvolnum>5</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>udev.conf</refname>
+ <refpurpose>Configuration for device event managing daemon</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <para><filename>/etc/udev/udev.conf</filename></para>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>
+ <citerefentry><refentrytitle>systemd-udevd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ expects its main configuration file at
+ <filename>/etc/udev/udev.conf</filename>. It consists of a set
+ of variables allowing the user to override default udev
+ values. All empty lines or lines beginning with '#' are
+ ignored. The following variables can be set:
+ </para>
+
+ <variablelist class='config-directives'>
+ <varlistentry>
+ <term><varname>udev_log=</varname></term>
+
+ <listitem>
+ <para>The log level. Valid values are the numerical
+ syslog priorities or their textual representations:
+ <option>err</option>, <option>info</option> and
+ <option>debug</option>.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>children_max=</varname></term>
+
+ <listitem>
+ <para>An integer. The maximum number of events executed in parallel.</para>
+
+ <para>This is the same as the <option>--children-max=</option> option.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>exec_delay=</varname></term>
+
+ <listitem>
+ <para>An integer. Delay the execution of each <varname>RUN{<replaceable>program</replaceable>}</varname>
+ parameter by the given number of seconds. This option
+ might be useful when debugging system crashes during
+ coldplug caused by loading non-working kernel
+ modules.</para>
+
+ <para>This is the same as the <option>--exec-delay=</option> option.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>event_timeout=</varname></term>
+
+ <listitem>
+ <para>An integer. The number of seconds to wait for events to finish. After
+ this time, the event will be terminated. The default is 180 seconds.</para>
+
+ <para>This is the same as the <option>--event-timeout=</option> option.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>resolve_names=</varname></term>
+
+ <listitem>
+ <para>Specifies 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>
+
+ <para>This is the same as the <option>--resolve-names=</option> option.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>timeout_signal=</varname></term>
+
+ <listitem>
+ <para>Specifies a signal that <filename>systemd-udevd</filename> will send on worker
+ timeouts. Note that both workers and spawned processes will be killed using this
+ signal. Defaults to <option>SIGKILL</option>.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+
+ <para>
+ In addition, <filename>systemd-udevd</filename> can be configured
+ by command line options and the kernel command line (see
+ <citerefentry><refentrytitle>systemd-udevd</refentrytitle><manvolnum>8</manvolnum></citerefentry>).
+ </para>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd-udevd</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+</refentry>