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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 <varname>RUN</varname>
+          instructions 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>