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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+<!--
+ SPDX-License-Identifier: LGPL-2.1+
+-->
+
<refentry id="systemd-udevd.service"
xmlns:xi="http://www.w3.org/2001/XInclude">
<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.service</refentrytitle>
<manvolnum>8</manvolnum>
- <refmiscinfo class="version"></refmiscinfo>
</refmeta>
<refnamediv>
<refsect1><title>Description</title>
<para><command>systemd-udevd</command> 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>
+ 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 daemon can be configured using
+ <citerefentry><refentrytitle>udev.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ its command line options, environment variables, and on the kernel
+ command line, or changed dynamically with <command>udevadm
+ control</command>.
+ </para>
</refsect1>
<refsect1><title>Options</title>
<variablelist>
<varlistentry>
+ <term><option>-d</option></term>
<term><option>--daemon</option></term>
<listitem>
<para>Detach and run in the background.</para>
</varlistentry>
<varlistentry>
+ <term><option>-D</option></term>
<term><option>--debug</option></term>
<listitem>
<para>Print debug messages to standard error.</para>
</varlistentry>
<varlistentry>
+ <term><option>-c=</option></term>
<term><option>--children-max=</option></term>
<listitem>
<para>Limit the number of events executed in parallel.</para>
</varlistentry>
<varlistentry>
+ <term><option>-e=</option></term>
<term><option>--exec-delay=</option></term>
<listitem>
<para>Delay the execution of <varname>RUN</varname>
</varlistentry>
<varlistentry>
+ <term><option>-t=</option></term>
<term><option>--event-timeout=</option></term>
<listitem>
- <para>Wait for the event to finish up to the given
- number of seconds. After this time the event will
- be terminated. Default is 30.</para>
+ <para>Set the number of seconds to wait for events to finish. After
+ this time, the event will be terminated. The default is 180 seconds.</para>
</listitem>
</varlistentry>
<varlistentry>
+ <term><option>-N=</option></term>
<term><option>--resolve-names=</option></term>
<listitem>
<para>Specify when systemd-udevd should resolve names of users and groups.
</listitem>
</varlistentry>
- <varlistentry>
- <term><option>--help</option></term>
-
- <xi:include href="standard-options.xml" xpointer="help-text" />
- </varlistentry>
+ <xi:include href="standard-options.xml" xpointer="help" />
<xi:include href="standard-options.xml" xpointer="version" />
</variablelist>
</refsect1>
- <refsect1><title>Environment</title>
- <variablelist class='environment-variables'>
- <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 class='kernel-commandline-options'>
<para>Parameters starting with "rd." will be read when
<command>systemd-udevd</command> is used in an initrd.</para>
<varlistentry>
- <term><varname>udev.log-priority=</varname></term>
- <term><varname>rd.udev.log-priority=</varname></term>
+ <term><varname>udev.log_priority=</varname></term>
+ <term><varname>rd.udev.log_priority=</varname></term>
<listitem>
- <para>Set the logging priority.</para>
+ <para>Set the log level.</para>
</listitem>
</varlistentry>
<varlistentry>
- <term><varname>udev.children-max=</varname></term>
- <term><varname>rd.udev.children-max=</varname></term>
+ <term><varname>udev.children_max=</varname></term>
+ <term><varname>rd.udev.children_max=</varname></term>
<listitem>
<para>Limit the number of events executed in parallel.</para>
</listitem>
</varlistentry>
<varlistentry>
- <term><varname>udev.exec-delay=</varname></term>
- <term><varname>rd.udev.exec-delay=</varname></term>
+ <term><varname>udev.exec_delay=</varname></term>
+ <term><varname>rd.udev.exec_delay=</varname></term>
<listitem>
<para>Delay the execution of <varname>RUN</varname> instructions by the given
number of seconds. This option might be useful when
</listitem>
</varlistentry>
<varlistentry>
- <term><varname>udev.event-timeout=</varname></term>
- <term><varname>rd.udev.event-timeout=</varname></term>
+ <term><varname>udev.event_timeout=</varname></term>
+ <term><varname>rd.udev.event_timeout=</varname></term>
<listitem>
<para>Wait for events to finish up to the given number
of seconds. This option might be useful if events are
- terminated due to a timeout in large configurations.</para>
+ terminated due to kernel drivers taking too long to initialize.</para>
</listitem>
</varlistentry>
<varlistentry>
in kernel-command-line.xml -->
</refsect1>
- <refsect1><title>Configuration file</title>
- <para>udev 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>
- <varlistentry>
- <term><varname>udev_log</varname></term>
- <listitem>
- <para>The logging priority. Valid values are the numerical syslog priorities
- or their textual representations: <option>err</option>, <option>info</option>
- and <option>debug</option>.</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>
+ <para>
+ <citerefentry><refentrytitle>udev.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ </para>
</refsect1>
</refentry>
projects / thirdparty / systemd.git / blobdiff