<!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">
+<refentry id="systemd-udevd.service"
+ xmlns:xi="http://www.w3.org/2001/XInclude">
+
<refentryinfo>
<title>systemd-udevd.service</title>
<productname>systemd</productname>
</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>
+ <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>
<para>Detach and run in the background.</para>
</listitem>
</varlistentry>
+
<varlistentry>
<term><option>--debug</option></term>
<listitem>
- <para>Print debug messages to stderr.</para>
+ <para>Print debug messages to standard error.</para>
</listitem>
</varlistentry>
+
<varlistentry>
<term><option>--children-max=</option></term>
<listitem>
- <para>Limit the number of parallel executed events.</para>
+ <para>Limit the number of events executed in parallel.</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>
+ <para>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>
</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
+ 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
+ <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>
+
+ <xi:include href="standard-options.xml" xpointer="help-text" />
</varlistentry>
+ <xi:include href="standard-options.xml" xpointer="version" />
</variablelist>
</refsect1>
<refsect1><title>Environment</title>
- <variablelist>
+ <variablelist class='environment-variables'>
<varlistentry>
- <term><varname>UDEV_LOG=</varname></term>
+ <term><varname>$UDEV_LOG=</varname></term>
<listitem>
<para>Set the logging priority.</para>
</listitem>
</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>
+ <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.children-max=</varname></term>
<term><varname>rd.udev.children-max=</varname></term>
<listitem>
- <para>Limit the number of parallel executed events.</para>
+ <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>
<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>
+ <para>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>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>net.ifnames=</varname></term>
+ <listitem>
+ <para>Network interfaces are renamed to give them predictable names
+ when possible. It is enabled by default; specifying 0 disables it.</para>
</listitem>
</varlistentry>
</variablelist>
+ <!-- when adding entries here, consider also adding them
+ 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>
~ianmdlvl / elogind.git / blobdiff