<!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>
<refmeta>
<refentrytitle>systemd-udevd.service</refentrytitle>
<manvolnum>8</manvolnum>
- <refmiscinfo class="version"></refmiscinfo>
</refmeta>
<refnamediv>
<refname>systemd-udevd.service</refname>
+ <refname>systemd-udevd-control.socket</refname>
+ <refname>systemd-udevd-kernel.socket</refname>
<refname>systemd-udevd</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>--debug</option></arg>
<arg><option>--children-max=</option></arg>
<arg><option>--exec-delay=</option></arg>
+ <arg><option>--event-timeout=</option></arg>
<arg><option>--resolve-names=early|late|never</option></arg>
<arg><option>--version</option></arg>
<arg><option>--help</option></arg>
</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>
+ <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 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>
<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>
+ <term><option>--event-timeout=</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>
+ <para>Set the number of seconds to wait for events to finish. After
+ this time the event will be terminated. The default is 30 seconds.</para>
</listitem>
</varlistentry>
+
<varlistentry>
- <term><option>--version</option></term>
+ <term><option>--resolve-names=</option></term>
<listitem>
- <para>Print version number.</para>
+ <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>--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>
+ <para>Set the log level.</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>
+ <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>
<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>
<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>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 kernel drivers taking too long to initialize.</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>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>
~ianmdlvl / elogind.git / blobdiff