<?xml version='1.0'?>
-<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-<article>
- <section>
+<refentry id="udevd">
+ <refentryinfo>
<title>udevd</title>
- <refentry>
- <refentryinfo>
- <title>udevd</title>
- <date>August 2005</date>
- <productname>udev</productname>
- </refentryinfo>
+ <productname>udev</productname>
+ </refentryinfo>
- <refmeta>
- <refentrytitle>udevd</refentrytitle>
- <manvolnum>8</manvolnum>
- <refmiscinfo class="version"></refmiscinfo>
- </refmeta>
+ <refmeta>
+ <refentrytitle>udevd</refentrytitle>
+ <manvolnum>8</manvolnum>
+ <refmiscinfo class="version"></refmiscinfo>
+ </refmeta>
- <refnamediv>
- <refname>udevd</refname><refpurpose>event managing daemon</refpurpose>
- </refnamediv>
+ <refnamediv>
+ <refname>udevd</refname><refpurpose>event managing daemon</refpurpose>
+ </refnamediv>
- <refsynopsisdiv>
- <cmdsynopsis>
- <command>udevd</command>
- <arg><option>--daemon</option></arg>
- <arg><option>--debug-trace</option></arg>
- <arg><option>--debug</option></arg>
- <arg><option>--version</option></arg>
- <arg><option>--resolve-names=early|late|never</option></arg>
- <arg><option>--help</option></arg>
- </cmdsynopsis>
- </refsynopsisdiv>
+ <refsynopsisdiv>
+ <cmdsynopsis>
+ <command>udevd</command>
+ <arg><option>--daemon</option></arg>
+ <arg><option>--debug</option></arg>
+ <arg><option>--children-max=</option></arg>
+ <arg><option>--exec-delay=</option></arg>
+ <arg><option>--resolve-names=early|late|never</option></arg>
+ <arg><option>--version</option></arg>
+ <arg><option>--help</option></arg>
+ </cmdsynopsis>
+ </refsynopsisdiv>
- <refsect1><title>DESCRIPTION</title>
- <para>udevd listens to kernel uevents and passes the incoming events to
- udev. It ensures the correct event order and takes care, that events for child
- devices are delayed until the parent event has finished the device handling.
- The behavior of the running daemon can be changed with
- <command>udevadm control</command>.</para>
- </refsect1>
+ <refsect1><title>Description</title>
+ <para>udevd listens to kernel uevents. For every event, udevd executes matching
+ instructions specified in udev rules. See <citerefentry>
+ <refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum>
+ </citerefentry>.</para>
+ <para>On startup the content of the directory <filename>/lib/udev/devices</filename>
+ is copied to <filename>/dev</filename>. If kernel modules specify static device
+ nodes, these nodes are created even without a corresponding kernel device, to
+ allow on-demand loading of kernel modules. Matching permissions specified in udev
+ rules are applied to these static device nodes.</para>
+ <para>The behavior of the running daemon can be changed with
+ <command>udevadm control</command>.</para>
+ </refsect1>
- <refsect1><title>OPTIONS</title>
- <variablelist>
- <varlistentry>
- <term><option>--daemon</option></term>
- <listitem>
- <para>Detach and run in the background.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>--debug-trace</option></term>
- <listitem>
- <para>Run all events completely serialized. This may be useful if udev triggers
- actions or loads kernel modules which cause problems and a slow but continuous
- operation is needed, where no events are processed in parallel.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>--debug</option></term>
- <listitem>
- <para>Print debug messages to stderr.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>--resolve-names</option></term>
- <listitem>
- <para>Specify when 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>--version</option></term>
- <listitem>
- <para>Print version number.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>--help</option></term>
- <listitem>
- <para>Print help text.</para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect1>
+ <refsect1><title>Options</title>
+ <variablelist>
+ <varlistentry>
+ <term><option>--daemon</option></term>
+ <listitem>
+ <para>Detach and run in the background.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--debug</option></term>
+ <listitem>
+ <para>Print debug messages to stderr.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--children-max=</option></term>
+ <listitem>
+ <para>Limit the number of parallel executed events.</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>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--resolve-names=</option></term>
+ <listitem>
+ <para>Specify when 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>--version</option></term>
+ <listitem>
+ <para>Print version number.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--help</option></term>
+ <listitem>
+ <para>Print help text.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
- <refsect1><title>ENVIRONMENT</title>
- <variablelist>
- <varlistentry>
- <term><option>UDEV_LOG</option></term>
- <listitem>
- <para>Overrides the syslog priority specified in the config file.</para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect1>
+ <refsect1><title>Environment</title>
+ <variablelist>
+ <varlistentry>
+ <term><varname>UDEV_LOG=</varname></term>
+ <listitem>
+ <para>Set the logging priority.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
- <refsect1><title>AUTHOR</title>
- <para>Written by Kay Sievers <email>kay.sievers@vrfy.org</email>.</para>
- </refsect1>
+ <refsect1><title>Kernel command line</title>
+ <variablelist>
+ <varlistentry>
+ <term><varname>udev.log-priority=</varname></term>
+ <listitem>
+ <para>Set the logging priority.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>udev.children-max=</varname></term>
+ <listitem>
+ <para>Limit the number of parallel executed events.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>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>
+ </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>
- </refsect1>
- </refentry>
- </section>
-</article>
+ <refsect1><title>Author</title>
+ <para>Written by Kay Sievers <email>kay.sievers@vrfy.org</email>.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para><citerefentry>
+ <refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum>
+ </citerefentry>, <citerefentry>
+ <refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum>
+ </citerefentry></para>
+ </refsect1>
+</refentry>
~ianmdlvl / elogind.git / blobdiff