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New sections are added: PAM options, crypttab options, commandline options, miscellaneous. The last category will be used for all untagged <varname> elements. Commandline options sections is meant to be a developer tool: when adding an option it is sometimes useful to be able to check if similarly named options exist elsewhere.
169 lines
5.8 KiB
XML
169 lines
5.8 KiB
XML
<?xml version='1.0'?>
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<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<refentry id="systemd-udevd.service">
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<refentryinfo>
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<title>systemd-udevd.service</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Kay</firstname>
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<surname>Sievers</surname>
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<email>kay@vrfy.org</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd-udevd.service</refentrytitle>
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<manvolnum>8</manvolnum>
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<refmiscinfo class="version"></refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>systemd-udevd.service</refname>
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<refname>systemd-udevd-control.socket</refname>
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<refname>systemd-udevd-kernel.socket</refname>
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<refname>systemd-udevd</refname>
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<refpurpose>Device event managing daemon</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>systemd-udevd.service</filename></para>
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<para><filename>systemd-udevd-control.socket</filename></para>
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<para><filename>systemd-udevd-kernel.socket</filename></para>
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<cmdsynopsis>
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<command>/usr/lib/systemd/systemd-udevd</command>
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<arg><option>--daemon</option></arg>
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<arg><option>--debug</option></arg>
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<arg><option>--children-max=</option></arg>
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<arg><option>--exec-delay=</option></arg>
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<arg><option>--resolve-names=early|late|never</option></arg>
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<arg><option>--version</option></arg>
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<arg><option>--help</option></arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1><title>Description</title>
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<para><command>systemd-udevd</command> listens to kernel uevents.
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For every event, systemd-udevd executes matching instructions
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specified in udev rules. See <citerefentry>
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<refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum>
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</citerefentry>.</para>
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<para>The behavior of the running daemon can be changed with
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<command>udevadm control</command>.</para>
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</refsect1>
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<refsect1><title>Options</title>
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<variablelist>
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<varlistentry>
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<term><option>--daemon</option></term>
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<listitem>
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<para>Detach and run in the background.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--debug</option></term>
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<listitem>
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<para>Print debug messages to stderr.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--children-max=</option></term>
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<listitem>
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<para>Limit the number of events executed in parallel.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--exec-delay=</option></term>
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<listitem>
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<para>Delay the execution of RUN instruction by the given
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number of seconds. This option might be useful when
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debugging system crashes during coldplug caused by loading
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non-working kernel modules.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--resolve-names=</option></term>
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<listitem>
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<para>Specify when systemd-udevd should resolve names of users and groups.
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When set to <option>early</option> (the default) names will be
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resolved when the rules are parsed. When set to
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<option>late</option> names will be resolved for every event.
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When set to <option>never</option> names will never be resolved
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and all devices will be owned by root.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--version</option></term>
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<listitem>
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<para>Print version number.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--help</option></term>
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<listitem>
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<para>Print help text.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1><title>Environment</title>
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<variablelist class='environment-variables'>
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<varlistentry>
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<term><varname>$UDEV_LOG=</varname></term>
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<listitem>
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<para>Set the logging priority.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1><title>Kernel command line</title>
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<variablelist class='kernel-commandline-options'>
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<para>Parameters starting with "rd." will be read when
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<command>systemd-udevd</command> is used in an initrd.</para>
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<varlistentry>
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<term><varname>udev.log-priority=</varname></term>
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<term><varname>rd.udev.log-priority=</varname></term>
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<listitem>
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<para>Set the logging priority.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>udev.children-max=</varname></term>
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<term><varname>rd.udev.children-max=</varname></term>
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<listitem>
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<para>Limit the number of events executed in parallel.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>udev.exec-delay=</varname></term>
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<term><varname>rd.udev.exec-delay=</varname></term>
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<listitem>
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<para>Delay the execution of RUN instruction by the given
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number of seconds. This option might be useful when
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debugging system crashes during coldplug caused by loading
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non-working kernel modules.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para><citerefentry>
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<refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum>
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</citerefentry>, <citerefentry>
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<refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum>
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</citerefentry></para>
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</refsect1>
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</refentry>
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