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128 lines
4.4 KiB
XML
128 lines
4.4 KiB
XML
<?xml version='1.0'?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
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<refentry id="udev.conf"
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xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>udev.conf</title>
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<productname>systemd</productname>
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</refentryinfo>
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<refmeta>
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<refentrytitle>udev.conf</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>udev.conf</refname>
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<refpurpose>Configuration for device event managing daemon</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>/etc/udev/udev.conf</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>
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<citerefentry><refentrytitle>systemd-udevd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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expects its main configuration file at
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<filename>/etc/udev/udev.conf</filename>. It consists of a set
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of variables allowing the user to override default udev
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values. All empty lines or lines beginning with '#' are
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ignored. The following variables can be set:
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</para>
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<variablelist class='config-directives'>
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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>The log level. Valid values are the numerical
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syslog priorities or their textual representations:
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<option>err</option>, <option>info</option> and
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<option>debug</option>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>children_max=</varname></term>
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<listitem>
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<para>An integer. The maximum number of events executed in parallel.</para>
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<para>This is the same as the <option>--children-max=</option> option.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>exec_delay=</varname></term>
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<listitem>
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<para>An integer. Delay the execution of <varname>RUN</varname>
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instructions by the given number of seconds. This option
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might be useful when debugging system crashes during
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coldplug caused by loading non-working kernel
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modules.</para>
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<para>This is the same as the <option>--exec-delay=</option> option.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>event_timeout=</varname></term>
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<listitem>
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<para>An integer. The number of seconds to wait for events to finish. After
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this time, the event will be terminated. The default is 180 seconds.</para>
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<para>This is the same as the <option>--event-timeout=</option> option.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>resolve_names=</varname></term>
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<listitem>
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<para>Specifies when systemd-udevd should resolve names of users and groups. When set to
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<option>early</option> (the default), names will be resolved when the rules are parsed.
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When set to <option>late</option>, names will be resolved for every event. When set to
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<option>never</option>, names will never be resolved and all devices will be owned by
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root.</para>
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<para>This is the same as the <option>--resolve-names=</option> option.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>timeout_signal=</varname></term>
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<listitem>
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<para>Specifies a signal that <filename>systemd-udevd</filename> will send on worker
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timeouts. Note that both workers and spawned processes will be killed using this
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signal. Defaults to <option>SIGKILL</option>.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>
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In addition, <filename>systemd-udevd</filename> can be configured
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by command line options and the kernel command line (see
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<citerefentry><refentrytitle>systemd-udevd</refentrytitle><manvolnum>8</manvolnum></citerefentry>).
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</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd-udevd</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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