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6fc5a404 | 1 | <?xml version='1.0'?> |
3a54a157 | 2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" |
eea10b26 | 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> |
db9ecf05 | 4 | <!-- SPDX-License-Identifier: LGPL-2.1-or-later --> |
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5 | |
6 | <refentry id="udev.conf" | |
7 | xmlns:xi="http://www.w3.org/2001/XInclude"> | |
8 | ||
9 | <refentryinfo> | |
10 | <title>udev.conf</title> | |
11 | <productname>systemd</productname> | |
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12 | </refentryinfo> |
13 | ||
14 | <refmeta> | |
15 | <refentrytitle>udev.conf</refentrytitle> | |
16 | <manvolnum>5</manvolnum> | |
17 | </refmeta> | |
18 | ||
19 | <refnamediv> | |
20 | <refname>udev.conf</refname> | |
21 | <refpurpose>Configuration for device event managing daemon</refpurpose> | |
22 | </refnamediv> | |
23 | ||
24 | <refsynopsisdiv> | |
25 | <para><filename>/etc/udev/udev.conf</filename></para> | |
26 | </refsynopsisdiv> | |
27 | ||
28 | <refsect1> | |
29 | <title>Description</title> | |
30 | ||
31 | <para> | |
32 | <citerefentry><refentrytitle>systemd-udevd</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
33 | expects its main configuration file at | |
34 | <filename>/etc/udev/udev.conf</filename>. It consists of a set | |
35 | of variables allowing the user to override default udev | |
36 | values. All empty lines or lines beginning with '#' are | |
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37 | ignored. The following variables can be set: |
38 | </para> | |
39 | ||
d2acdcc6 | 40 | <variablelist class='config-directives'> |
203af57f | 41 | <varlistentry> |
4b3ca79e | 42 | <term><varname>udev_log=</varname></term> |
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43 | |
44 | <listitem> | |
f47ad593 | 45 | <para>The log level. Valid values are the numerical |
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46 | syslog priorities or their textual representations: |
47 | <option>err</option>, <option>info</option> and | |
48 | <option>debug</option>.</para> | |
ec07c3c8 | 49 | |
aefdc112 | 50 | <xi:include href="version-info.xml" xpointer="v216"/> |
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51 | </listitem> |
52 | </varlistentry> | |
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53 | |
54 | <varlistentry> | |
55 | <term><varname>children_max=</varname></term> | |
56 | ||
57 | <listitem> | |
7b5ca134 YW |
58 | <para>An integer. The maximum number of events executed in parallel. When unspecified or 0 is |
59 | specified, the maximum is determined based on the system resources.</para> | |
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60 | |
61 | <para>This is the same as the <option>--children-max=</option> option.</para> | |
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62 | |
63 | <xi:include href="version-info.xml" xpointer="v240"/> | |
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64 | </listitem> |
65 | </varlistentry> | |
66 | ||
67 | <varlistentry> | |
68 | <term><varname>exec_delay=</varname></term> | |
69 | ||
70 | <listitem> | |
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71 | <para>An integer. Delay the execution of each <varname>RUN{<replaceable>program</replaceable>}</varname> |
72 | parameter by the given number of seconds. This option | |
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73 | might be useful when debugging system crashes during |
74 | coldplug caused by loading non-working kernel | |
75 | modules.</para> | |
76 | ||
77 | <para>This is the same as the <option>--exec-delay=</option> option.</para> | |
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78 | |
79 | <xi:include href="version-info.xml" xpointer="v240"/> | |
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80 | </listitem> |
81 | </varlistentry> | |
82 | ||
83 | <varlistentry> | |
84 | <term><varname>event_timeout=</varname></term> | |
85 | ||
86 | <listitem> | |
87 | <para>An integer. The number of seconds to wait for events to finish. After | |
88 | this time, the event will be terminated. The default is 180 seconds.</para> | |
89 | ||
90 | <para>This is the same as the <option>--event-timeout=</option> option.</para> | |
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91 | |
92 | <xi:include href="version-info.xml" xpointer="v240"/> | |
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93 | </listitem> |
94 | </varlistentry> | |
95 | ||
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96 | <varlistentry> |
97 | <term><varname>resolve_names=</varname></term> | |
98 | ||
99 | <listitem> | |
5e2b0e1c | 100 | <para>Specifies when systemd-udevd should resolve names of users and groups. When set to |
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101 | <option>early</option> (the default), names will be resolved when the rules are parsed. |
102 | When set to <option>late</option>, names will be resolved for every event. When set to | |
103 | <option>never</option>, names will never be resolved and all devices will be owned by | |
104 | root.</para> | |
105 | ||
106 | <para>This is the same as the <option>--resolve-names=</option> option.</para> | |
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107 | |
108 | <xi:include href="version-info.xml" xpointer="v240"/> | |
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109 | </listitem> |
110 | </varlistentry> | |
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111 | |
112 | <varlistentry> | |
113 | <term><varname>timeout_signal=</varname></term> | |
114 | ||
115 | <listitem> | |
116 | <para>Specifies a signal that <filename>systemd-udevd</filename> will send on worker | |
117 | timeouts. Note that both workers and spawned processes will be killed using this | |
118 | signal. Defaults to <option>SIGKILL</option>.</para> | |
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119 | |
120 | <xi:include href="version-info.xml" xpointer="v246"/> | |
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121 | </listitem> |
122 | </varlistentry> | |
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123 | </variablelist> |
124 | ||
125 | <para> | |
126 | In addition, <filename>systemd-udevd</filename> can be configured | |
81c7dd89 | 127 | by command line options and the kernel command line (see |
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128 | <citerefentry><refentrytitle>systemd-udevd</refentrytitle><manvolnum>8</manvolnum></citerefentry>). |
129 | </para> | |
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130 | </refsect1> |
131 | ||
132 | <refsect1> | |
133 | <title>See Also</title> | |
13a69c12 DT |
134 | <para><simplelist type="inline"> |
135 | <member><citerefentry><refentrytitle>systemd-udevd</refentrytitle><manvolnum>8</manvolnum></citerefentry></member> | |
136 | <member><citerefentry><refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum></citerefentry></member> | |
137 | <member><citerefentry><refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum></citerefentry></member> | |
138 | </simplelist></para> | |
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139 | </refsect1> |
140 | </refentry> |