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420a506e | 1 | <?xml version='1.0'?> |
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2 | <?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?> |
3 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
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4 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
5 | ||
f13b388f | 6 | <refentry id="systemd-udevd"> |
63749b1a | 7 | <refentryinfo> |
3c52e8d8 | 8 | <title>udevd</title> |
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9 | <productname>systemd</productname> |
10 | <authorgroup> | |
11 | <author> | |
12 | <contrib>Developer</contrib> | |
13 | <firstname>Kay</firstname> | |
14 | <surname>Sievers</surname> | |
15 | <email>kay@vrfy.org</email> | |
16 | </author> | |
17 | </authorgroup> | |
63749b1a | 18 | </refentryinfo> |
420a506e | 19 | |
63749b1a | 20 | <refmeta> |
f13b388f | 21 | <refentrytitle>systemd-udevd</refentrytitle> |
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22 | <manvolnum>8</manvolnum> |
23 | <refmiscinfo class="version"></refmiscinfo> | |
24 | </refmeta> | |
420a506e | 25 | |
63749b1a | 26 | <refnamediv> |
f13b388f | 27 | <refname>systemd-udevd</refname><refpurpose>event managing daemon</refpurpose> |
63749b1a | 28 | </refnamediv> |
420a506e | 29 | |
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30 | <refsynopsisdiv> |
31 | <cmdsynopsis> | |
f13b388f | 32 | <command>systemd-udevd</command> |
63749b1a | 33 | <arg><option>--daemon</option></arg> |
63749b1a | 34 | <arg><option>--debug</option></arg> |
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35 | <arg><option>--children-max=</option></arg> |
36 | <arg><option>--exec-delay=</option></arg> | |
63749b1a | 37 | <arg><option>--resolve-names=early|late|never</option></arg> |
9fa68615 | 38 | <arg><option>--version</option></arg> |
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39 | <arg><option>--help</option></arg> |
40 | </cmdsynopsis> | |
41 | </refsynopsisdiv> | |
420a506e | 42 | |
63749b1a | 43 | <refsect1><title>Description</title> |
f13b388f | 44 | <para>systemd-udevd listens to kernel uevents. For every event, systemd-udevd executes matching |
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45 | instructions specified in udev rules. See <citerefentry> |
46 | <refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum> | |
47 | </citerefentry>.</para> | |
b130944f | 48 | <para>The behavior of the running daemon can be changed with |
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49 | <command>udevadm control</command>.</para> |
50 | </refsect1> | |
420a506e | 51 | |
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52 | <refsect1><title>Options</title> |
53 | <variablelist> | |
54 | <varlistentry> | |
55 | <term><option>--daemon</option></term> | |
56 | <listitem> | |
57 | <para>Detach and run in the background.</para> | |
58 | </listitem> | |
59 | </varlistentry> | |
60 | <varlistentry> | |
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61 | <term><option>--debug</option></term> |
62 | <listitem> | |
63 | <para>Print debug messages to stderr.</para> | |
64 | </listitem> | |
65 | </varlistentry> | |
66 | <varlistentry> | |
67 | <term><option>--children-max=</option></term> | |
63749b1a | 68 | <listitem> |
8f7f1a2b | 69 | <para>Limit the number of parallel executed events.</para> |
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70 | </listitem> |
71 | </varlistentry> | |
72 | <varlistentry> | |
9fa68615 | 73 | <term><option>--exec-delay=</option></term> |
63749b1a | 74 | <listitem> |
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75 | <para>Number of seconds to delay the execution of RUN instructions. |
76 | This might be useful when debugging system crashes during coldplug | |
77 | cause by loading non-working kernel modules.</para> | |
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78 | </listitem> |
79 | </varlistentry> | |
80 | <varlistentry> | |
9fa68615 | 81 | <term><option>--resolve-names=</option></term> |
63749b1a | 82 | <listitem> |
f13b388f | 83 | <para>Specify when systemd-udevd should resolve names of users and groups. |
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84 | When set to <option>early</option> (the default) names will be |
85 | resolved when the rules are parsed. When set to | |
86 | <option>late</option> names will be resolved for every event. | |
87 | When set to <option>never</option> names will never be resolved | |
88 | and all devices will be owned by root.</para> | |
89 | </listitem> | |
90 | </varlistentry> | |
91 | <varlistentry> | |
92 | <term><option>--version</option></term> | |
93 | <listitem> | |
94 | <para>Print version number.</para> | |
95 | </listitem> | |
96 | </varlistentry> | |
97 | <varlistentry> | |
98 | <term><option>--help</option></term> | |
99 | <listitem> | |
100 | <para>Print help text.</para> | |
101 | </listitem> | |
102 | </varlistentry> | |
103 | </variablelist> | |
104 | </refsect1> | |
420a506e | 105 | |
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106 | <refsect1><title>Environment</title> |
107 | <variablelist> | |
108 | <varlistentry> | |
8f7f1a2b | 109 | <term><varname>UDEV_LOG=</varname></term> |
63749b1a | 110 | <listitem> |
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111 | <para>Set the logging priority.</para> |
112 | </listitem> | |
113 | </varlistentry> | |
114 | </variablelist> | |
115 | </refsect1> | |
116 | ||
117 | <refsect1><title>Kernel command line</title> | |
118 | <variablelist> | |
119 | <varlistentry> | |
120 | <term><varname>udev.log-priority=</varname></term> | |
121 | <listitem> | |
122 | <para>Set the logging priority.</para> | |
123 | </listitem> | |
124 | </varlistentry> | |
125 | <varlistentry> | |
126 | <term><varname>udev.children-max=</varname></term> | |
127 | <listitem> | |
128 | <para>Limit the number of parallel executed events.</para> | |
129 | </listitem> | |
130 | </varlistentry> | |
131 | <varlistentry> | |
132 | <term><varname>udev.exec-delay=</varname></term> | |
133 | <listitem> | |
134 | <para>Number of seconds to delay the execution of RUN instructions. | |
135 | This might be useful when debugging system crashes during coldplug | |
136 | cause by loading non-working kernel modules.</para> | |
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137 | </listitem> |
138 | </varlistentry> | |
139 | </variablelist> | |
140 | </refsect1> | |
7b86ada7 | 141 | |
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142 | <refsect1> |
143 | <title>See Also</title> | |
144 | <para><citerefentry> | |
145 | <refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum> | |
8f7f1a2b | 146 | </citerefentry>, <citerefentry> |
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147 | <refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum> |
148 | </citerefentry></para> | |
149 | </refsect1> | |
150 | </refentry> |