[9dfc02f] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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| 3 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 4 | %general-entities;
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| 5 | ]>
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[a001133] | 6 | <sect1 id="ch-system-udev" role="wrap">
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[9dfc02f] | 7 | <title>Udev-&udev-version;</title>
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| 8 | <?dbhtml filename="udev.html"?>
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| 9 |
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[a001133] | 10 | <indexterm zone="ch-system-udev"><primary sortas="a-Udev">Udev</primary></indexterm>
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[9dfc02f] | 11 |
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[a001133] | 12 | <sect2 role="package"><title/>
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[32324418] | 13 | <para>The Udev package contains programs for dynamic creation of device nodes.</para>
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[9dfc02f] | 14 |
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[a001133] | 15 | <segmentedlist>
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| 16 | <segtitle>&buildtime;</segtitle>
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| 17 | <segtitle>&diskspace;</segtitle>
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| 18 | <seglistitem><seg>0.2 SBU</seg><seg>5.2 MB</seg></seglistitem>
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| 19 | </segmentedlist>
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[9dfc02f] | 20 |
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[ef13657] | 21 | <segmentedlist>
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| 22 | <segtitle>Udev installation depends on</segtitle>
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[69993f4] | 23 | <seglistitem><seg>Coreutils and Make</seg></seglistitem>
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[ef13657] | 24 | </segmentedlist>
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| 25 |
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[a001133] | 26 | </sect2>
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| 27 |
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| 28 | <sect2 role="installation">
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[9dfc02f] | 29 | <title>Installation of Udev</title>
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| 30 |
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[2256873] | 31 | <para>Compile the package:</para>
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[9dfc02f] | 32 |
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| 33 | <screen><userinput>make udevdir=/dev</userinput></screen>
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| 34 |
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[15afe874] | 35 | <variablelist>
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| 36 | <varlistentry>
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| 37 | <term><parameter>udevdir=/dev</parameter></term>
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[ef13657] | 38 | <listitem><para>This tells <command>udev</command> in which directory
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| 39 | devices nodes are to be created.</para></listitem>
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[15afe874] | 40 | </varlistentry>
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| 41 | </variablelist>
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| 42 |
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[0cb7f8b] | 43 | <para>This package does not come with a test suite.</para>
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| 44 |
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[ef13657] | 45 | <para>Install the package:</para>
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[9dfc02f] | 46 |
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| 47 | <screen><userinput>make udevdir=/dev install</userinput></screen>
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| 48 |
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[69993f4] | 49 | <para>Udev's configuration is far from ideal by default, so install
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| 50 | the configuration files here:</para>
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[18da154] | 51 |
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[00cc7ce] | 52 | <screen><userinput>cp ../udev-config-2.permissions \
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| 53 | /etc/udev/permissions.d/25-lfs.permissions
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[3d17ed6] | 54 | cp ../udev-config-1.rules /etc/udev/rules.d/25-lfs.rules</userinput></screen>
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[18da154] | 55 |
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[407d336] | 56 | <!-- Edit Me -->
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| 57 | <para>Run the <command>udevstart</command> program to create our full
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| 58 | compliment of device nodes.</para>
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| 59 |
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| 60 | <screen><userinput>/sbin/udevstart</userinput></screen>
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| 61 |
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[9dfc02f] | 62 | </sect2>
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| 63 |
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[c6cb3aa] | 64 | <sect2 id="contents-udev" role="content"><title>Contents of Udev</title>
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[9dfc02f] | 65 |
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[32324418] | 66 | <segmentedlist>
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| 67 | <segtitle>Installed programs</segtitle>
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[2256873] | 68 | <segtitle>Installed directory</segtitle>
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| 69 | <seglistitem><seg>udev, udevd, udevsend, udevstart, udevinfo, and udevtest</seg>
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| 70 | <seg>/etc/udev</seg></seglistitem>
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[32324418] | 71 | </segmentedlist>
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| 72 |
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[2256873] | 73 | <variablelist><bridgehead renderas="sect3">Short Descriptions</bridgehead>
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[3ed279f] | 74 | <?dbfo list-presentation="list"?>
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[32324418] | 75 |
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| 76 | <varlistentry id="udev">
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| 77 | <term><command>udev</command></term>
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[3ed279f] | 78 | <listitem>
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[853917c] | 79 | <para>Creates device nodes in <filename
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[69993f4] | 80 | class="directory">/dev</filename> or renames network interfaces (not
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[2256873] | 81 | in LFS) in response to hotplug events</para>
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[3ed279f] | 82 | <indexterm zone="ch-system-udev udev"><primary sortas="b-udev">udev</primary></indexterm>
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[8eeb6bc] | 83 | <beginpage/></listitem></varlistentry>
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[32324418] | 84 |
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| 85 | <varlistentry id="udevd">
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| 86 | <term><command>udevd</command></term>
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[3ed279f] | 87 | <listitem>
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[853917c] | 88 | <para>A daemon that reorders hotplug events before submitting them to
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[32324418] | 89 | <command>udev</command>,
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[2256873] | 90 | thus avoiding various race conditions</para>
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[3ed279f] | 91 | <indexterm zone="ch-system-udev udevd"><primary sortas="b-udevd">udevd</primary></indexterm>
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[32324418] | 92 | </listitem></varlistentry>
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| 93 |
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| 94 | <varlistentry id="udevsend">
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| 95 | <term><command>udevsend</command></term>
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[3ed279f] | 96 | <listitem>
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[853917c] | 97 | <para>Delivers hotplug events to <command>udevd</command></para>
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[3ed279f] | 98 | <indexterm zone="ch-system-udev udevsend"><primary sortas="b-udevsend">udevsend</primary></indexterm>
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[32324418] | 99 | </listitem></varlistentry>
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| 100 |
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| 101 | <varlistentry id="udevstart">
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| 102 | <term><command>udevstart</command></term>
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[3ed279f] | 103 | <listitem>
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[853917c] | 104 | <para>Creates device nodes in <filename
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[32324418] | 105 | class="directory">/dev</filename> that correspond to drivers compiled directly
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[2256873] | 106 | into the kernel; it performs that task by simulating hotplug events presumably
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[69993f4] | 107 | dropped by the kernel before invocation of this program (e.g., because the root
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[32324418] | 108 | filesystem has not been mounted) and submitting such synthetic hotplug events
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[2256873] | 109 | to <command>udev</command></para>
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[3ed279f] | 110 | <indexterm zone="ch-system-udev udevstart"><primary sortas="b-udevstart">udevstart</primary></indexterm>
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[32324418] | 111 | </listitem>
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| 112 | </varlistentry>
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| 113 |
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| 114 | <varlistentry id="udevinfo">
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| 115 | <term><command>udevinfo</command></term>
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[3ed279f] | 116 | <listitem>
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[853917c] | 117 | <para>Allows users to query the <command>udev</command> database for
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[2256873] | 118 | information on any device currently present on the system; it also
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[ef13657] | 119 | provides a way to query any device in the <systemitem
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[69993f4] | 120 | class="filesystem">sysfs</systemitem> tree to help create udev
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[2256873] | 121 | rules</para>
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[3ed279f] | 122 | <indexterm zone="ch-system-udev udevinfo"><primary sortas="b-udevinfo">udevinfo</primary></indexterm>
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[32324418] | 123 | </listitem></varlistentry>
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| 124 |
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| 125 | <varlistentry id="udevtest">
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| 126 | <term><command>udevtest</command></term>
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[3ed279f] | 127 | <listitem>
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[853917c] | 128 | <para>Simulates a <command>udev</command> run for the given device,
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[32324418] | 129 | and prints out the name of the node the real <command>udev</command> would
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[2256873] | 130 | have created or (not in LFS) the name of the renamed network interface</para>
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[3ed279f] | 131 | <indexterm zone="ch-system-udev udevtest"><primary sortas="b-udevtest">udevtest</primary></indexterm>
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[32324418] | 132 | </listitem></varlistentry>
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| 133 |
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| 134 | <varlistentry id="etc-udev">
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| 135 | <term><filename class="directory">/etc/udev</filename></term>
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[3ed279f] | 136 | <listitem>
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[853917c] | 137 | <para>Contains <command>udev</command> configuation files,
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[2256873] | 138 | device permissions, and rules for device naming</para>
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[3ed279f] | 139 | <indexterm zone="ch-system-udev etc-udev"><primary sortas="e-etc-udev">/etc/udev</primary></indexterm>
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[32324418] | 140 | </listitem></varlistentry>
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| 141 | </variablelist>
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| 142 | </sect2>
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[9dfc02f] | 143 |
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| 144 | </sect1>
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[ef13657] | 145 |
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