[519ee45] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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| 7 |
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| 8 | <sect1 id="ch-system-udev" role="wrap">
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| 9 | <?dbhtml filename="udev.html"?>
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| 10 |
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| 11 | <title>Udev-&udev-version;</title>
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| 12 |
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| 13 | <indexterm zone="ch-system-udev">
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| 14 | <primary sortas="a-Udev">Udev</primary>
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| 15 | </indexterm>
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| 16 |
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| 17 | <sect2 role="package">
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| 18 | <title/>
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| 19 |
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| 20 | <para>The Udev package contains programs for dynamic creation of device
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| 21 | nodes.</para>
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| 22 |
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| 23 | <segmentedlist>
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| 24 | <segtitle>&buildtime;</segtitle>
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| 25 | <segtitle>&diskspace;</segtitle>
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| 26 |
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| 27 | <seglistitem>
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| 28 | <seg>&udev-ch6-sbu;</seg>
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| 29 | <seg>&udev-ch6-du;</seg>
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| 30 | </seglistitem>
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| 31 | </segmentedlist>
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| 32 |
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| 33 | </sect2>
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| 34 |
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| 35 | <sect2 role="installation">
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| 36 | <title>Installation of Udev</title>
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| 37 |
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| 38 | <para>The udev-config tarball contains LFS-specific files used to configure
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[a76cbca] | 39 | Udev. Unpack it into the Udev source directory:</para>
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[519ee45] | 40 |
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| 41 | <screen><userinput>tar xf ../&udev-config;.tar.bz2</userinput></screen>
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| 42 |
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| 43 | <para>Create some devices and directories that Udev cannot handle due to
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| 44 | them being required very early in the boot process:</para>
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| 45 |
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| 46 | <screen><userinput>install -dv /lib/{firmware,udev/devices/{pts,shm}}
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| 47 | mknod -m0666 /lib/udev/devices/null c 1 3
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| 48 | ln -sv /proc/self/fd /lib/udev/devices/fd
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| 49 | ln -sv /proc/self/fd/0 /lib/udev/devices/stdin
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| 50 | ln -sv /proc/self/fd/1 /lib/udev/devices/stdout
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| 51 | ln -sv /proc/self/fd/2 /lib/udev/devices/stderr
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| 52 | ln -sv /proc/kcore /lib/udev/devices/core</userinput></screen>
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| 53 |
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| 54 | <para>Compile the package:</para>
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| 55 |
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| 56 | <screen><userinput>make EXTRAS="extras/ata_id extras/cdrom_id extras/edd_id \
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| 57 | extras/firmware extras/floppy extras/path_id \
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| 58 | extras/scsi_id extras/usb_id extras/volume_id"</userinput></screen>
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| 59 |
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| 60 | <variablelist>
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| 61 | <title>The meaning of the make option:</title>
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| 62 |
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| 63 | <varlistentry>
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| 64 | <term><parameter>EXTRAS=...</parameter></term>
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| 65 | <listitem>
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| 66 | <para>This builds several helper binaries that can aid in writing custom
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| 67 | Udev rules.</para>
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| 68 | </listitem>
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| 69 | </varlistentry>
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| 70 |
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| 71 | </variablelist>
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| 72 |
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| 73 | <para>To test the results, issue:
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| 74 | <userinput>make test</userinput>.</para>
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| 75 |
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| 76 | <para>Install the package:</para>
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| 77 |
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| 78 | <screen><userinput>make DESTDIR=/ \
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| 79 | EXTRAS="extras/ata_id extras/cdrom_id extras/edd_id \
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| 80 | extras/firmware extras/floppy extras/path_id \
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| 81 | extras/scsi_id extras/usb_id extras/volume_id" install</userinput></screen>
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| 82 |
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| 83 | <variablelist>
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| 84 | <title>The meaning of the make parameter:</title>
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| 85 |
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| 86 | <varlistentry>
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| 87 | <term><parameter>DESTDIR=/</parameter></term>
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| 88 | <listitem>
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| 89 | <para>This prevents the Udev build process from killing any
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| 90 | <command>udevd</command> processes that may be running on the
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| 91 | host system.</para>
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| 92 | </listitem>
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| 93 | </varlistentry>
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| 94 |
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| 95 | </variablelist>
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| 96 |
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| 97 | <para>Udev has to be configured in order to work properly, as it does
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| 98 | not install any configuration files by default. Install the
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| 99 | LFS-specific configuration files:</para>
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| 100 |
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| 101 | <screen><userinput>cp -v &udev-config;/[0-9]* /etc/udev/rules.d/</userinput></screen>
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| 102 |
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| 103 | <para>Install the documentation that explains how to create Udev rules:</para>
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| 104 |
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| 105 | <screen><userinput>install -m644 -D -v docs/writing_udev_rules/index.html \
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| 106 | /usr/share/doc/udev-&udev-version;/index.html</userinput></screen>
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| 107 |
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| 108 | </sect2>
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| 109 |
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| 110 | <sect2 id="contents-udev" role="content">
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| 111 | <title>Contents of Udev</title>
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| 112 |
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| 113 | <segmentedlist>
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| 114 | <segtitle>Installed programs</segtitle>
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| 115 | <segtitle>Installed directory</segtitle>
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| 116 |
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| 117 | <seglistitem>
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| 118 | <seg>ata_id, cdrom_id, create_floppy_devices, edd_id, firmware_helper,
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| 119 | path_id, scsi_id, udevcontrol, udevd, udevinfo, udevmonitor, udevsettle,
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| 120 | udevtest, udevtrigger, usb_id, vol_id, and write_cd_aliases</seg>
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| 121 | <seg>/etc/udev</seg>
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| 122 | </seglistitem>
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| 123 | </segmentedlist>
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| 124 |
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| 125 | <variablelist>
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| 126 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 127 | <?dbfo list-presentation="list"?>
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| 128 | <?dbhtml list-presentation="table"?>
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| 129 |
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| 130 | <varlistentry id="ata_id">
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| 131 | <term><command>ata_id</command></term>
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| 132 | <listitem>
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| 133 | <para>Provides Udev with a unique string and
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| 134 | additional information (uuid, label) for an ATA drive</para>
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| 135 | <indexterm zone="ch-system-udev ata_id">
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| 136 | <primary sortas="b-ata_id">ata_id</primary>
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| 137 | </indexterm>
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| 138 | </listitem>
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| 139 | </varlistentry>
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| 140 |
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| 141 | <varlistentry id="cdrom_id">
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| 142 | <term><command>cdrom_id</command></term>
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| 143 | <listitem>
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| 144 | <para>Provides Udev with the capabilities of a
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| 145 | CD-ROM or DVD-ROM drive</para>
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| 146 | <indexterm zone="ch-system-udev cdrom_id">
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| 147 | <primary sortas="b-cdrom_id">cdrom_id</primary>
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| 148 | </indexterm>
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| 149 | </listitem>
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| 150 | </varlistentry>
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| 151 |
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| 152 | <varlistentry id="create_floppy_devices">
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| 153 | <term><command>create_floppy_devices</command></term>
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| 154 | <listitem>
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| 155 | <para>Creates all possible floppy devices based on the CMOS type</para>
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| 156 | <indexterm zone="ch-system-udev create_floppy_devices">
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| 157 | <primary sortas="b-create_floppy_devices">create_floppy_devices</primary>
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| 158 | </indexterm>
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| 159 | </listitem>
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| 160 | </varlistentry>
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| 161 |
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| 162 | <varlistentry id="edd_id">
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| 163 | <term><command>edd_id</command></term>
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| 164 | <listitem>
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| 165 | <para>Provides Udev with the EDD ID for a BIOS disk drive</para>
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| 166 | <indexterm zone="ch-system-udev edd_id">
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| 167 | <primary sortas="b-edd_id">edd_id</primary>
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| 168 | </indexterm>
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| 169 | </listitem>
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| 170 | </varlistentry>
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| 171 |
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| 172 | <varlistentry id="firmware_helper">
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| 173 | <term><command>firmware_helper</command></term>
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| 174 | <listitem>
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| 175 | <para>Uploads firmware to devices</para>
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| 176 | <indexterm zone="ch-system-udev firmware_helper">
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| 177 | <primary sortas="b-firmware_helper">firmware_helper</primary>
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| 178 | </indexterm>
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| 179 | </listitem>
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| 180 | </varlistentry>
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| 181 |
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| 182 | <varlistentry id="path_id">
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| 183 | <term><command>path_id</command></term>
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| 184 | <listitem>
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| 185 | <para>Provide the shortest possible unique hardware path to a
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| 186 | device</para>
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| 187 | <indexterm zone="ch-system-udev path_id">
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| 188 | <primary sortas="b-path_id">path_id</primary>
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| 189 | </indexterm>
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| 190 | </listitem>
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| 191 | </varlistentry>
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| 192 |
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| 193 | <varlistentry id="scsi_id">
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| 194 | <term><command>scsi_id</command></term>
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| 195 | <listitem>
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| 196 | <para>Provides Udev with a unique SCSI identifier
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| 197 | based on the data returned from sending a SCSI INQUIRY command to
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| 198 | the specified device</para>
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| 199 | <indexterm zone="ch-system-udev scsi_id">
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| 200 | <primary sortas="b-scsi_id">scsi_id</primary>
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| 201 | </indexterm>
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| 202 | </listitem>
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| 203 | </varlistentry>
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| 204 |
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| 205 | <varlistentry id="udevcontrol">
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| 206 | <term><command>udevcontrol</command></term>
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| 207 | <listitem>
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| 208 | <para>Configures a number of options for the running
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| 209 | <command>udevd</command> daemon, such as the log level.</para>
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| 210 | <indexterm zone="ch-system-udev udevcontrol">
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| 211 | <primary sortas="b-udevcontrol">udevcontrol</primary>
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| 212 | </indexterm>
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| 213 | </listitem>
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| 214 | </varlistentry>
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| 215 |
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| 216 | <varlistentry id="udevd">
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| 217 | <term><command>udevd</command></term>
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| 218 | <listitem>
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| 219 | <para>A daemon that listens for uevents on the netlink socket,
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| 220 | creates devices and runs the configured external programs in
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| 221 | response to these uevents</para>
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| 222 | <indexterm zone="ch-system-udev udevd">
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| 223 | <primary sortas="b-udevd">udevd</primary>
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| 224 | </indexterm>
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| 225 | </listitem>
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| 226 | </varlistentry>
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| 227 |
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| 228 | <varlistentry id="udevinfo">
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| 229 | <term><command>udevinfo</command></term>
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| 230 | <listitem>
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| 231 | <para>Allows users to query the Udev database for
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| 232 | information on any device currently present on the system; it also
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| 233 | provides a way to query any device in the <systemitem
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| 234 | class="filesystem">sysfs</systemitem> tree to help create udev
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| 235 | rules</para>
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| 236 | <indexterm zone="ch-system-udev udevinfo">
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| 237 | <primary sortas="b-udevinfo">udevinfo</primary>
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| 238 | </indexterm>
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| 239 | </listitem>
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| 240 | </varlistentry>
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| 241 |
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| 242 | <varlistentry id="udevmonitor">
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| 243 | <term><command>udevmonitor</command></term>
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| 244 | <listitem>
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| 245 | <para>Prints the event received from the kernel and the environment
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| 246 | which Udev sends out after rule processing</para>
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| 247 | <indexterm zone="ch-system-udev udevmonitor">
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| 248 | <primary sortas="b-udevmonitor">udevmonitor</primary>
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| 249 | </indexterm>
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| 250 | </listitem>
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| 251 | </varlistentry>
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| 252 |
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| 253 | <varlistentry id="udevsettle">
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| 254 | <term><command>udevsettle</command></term>
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| 255 | <listitem>
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| 256 | <para>Watches the Udev event queue and exits if all current uevents
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| 257 | have been handled</para>
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| 258 | <indexterm zone="ch-system-udev udevsettle">
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| 259 | <primary sortas="b-udevsettle">udevsettle</primary>
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| 260 | </indexterm>
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| 261 | </listitem>
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| 262 | </varlistentry>
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| 263 |
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| 264 | <varlistentry id="udevtest">
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| 265 | <term><command>udevtest</command></term>
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| 266 | <listitem>
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| 267 | <para>Simulates a uevent for the given device, and prints out the
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| 268 | name of the node the real <command>udevd</command> would have created,
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| 269 | or the name of the renamed network interface</para>
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| 270 | <indexterm zone="ch-system-udev udevtest">
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| 271 | <primary sortas="b-udevtest">udevtest</primary>
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| 272 | </indexterm>
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| 273 | </listitem>
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| 274 | </varlistentry>
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| 275 |
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| 276 | <varlistentry id="udevtrigger">
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| 277 | <term><command>udevtrigger</command></term>
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| 278 | <listitem>
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| 279 | <para>Triggers kernel device uevents to be replayed</para>
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| 280 | <indexterm zone="ch-system-udev udevtrigger">
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| 281 | <primary sortas="b-udevtrigger">udevtrigger</primary>
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| 282 | </indexterm>
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| 283 | </listitem>
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| 284 | </varlistentry>
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| 285 |
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| 286 | <varlistentry id="usb_id">
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| 287 | <term><command>usb_id</command></term>
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| 288 | <listitem>
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| 289 | <para>Provides Udev with information about USB
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| 290 | devices</para>
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| 291 | <indexterm zone="ch-system-udev usb_id">
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| 292 | <primary sortas="b-usb_id">usb_id</primary>
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| 293 | </indexterm>
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| 294 | </listitem>
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| 295 | </varlistentry>
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| 296 |
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| 297 | <varlistentry id="vol_id">
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| 298 | <term><command>vol_id</command></term>
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| 299 | <listitem>
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| 300 | <para>Provides Udev with the label and uuid of a
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| 301 | filesystem</para>
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| 302 | <indexterm zone="ch-system-udev vol_id">
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| 303 | <primary sortas="b-vol_id">vol_id</primary>
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| 304 | </indexterm>
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| 305 | </listitem>
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| 306 | </varlistentry>
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| 307 |
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| 308 | <varlistentry id="etc-udev">
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| 309 | <term><filename class="directory">/etc/udev</filename></term>
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| 310 | <listitem>
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| 311 | <para>Contains Udev configuation files,
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| 312 | device permissions, and rules for device naming</para>
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| 313 | <indexterm zone="ch-system-udev etc-udev">
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| 314 | <primary sortas="e-/etc/udev">/etc/udev</primary>
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| 315 | </indexterm>
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| 316 | </listitem>
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| 317 | </varlistentry>
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| 318 |
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| 319 | </variablelist>
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| 320 |
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| 321 | </sect2>
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| 322 |
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| 323 | </sect1>
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