[f896e21c] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
|
---|
| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
---|
| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
|
---|
| 4 | <!ENTITY % general-entities SYSTEM "../general.ent">
|
---|
| 5 | %general-entities;
|
---|
| 6 | ]>
|
---|
| 7 |
|
---|
| 8 | <sect1 id="ch-system-udev" role="wrap">
|
---|
| 9 | <?dbhtml filename="udev.html"?>
|
---|
| 10 |
|
---|
| 11 | <sect1info condition="script">
|
---|
| 12 | <productname>udev</productname>
|
---|
| 13 | <productnumber>&systemd-version;</productnumber>
|
---|
| 14 | <address>&systemd-url;</address>
|
---|
| 15 | </sect1info>
|
---|
| 16 |
|
---|
| 17 | <title>Udev-&systemd-version; (Extracted from systemd-&systemd-version;)</title>
|
---|
| 18 |
|
---|
| 19 | <indexterm zone="ch-system-udev">
|
---|
| 20 | <primary sortas="a-Udev">Udev</primary>
|
---|
| 21 | </indexterm>
|
---|
| 22 |
|
---|
| 23 | <sect2 role="package">
|
---|
| 24 | <title/>
|
---|
| 25 |
|
---|
| 26 | <para>The Udev package contains programs for dynamic creation of device
|
---|
| 27 | nodes. The development of udev has been merged with systemd, but
|
---|
[2ca8941] | 28 | most of systemd is incompatible with LFS. Here we build and install just
|
---|
[f896e21c] | 29 | the needed udev files.</para>
|
---|
| 30 |
|
---|
| 31 | <segmentedlist>
|
---|
| 32 | <segtitle>&buildtime;</segtitle>
|
---|
| 33 | <segtitle>&diskspace;</segtitle>
|
---|
| 34 |
|
---|
| 35 | <seglistitem>
|
---|
| 36 | <seg>&systemd-ch6-sbu;</seg>
|
---|
| 37 | <seg>&systemd-ch6-du;</seg>
|
---|
| 38 | </seglistitem>
|
---|
| 39 | </segmentedlist>
|
---|
| 40 | </sect2>
|
---|
| 41 |
|
---|
| 42 | <sect2 role="installation">
|
---|
| 43 | <title>Installation of Udev</title>
|
---|
| 44 |
|
---|
[d7f2eb0] | 45 | <note><para>This package is a little different from other packages. The
|
---|
| 46 | initial package that is extracted is
|
---|
[2ca8941] | 47 | <filename>systemd-&systemd-version;.tar.xz</filename> even though the
|
---|
| 48 | application we are installing is udev. After changing to the
|
---|
[d7f2eb0] | 49 | systemd directory, follow the instructions below.</para></note>
|
---|
| 50 |
|
---|
[f896e21c] | 51 | <para>The udev-lfs tarball contains LFS-specific files used to build
|
---|
[d7f2eb0] | 52 | Udev. Unpack it into the systemd source directory:</para>
|
---|
[f896e21c] | 53 |
|
---|
| 54 | <screen><userinput remap="pre">tar -xvf ../&udev-lfs;.tar.bz2</userinput></screen>
|
---|
| 55 |
|
---|
[053b206] | 56 | <para>Create two symbolic links to header files and set an
|
---|
| 57 | environment variable to properly use <xref linkend="ch-tools-util-linux"/>.</para>
|
---|
| 58 |
|
---|
| 59 | <screen><userinput remap="pre">ln -svf /tools/include/blkid /usr/include
|
---|
| 60 | ln -svf /tools/include/uuid /usr/include
|
---|
| 61 | export LD_LIBRARY_PATH=/tools/lib</userinput></screen>
|
---|
| 62 |
|
---|
[92905ed] | 63 | <para>Build the package:</para>
|
---|
[f896e21c] | 64 |
|
---|
[b7da138f] | 65 | <screen><userinput remap="make">make -f &udev-lfs;/Makefile.lfs</userinput></screen>
|
---|
[f896e21c] | 66 |
|
---|
| 67 | <para>Install the package:</para>
|
---|
| 68 |
|
---|
[b7da138f] | 69 | <screen><userinput remap="install">make -f &udev-lfs;/Makefile.lfs install</userinput></screen>
|
---|
| 70 |
|
---|
| 71 | <caution><para>There are several places within the
|
---|
| 72 | <application>systemd</application> source code that have explicit directory
|
---|
| 73 | paths embedded. For instance, the binary version of the hardware
|
---|
| 74 | database's path and file name used at run time,
|
---|
[4783efe] | 75 | <filename>/etc/udev/hwdb.bin</filename>, cannot be changed without explicit
|
---|
[b7da138f] | 76 | changes to the source code.</para></caution>
|
---|
| 77 |
|
---|
| 78 | <para>Now initialize the hardware database:</para>
|
---|
| 79 |
|
---|
| 80 | <screen><userinput remap="install">build/udevadm hwdb --update</userinput></screen>
|
---|
[d29a03b] | 81 |
|
---|
| 82 | <para>Finally set up the persistent network udev rules. This task will be
|
---|
| 83 | explained in detail in <xref linkend='stable-net-names'/>. Note that the
|
---|
| 84 | <filename class='directory'>/sys</filename> and <filename
|
---|
| 85 | class='directory'>/proc</filename> filesystems must be mounted in the
|
---|
| 86 | chroot environment as explained at the beginning of this chapter for the
|
---|
| 87 | following script to work.</para>
|
---|
| 88 |
|
---|
[b7da138f] | 89 | <screen><userinput remap="install">bash &udev-lfs;/init-net-rules.sh</userinput></screen>
|
---|
[053b206] | 90 |
|
---|
| 91 | <para>Do some cleanup:</para>
|
---|
| 92 |
|
---|
| 93 | <screen><userinput remap="install">rm -fv /usr/include/{uuid,blkid}
|
---|
| 94 | unset LD_LIBRARY_PATH</userinput></screen>
|
---|
| 95 |
|
---|
[f896e21c] | 96 | </sect2>
|
---|
| 97 |
|
---|
| 98 | <sect2 id="contents-udev" role="content">
|
---|
| 99 | <title>Contents of Udev</title>
|
---|
| 100 |
|
---|
| 101 | <segmentedlist>
|
---|
| 102 | <segtitle>Installed programs</segtitle>
|
---|
| 103 | <segtitle>Installed libraries</segtitle>
|
---|
| 104 | <segtitle>Installed directories</segtitle>
|
---|
| 105 |
|
---|
| 106 | <seglistitem>
|
---|
| 107 | <seg>accelerometer, ata_id, cdrom_id, collect, mtd_probe,
|
---|
[2191632] | 108 | scsi_id, v4l_id, udevadm, and udevd</seg>
|
---|
[2ca8941] | 109 |
|
---|
[2191632] | 110 | <seg>libudev.so</seg>
|
---|
[2ca8941] | 111 |
|
---|
[f896e21c] | 112 | <seg>/etc/udev, /lib/udev, /lib/firmware, /usr/share/doc/udev</seg>
|
---|
| 113 | </seglistitem>
|
---|
| 114 | </segmentedlist>
|
---|
| 115 |
|
---|
| 116 | <variablelist>
|
---|
| 117 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
|
---|
| 118 | <?dbfo list-presentation="list"?>
|
---|
| 119 | <?dbhtml list-presentation="table"?>
|
---|
| 120 |
|
---|
| 121 | <varlistentry id="ata_id">
|
---|
| 122 | <term><command>ata_id</command></term>
|
---|
| 123 | <listitem>
|
---|
| 124 | <para>Provides Udev with a unique string and
|
---|
| 125 | additional information (uuid, label) for an ATA drive</para>
|
---|
| 126 | <indexterm zone="ch-system-udev ata_id">
|
---|
| 127 | <primary sortas="b-ata_id">ata_id</primary>
|
---|
| 128 | </indexterm>
|
---|
| 129 | </listitem>
|
---|
| 130 | </varlistentry>
|
---|
| 131 |
|
---|
| 132 | <varlistentry id="cdrom_id">
|
---|
| 133 | <term><command>cdrom_id</command></term>
|
---|
| 134 | <listitem>
|
---|
| 135 | <para>Provides Udev with the capabilities of a
|
---|
| 136 | CD-ROM or DVD-ROM drive</para>
|
---|
| 137 | <indexterm zone="ch-system-udev cdrom_id">
|
---|
| 138 | <primary sortas="b-cdrom_id">cdrom_id</primary>
|
---|
| 139 | </indexterm>
|
---|
| 140 | </listitem>
|
---|
| 141 | </varlistentry>
|
---|
| 142 |
|
---|
| 143 | <varlistentry id="collect">
|
---|
| 144 | <term><command>collect</command></term>
|
---|
| 145 | <listitem>
|
---|
| 146 | <para>Given an ID for the current uevent and a list of
|
---|
| 147 | IDs (for all target uevents), registers the current ID
|
---|
| 148 | and indicates whether all target IDs have been registered</para>
|
---|
| 149 | <indexterm zone="ch-system-udev collect">
|
---|
| 150 | <primary sortas="b-collect">collect</primary>
|
---|
| 151 | </indexterm>
|
---|
| 152 | </listitem>
|
---|
| 153 | </varlistentry>
|
---|
| 154 |
|
---|
| 155 | <varlistentry id="scsi_id">
|
---|
| 156 | <term><command>scsi_id</command></term>
|
---|
| 157 | <listitem>
|
---|
| 158 | <para>Provides Udev with a unique SCSI identifier
|
---|
| 159 | based on the data returned from sending a SCSI INQUIRY command to
|
---|
| 160 | the specified device</para>
|
---|
| 161 | <indexterm zone="ch-system-udev scsi_id">
|
---|
| 162 | <primary sortas="b-scsi_id">scsi_id</primary>
|
---|
| 163 | </indexterm>
|
---|
| 164 | </listitem>
|
---|
| 165 | </varlistentry>
|
---|
| 166 |
|
---|
| 167 | <varlistentry id="udevadm">
|
---|
| 168 | <term><command>udevadm</command></term>
|
---|
| 169 | <listitem>
|
---|
| 170 | <para>Generic udev administration tool: controls the udevd daemon,
|
---|
| 171 | provides info from the Udev database, monitors uevents, waits for
|
---|
| 172 | uevents to finish, tests Udev configuration, and triggers uevents
|
---|
| 173 | for a given device</para>
|
---|
| 174 | <indexterm zone="ch-system-udev udevadm">
|
---|
| 175 | <primary sortas="b-udevadm">udevadm</primary>
|
---|
| 176 | </indexterm>
|
---|
| 177 | </listitem>
|
---|
| 178 | </varlistentry>
|
---|
| 179 |
|
---|
| 180 | <varlistentry id="udevd">
|
---|
| 181 | <term><command>udevd</command></term>
|
---|
| 182 | <listitem>
|
---|
| 183 | <para>A daemon that listens for uevents on the netlink socket,
|
---|
| 184 | creates devices and runs the configured external programs in
|
---|
| 185 | response to these uevents</para>
|
---|
| 186 | <indexterm zone="ch-system-udev udevd">
|
---|
| 187 | <primary sortas="b-udevd">udevd</primary>
|
---|
| 188 | </indexterm>
|
---|
| 189 | </listitem>
|
---|
| 190 | </varlistentry>
|
---|
| 191 |
|
---|
| 192 | <varlistentry id="libudev">
|
---|
| 193 | <term><filename class="libraryfile">libudev</filename></term>
|
---|
| 194 | <listitem>
|
---|
| 195 | <para>A library interface to udev device information</para>
|
---|
| 196 | <indexterm zone="ch-system-udev libudev">
|
---|
| 197 | <primary sortas="c-libudev">libudev</primary>
|
---|
| 198 | </indexterm>
|
---|
| 199 | </listitem>
|
---|
| 200 | </varlistentry>
|
---|
| 201 |
|
---|
| 202 | <varlistentry id="etc-udev">
|
---|
| 203 | <term><filename class="directory">/etc/udev</filename></term>
|
---|
| 204 | <listitem>
|
---|
| 205 | <para>Contains Udev configuration files,
|
---|
| 206 | device permissions, and rules for device naming</para>
|
---|
| 207 | <indexterm zone="ch-system-udev etc-udev">
|
---|
| 208 | <primary sortas="e-/etc/udev">/etc/udev</primary>
|
---|
| 209 | </indexterm>
|
---|
| 210 | </listitem>
|
---|
| 211 | </varlistentry>
|
---|
| 212 |
|
---|
| 213 | </variablelist>
|
---|
| 214 |
|
---|
| 215 | </sect2>
|
---|
| 216 |
|
---|
| 217 | </sect1>
|
---|