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git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10463 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
218 lines
7.7 KiB
XML
218 lines
7.7 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../general.ent">
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%general-entities;
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]>
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<sect1 id="ch-system-udev" role="wrap">
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<?dbhtml filename="udev.html"?>
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<sect1info condition="script">
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<productname>udev</productname>
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<productnumber>&systemd-version;</productnumber>
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<address>&systemd-url;</address>
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</sect1info>
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<title>Udev-&systemd-version; (Extracted from systemd-&systemd-version;)</title>
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<indexterm zone="ch-system-udev">
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<primary sortas="a-Udev">Udev</primary>
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</indexterm>
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<sect2 role="package">
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<title/>
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<para>The Udev package contains programs for dynamic creation of device
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nodes. The development of udev has been merged with systemd, but
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most of systemd is incompatible with LFS. Here we build and install just
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the needed udev files.</para>
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<segmentedlist>
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<segtitle>&buildtime;</segtitle>
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<segtitle>&diskspace;</segtitle>
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<seglistitem>
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<seg>&systemd-ch6-sbu;</seg>
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<seg>&systemd-ch6-du;</seg>
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</seglistitem>
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</segmentedlist>
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</sect2>
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<sect2 role="installation">
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<title>Installation of Udev</title>
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<note><para>This package is a little different from other packages. The
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initial package that is extracted is
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<filename>systemd-&systemd-version;.tar.xz</filename> even though the
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application we are installing is udev. After changing to the
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systemd directory, follow the instructions below.</para></note>
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<para>The udev-lfs tarball contains LFS-specific files used to build
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Udev. Unpack it into the systemd source directory:</para>
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<screen><userinput remap="pre">tar -xvf ../&udev-lfs;.tar.bz2</userinput></screen>
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<para>Create two symbolic links to header files and set an
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environment variable to properly use <xref linkend="ch-tools-util-linux"/>.</para>
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<screen><userinput remap="pre">ln -svf /tools/include/blkid /usr/include
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ln -svf /tools/include/uuid /usr/include
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export LD_LIBRARY_PATH=/tools/lib</userinput></screen>
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<para>Build the package:</para>
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<screen><userinput remap="make">make -f &udev-lfs;/Makefile.lfs</userinput></screen>
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<para>Install the package:</para>
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<screen><userinput remap="install">make -f &udev-lfs;/Makefile.lfs install</userinput></screen>
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<caution><para>There are several places within the
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<application>systemd</application> source code that have explicit directory
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paths embedded. For instance, the binary version of the hardware
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database's path and file name used at run time,
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<filename>/etc/udev/hwdb.bin</filename>, cannot be changed without explicit
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changes to the source code.</para></caution>
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<para>Now initialize the hardware database:</para>
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<screen><userinput remap="install">build/udevadm hwdb --update</userinput></screen>
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<para>Finally set up the persistent network udev rules. This task will be
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explained in detail in <xref linkend='stable-net-names'/>. Note that the
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<filename class='directory'>/sys</filename> and <filename
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class='directory'>/proc</filename> filesystems must be mounted in the
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chroot environment as explained at the beginning of this chapter for the
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following script to work.</para>
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<screen><userinput remap="install">bash &udev-lfs;/init-net-rules.sh</userinput></screen>
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<para>Do some cleanup:</para>
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<screen><userinput remap="install">rm -fv /usr/include/{uuid,blkid}
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unset LD_LIBRARY_PATH</userinput></screen>
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</sect2>
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<sect2 id="contents-udev" role="content">
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<title>Contents of Udev</title>
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<segmentedlist>
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<segtitle>Installed programs</segtitle>
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<segtitle>Installed libraries</segtitle>
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<segtitle>Installed directories</segtitle>
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<seglistitem>
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<seg>accelerometer, ata_id, cdrom_id, collect, mtd_probe,
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scsi_id, v4l_id, udevadm, and udevd</seg>
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<seg>libudev.so</seg>
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<seg>/etc/udev, /lib/udev, /lib/firmware, /usr/share/doc/udev</seg>
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</seglistitem>
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</segmentedlist>
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<variablelist>
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<bridgehead renderas="sect3">Short Descriptions</bridgehead>
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<?dbfo list-presentation="list"?>
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<?dbhtml list-presentation="table"?>
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<varlistentry id="ata_id">
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<term><command>ata_id</command></term>
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<listitem>
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<para>Provides Udev with a unique string and
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additional information (uuid, label) for an ATA drive</para>
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<indexterm zone="ch-system-udev ata_id">
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<primary sortas="b-ata_id">ata_id</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="cdrom_id">
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<term><command>cdrom_id</command></term>
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<listitem>
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<para>Provides Udev with the capabilities of a
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CD-ROM or DVD-ROM drive</para>
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<indexterm zone="ch-system-udev cdrom_id">
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<primary sortas="b-cdrom_id">cdrom_id</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="collect">
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<term><command>collect</command></term>
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<listitem>
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<para>Given an ID for the current uevent and a list of
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IDs (for all target uevents), registers the current ID
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and indicates whether all target IDs have been registered</para>
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<indexterm zone="ch-system-udev collect">
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<primary sortas="b-collect">collect</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="scsi_id">
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<term><command>scsi_id</command></term>
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<listitem>
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<para>Provides Udev with a unique SCSI identifier
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based on the data returned from sending a SCSI INQUIRY command to
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the specified device</para>
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<indexterm zone="ch-system-udev scsi_id">
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<primary sortas="b-scsi_id">scsi_id</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="udevadm">
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<term><command>udevadm</command></term>
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<listitem>
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<para>Generic udev administration tool: controls the udevd daemon,
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provides info from the Udev database, monitors uevents, waits for
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uevents to finish, tests Udev configuration, and triggers uevents
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for a given device</para>
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<indexterm zone="ch-system-udev udevadm">
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<primary sortas="b-udevadm">udevadm</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="udevd">
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<term><command>udevd</command></term>
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<listitem>
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<para>A daemon that listens for uevents on the netlink socket,
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creates devices and runs the configured external programs in
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response to these uevents</para>
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<indexterm zone="ch-system-udev udevd">
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<primary sortas="b-udevd">udevd</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="libudev">
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<term><filename class="libraryfile">libudev</filename></term>
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<listitem>
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<para>A library interface to udev device information</para>
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<indexterm zone="ch-system-udev libudev">
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<primary sortas="c-libudev">libudev</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="etc-udev">
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<term><filename class="directory">/etc/udev</filename></term>
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<listitem>
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<para>Contains Udev configuration files,
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device permissions, and rules for device naming</para>
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<indexterm zone="ch-system-udev etc-udev">
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<primary sortas="e-/etc/udev">/etc/udev</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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</variablelist>
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</sect2>
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</sect1>
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