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https://git.linuxfromscratch.org/lfs.git
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a1708eee97
git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@9442 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
350 lines
12 KiB
XML
350 lines
12 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>&udev-version;</productnumber>
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<address>&udev-url;</address>
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</sect1info>
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<title>Udev-&udev-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.</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>&udev-ch6-sbu;</seg>
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<seg>&udev-ch6-du; plus &udev-testfiles-du; for testfiles</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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<para>The udev-config tarball contains LFS-specific files used to configure
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Udev. Unpack it into the Udev source directory:</para>
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<screen><userinput remap="pre">tar -xvf ../&udev-config;.tar.bz2</userinput></screen>
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<para>The udev-testfiles tarball contains files needed to test udev. The
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file expands to an apparent size of about 37MB but the actual disk usage
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is less than 7MB.</para>
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<screen><userinput remap="pre">tar -xvf ../udev-&udev-version;-testfiles.tar.bz2 --strip-components=1</userinput></screen>
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<para>Create some devices and directories that Udev cannot handle due to
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them being required very early in the boot process, or by Udev itself:</para>
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<screen><userinput remap="install">install -dv /lib/{firmware,udev/devices/{pts,shm}}
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mknod -m0666 /lib/udev/devices/null c 1 3</userinput></screen>
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<para>Prepare the package for compilation:</para>
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<!-- Note that "libdir=/usr/lib64" would be required for multilib. -->
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<screen><userinput remap="configure">./configure --prefix=/usr \
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--sysconfdir=/etc --sbindir=/sbin \
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--with-rootlibdir=/lib --libexecdir=/lib/udev \
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--disable-extras --disable-introspection</userinput></screen>
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<variablelist>
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<title>The meaning of the new configure options</title>
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<varlistentry>
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<term><parameter>--with-rootlibdir=/lib</parameter></term>
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<listitem>
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<para>This controls where the <filename
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class="libraryfile">libudev</filename> library is installed. The
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library needs to be in <filename class="directory">/lib</filename>
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because it's used by Udev at boot time, before <filename
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class="directory">/usr</filename> might be available, and the default
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--rootlibdir is <filename class="directory">/usr/lib</filename>.</para>
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</listitem>
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</varlistentry>
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<!-- Note that libexecdir *MUST* stay /lib/udev, even on a 64-bit
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/ multilib system where udev is compiled for 64-bit. Other
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packages require this exact path; the udev maintainers have
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said this is part of the udev API. -->
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<varlistentry>
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<term><parameter>--libexecdir=/lib/udev</parameter></term>
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<listitem>
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<para>This controls where Udev-internal rules and helper programs
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are installed.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>--disable-extras</parameter></term>
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<listitem>
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<para>This option prevents Udev from installing helper programs and
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other extras which require more external libraries. These libraries
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are not part of the base LFS system. See the Udev
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<filename>README</filename> file for more information.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>--disable-introspection</parameter></term>
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<listitem>
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<para>This option prevents Udev's instrospection feature, which
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requires packages not installed as part of the base LFS system. See
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the Udev <filename>README</filename> file for more information.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>Compile the package:</para>
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<screen><userinput remap="make">make</userinput></screen>
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<para>Test the package.</para>
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<screen><userinput remap="test">make check</userinput></screen>
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<para>Install the package:</para>
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<screen><userinput remap="install">make install</userinput></screen>
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<para>Remove an empty documentation directory:</para>
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<screen><userinput remap="install">rmdir -v /usr/share/doc/udev</userinput></screen>
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<para>Now install the LFS-specific custom rules files:</para>
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<screen><userinput remap="install">cd &udev-config;
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make install</userinput></screen>
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<para>Install the documentation that explains the LFS-specific rules
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files:</para>
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<screen><userinput remap="install">make install-doc</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>ata_id, cdrom_id, collect, create_floppy_devices, edd_id,
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firmware.sh, fstab_import, path_id, scsi_id, udevadm, udevd,
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usb_id, write_cd_rules, and write_net_rules</seg>
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<seg>libudev.{a,so}</seg>
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<seg>/etc/udev, /lib/udev, /lib/firmware</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="create_floppy_devices">
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<term><command>create_floppy_devices</command></term>
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<listitem>
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<para>Creates all possible floppy devices based on the CMOS type</para>
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<indexterm zone="ch-system-udev create_floppy_devices">
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<primary sortas="b-create_floppy_devices">create_floppy_devices</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="edd_id">
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<term><command>edd_id</command></term>
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<listitem>
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<para>Provides Udev with the EDD ID for a BIOS disk drive</para>
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<indexterm zone="ch-system-udev edd_id">
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<primary sortas="b-edd_id">edd_id</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="firmware.sh">
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<term><command>firmware.sh</command></term>
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<listitem>
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<para>Uploads firmware to devices</para>
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<indexterm zone="ch-system-udev firmware.sh">
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<primary sortas="b-firmware.sh">firmware.sh</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="fstab_import">
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<term><command>fstab_import</command></term>
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<listitem>
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<para>Finds an entry in <filename>/etc/fstab</filename> that
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matches the current device, and provides its information to
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Udev</para>
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<indexterm zone="ch-system-udev fstab_import">
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<primary sortas="b-fstab_import">fstab_import</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="path_id">
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<term><command>path_id</command></term>
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<listitem>
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<para>Provides the shortest possible unique hardware path to a
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device</para>
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<indexterm zone="ch-system-udev path_id">
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<primary sortas="b-path_id">path_id</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="usb_id">
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<term><command>usb_id</command></term>
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<listitem>
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<para>Provides Udev with information about USB
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devices</para>
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<indexterm zone="ch-system-udev usb_id">
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<primary sortas="b-usb_id">usb_id</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="write_cd_rules">
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<term><command>write_cd_rules</command></term>
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<listitem>
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<para>A script which generates Udev rules to provide stable names for
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optical drives (see also <xref linkend="ch-scripts-symlinks"/>)</para>
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<indexterm zone="ch-system-udev write_cd_rules">
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<primary sortas="b-write_cd_rules">write_cd_rules</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="write_net_rules">
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<term><command>write_net_rules</command></term>
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<listitem>
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<para>A script which generates rules to provide stable names for
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network interfaces (see also <xref linkend="ch-scripts-network"/>)
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</para>
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<indexterm zone="ch-system-udev write_net_rules">
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<primary sortas="b-write_net_rules">write_net_rules</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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