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<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
<!ENTITY % general-entities SYSTEM "../../general.ent">
%general-entities;
]>
<sect1 id="ch-system-udev" role="wrap">
<?dbhtml filename="udev.html"?>
<title>Udev-&udev-version;</title>
<indexterm zone="ch-system-udev">
<primary sortas="a-Udev">Udev</primary>
</indexterm>
<sect2 role="package">
<title/>
<para>The Udev package contains programs for dynamic creation of device
nodes.</para>
</sect2>
&env-target;
<sect2 role="installation">
<title>Installation of Udev</title>
<para os="a">Prepare Udev for compilation:</para>
<screen os="b"><userinput>./configure --build=${CLFS_HOST} --host=${CLFS_TARGET} \
--exec-prefix="" --sysconfdir=/etc \
--libexecdir=/lib/udev --libdir=/usr/lib \
--disable-extras</userinput></screen>
<para os="c">Compile the package:</para>
<screen os="d"><userinput>make</userinput></screen>
<para os="e">Install the package:</para>
<screen os="f"><userinput>make DESTDIR=${CLFS} install</userinput></screen>
<para os="g">Install documentation:</para>
<screen os="h"><userinput>install -v -m644 -D docs/writing_udev_rules/index.html \
${CLFS}/usr/share/doc/udev-&udev-version;/index.html</userinput></screen>
<para os="i">Create a directory for storing firmware that can be loaded by
<command>udev</command>:</para>
<screen os="j"><userinput>install -dv ${CLFS}/lib/firmware</userinput></screen>
</sect2>
<sect2 id="contents-udev" role="content">
<title>Contents of Udev</title>
<segmentedlist>
<segtitle>Installed programs</segtitle>
<segtitle>Installed directory</segtitle>
<seglistitem>
<seg>udevcontrol, udevd, udevinfo, udevmonitor, udevsend,
udevtest, and udevtrigger</seg>
<seg>/etc/udev</seg>
</seglistitem>
</segmentedlist>
<variablelist>
<bridgehead renderas="sect3">Short Descriptions</bridgehead>
<?dbfo list-presentation="list"?>
<?dbhtml list-presentation="table"?>
<varlistentry id="udevcontrol">
<term><command>udevcontrol</command></term>
<listitem>
<para>Configures a number of options for the running
<command>udevd</command> daemon, such as the log level.</para>
<indexterm zone="ch-system-udev udevcontrol">
<primary sortas="b-udevcontrol">udevcontrol</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="udevd">
<term><command>udevd</command></term>
<listitem>
<para>A daemon that reorders hotplug events before submitting them to
<command>udev</command>,
thus avoiding various race conditions</para>
<indexterm zone="ch-system-udev udevd">
<primary sortas="b-udevd">udevd</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="udevinfo">
<term><command>udevinfo</command></term>
<listitem>
<para>Allows users to query the <command>udev</command> database for
information on any device currently present on the system; it also
provides a way to query any device in the <systemitem
class="filesystem">sysfs</systemitem> tree to help create udev
rules</para>
<indexterm zone="ch-system-udev udevinfo">
<primary sortas="b-udevinfo">udevinfo</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="udevmonitor">
<term><command>udevmonitor</command></term>
<listitem>
<para>Prints the event received from the kernel and the event which
<command>udev</command> sends out after rule processing</para>
<indexterm zone="ch-system-udev udevmonitor">
<primary sortas="b-udevmonitor">udevmonitor</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="udevsettle">
<term><command>udevsettle</command></term>
<listitem>
<para>Watches the Udev event queue and exits if all current uevents
have been handled</para>
<indexterm zone="ch-system-udev udevsettle">
<primary sortas="b-udevsettle">udevsettle</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="udevtest">
<term><command>udevtest</command></term>
<listitem>
<para>Simulates a <command>udev</command> run for the given device,
and prints out the name of the node the real <command>udev</command>
would have created or the name of the renamed network interface</para>
<indexterm zone="ch-system-udev udevtest">
<primary sortas="b-udevtest">udevtest</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="udevtrigger">
<term><command>udevtrigger</command></term>
<listitem>
<para>Walks the sysfs tree for devices that need to be added to the
system.</para>
<indexterm zone="ch-system-udev udevtrigger">
<primary sortas="b-udevtrigger">udevtrigger</primary>
</indexterm>
</listitem>
</varlistentry>
<!-- helpers start here -->
<varlistentry id="ata_id">
<term><command>ata_id</command></term>
<listitem>
<para>Provides Udev with a unique string and additional
information (uuid, label) for an ATA drive</para>
<indexterm zone="ch-system-udev ata_id">
<primary sortas="b-ata_id">ata_id</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="cdrom_id">
<term><command>cdrom_id</command></term>
<listitem>
<para>Print the capabilities of a CDROM or DVDROM drive.</para>
<indexterm zone="ch-system-udev cdrom_id">
<primary sortas="b-cdrom_id">cdrom_id</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="create_floppy_devices">
<term><command>create_floppy_devices</command></term>
<listitem>
<para>Creates all possible floppy devices based on the CMOS type</para>
<indexterm zone="ch-system-udev create_floppy_devices">
<primary sortas="b-create_floppy_devices">create_floppy_devices</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="dasd_id">
<term><command>dasd_id</command></term>
<listitem>
<para>Read the label from an s390 block device.</para>
<indexterm zone="ch-system-udev dasd_id">
<primary sortas="b-dasd_id">dasd_id</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="edd_id">
<term><command>edd_id</command></term>
<listitem>
<para>Identify x86 disk drives from Enhanced Disk Drive calls.</para>
<indexterm zone="ch-system-udev edd_id">
<primary sortas="b-edd_id">edd_id</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="firmware.sh">
<term><command>firmware.sh</command></term>
<listitem>
<para>Script to load firmware for a device</para>
<indexterm zone="ch-system-udev firmware.sh">
<primary sortas="b-firmware.sh">firmware.sh</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="path_id">
<term><command>path_id</command></term>
<listitem>
<para>Provide the shortest possible unique hardware path to a
device</para>
<indexterm zone="ch-system-udev path_id">
<primary sortas="b-path_id">path_id</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="scsi_id">
<term><command>scsi_id</command></term>
<listitem>
<para>Retrieve or generate a unique SCSI identifier.</para>
<indexterm zone="ch-system-udev scsi_id">
<primary sortas="b-scsi_id">scsi_id</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="usb_id">
<term><command>usb_id</command></term>
<listitem>
<para>Identify a USB block device.</para>
<indexterm zone="ch-system-udev usb_id">
<primary sortas="b-usb_id">usb_id</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="vol_id">
<term><command>vol_id</command></term>
<listitem>
<para>Probe filesystem type and read label and uuid.</para>
<indexterm zone="ch-system-udev vol_id">
<primary sortas="b-vol_id">vol_id</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="etc-udev">
<term><filename class="directory">/etc/udev</filename></term>
<listitem>
<para>Contains <command>udev</command> configuration files,
device permissions, and rules for device naming</para>
<indexterm zone="ch-system-udev etc-udev">
<primary sortas="e-/etc/udev">/etc/udev</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="lib-udev">
<term><filename class="directory">/lib/udev</filename></term>
<listitem>
<para>Contains <command>udev</command> helper programs
and static devices which get copied to /dev when booted.</para>
<indexterm zone="ch-system-udev lib-udev">
<primary sortas="e-/lib/udev">/lib/udev</primary>
</indexterm>
</listitem>
</varlistentry>
</variablelist>
</sect2>
</sect1>