source: BOOK/final-system/multilib/udev.xml@ 89847a8

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
  "http://www.oasis-open.org/docbook/xml/4.4/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>

  <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
  href="../common/udev.xml"
  xpointer="xpointer(//*[@role='package'])"/>

  <sect2 role="installation">
    <title>Installation of Udev</title>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../common/udev.xml"
    xpointer="xpointer(//*[@os='a'])"/>

<screen os="b"><userinput>make CC="gcc ${BUILD64}" LD="gcc ${BUILD64}" \
    EXTRAS="extras/firmware extras/run_directory" udevdir=/dev</userinput></screen>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../common/udev.xml"
    xpointer="xpointer(//*[@os='c'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../common/udev.xml"
    xpointer="xpointer(//*[@os='d'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../common/udev.xml"
    xpointer="xpointer(//*[@os='e'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../common/udev.xml"
    xpointer="xpointer(//*[@os='f'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../common/udev.xml"
    xpointer="xpointer(//*[@os='g'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../common/udev.xml"
    xpointer="xpointer(//*[@os='h'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../common/udev.xml"
    xpointer="xpointer(//*[@os='i'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../common/udev.xml"
    xpointer="xpointer(//*[@os='j'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../common/udev.xml"
    xpointer="xpointer(//*[@os='k'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../common/udev.xml"
    xpointer="xpointer(//*[@os='l'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../common/udev.xml"
    xpointer="xpointer(//*[@os='m'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../common/udev.xml"
    xpointer="xpointer(//*[@os='n'])"/>

    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
    href="../common/udev.xml"
    xpointer="xpointer(//*[@os='o'])"/>

  </sect2>

  <sect2 id="contents-udev" role="content">
    <title>Contents of Udev</title>

    <segmentedlist>
      <segtitle>Installed programs</segtitle>
      <segtitle>Installed directory</segtitle>

      <seglistitem>
        <seg>udev, udevd, udevsend, udevstart, udevinfo, and udevtest</seg>
        <seg>/etc/udev</seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="udev">
        <term><command>udev</command></term>
        <listitem>
          <para>Creates device nodes in <filename
          class="directory">/dev</filename> or renames network interfaces (not
          in LFS) in response to hotplug events</para>
            <indexterm zone="ch-system-udev udev">
          <primary sortas="b-udev">udev</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="udevsend">
        <term><command>udevsend</command></term>
        <listitem>
          <para>Delivers hotplug events to <command>udevd</command></para>
            <indexterm zone="ch-system-udev udevsend">
          <primary sortas="b-udevsend">udevsend</primary>
        </indexterm>
      </listitem></varlistentry>

      <varlistentry id="udevstart">
        <term><command>udevstart</command></term>
        <listitem>
          <para>Creates device nodes in <filename class="directory">/dev</filename>
          that correspond to drivers compiled directly into the kernel; it
          performs that task by simulating hotplug events presumably dropped by
          the kernel before invocation of this program (e.g., because the root
          filesystem has not been mounted) and submitting such synthetic hotplug
          events to <command>udev</command></para>
          <indexterm zone="ch-system-udev udevstart">
            <primary sortas="b-udevstart">udevstart</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="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 (not in LFS) 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="etc-udev">
        <term><filename class="directory">/etc/udev</filename></term>
        <listitem>
          <para>Contains <command>udev</command> configuation 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>

    </variablelist>

  </sect2>

</sect1>