diff options
Diffstat (limited to 'chapter06')
| -rw-r--r-- | chapter06/udev.xml | 84 |
1 files changed, 82 insertions, 2 deletions
diff --git a/chapter06/udev.xml b/chapter06/udev.xml index 5e2416077..0f1ae802e 100644 --- a/chapter06/udev.xml +++ b/chapter06/udev.xml @@ -10,6 +10,7 @@ <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> <segmentedlist> <segtitle>&buildtime;</segtitle> @@ -46,8 +47,87 @@ cp ../udev-config-1.rules /etc/udev/rules.d/00-lfs.rules</userinput></screen> <sect2 id="contents-udev" role="content"><title>Contents of Udev</title> -<para>Who knows?</para> -</sect2> +<segmentedlist> +<segtitle>Installed programs</segtitle> +<seglistitem><seg>udev, udevd, udevsend, udevstart, udevinfo, udevtest</seg></seglistitem> +</segmentedlist> + +<variablelist><title>Short descriptions</title> + +<varlistentry id="udev"> +<term><command>udev</command></term> +<listitem><indexterm zone="ch-system-udev udev"><primary +sortas="b-udev">udev</primary></indexterm> +<para>is used to create device nodes in <filename +class="directory">/dev</filename> or to rename network interfaces (not in LFS) +in response to hotplug events.</para> +</listitem></varlistentry> + +<varlistentry id="udevd"> +<term><command>udevd</command></term> +<listitem> <indexterm zone="ch-system-udev udevd"><primary +sortas="b-udevd">udevd</primary></indexterm> +<para>is a daemon that reorders hotplug events before submitting them to +<command>udev</command>, +thus avoiding various race conditions.</para> +</listitem></varlistentry> + +<varlistentry id="udevsend"> +<term><command>udevsend</command></term> +<listitem> <indexterm zone="ch-system-udev udevsend"><primary +sortas="b-udevsend">udevsend</primary></indexterm> +<para>is used to deliver hotplug events to <command>udevd</command>.</para> +</listitem></varlistentry> + +<varlistentry id="udevstart"> +<term><command>udevstart</command></term> +<listitem> <indexterm zone="ch-system-udev udevstart"><primary +sortas="b-udevstart">udevstart</primary></indexterm> +<para>is used to create 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> +</listitem> +</varlistentry> + +<varlistentry id="udevinfo"> +<term><command>udevinfo</command></term> +<listitem> <indexterm zone="ch-system-udev udevinfo"><primary +sortas="b-udevinfo">udevinfo</primary></indexterm> +<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 sysfs tree to help creating udev +rules.</para> +</listitem></varlistentry> + +<varlistentry id="udevtest"> +<term><command>udevtest</command></term> +<listitem> <indexterm zone="ch-system-udev udevtest"><primary +sortas="b-udevtest">udevtest</primary></indexterm> +<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> +</listitem></varlistentry> + +<varlistentry id="etc-dev-d"> +<term><filename class="directory">/etc/dev.d</filename></term> +<listitem> <indexterm zone="ch-system-udev etc-dev-d"><primary +sortas="b-etc-dev-d">/etc/dev.d</primary></indexterm> +<para>directory is supposed to contain user-written handlers for device +creation hotplug events.</para> +</listitem></varlistentry> + +<varlistentry id="etc-udev"> +<term><filename class="directory">/etc/udev</filename></term> +<listitem> <indexterm zone="ch-system-udev etc-udev"><primary +sortas="b-etc-udev">/etc/udev</primary></indexterm> +<para>directory contains <command>udev</command> configuation files, +device permissions and rules for device naming.</para> +</listitem></varlistentry> +</variablelist> +</sect2> </sect1> |