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Diffstat (limited to 'chapter06/udev.xml')
-rw-r--r-- | chapter06/udev.xml | 105 |
1 files changed, 99 insertions, 6 deletions
diff --git a/chapter06/udev.xml b/chapter06/udev.xml index b1a34c51d..e25ed756d 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> @@ -17,36 +18,128 @@ <seglistitem><seg>0.2 SBU</seg><seg>5.2 MB</seg></seglistitem> </segmentedlist> +<segmentedlist> +<segtitle>Udev installation depends on</segtitle> +<seglistitem><seg>Coreutils and Make</seg></seglistitem> +</segmentedlist> + </sect2> <sect2 role="installation"> <title>Installation of Udev</title> -<para>Compile Udev:</para> +<para>Compile the package:</para> <screen><userinput>make udevdir=/dev</userinput></screen> -<para>Install it:</para> +<variablelist> +<varlistentry> +<term><parameter>udevdir=/dev</parameter></term> +<listitem><para>This tells <command>udev</command> in which directory +devices nodes are to be created.</para></listitem> +</varlistentry> +</variablelist> + +<para>This package does not come with a test suite.</para> + +<para>Install the package:</para> <screen><userinput>make udevdir=/dev install</userinput></screen> -<para>Install our configuration files:</para> +<para>Udev's configuration is far from ideal by default, so install +the configuration files here:</para> <screen><userinput>cp ../udev-config-2.permissions \ /etc/udev/permissions.d/25-lfs.permissions cp ../udev-config-1.rules /etc/udev/rules.d/25-lfs.rules</userinput></screen> -<para>Create the full compliment of device nodes:</para> +<!-- Edit Me --> +<para>Run the <command>udevstart</command> program to create our full +compliment of device nodes.</para> <screen><userinput>/sbin/udevstart</userinput></screen> </sect2> - <sect2 id="contents-udev" role="content"><title>Contents of Udev</title> -<para>See testing</para> +<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"?> + +<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> + |