[9dfc02f] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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[b06ca36] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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[9dfc02f] | 4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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[ddd5542] | 7 |
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[a001133] | 8 | <sect1 id="ch-system-udev" role="wrap">
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[ddd5542] | 9 | <?dbhtml filename="udev.html"?>
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| 10 |
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[e747759] | 11 | <sect1info condition="script">
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| 12 | <productname>udev</productname>
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| 13 | <productnumber>&udev-version;</productnumber>
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| 14 | <address>&udev-url;</address>
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| 15 | </sect1info>
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| 16 |
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[ddd5542] | 17 | <title>Udev-&udev-version;</title>
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| 18 |
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| 19 | <indexterm zone="ch-system-udev">
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| 20 | <primary sortas="a-Udev">Udev</primary>
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| 21 | </indexterm>
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| 22 |
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| 23 | <sect2 role="package">
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| 24 | <title/>
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[9dfc02f] | 25 |
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[ddd5542] | 26 | <para>The Udev package contains programs for dynamic creation of device
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| 27 | nodes.</para>
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[9dfc02f] | 28 |
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[ddd5542] | 29 | <segmentedlist>
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| 30 | <segtitle>&buildtime;</segtitle>
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| 31 | <segtitle>&diskspace;</segtitle>
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[9dfc02f] | 32 |
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[ddd5542] | 33 | <seglistitem>
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[e4a5635] | 34 | <seg>&udev-ch6-sbu;</seg>
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| 35 | <seg>&udev-ch6-du;</seg>
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[ddd5542] | 36 | </seglistitem>
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| 37 | </segmentedlist>
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[9dfc02f] | 38 |
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[ddd5542] | 39 | </sect2>
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[9dfc02f] | 40 |
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[ddd5542] | 41 | <sect2 role="installation">
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| 42 | <title>Installation of Udev</title>
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| 43 |
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[7d6d34b] | 44 | <para>The udev-config tarball contains LFS-specific files used to configure
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[e1060de] | 45 | Udev. Unpack it into the Udev source directory:</para>
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[7d6d34b] | 46 |
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[0445a3d] | 47 | <screen><userinput remap="pre">tar -xvf ../&udev-config;.tar.bz2</userinput></screen>
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[7d6d34b] | 48 |
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[d2c332bc] | 49 | <para>Create some devices and directories that Udev cannot handle due to
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[61e63d3] | 50 | them being required very early in the boot process, or by Udev itself:</para>
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[d2c332bc] | 51 |
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[2b596c0b] | 52 | <screen><userinput remap="install">install -dv /lib/{firmware,udev/devices/{pts,shm}}
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[d2c332bc] | 53 | mknod -m0666 /lib/udev/devices/null c 1 3
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| 54 | ln -sv /proc/self/fd /lib/udev/devices/fd
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| 55 | ln -sv /proc/self/fd/0 /lib/udev/devices/stdin
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| 56 | ln -sv /proc/self/fd/1 /lib/udev/devices/stdout
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| 57 | ln -sv /proc/self/fd/2 /lib/udev/devices/stderr
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| 58 | ln -sv /proc/kcore /lib/udev/devices/core</userinput></screen>
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| 59 |
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[166a9db] | 60 | <para>Prepare the package for compilation:</para>
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[81fd230] | 61 |
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[3a34893] | 62 | <!-- Note that "libdir=/usr/lib64" would be required for multilib. -->
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[d75c123] | 63 | <screen><userinput remap="configure">./configure --prefix=/usr \
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[3a34893] | 64 | --sysconfdir=/etc --sbindir=/sbin \
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| 65 | --with-rootlibdir=/lib --libexecdir=/lib/udev \
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[c711a61] | 66 | --docdir=/usr/share/doc/udev-&udev-version; \
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[e69c45b] | 67 | --disable-extras --disable-introspection</userinput></screen>
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[3a34893] | 68 |
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| 69 | <variablelist>
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| 70 | <title>The meaning of the new configure options</title>
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| 71 |
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| 72 | <varlistentry>
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| 73 | <term><parameter>--with-rootlibdir=/lib</parameter></term>
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| 74 | <listitem>
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| 75 | <para>This controls where the <filename
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| 76 | class="libraryfile">libudev</filename> library is installed. The
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| 77 | library needs to be in <filename class="directory">/lib</filename>
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| 78 | because it's used by Udev at boot time, before <filename
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| 79 | class="directory">/usr</filename> might be available, and the default
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| 80 | --rootlibdir is <filename class="directory">/usr/lib</filename>.</para>
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| 81 | </listitem>
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| 82 | </varlistentry>
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| 83 |
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| 84 | <!-- Note that libexecdir *MUST* stay /lib/udev, even on a 64-bit
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| 85 | / multilib system where udev is compiled for 64-bit. Other
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| 86 | packages require this exact path; the udev maintainers have
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| 87 | said this is part of the udev API. -->
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| 88 | <varlistentry>
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| 89 | <term><parameter>--libexecdir=/lib/udev</parameter></term>
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| 90 | <listitem>
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| 91 | <para>This controls where Udev-internal rules and helper programs
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| 92 | are installed.</para>
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| 93 | </listitem>
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| 94 | </varlistentry>
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| 95 |
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[c711a61] | 96 | <varlistentry>
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| 97 | <term><parameter>--docdir=/usr/share/doc/udev-&udev-version;</parameter></term>
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| 98 | <listitem>
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| 99 | <para>This option installs the Udev documentation in the
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| 100 | proper location with the naming convention consistent with
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| 101 | other packages.</para>
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| 102 | </listitem>
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| 103 | </varlistentry>
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| 104 |
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[3a34893] | 105 | <varlistentry>
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| 106 | <term><parameter>--disable-extras</parameter></term>
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| 107 | <listitem>
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| 108 | <para>This option prevents Udev from installing helper programs and
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| 109 | other extras which require more external libraries. These libraries
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| 110 | are not part of the base LFS system. See the Udev
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| 111 | <filename>README</filename> file for more information.</para>
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| 112 | </listitem>
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| 113 | </varlistentry>
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[e69c45b] | 114 |
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| 115 | <varlistentry>
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| 116 | <term><parameter>--disable-introspection</parameter></term>
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| 117 | <listitem>
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| 118 | <para>This option prevents Udev's instrospection feature, which
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| 119 | requires packages not installed as part of the base LFS system. See
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| 120 | the Udev <filename>README</filename> file for more information.</para>
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| 121 | </listitem>
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| 122 | </varlistentry>
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[3a34893] | 123 | </variablelist>
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[ddd5542] | 124 |
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[166a9db] | 125 | <para>Compile the package:</para>
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[0445a3d] | 126 |
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[166a9db] | 127 | <screen><userinput remap="make">make</userinput></screen>
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[81fd230] | 128 |
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[166a9db] | 129 | <para>This package does not come with a test suite.</para>
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[c226182] | 130 |
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[ddd5542] | 131 | <para>Install the package:</para>
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[9dfc02f] | 132 |
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[166a9db] | 133 | <screen><userinput remap="install">make install</userinput></screen>
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[09043c0] | 134 |
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[61e63d3] | 135 | <para>Udev has to be configured in order to work properly, as its default
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[166a9db] | 136 | configuration does not cover all devices. First install two extra rules
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[9faa3e2] | 137 | files from Udev to help support device-mapper and RAID setups:</para>
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| 138 |
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[68edbd40] | 139 | <screen><userinput remap="install">install -m644 -v rules/packages/64-*.rules \
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[d75c123] | 140 | /lib/udev/rules.d/</userinput></screen>
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[9faa3e2] | 141 |
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| 142 | <para>Now install a file to create symlinks for certain hand-held devices:</para>
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| 143 |
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[68edbd40] | 144 | <screen><userinput remap="install">install -m644 -v rules/packages/40-pilot-links.rules \
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[d75c123] | 145 | /lib/udev/rules.d/</userinput></screen>
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[9faa3e2] | 146 |
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[bb8939c] | 147 | <para>Now install a file to handle ISDN devices:</para>
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| 148 |
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| 149 | <screen><userinput remap="install">install -m644 -v rules/packages/40-isdn.rules \
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| 150 | /lib/udev/rules.d/</userinput></screen>
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| 151 |
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[9faa3e2] | 152 | <!-- There are more files available in the packages/ directory, if we want
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| 153 | to consider using them. Most are probably irrelevant to LFS though.
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| 154 | "alsa" isn't, but we already have those rules, using a better set of
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| 155 | matches. Most of the files in packages/ are for other architectures. -->
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| 156 |
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| 157 | <para>Now install the LFS-specific custom rules files:</para>
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[7eac3e32] | 158 |
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[0445a3d] | 159 | <screen><userinput remap="install">cd &udev-config;
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[7e6fb44] | 160 | make install</userinput></screen>
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| 161 |
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| 162 | <para>Install the documentation that explains the LFS-specific rules
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| 163 | files:</para>
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| 164 |
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[0445a3d] | 165 | <screen><userinput remap="install">make install-doc</userinput></screen>
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[7e6fb44] | 166 |
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[ddd5542] | 167 | </sect2>
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| 168 |
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| 169 | <sect2 id="contents-udev" role="content">
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| 170 | <title>Contents of Udev</title>
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| 171 |
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| 172 | <segmentedlist>
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| 173 | <segtitle>Installed programs</segtitle>
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[2791a8e] | 174 | <segtitle>Installed libraries</segtitle>
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[ddd5542] | 175 | <segtitle>Installed directory</segtitle>
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| 176 |
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| 177 | <seglistitem>
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[61e63d3] | 178 | <seg>ata_id, cdrom_id, collect, create_floppy_devices, edd_id,
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| 179 | firmware.sh, fstab_import, path_id, scsi_id, udevadm, udevd,
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[3a34893] | 180 | usb_id, write_cd_rules, and write_net_rules</seg>
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[5f7456b] | 181 | <seg>libudev.{a,so}</seg>
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[ddd5542] | 182 | <seg>/etc/udev</seg>
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| 183 | </seglistitem>
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| 184 | </segmentedlist>
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| 185 |
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| 186 | <variablelist>
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| 187 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 188 | <?dbfo list-presentation="list"?>
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| 189 | <?dbhtml list-presentation="table"?>
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| 190 |
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[d2c332bc] | 191 | <varlistentry id="ata_id">
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| 192 | <term><command>ata_id</command></term>
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| 193 | <listitem>
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| 194 | <para>Provides Udev with a unique string and
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| 195 | additional information (uuid, label) for an ATA drive</para>
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| 196 | <indexterm zone="ch-system-udev ata_id">
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| 197 | <primary sortas="b-ata_id">ata_id</primary>
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| 198 | </indexterm>
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| 199 | </listitem>
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| 200 | </varlistentry>
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| 201 |
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| 202 | <varlistentry id="cdrom_id">
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| 203 | <term><command>cdrom_id</command></term>
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| 204 | <listitem>
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| 205 | <para>Provides Udev with the capabilities of a
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| 206 | CD-ROM or DVD-ROM drive</para>
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| 207 | <indexterm zone="ch-system-udev cdrom_id">
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| 208 | <primary sortas="b-cdrom_id">cdrom_id</primary>
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| 209 | </indexterm>
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| 210 | </listitem>
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| 211 | </varlistentry>
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| 212 |
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[61e63d3] | 213 | <varlistentry id="collect">
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| 214 | <term><command>collect</command></term>
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| 215 | <listitem>
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| 216 | <para>Given an ID for the current uevent and a list of
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| 217 | IDs (for all target uevents), registers the current ID
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| 218 | and indicates whether all target IDs have been registered</para>
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| 219 | <indexterm zone="ch-system-udev collect">
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| 220 | <primary sortas="b-collect">collect</primary>
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| 221 | </indexterm>
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| 222 | </listitem>
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| 223 | </varlistentry>
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| 224 |
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[d2c332bc] | 225 | <varlistentry id="create_floppy_devices">
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| 226 | <term><command>create_floppy_devices</command></term>
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[ddd5542] | 227 | <listitem>
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[d2c332bc] | 228 | <para>Creates all possible floppy devices based on the CMOS type</para>
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| 229 | <indexterm zone="ch-system-udev create_floppy_devices">
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| 230 | <primary sortas="b-create_floppy_devices">create_floppy_devices</primary>
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[ddd5542] | 231 | </indexterm>
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| 232 | </listitem>
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| 233 | </varlistentry>
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| 234 |
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[d2c332bc] | 235 | <varlistentry id="edd_id">
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| 236 | <term><command>edd_id</command></term>
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[ddd5542] | 237 | <listitem>
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[d2c332bc] | 238 | <para>Provides Udev with the EDD ID for a BIOS disk drive</para>
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| 239 | <indexterm zone="ch-system-udev edd_id">
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| 240 | <primary sortas="b-edd_id">edd_id</primary>
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[ddd5542] | 241 | </indexterm>
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| 242 | </listitem>
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| 243 | </varlistentry>
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| 244 |
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[2791a8e] | 245 | <varlistentry id="firmware.sh">
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| 246 | <term><command>firmware.sh</command></term>
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[ddd5542] | 247 | <listitem>
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[d2c332bc] | 248 | <para>Uploads firmware to devices</para>
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[2791a8e] | 249 | <indexterm zone="ch-system-udev firmware.sh">
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| 250 | <primary sortas="b-firmware.sh">firmware.sh</primary>
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[d2c332bc] | 251 | </indexterm>
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| 252 | </listitem>
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| 253 | </varlistentry>
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| 254 |
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[61e63d3] | 255 | <varlistentry id="fstab_import">
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| 256 | <term><command>fstab_import</command></term>
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| 257 | <listitem>
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| 258 | <para>Finds an entry in <filename>/etc/fstab</filename> that
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| 259 | matches the current device, and provides its information to
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| 260 | Udev</para>
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| 261 | <indexterm zone="ch-system-udev fstab_import">
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| 262 | <primary sortas="b-fstab_import">fstab_import</primary>
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| 263 | </indexterm>
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| 264 | </listitem>
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| 265 | </varlistentry>
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| 266 |
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[7d6d34b] | 267 | <varlistentry id="path_id">
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| 268 | <term><command>path_id</command></term>
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| 269 | <listitem>
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[9058aa1] | 270 | <para>Provides the shortest possible unique hardware path to a
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[7d6d34b] | 271 | device</para>
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| 272 | <indexterm zone="ch-system-udev path_id">
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| 273 | <primary sortas="b-path_id">path_id</primary>
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| 274 | </indexterm>
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| 275 | </listitem>
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| 276 | </varlistentry>
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| 277 |
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[d2c332bc] | 278 | <varlistentry id="scsi_id">
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| 279 | <term><command>scsi_id</command></term>
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| 280 | <listitem>
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| 281 | <para>Provides Udev with a unique SCSI identifier
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| 282 | based on the data returned from sending a SCSI INQUIRY command to
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| 283 | the specified device</para>
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| 284 | <indexterm zone="ch-system-udev scsi_id">
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| 285 | <primary sortas="b-scsi_id">scsi_id</primary>
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[ddd5542] | 286 | </indexterm>
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| 287 | </listitem>
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| 288 | </varlistentry>
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| 289 |
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[61e63d3] | 290 | <varlistentry id="udevadm">
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| 291 | <term><command>udevadm</command></term>
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[ddd5542] | 292 | <listitem>
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[61e63d3] | 293 | <para>Generic udev administration tool: controls the udevd daemon,
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| 294 | provides info from the Udev database, monitors uevents, waits for
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| 295 | uevents to finish, tests Udev configuration, and triggers uevents
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| 296 | for a given device</para>
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| 297 | <indexterm zone="ch-system-udev udevadm">
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| 298 | <primary sortas="b-udevadm">udevadm</primary>
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[ddd5542] | 299 | </indexterm>
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| 300 | </listitem>
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| 301 | </varlistentry>
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| 302 |
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| 303 | <varlistentry id="udevd">
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| 304 | <term><command>udevd</command></term>
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| 305 | <listitem>
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[d2c332bc] | 306 | <para>A daemon that listens for uevents on the netlink socket,
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| 307 | creates devices and runs the configured external programs in
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| 308 | response to these uevents</para>
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[ddd5542] | 309 | <indexterm zone="ch-system-udev udevd">
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| 310 | <primary sortas="b-udevd">udevd</primary>
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| 311 | </indexterm>
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| 312 | </listitem>
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| 313 | </varlistentry>
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| 314 |
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[d2c332bc] | 315 | <varlistentry id="usb_id">
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| 316 | <term><command>usb_id</command></term>
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[ddd5542] | 317 | <listitem>
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[d2c332bc] | 318 | <para>Provides Udev with information about USB
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| 319 | devices</para>
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| 320 | <indexterm zone="ch-system-udev usb_id">
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| 321 | <primary sortas="b-usb_id">usb_id</primary>
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[ddd5542] | 322 | </indexterm>
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| 323 | </listitem>
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| 324 | </varlistentry>
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| 325 |
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[2791a8e] | 326 | <varlistentry id="write_cd_rules">
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| 327 | <term><command>write_cd_rules</command></term>
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| 328 | <listitem>
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| 329 | <para>A script which generates Udev rules to provide stable names for
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| 330 | optical drives (see also <xref linkend="ch-scripts-symlinks"/>)</para>
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| 331 | <indexterm zone="ch-system-udev write_cd_rules">
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| 332 | <primary sortas="b-write_cd_rules">write_cd_rules</primary>
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| 333 | </indexterm>
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| 334 | </listitem>
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| 335 | </varlistentry>
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| 336 |
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| 337 | <varlistentry id="write_net_rules">
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| 338 | <term><command>write_net_rules</command></term>
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| 339 | <listitem>
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| 340 | <para>A script which generates rules to provide stable names for
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| 341 | network interfaces (see also <xref linkend="ch-scripts-network"/>)
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| 342 | </para>
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| 343 | <indexterm zone="ch-system-udev write_net_rules">
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| 344 | <primary sortas="b-write_net_rules">write_net_rules</primary>
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| 345 | </indexterm>
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| 346 | </listitem>
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| 347 | </varlistentry>
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| 348 |
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[166a9db] | 349 | <varlistentry id="libudev">
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[5f7456b] | 350 | <term><filename class="libraryfile">libudev</filename></term>
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[166a9db] | 351 | <listitem>
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| 352 | <para>A library interface to udev device information</para>
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| 353 | <indexterm zone="ch-system-udev libudev">
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| 354 | <primary sortas="c-libudev">libudev</primary>
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| 355 | </indexterm>
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| 356 | </listitem>
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| 357 | </varlistentry>
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| 358 |
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[ddd5542] | 359 | <varlistentry id="etc-udev">
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| 360 | <term><filename class="directory">/etc/udev</filename></term>
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| 361 | <listitem>
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[9058aa1] | 362 | <para>Contains Udev configuration files,
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[ddd5542] | 363 | device permissions, and rules for device naming</para>
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| 364 | <indexterm zone="ch-system-udev etc-udev">
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| 365 | <primary sortas="e-/etc/udev">/etc/udev</primary>
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| 366 | </indexterm>
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| 367 | </listitem>
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| 368 | </varlistentry>
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| 369 |
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| 370 | </variablelist>
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| 371 |
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| 372 | </sect2>
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[9dfc02f] | 373 |
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| 374 | </sect1>
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