[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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[e69c45b] | 66 | --disable-extras --disable-introspection</userinput></screen>
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[3a34893] | 67 |
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| 68 | <variablelist>
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| 69 | <title>The meaning of the new configure options</title>
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| 70 |
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| 71 | <varlistentry>
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| 72 | <term><parameter>--with-rootlibdir=/lib</parameter></term>
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| 73 | <listitem>
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| 74 | <para>This controls where the <filename
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| 75 | class="libraryfile">libudev</filename> library is installed. The
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| 76 | library needs to be in <filename class="directory">/lib</filename>
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| 77 | because it's used by Udev at boot time, before <filename
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| 78 | class="directory">/usr</filename> might be available, and the default
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| 79 | --rootlibdir is <filename class="directory">/usr/lib</filename>.</para>
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| 80 | </listitem>
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| 81 | </varlistentry>
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| 82 |
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| 83 | <!-- Note that libexecdir *MUST* stay /lib/udev, even on a 64-bit
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| 84 | / multilib system where udev is compiled for 64-bit. Other
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| 85 | packages require this exact path; the udev maintainers have
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| 86 | said this is part of the udev API. -->
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| 87 | <varlistentry>
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| 88 | <term><parameter>--libexecdir=/lib/udev</parameter></term>
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| 89 | <listitem>
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| 90 | <para>This controls where Udev-internal rules and helper programs
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| 91 | are installed.</para>
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| 92 | </listitem>
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| 93 | </varlistentry>
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| 94 |
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| 95 | <varlistentry>
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| 96 | <term><parameter>--disable-extras</parameter></term>
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| 97 | <listitem>
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| 98 | <para>This option prevents Udev from installing helper programs and
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| 99 | other extras which require more external libraries. These libraries
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| 100 | are not part of the base LFS system. See the Udev
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| 101 | <filename>README</filename> file for more information.</para>
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| 102 | </listitem>
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| 103 | </varlistentry>
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[e69c45b] | 104 |
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| 105 | <varlistentry>
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| 106 | <term><parameter>--disable-introspection</parameter></term>
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| 107 | <listitem>
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| 108 | <para>This option prevents Udev's instrospection feature, which
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| 109 | requires packages not installed as part of the base LFS system. See
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| 110 | the Udev <filename>README</filename> file for more information.</para>
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| 111 | </listitem>
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| 112 | </varlistentry>
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[3a34893] | 113 | </variablelist>
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[ddd5542] | 114 |
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[166a9db] | 115 | <para>Compile the package:</para>
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[0445a3d] | 116 |
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[166a9db] | 117 | <screen><userinput remap="make">make</userinput></screen>
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[81fd230] | 118 |
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[166a9db] | 119 | <para>This package does not come with a test suite.</para>
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[c226182] | 120 |
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[ddd5542] | 121 | <para>Install the package:</para>
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[9dfc02f] | 122 |
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[166a9db] | 123 | <screen><userinput remap="install">make install</userinput></screen>
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[09043c0] | 124 |
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[61e63d3] | 125 | <para>Udev has to be configured in order to work properly, as its default
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[166a9db] | 126 | configuration does not cover all devices. First install two extra rules
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[9faa3e2] | 127 | files from Udev to help support device-mapper and RAID setups:</para>
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| 128 |
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[68edbd40] | 129 | <screen><userinput remap="install">install -m644 -v rules/packages/64-*.rules \
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[d75c123] | 130 | /lib/udev/rules.d/</userinput></screen>
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[9faa3e2] | 131 |
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| 132 | <para>Now install a file to create symlinks for certain hand-held devices:</para>
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| 133 |
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[68edbd40] | 134 | <screen><userinput remap="install">install -m644 -v rules/packages/40-pilot-links.rules \
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[d75c123] | 135 | /lib/udev/rules.d/</userinput></screen>
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[9faa3e2] | 136 |
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[bb8939c] | 137 | <para>Now install a file to handle ISDN devices:</para>
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| 138 |
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| 139 | <screen><userinput remap="install">install -m644 -v rules/packages/40-isdn.rules \
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| 140 | /lib/udev/rules.d/</userinput></screen>
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| 141 |
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[9faa3e2] | 142 | <!-- There are more files available in the packages/ directory, if we want
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| 143 | to consider using them. Most are probably irrelevant to LFS though.
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| 144 | "alsa" isn't, but we already have those rules, using a better set of
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| 145 | matches. Most of the files in packages/ are for other architectures. -->
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| 146 |
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| 147 | <para>Now install the LFS-specific custom rules files:</para>
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[7eac3e32] | 148 |
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[0445a3d] | 149 | <screen><userinput remap="install">cd &udev-config;
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[7e6fb44] | 150 | make install</userinput></screen>
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| 151 |
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| 152 | <para>Install the documentation that explains the LFS-specific rules
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| 153 | files:</para>
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| 154 |
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[0445a3d] | 155 | <screen><userinput remap="install">make install-doc</userinput></screen>
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[7e6fb44] | 156 |
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[ddd5542] | 157 | </sect2>
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| 158 |
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| 159 | <sect2 id="contents-udev" role="content">
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| 160 | <title>Contents of Udev</title>
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| 161 |
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| 162 | <segmentedlist>
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| 163 | <segtitle>Installed programs</segtitle>
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[2791a8e] | 164 | <segtitle>Installed libraries</segtitle>
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[ddd5542] | 165 | <segtitle>Installed directory</segtitle>
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| 166 |
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| 167 | <seglistitem>
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[61e63d3] | 168 | <seg>ata_id, cdrom_id, collect, create_floppy_devices, edd_id,
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| 169 | firmware.sh, fstab_import, path_id, scsi_id, udevadm, udevd,
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[3a34893] | 170 | usb_id, write_cd_rules, and write_net_rules</seg>
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[5f7456b] | 171 | <seg>libudev.{a,so}</seg>
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[ddd5542] | 172 | <seg>/etc/udev</seg>
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| 173 | </seglistitem>
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| 174 | </segmentedlist>
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| 175 |
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| 176 | <variablelist>
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| 177 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 178 | <?dbfo list-presentation="list"?>
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| 179 | <?dbhtml list-presentation="table"?>
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| 180 |
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[d2c332bc] | 181 | <varlistentry id="ata_id">
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| 182 | <term><command>ata_id</command></term>
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| 183 | <listitem>
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| 184 | <para>Provides Udev with a unique string and
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| 185 | additional information (uuid, label) for an ATA drive</para>
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| 186 | <indexterm zone="ch-system-udev ata_id">
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| 187 | <primary sortas="b-ata_id">ata_id</primary>
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| 188 | </indexterm>
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| 189 | </listitem>
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| 190 | </varlistentry>
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| 191 |
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| 192 | <varlistentry id="cdrom_id">
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| 193 | <term><command>cdrom_id</command></term>
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| 194 | <listitem>
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| 195 | <para>Provides Udev with the capabilities of a
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| 196 | CD-ROM or DVD-ROM drive</para>
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| 197 | <indexterm zone="ch-system-udev cdrom_id">
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| 198 | <primary sortas="b-cdrom_id">cdrom_id</primary>
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| 199 | </indexterm>
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| 200 | </listitem>
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| 201 | </varlistentry>
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| 202 |
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[61e63d3] | 203 | <varlistentry id="collect">
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| 204 | <term><command>collect</command></term>
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| 205 | <listitem>
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| 206 | <para>Given an ID for the current uevent and a list of
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| 207 | IDs (for all target uevents), registers the current ID
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| 208 | and indicates whether all target IDs have been registered</para>
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| 209 | <indexterm zone="ch-system-udev collect">
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| 210 | <primary sortas="b-collect">collect</primary>
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| 211 | </indexterm>
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| 212 | </listitem>
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| 213 | </varlistentry>
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| 214 |
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[d2c332bc] | 215 | <varlistentry id="create_floppy_devices">
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| 216 | <term><command>create_floppy_devices</command></term>
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[ddd5542] | 217 | <listitem>
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[d2c332bc] | 218 | <para>Creates all possible floppy devices based on the CMOS type</para>
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| 219 | <indexterm zone="ch-system-udev create_floppy_devices">
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| 220 | <primary sortas="b-create_floppy_devices">create_floppy_devices</primary>
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[ddd5542] | 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="edd_id">
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| 226 | <term><command>edd_id</command></term>
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[ddd5542] | 227 | <listitem>
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[d2c332bc] | 228 | <para>Provides Udev with the EDD ID for a BIOS disk drive</para>
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| 229 | <indexterm zone="ch-system-udev edd_id">
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| 230 | <primary sortas="b-edd_id">edd_id</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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[2791a8e] | 235 | <varlistentry id="firmware.sh">
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| 236 | <term><command>firmware.sh</command></term>
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[ddd5542] | 237 | <listitem>
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[d2c332bc] | 238 | <para>Uploads firmware to devices</para>
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[2791a8e] | 239 | <indexterm zone="ch-system-udev firmware.sh">
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| 240 | <primary sortas="b-firmware.sh">firmware.sh</primary>
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[d2c332bc] | 241 | </indexterm>
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| 242 | </listitem>
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| 243 | </varlistentry>
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| 244 |
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[61e63d3] | 245 | <varlistentry id="fstab_import">
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| 246 | <term><command>fstab_import</command></term>
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| 247 | <listitem>
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| 248 | <para>Finds an entry in <filename>/etc/fstab</filename> that
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| 249 | matches the current device, and provides its information to
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| 250 | Udev</para>
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| 251 | <indexterm zone="ch-system-udev fstab_import">
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| 252 | <primary sortas="b-fstab_import">fstab_import</primary>
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| 253 | </indexterm>
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| 254 | </listitem>
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| 255 | </varlistentry>
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| 256 |
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[7d6d34b] | 257 | <varlistentry id="path_id">
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| 258 | <term><command>path_id</command></term>
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| 259 | <listitem>
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[9058aa1] | 260 | <para>Provides the shortest possible unique hardware path to a
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[7d6d34b] | 261 | device</para>
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| 262 | <indexterm zone="ch-system-udev path_id">
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| 263 | <primary sortas="b-path_id">path_id</primary>
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| 264 | </indexterm>
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| 265 | </listitem>
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| 266 | </varlistentry>
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| 267 |
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[d2c332bc] | 268 | <varlistentry id="scsi_id">
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| 269 | <term><command>scsi_id</command></term>
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| 270 | <listitem>
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| 271 | <para>Provides Udev with a unique SCSI identifier
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| 272 | based on the data returned from sending a SCSI INQUIRY command to
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| 273 | the specified device</para>
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| 274 | <indexterm zone="ch-system-udev scsi_id">
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| 275 | <primary sortas="b-scsi_id">scsi_id</primary>
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[ddd5542] | 276 | </indexterm>
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| 277 | </listitem>
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| 278 | </varlistentry>
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| 279 |
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[61e63d3] | 280 | <varlistentry id="udevadm">
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| 281 | <term><command>udevadm</command></term>
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[ddd5542] | 282 | <listitem>
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[61e63d3] | 283 | <para>Generic udev administration tool: controls the udevd daemon,
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| 284 | provides info from the Udev database, monitors uevents, waits for
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| 285 | uevents to finish, tests Udev configuration, and triggers uevents
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| 286 | for a given device</para>
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| 287 | <indexterm zone="ch-system-udev udevadm">
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| 288 | <primary sortas="b-udevadm">udevadm</primary>
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[ddd5542] | 289 | </indexterm>
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| 290 | </listitem>
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| 291 | </varlistentry>
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| 292 |
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| 293 | <varlistentry id="udevd">
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| 294 | <term><command>udevd</command></term>
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| 295 | <listitem>
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[d2c332bc] | 296 | <para>A daemon that listens for uevents on the netlink socket,
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| 297 | creates devices and runs the configured external programs in
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| 298 | response to these uevents</para>
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[ddd5542] | 299 | <indexterm zone="ch-system-udev udevd">
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| 300 | <primary sortas="b-udevd">udevd</primary>
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| 301 | </indexterm>
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| 302 | </listitem>
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| 303 | </varlistentry>
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| 304 |
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[d2c332bc] | 305 | <varlistentry id="usb_id">
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| 306 | <term><command>usb_id</command></term>
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[ddd5542] | 307 | <listitem>
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[d2c332bc] | 308 | <para>Provides Udev with information about USB
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| 309 | devices</para>
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| 310 | <indexterm zone="ch-system-udev usb_id">
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| 311 | <primary sortas="b-usb_id">usb_id</primary>
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[ddd5542] | 312 | </indexterm>
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| 313 | </listitem>
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| 314 | </varlistentry>
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| 315 |
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[2791a8e] | 316 | <varlistentry id="write_cd_rules">
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| 317 | <term><command>write_cd_rules</command></term>
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| 318 | <listitem>
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| 319 | <para>A script which generates Udev rules to provide stable names for
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| 320 | optical drives (see also <xref linkend="ch-scripts-symlinks"/>)</para>
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| 321 | <indexterm zone="ch-system-udev write_cd_rules">
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| 322 | <primary sortas="b-write_cd_rules">write_cd_rules</primary>
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| 323 | </indexterm>
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| 324 | </listitem>
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| 325 | </varlistentry>
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| 326 |
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| 327 | <varlistentry id="write_net_rules">
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| 328 | <term><command>write_net_rules</command></term>
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| 329 | <listitem>
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| 330 | <para>A script which generates rules to provide stable names for
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| 331 | network interfaces (see also <xref linkend="ch-scripts-network"/>)
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| 332 | </para>
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| 333 | <indexterm zone="ch-system-udev write_net_rules">
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| 334 | <primary sortas="b-write_net_rules">write_net_rules</primary>
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| 335 | </indexterm>
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| 336 | </listitem>
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| 337 | </varlistentry>
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| 338 |
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[166a9db] | 339 | <varlistentry id="libudev">
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[5f7456b] | 340 | <term><filename class="libraryfile">libudev</filename></term>
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[166a9db] | 341 | <listitem>
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| 342 | <para>A library interface to udev device information</para>
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| 343 | <indexterm zone="ch-system-udev libudev">
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| 344 | <primary sortas="c-libudev">libudev</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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[ddd5542] | 349 | <varlistentry id="etc-udev">
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| 350 | <term><filename class="directory">/etc/udev</filename></term>
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| 351 | <listitem>
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[9058aa1] | 352 | <para>Contains Udev configuration files,
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[ddd5542] | 353 | device permissions, and rules for device naming</para>
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| 354 | <indexterm zone="ch-system-udev etc-udev">
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| 355 | <primary sortas="e-/etc/udev">/etc/udev</primary>
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| 356 | </indexterm>
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| 357 | </listitem>
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| 358 | </varlistentry>
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| 359 |
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| 360 | </variablelist>
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| 361 |
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| 362 | </sect2>
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[9dfc02f] | 363 |
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| 364 | </sect1>
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