[9dfc02f] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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[ddd5542] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.4/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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| 11 | <title>Udev-&udev-version;</title>
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| 12 |
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| 13 | <indexterm zone="ch-system-udev">
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| 14 | <primary sortas="a-Udev">Udev</primary>
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| 15 | </indexterm>
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| 16 |
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| 17 | <sect2 role="package">
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| 18 | <title/>
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[9dfc02f] | 19 |
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[ddd5542] | 20 | <para>The Udev package contains programs for dynamic creation of device
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| 21 | nodes.</para>
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[9dfc02f] | 22 |
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[ddd5542] | 23 | <segmentedlist>
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| 24 | <segtitle>&buildtime;</segtitle>
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| 25 | <segtitle>&diskspace;</segtitle>
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[9dfc02f] | 26 |
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[ddd5542] | 27 | <seglistitem>
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[e4a5635] | 28 | <seg>&udev-ch6-sbu;</seg>
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| 29 | <seg>&udev-ch6-du;</seg>
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[ddd5542] | 30 | </seglistitem>
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| 31 | </segmentedlist>
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[9dfc02f] | 32 |
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[ddd5542] | 33 | </sect2>
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[9dfc02f] | 34 |
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[ddd5542] | 35 | <sect2 role="installation">
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| 36 | <title>Installation of Udev</title>
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| 37 |
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[7d6d34b] | 38 | <para>The udev-config tarball contains LFS-specific files used to configure
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[3a8e53b] | 39 | Udev. Unpack it into the Udev source directory:</para>
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[7d6d34b] | 40 |
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| 41 | <screen><userinput>tar xf ../&udev-config;.tar.bz2</userinput></screen>
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| 42 |
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[d2c332bc] | 43 | <para>Create some devices and directories that Udev cannot handle due to
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| 44 | them being required very early in the boot process:</para>
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| 45 |
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| 46 | <screen><userinput>install -dv /lib/{firmware,udev/devices/{pts,shm}}
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| 47 | mknod -m0666 /lib/udev/devices/null c 1 3
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| 48 | ln -sv /proc/self/fd /lib/udev/devices/fd
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| 49 | ln -sv /proc/self/fd/0 /lib/udev/devices/stdin
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| 50 | ln -sv /proc/self/fd/1 /lib/udev/devices/stdout
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| 51 | ln -sv /proc/self/fd/2 /lib/udev/devices/stderr
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| 52 | ln -sv /proc/kcore /lib/udev/devices/core</userinput></screen>
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| 53 |
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[ddd5542] | 54 | <para>Compile the package:</para>
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[9dfc02f] | 55 |
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[d2c332bc] | 56 | <screen><userinput>make EXTRAS="extras/ata_id extras/cdrom_id extras/edd_id \
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[7d6d34b] | 57 | extras/firmware extras/floppy extras/path_id \
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| 58 | extras/scsi_id extras/usb_id extras/volume_id"</userinput></screen>
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[81fd230] | 59 |
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[ddd5542] | 60 | <variablelist>
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| 61 | <title>The meaning of the make option:</title>
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| 62 |
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| 63 | <varlistentry>
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[d2c332bc] | 64 | <term><parameter>EXTRAS=...</parameter></term>
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[ddd5542] | 65 | <listitem>
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[d2c332bc] | 66 | <para>This builds several helper binaries that can aid in writing custom
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| 67 | Udev rules.</para>
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[ddd5542] | 68 | </listitem>
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| 69 | </varlistentry>
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[09043c0] | 70 |
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[ddd5542] | 71 | </variablelist>
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[09043c0] | 72 |
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[ddd5542] | 73 | <para>To test the results, issue:
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| 74 | <userinput>make test</userinput>.</para>
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[81fd230] | 75 |
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[b7368d5] | 76 | <para>Note that the Udev testsuite will produce numerous messages in
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| 77 | the host system's logs. These are harmless and can be ignored.</para>
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| 78 |
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[ddd5542] | 79 | <para>Install the package:</para>
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[9dfc02f] | 80 |
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[d2c332bc] | 81 | <screen><userinput>make DESTDIR=/ \
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| 82 | EXTRAS="extras/ata_id extras/cdrom_id extras/edd_id \
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[7d6d34b] | 83 | extras/firmware extras/floppy extras/path_id \
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| 84 | extras/scsi_id extras/usb_id extras/volume_id" install</userinput></screen>
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[09043c0] | 85 |
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[31294fd] | 86 | <beginpage/>
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| 87 |
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[ddd5542] | 88 | <variablelist>
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| 89 | <title>The meaning of the make parameter:</title>
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[09043c0] | 90 |
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[ddd5542] | 91 | <varlistentry>
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| 92 | <term><parameter>DESTDIR=/</parameter></term>
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| 93 | <listitem>
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| 94 | <para>This prevents the Udev build process from killing any
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| 95 | <command>udevd</command> processes that may be running on the
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| 96 | host system.</para>
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| 97 | </listitem>
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| 98 | </varlistentry>
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[9dfc02f] | 99 |
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[ddd5542] | 100 | </variablelist>
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| 101 |
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[8964be9] | 102 | <para>Udev has to be configured in order to work properly, as it does
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| 103 | not install any configuration files by default. Install the
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[a263c7a] | 104 | LFS-specific configuration files:</para>
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[18da154] | 105 |
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[3c19a9a] | 106 | <screen><userinput>cp -v &udev-config;/[0-9]* /etc/udev/rules.d/</userinput></screen>
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[18da154] | 107 |
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[ddd5542] | 108 | <para>Install the documentation that explains how to create Udev rules:</para>
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[7eac3e32] | 109 |
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[2c558d69] | 110 | <screen><userinput>install -m644 -D -v docs/writing_udev_rules/index.html \
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| 111 | /usr/share/doc/udev-&udev-version;/index.html</userinput></screen>
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[7eac3e32] | 112 |
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[ddd5542] | 113 | </sect2>
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| 114 |
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| 115 | <sect2 id="contents-udev" role="content">
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| 116 | <title>Contents of Udev</title>
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| 117 |
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| 118 | <segmentedlist>
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| 119 | <segtitle>Installed programs</segtitle>
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| 120 | <segtitle>Installed directory</segtitle>
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| 121 |
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| 122 | <seglistitem>
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[d2c332bc] | 123 | <seg>ata_id, cdrom_id, create_floppy_devices, edd_id, firmware_helper,
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[7d6d34b] | 124 | path_id, scsi_id, udevcontrol, udevd, udevinfo, udevmonitor, udevsettle,
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| 125 | udevtest, udevtrigger, usb_id, vol_id, and write_cd_aliases</seg>
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[ddd5542] | 126 | <seg>/etc/udev</seg>
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| 127 | </seglistitem>
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| 128 | </segmentedlist>
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| 129 |
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| 130 | <variablelist>
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| 131 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 132 | <?dbfo list-presentation="list"?>
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| 133 | <?dbhtml list-presentation="table"?>
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| 134 |
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[d2c332bc] | 135 | <varlistentry id="ata_id">
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| 136 | <term><command>ata_id</command></term>
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| 137 | <listitem>
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| 138 | <para>Provides Udev with a unique string and
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| 139 | additional information (uuid, label) for an ATA drive</para>
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| 140 | <indexterm zone="ch-system-udev ata_id">
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| 141 | <primary sortas="b-ata_id">ata_id</primary>
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| 142 | </indexterm>
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| 143 | </listitem>
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| 144 | </varlistentry>
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| 145 |
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| 146 | <varlistentry id="cdrom_id">
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| 147 | <term><command>cdrom_id</command></term>
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| 148 | <listitem>
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| 149 | <para>Provides Udev with the capabilities of a
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| 150 | CD-ROM or DVD-ROM drive</para>
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| 151 | <indexterm zone="ch-system-udev cdrom_id">
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| 152 | <primary sortas="b-cdrom_id">cdrom_id</primary>
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| 153 | </indexterm>
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| 154 | </listitem>
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| 155 | </varlistentry>
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| 156 |
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| 157 | <varlistentry id="create_floppy_devices">
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| 158 | <term><command>create_floppy_devices</command></term>
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[ddd5542] | 159 | <listitem>
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[d2c332bc] | 160 | <para>Creates all possible floppy devices based on the CMOS type</para>
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| 161 | <indexterm zone="ch-system-udev create_floppy_devices">
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| 162 | <primary sortas="b-create_floppy_devices">create_floppy_devices</primary>
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[ddd5542] | 163 | </indexterm>
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| 164 | </listitem>
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| 165 | </varlistentry>
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| 166 |
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[d2c332bc] | 167 | <varlistentry id="edd_id">
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| 168 | <term><command>edd_id</command></term>
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[ddd5542] | 169 | <listitem>
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[d2c332bc] | 170 | <para>Provides Udev with the EDD ID for a BIOS disk drive</para>
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| 171 | <indexterm zone="ch-system-udev edd_id">
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| 172 | <primary sortas="b-edd_id">edd_id</primary>
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[ddd5542] | 173 | </indexterm>
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| 174 | </listitem>
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| 175 | </varlistentry>
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| 176 |
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[d2c332bc] | 177 | <varlistentry id="firmware_helper">
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| 178 | <term><command>firmware_helper</command></term>
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[ddd5542] | 179 | <listitem>
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[d2c332bc] | 180 | <para>Uploads firmware to devices</para>
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| 181 | <indexterm zone="ch-system-udev firmware_helper">
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| 182 | <primary sortas="b-firmware_helper">firmware_helper</primary>
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| 183 | </indexterm>
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| 184 | </listitem>
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| 185 | </varlistentry>
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| 186 |
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[7d6d34b] | 187 | <varlistentry id="path_id">
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| 188 | <term><command>path_id</command></term>
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| 189 | <listitem>
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| 190 | <para>Provide the shortest possible unique hardware path to a
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| 191 | device</para>
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| 192 | <indexterm zone="ch-system-udev path_id">
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| 193 | <primary sortas="b-path_id">path_id</primary>
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| 194 | </indexterm>
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| 195 | </listitem>
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| 196 | </varlistentry>
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| 197 |
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[d2c332bc] | 198 | <varlistentry id="scsi_id">
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| 199 | <term><command>scsi_id</command></term>
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| 200 | <listitem>
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| 201 | <para>Provides Udev with a unique SCSI identifier
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| 202 | based on the data returned from sending a SCSI INQUIRY command to
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| 203 | the specified device</para>
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| 204 | <indexterm zone="ch-system-udev scsi_id">
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| 205 | <primary sortas="b-scsi_id">scsi_id</primary>
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[ddd5542] | 206 | </indexterm>
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| 207 | </listitem>
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| 208 | </varlistentry>
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| 209 |
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| 210 | <varlistentry id="udevcontrol">
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| 211 | <term><command>udevcontrol</command></term>
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| 212 | <listitem>
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| 213 | <para>Configures a number of options for the running
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| 214 | <command>udevd</command> daemon, such as the log level.</para>
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| 215 | <indexterm zone="ch-system-udev udevcontrol">
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| 216 | <primary sortas="b-udevcontrol">udevcontrol</primary>
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| 217 | </indexterm>
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| 218 | </listitem>
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| 219 | </varlistentry>
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| 220 |
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| 221 | <varlistentry id="udevd">
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| 222 | <term><command>udevd</command></term>
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| 223 | <listitem>
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[d2c332bc] | 224 | <para>A daemon that listens for uevents on the netlink socket,
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| 225 | creates devices and runs the configured external programs in
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| 226 | response to these uevents</para>
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[ddd5542] | 227 | <indexterm zone="ch-system-udev udevd">
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| 228 | <primary sortas="b-udevd">udevd</primary>
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| 229 | </indexterm>
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| 230 | </listitem>
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| 231 | </varlistentry>
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| 232 |
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| 233 | <varlistentry id="udevinfo">
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| 234 | <term><command>udevinfo</command></term>
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| 235 | <listitem>
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[d2c332bc] | 236 | <para>Allows users to query the Udev database for
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[ddd5542] | 237 | information on any device currently present on the system; it also
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| 238 | provides a way to query any device in the <systemitem
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| 239 | class="filesystem">sysfs</systemitem> tree to help create udev
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| 240 | rules</para>
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| 241 | <indexterm zone="ch-system-udev udevinfo">
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| 242 | <primary sortas="b-udevinfo">udevinfo</primary>
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| 243 | </indexterm>
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| 244 | </listitem>
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| 245 | </varlistentry>
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| 246 |
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| 247 | <varlistentry id="udevmonitor">
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| 248 | <term><command>udevmonitor</command></term>
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| 249 | <listitem>
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[d2c332bc] | 250 | <para>Prints the event received from the kernel and the environment
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| 251 | which Udev sends out after rule processing</para>
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[ddd5542] | 252 | <indexterm zone="ch-system-udev udevmonitor">
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| 253 | <primary sortas="b-udevmonitor">udevmonitor</primary>
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| 254 | </indexterm>
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| 255 | </listitem>
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| 256 | </varlistentry>
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| 257 |
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[7d6d34b] | 258 | <varlistentry id="udevsettle">
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| 259 | <term><command>udevsettle</command></term>
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| 260 | <listitem>
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| 261 | <para>Watches the Udev event queue and exits if all current uevents
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| 262 | have been handled</para>
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| 263 | <indexterm zone="ch-system-udev udevsettle">
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| 264 | <primary sortas="b-udevsettle">udevsettle</primary>
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| 265 | </indexterm>
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| 266 | </listitem>
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| 267 | </varlistentry>
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| 268 |
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[d2c332bc] | 269 | <varlistentry id="udevtest">
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| 270 | <term><command>udevtest</command></term>
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[ddd5542] | 271 | <listitem>
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[d2c332bc] | 272 | <para>Simulates a uevent for the given device, and prints out the
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| 273 | name of the node the real <command>udevd</command> would have created,
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| 274 | or the name of the renamed network interface</para>
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| 275 | <indexterm zone="ch-system-udev udevtest">
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| 276 | <primary sortas="b-udevtest">udevtest</primary>
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[ddd5542] | 277 | </indexterm>
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| 278 | </listitem>
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| 279 | </varlistentry>
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| 280 |
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[7d6d34b] | 281 | <varlistentry id="udevtrigger">
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| 282 | <term><command>udevtrigger</command></term>
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| 283 | <listitem>
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| 284 | <para>Triggers kernel device uevents to be replayed</para>
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| 285 | <indexterm zone="ch-system-udev udevtrigger">
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| 286 | <primary sortas="b-udevtrigger">udevtrigger</primary>
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| 287 | </indexterm>
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| 288 | </listitem>
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| 289 | </varlistentry>
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| 290 |
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[d2c332bc] | 291 | <varlistentry id="usb_id">
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| 292 | <term><command>usb_id</command></term>
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[ddd5542] | 293 | <listitem>
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[d2c332bc] | 294 | <para>Provides Udev with information about USB
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| 295 | devices</para>
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| 296 | <indexterm zone="ch-system-udev usb_id">
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| 297 | <primary sortas="b-usb_id">usb_id</primary>
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[ddd5542] | 298 | </indexterm>
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| 299 | </listitem>
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| 300 | </varlistentry>
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| 301 |
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[d2c332bc] | 302 | <varlistentry id="vol_id">
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| 303 | <term><command>vol_id</command></term>
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[ddd5542] | 304 | <listitem>
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[d2c332bc] | 305 | <para>Provides Udev with the label and uuid of a
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| 306 | filesystem</para>
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| 307 | <indexterm zone="ch-system-udev vol_id">
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| 308 | <primary sortas="b-vol_id">vol_id</primary>
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[ddd5542] | 309 | </indexterm>
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| 310 | </listitem>
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| 311 | </varlistentry>
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| 312 |
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| 313 | <varlistentry id="etc-udev">
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| 314 | <term><filename class="directory">/etc/udev</filename></term>
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| 315 | <listitem>
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[d2c332bc] | 316 | <para>Contains Udev configuation files,
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[ddd5542] | 317 | device permissions, and rules for device naming</para>
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| 318 | <indexterm zone="ch-system-udev etc-udev">
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| 319 | <primary sortas="e-/etc/udev">/etc/udev</primary>
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| 320 | </indexterm>
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| 321 | </listitem>
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| 322 | </varlistentry>
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| 323 |
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| 324 | </variablelist>
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| 325 |
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| 326 | </sect2>
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[9dfc02f] | 327 |
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| 328 | </sect1>
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