| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 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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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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| 7 |
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| 8 | <sect1 id="ch-system-udev" role="wrap">
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| 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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| 19 |
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| 20 | <para>The Udev package contains programs for dynamic creation of device
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| 21 | nodes.</para>
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| 22 |
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| 23 | </sect2>
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| 24 |
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| 25 | <sect2 role="installation">
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| 26 | <title>Installation of Udev</title>
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| 27 |
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| 28 | <para os="a">Compile the package:</para>
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| 29 |
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| 30 | <screen os="b"><userinput>make EXTRAS="extras/floppy extras/cdrom_id extras/firmware \
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| 31 | extras/scsi_id extras/volume_id extras/ata_id extras/usb_id \
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| 32 | extras/edd_id extras/collect extras/path_id"</userinput></screen>
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| 33 |
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| 34 | <variablelist os="c">
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| 35 | <title>The meaning of the make parameter:</title>
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| 36 |
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| 37 | <varlistentry>
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| 38 | <term><parameter>EXTRAS="extras/floppy extras/cdrom_id extras/firmware
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| 39 | extras/scsi_id extras/volume_id extras/ata_id extras/usb_id extras/edd_id
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| 40 | extras/collect extras/path_id"</parameter></term>
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| 41 | <listitem>
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| 42 | <para>This builds the helper applications that are used with
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| 43 | udev. The helper programs assist in correct handling of devices.</para>
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| 44 | </listitem>
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| 45 | </varlistentry>
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| 46 |
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| 47 | </variablelist>
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| 48 |
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| 49 | <para os="d">If you want to run the testsuite, you need to change
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| 50 | a hardcoded reference to the <command>test</command>
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| 51 | program:</para>
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| 52 |
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| 53 | <screen os="e"><userinput>sed -i 's@/usr/bin/test@/bin/test@' test/udev-test.pl</userinput></screen>
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| 54 |
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| 55 | <para os="f">To test the results, issue:
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| 56 | <userinput>make test</userinput>.</para>
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| 57 |
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| 58 | <para os="g">Install the package:</para>
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| 59 |
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| 60 | <screen os="h"><userinput>make DESTDIR=/ \
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| 61 | EXTRAS="extras/floppy extras/cdrom_id extras/firmware \
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| 62 | extras/scsi_id extras/volume_id extras/ata_id extras/usb_id \
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| 63 | extras/edd_id extras/collect extras/path_id" install</userinput></screen>
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| 64 |
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| 65 | <variablelist os="i">
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| 66 | <title>The meaning of the make parameter:</title>
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| 67 |
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| 68 | <varlistentry>
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| 69 | <term><parameter>DESTDIR=/</parameter></term>
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| 70 | <listitem>
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| 71 | <para>This prevents the Udev build process from killing any
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| 72 | <command>udevd</command> processes that may be running on the
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| 73 | system.</para>
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| 74 | </listitem>
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| 75 | </varlistentry>
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| 76 |
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| 77 | </variablelist>
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| 78 |
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| 79 | <para os="l">Install a necessary helper script:</para>
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| 80 |
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| 81 | <screen os="m"><userinput>install -v -m644 -D docs/writing_udev_rules/index.html \
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| 82 | /usr/share/doc/udev-&udev-version;/index.html</userinput></screen>
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| 83 |
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| 84 | <para os="n">Create a directory for storing firmware that can be
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| 85 | loaded by <command>udev</command>:</para>
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| 86 |
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| 87 | <screen os="o"><userinput>install -dv /lib/firmware</userinput></screen>
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| 88 |
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| 89 | <para os="p">Finally, remove the rules installed by Udev as we will be
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| 90 | installing custom Udev rules later:</para>
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| 91 |
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| 92 | <screen os="q"><userinput>rm -v /etc/udev/rules.d/*</userinput></screen>
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| 93 |
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| 94 | </sect2>
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| 95 |
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| 96 | <sect2 id="contents-udev" role="content">
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| 97 | <title>Contents of Udev</title>
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| 98 |
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| 99 | <segmentedlist>
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| 100 | <segtitle>Installed programs</segtitle>
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| 101 | <segtitle>Installed directory</segtitle>
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| 102 |
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| 103 | <seglistitem>
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| 104 | <seg>udevcontrol, udevd, udevinfo, udevmonitor, udevsend,
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| 105 | udevtest, and udevtrigger</seg>
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| 106 | <seg>/etc/udev</seg>
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| 107 | </seglistitem>
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| 108 | </segmentedlist>
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| 109 |
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| 110 | <variablelist>
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| 111 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 112 | <?dbfo list-presentation="list"?>
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| 113 | <?dbhtml list-presentation="table"?>
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| 114 |
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| 115 | <varlistentry id="udevcontrol">
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| 116 | <term><command>udevcontrol</command></term>
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| 117 | <listitem>
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| 118 | <para>Configures a number of options for the running
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| 119 | <command>udevd</command> daemon, such as the log level.</para>
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| 120 | <indexterm zone="ch-system-udev udevcontrol">
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| 121 | <primary sortas="b-udevcontrol">udevcontrol</primary>
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| 122 | </indexterm>
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| 123 | </listitem>
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| 124 | </varlistentry>
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| 125 |
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| 126 | <varlistentry id="udevd">
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| 127 | <term><command>udevd</command></term>
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| 128 | <listitem>
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| 129 | <para>A daemon that reorders hotplug events before submitting them to
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| 130 | <command>udev</command>,
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| 131 | thus avoiding various race conditions</para>
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| 132 | <indexterm zone="ch-system-udev udevd">
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| 133 | <primary sortas="b-udevd">udevd</primary>
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| 134 | </indexterm>
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| 135 | </listitem>
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| 136 | </varlistentry>
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| 137 |
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| 138 | <varlistentry id="udevinfo">
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| 139 | <term><command>udevinfo</command></term>
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| 140 | <listitem>
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| 141 | <para>Allows users to query the <command>udev</command> database for
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| 142 | information on any device currently present on the system; it also
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| 143 | provides a way to query any device in the <systemitem
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| 144 | class="filesystem">sysfs</systemitem> tree to help create udev
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| 145 | rules</para>
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| 146 | <indexterm zone="ch-system-udev udevinfo">
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| 147 | <primary sortas="b-udevinfo">udevinfo</primary>
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| 148 | </indexterm>
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| 149 | </listitem>
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| 150 | </varlistentry>
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| 151 |
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| 152 | <varlistentry id="udevmonitor">
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| 153 | <term><command>udevmonitor</command></term>
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| 154 | <listitem>
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| 155 | <para>Prints the event received from the kernel and the event which
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| 156 | <command>udev</command> sends out after rule processing</para>
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| 157 | <indexterm zone="ch-system-udev udevmonitor">
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| 158 | <primary sortas="b-udevmonitor">udevmonitor</primary>
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| 159 | </indexterm>
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| 160 | </listitem>
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| 161 | </varlistentry>
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| 162 |
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| 163 | <varlistentry id="udevsettle">
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| 164 | <term><command>udevsettle</command></term>
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| 165 | <listitem>
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| 166 | <para>Watches the Udev event queue and exits if all current uevents
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| 167 | have been handled</para>
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| 168 | <indexterm zone="ch-system-udev udevsettle">
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| 169 | <primary sortas="b-udevsettle">udevsettle</primary>
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| 170 | </indexterm>
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| 171 | </listitem>
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| 172 | </varlistentry>
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| 173 |
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| 174 | <varlistentry id="udevtest">
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| 175 | <term><command>udevtest</command></term>
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| 176 | <listitem>
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| 177 | <para>Simulates a <command>udev</command> run for the given device,
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| 178 | and prints out the name of the node the real <command>udev</command>
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| 179 | would have created or the name of the renamed network interface</para>
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| 180 | <indexterm zone="ch-system-udev udevtest">
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| 181 | <primary sortas="b-udevtest">udevtest</primary>
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| 182 | </indexterm>
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| 183 | </listitem>
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| 184 | </varlistentry>
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| 185 |
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| 186 | <varlistentry id="udevtrigger">
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| 187 | <term><command>udevtrigger</command></term>
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| 188 | <listitem>
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| 189 | <para>Walks the sysfs tree for devices that need to be added to the
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| 190 | system.</para>
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| 191 | <indexterm zone="ch-system-udev udevtrigger">
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| 192 | <primary sortas="b-udevtrigger">udevtrigger</primary>
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| 193 | </indexterm>
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| 194 | </listitem>
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| 195 | </varlistentry>
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| 196 |
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| 197 | <!-- helpers start here -->
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| 198 | <varlistentry id="ata_id">
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| 199 | <term><command>ata_id</command></term>
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| 200 | <listitem>
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| 201 | <para>Provides Udev with a unique string and additional
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| 202 | information (uuid, label) for an ATA drive</para>
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| 203 | <indexterm zone="ch-system-udev ata_id">
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| 204 | <primary sortas="b-ata_id">ata_id</primary>
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| 205 | </indexterm>
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| 206 | </listitem>
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| 207 | </varlistentry>
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| 208 |
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| 209 | <varlistentry id="cdrom_id">
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| 210 | <term><command>cdrom_id</command></term>
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| 211 | <listitem>
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| 212 | <para>Print the capabilities of a CDROM or DVDROM drive.</para>
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| 213 | <indexterm zone="ch-system-udev cdrom_id">
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| 214 | <primary sortas="b-cdrom_id">cdrom_id</primary>
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| 215 | </indexterm>
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| 216 | </listitem>
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| 217 | </varlistentry>
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| 218 |
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| 219 | <varlistentry id="create_floppy_devices">
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| 220 | <term><command>create_floppy_devices</command></term>
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| 221 | <listitem>
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| 222 | <para>Creates all possible floppy devices based on the CMOS type</para>
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| 223 | <indexterm zone="ch-system-udev create_floppy_devices">
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| 224 | <primary sortas="b-create_floppy_devices">create_floppy_devices</primary>
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| 225 | </indexterm>
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| 226 | </listitem>
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| 227 | </varlistentry>
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| 228 |
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| 229 | <varlistentry id="dasd_id">
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| 230 | <term><command>dasd_id</command></term>
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| 231 | <listitem>
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| 232 | <para>Read the label from an s390 block device.</para>
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| 233 | <indexterm zone="ch-system-udev dasd_id">
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| 234 | <primary sortas="b-dasd_id">dasd_id</primary>
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| 235 | </indexterm>
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| 236 | </listitem>
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| 237 | </varlistentry>
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| 238 |
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| 239 | <varlistentry id="edd_id">
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| 240 | <term><command>edd_id</command></term>
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| 241 | <listitem>
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| 242 | <para>Identify x86 disk drives from Enhanced Disk Drive calls.</para>
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| 243 | <indexterm zone="ch-system-udev edd_id">
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| 244 | <primary sortas="b-edd_id">edd_id</primary>
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| 245 | </indexterm>
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| 246 | </listitem>
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| 247 | </varlistentry>
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| 248 |
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| 249 | <varlistentry id="firmware.sh">
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| 250 | <term><command>firmware.sh</command></term>
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| 251 | <listitem>
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| 252 | <para>Script to load firmware for a device</para>
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| 253 | <indexterm zone="ch-system-udev firmware.sh">
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| 254 | <primary sortas="b-firmware.sh">firmware.sh</primary>
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| 255 | </indexterm>
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| 256 | </listitem>
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| 257 | </varlistentry>
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| 258 |
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| 259 | <varlistentry id="path_id">
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| 260 | <term><command>path_id</command></term>
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| 261 | <listitem>
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| 262 | <para>Provide the shortest possible unique hardware path to a
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| 263 | device</para>
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| 264 | <indexterm zone="ch-system-udev path_id">
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| 265 | <primary sortas="b-path_id">path_id</primary>
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| 266 | </indexterm>
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| 267 | </listitem>
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| 268 | </varlistentry>
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| 269 |
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| 270 | <varlistentry id="scsi_id">
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| 271 | <term><command>scsi_id</command></term>
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| 272 | <listitem>
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| 273 | <para>Retrieve or generate a unique SCSI identifier.</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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| 276 | </indexterm>
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| 277 | </listitem>
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| 278 | </varlistentry>
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| 279 |
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| 280 | <varlistentry id="usb_id">
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| 281 | <term><command>usb_id</command></term>
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| 282 | <listitem>
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| 283 | <para>Identify a USB block device.</para>
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| 284 | <indexterm zone="ch-system-udev usb_id">
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| 285 | <primary sortas="b-usb_id">usb_id</primary>
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| 286 | </indexterm>
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| 287 | </listitem>
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| 288 | </varlistentry>
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| 289 |
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| 290 | <varlistentry id="vol_id">
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| 291 | <term><command>vol_id</command></term>
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| 292 | <listitem>
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| 293 | <para>Probe filesystem type and read label and uuid.</para>
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| 294 | <indexterm zone="ch-system-udev vol_id">
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| 295 | <primary sortas="b-vol_id">vol_id</primary>
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| 296 | </indexterm>
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| 297 | </listitem>
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| 298 | </varlistentry>
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| 299 |
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| 300 | <varlistentry id="etc-udev">
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| 301 | <term><filename class="directory">/etc/udev</filename></term>
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| 302 | <listitem>
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| 303 | <para>Contains <command>udev</command> configuration files,
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| 304 | device permissions, and rules for device naming</para>
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| 305 | <indexterm zone="ch-system-udev etc-udev">
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| 306 | <primary sortas="e-/etc/udev">/etc/udev</primary>
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| 307 | </indexterm>
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| 308 | </listitem>
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| 309 | </varlistentry>
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| 310 |
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| 311 | <varlistentry id="lib-udev">
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| 312 | <term><filename class="directory">/lib/udev</filename></term>
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| 313 | <listitem>
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| 314 | <para>Contains <command>udev</command> helper programs
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| 315 | and static devices which get copied to /dev when booted.</para>
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| 316 | <indexterm zone="ch-system-udev lib-udev">
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| 317 | <primary sortas="e-/lib/udev">/lib/udev</primary>
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| 318 | </indexterm>
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| 319 | </listitem>
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| 320 | </varlistentry>
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| 321 | </variablelist>
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| 322 |
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| 323 | </sect2>
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| 324 |
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| 325 | </sect1>
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