| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 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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| 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/dasd_id 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/dasd_id 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/dasd_id 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="i">Install a necessary helper script:</para>
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| 80 |
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| 81 | <screen os="j"><userinput>install -v extras/eventrecorder.sh /lib/udev</userinput></screen>
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| 82 |
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| 83 | <para os="l">Install the documentation that explains how to create
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| 84 | Udev rules:</para>
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| 85 |
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| 86 | <screen os="m"><userinput>install -v -m644 -D docs/writing_udev_rules/index.html \
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| 87 | /usr/share/doc/udev-&udev-version;/index.html</userinput></screen>
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| 88 |
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| 89 | <para os="n">Create a directory for storing firmware that can be
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| 90 | loaded by <command>udev</command>:</para>
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| 91 |
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| 92 | <screen os="o"><userinput>install -dv /lib/firmware</userinput></screen>
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| 93 |
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| 94 | <para os="p">Finally, remove the rules installed by Udev as we will be
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| 95 | installing custom Udev rules later:</para>
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| 96 |
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| 97 | <screen os="q">rm /etc/udev/rules.d/*</screen>
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| 98 |
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| 99 | </sect2>
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| 100 |
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| 101 | <sect2 id="contents-udev" role="content">
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| 102 | <title>Contents of Udev</title>
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| 103 |
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| 104 | <segmentedlist>
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| 105 | <segtitle>Installed programs</segtitle>
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| 106 | <segtitle>Installed directory</segtitle>
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| 107 |
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| 108 | <seglistitem>
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| 109 | <seg>udevcontrol, udevd, udevinfo, udevmonitor, udevsend,
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| 110 | udevtest, and udevtrigger</seg>
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| 111 | <seg>/etc/udev</seg>
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| 112 | </seglistitem>
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| 113 | </segmentedlist>
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| 114 |
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| 115 | <variablelist>
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| 116 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 117 | <?dbfo list-presentation="list"?>
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| 118 | <?dbhtml list-presentation="table"?>
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| 119 |
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| 120 | <varlistentry id="udevcontrol">
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| 121 | <term><command>udevcontrol</command></term>
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| 122 | <listitem>
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| 123 | <para>Configures a number of options for the running
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| 124 | <command>udevd</command> daemon, such as the log level.</para>
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| 125 | <indexterm zone="ch-system-udev udevcontrol">
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| 126 | <primary sortas="b-udevcontrol">udevcontrol</primary>
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| 127 | </indexterm>
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| 128 | </listitem>
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| 129 | </varlistentry>
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| 130 |
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| 131 | <varlistentry id="udevd">
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| 132 | <term><command>udevd</command></term>
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| 133 | <listitem>
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| 134 | <para>A daemon that reorders hotplug events before submitting them to
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| 135 | <command>udev</command>,
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| 136 | thus avoiding various race conditions</para>
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| 137 | <indexterm zone="ch-system-udev udevd">
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| 138 | <primary sortas="b-udevd">udevd</primary>
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| 139 | </indexterm>
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| 140 | </listitem>
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| 141 | </varlistentry>
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| 142 |
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| 143 | <varlistentry id="udevinfo">
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| 144 | <term><command>udevinfo</command></term>
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| 145 | <listitem>
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| 146 | <para>Allows users to query the <command>udev</command> database for
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| 147 | information on any device currently present on the system; it also
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| 148 | provides a way to query any device in the <systemitem
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| 149 | class="filesystem">sysfs</systemitem> tree to help create udev
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| 150 | rules</para>
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| 151 | <indexterm zone="ch-system-udev udevinfo">
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| 152 | <primary sortas="b-udevinfo">udevinfo</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="udevmonitor">
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| 158 | <term><command>udevmonitor</command></term>
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| 159 | <listitem>
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| 160 | <para>Prints the event received from the kernel and the event which
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| 161 | <command>udev</command> sends out after rule processing</para>
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| 162 | <indexterm zone="ch-system-udev udevmonitor">
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| 163 | <primary sortas="b-udevmonitor">udevmonitor</primary>
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| 164 | </indexterm>
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| 165 | </listitem>
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| 166 | </varlistentry>
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| 167 |
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| 168 | <varlistentry id="udevsettle">
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| 169 | <term><command>udevsettle</command></term>
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| 170 | <listitem>
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| 171 | <para>Watches the Udev event queue and exits if all current uevents
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| 172 | have been handled</para>
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| 173 | <indexterm zone="ch-system-udev udevsettle">
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| 174 | <primary sortas="b-udevsettle">udevsettle</primary>
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| 175 | </indexterm>
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| 176 | </listitem>
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| 177 | </varlistentry>
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| 178 |
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| 179 | <varlistentry id="udevtest">
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| 180 | <term><command>udevtest</command></term>
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| 181 | <listitem>
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| 182 | <para>Simulates a <command>udev</command> run for the given device,
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| 183 | and prints out the name of the node the real <command>udev</command>
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| 184 | would have created or the name of the renamed network interface</para>
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| 185 | <indexterm zone="ch-system-udev udevtest">
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| 186 | <primary sortas="b-udevtest">udevtest</primary>
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| 187 | </indexterm>
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| 188 | </listitem>
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| 189 | </varlistentry>
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| 190 |
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| 191 | <varlistentry id="udevtrigger">
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| 192 | <term><command>udevtrigger</command></term>
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| 193 | <listitem>
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| 194 | <para>Walks the sysfs tree for devices that need to be added to the
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| 195 | system.</para>
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| 196 | <indexterm zone="ch-system-udev udevtrigger">
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| 197 | <primary sortas="b-udevtrigger">udevtrigger</primary>
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| 198 | </indexterm>
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| 199 | </listitem>
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| 200 | </varlistentry>
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| 201 |
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| 202 | <!-- helpers start here -->
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| 203 | <varlistentry id="ata_id">
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| 204 | <term><command>ata_id</command></term>
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| 205 | <listitem>
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| 206 | <para>Provides Udev with a unique string and additional
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| 207 | information (uuid, label) for an ATA drive</para>
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| 208 | <indexterm zone="ch-system-udev ata_id">
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| 209 | <primary sortas="b-ata_id">ata_id</primary>
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| 210 | </indexterm>
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| 211 | </listitem>
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| 212 | </varlistentry>
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| 213 |
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| 214 | <varlistentry id="cdrom_id">
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| 215 | <term><command>cdrom_id</command></term>
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| 216 | <listitem>
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| 217 | <para>Print the capabilities of a CDROM or DVDROM drive.</para>
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| 218 | <indexterm zone="ch-system-udev cdrom_id">
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| 219 | <primary sortas="b-cdrom_id">cdrom_id</primary>
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| 220 | </indexterm>
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| 221 | </listitem>
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| 222 | </varlistentry>
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| 223 |
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| 224 | <varlistentry id="create_floppy_devices">
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| 225 | <term><command>create_floppy_devices</command></term>
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| 226 | <listitem>
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| 227 | <para>Creates all possible floppy devices based on the CMOS type</para>
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| 228 | <indexterm zone="ch-system-udev create_floppy_devices">
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| 229 | <primary sortas="b-create_floppy_devices">create_floppy_devices</primary>
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| 230 | </indexterm>
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| 231 | </listitem>
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| 232 | </varlistentry>
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| 233 |
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| 234 | <varlistentry id="dasd_id">
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| 235 | <term><command>dasd_id</command></term>
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| 236 | <listitem>
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| 237 | <para>Read the label from an s390 block device.</para>
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| 238 | <indexterm zone="ch-system-udev dasd_id">
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| 239 | <primary sortas="b-dasd_id">dasd_id</primary>
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| 240 | </indexterm>
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| 241 | </listitem>
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| 242 | </varlistentry>
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| 243 |
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| 244 | <varlistentry id="edd_id">
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| 245 | <term><command>edd_id</command></term>
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| 246 | <listitem>
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| 247 | <para>Identify x86 disk drives from Enhanced Disk Drive calls.</para>
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| 248 | <indexterm zone="ch-system-udev edd_id">
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| 249 | <primary sortas="b-edd_id">edd_id</primary>
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| 250 | </indexterm>
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| 251 | </listitem>
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| 252 | </varlistentry>
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| 253 |
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| 254 | <varlistentry id="firmware.sh">
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| 255 | <term><command>firmware.sh</command></term>
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| 256 | <listitem>
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| 257 | <para>Script to load firmware for a device</para>
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| 258 | <indexterm zone="ch-system-udev firmware.sh">
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| 259 | <primary sortas="b-firmware.sh">firmware.sh</primary>
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| 260 | </indexterm>
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| 261 | </listitem>
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| 262 | </varlistentry>
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| 263 |
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| 264 | <varlistentry id="path_id">
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| 265 | <term><command>path_id</command></term>
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| 266 | <listitem>
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| 267 | <para>Provide the shortest possible unique hardware path to a
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| 268 | device</para>
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| 269 | <indexterm zone="ch-system-udev path_id">
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| 270 | <primary sortas="b-path_id">path_id</primary>
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| 271 | </indexterm>
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| 272 | </listitem>
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| 273 | </varlistentry>
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| 274 |
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| 275 | <varlistentry id="scsi_id">
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| 276 | <term><command>scsi_id</command></term>
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| 277 | <listitem>
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| 278 | <para>Retrieve or generate a unique SCSI identifier.</para>
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| 279 | <indexterm zone="ch-system-udev scsi_id">
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| 280 | <primary sortas="b-scsi_id">scsi_id</primary>
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| 281 | </indexterm>
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| 282 | </listitem>
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| 283 | </varlistentry>
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| 284 |
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| 285 | <varlistentry id="usb_id">
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| 286 | <term><command>usb_id</command></term>
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| 287 | <listitem>
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| 288 | <para>Identify a USB block device.</para>
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| 289 | <indexterm zone="ch-system-udev usb_id">
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| 290 | <primary sortas="b-usb_id">usb_id</primary>
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| 291 | </indexterm>
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| 292 | </listitem>
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| 293 | </varlistentry>
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| 294 |
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| 295 | <varlistentry id="vol_id">
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| 296 | <term><command>vol_id</command></term>
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| 297 | <listitem>
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| 298 | <para>Probe filesystem type and read label and uuid.</para>
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| 299 | <indexterm zone="ch-system-udev vol_id">
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| 300 | <primary sortas="b-vol_id">vol_id</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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| 305 | <varlistentry id="etc-udev">
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| 306 | <term><filename class="directory">/etc/udev</filename></term>
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| 307 | <listitem>
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| 308 | <para>Contains <command>udev</command> configuration files,
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| 309 | device permissions, and rules for device naming</para>
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| 310 | <indexterm zone="ch-system-udev etc-udev">
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| 311 | <primary sortas="e-/etc/udev">/etc/udev</primary>
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| 312 | </indexterm>
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| 313 | </listitem>
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| 314 | </varlistentry>
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| 315 |
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| 316 | <varlistentry id="lib-udev">
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| 317 | <term><filename class="directory">/lib/udev</filename></term>
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| 318 | <listitem>
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| 319 | <para>Contains <command>udev</command> helper programs
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| 320 | and static devices which get copied to /dev when booted.</para>
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| 321 | <indexterm zone="ch-system-udev lib-udev">
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| 322 | <primary sortas="e-/lib/udev">/lib/udev</primary>
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| 323 | </indexterm>
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| 324 | </listitem>
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| 325 | </varlistentry>
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| 326 | </variablelist>
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| 327 |
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| 328 | </sect2>
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| 329 |
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| 330 | </sect1>
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