udev.xml revision 1495719024cae87fd42167ec77691ebb64ba20d7
220a21d38f675eb835f5758e3d23e896573aa5eaLennart Poettering<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
0f0467e63b0e0688ae9edb1512c1a2637d62ddb4Martin Pitt<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering <refentryinfo>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering </refentryinfo>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering <refpurpose>Linux dynamic device management</refpurpose>
c65514649680e5d5ee6a118db6e5b20438cb1710Ronny Chevalier </refnamediv>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering <para>udev supplies the system software with device events, manages permissions
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering of device nodes and may create additional symlinks in the <filename>/dev</filename>
0aee49d5fba2b2ec94e5c069d937004858a04b4fThomas Hindoe Paaboel Andersen directory, or renames network interfaces. The kernel usually just assigns unpredictable
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering device names based on the order of discovery. Meaningful symlinks or network device
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering names provide a way to reliably identify devices based on their properties or
0f0467e63b0e0688ae9edb1512c1a2637d62ddb4Martin Pitt current configuration.</para>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering <para>The udev daemon, <citerefentry><refentrytitle>udevd</refentrytitle>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering <manvolnum>8</manvolnum></citerefentry>, receives device uevents directly from
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering the kernel whenever a device is added or removed from the system, or it changes its
0aee49d5fba2b2ec94e5c069d937004858a04b4fThomas Hindoe Paaboel Andersen state. When udev receives a device event, it matches its configured set of rules
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering against various device attributes to identify the device. Rules that match may
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering provide additional device information to be stored in the udev database or
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering to be used to create meaningful symlink names.</para>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering <para>All device information udev processes is stored in the udev database and
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering sent out to possible event subscribers. Access to all stored data and the event
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering sources is provided by the library libudev.</para>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering <para>udev configuration files are placed in <filename>/etc/udev</filename>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering and <filename>/usr/lib/udev</filename>. All empty lines or lines beginning with
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering '#' are ignored.</para>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering <refsect2><title>Configuration file</title>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering <para>udev expects its main configuration file at <filename>/etc/udev/udev.conf</filename>.
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering It consists of a set of variables allowing the user to override default udev values.
0aee49d5fba2b2ec94e5c069d937004858a04b4fThomas Hindoe Paaboel Andersen The following variables can be set:</para>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering <variablelist>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering <varlistentry>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering <para>Specifies where to place the device nodes in the filesystem.
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering The default value is <filename>/dev</filename>.</para>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering </varlistentry>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering <varlistentry>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering <para>The logging priority. Valid values are the numerical syslog priorities
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering or their textual representations: <option>err</option>, <option>info</option>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering </varlistentry>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering </variablelist>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering <para>The udev rules are read from the files located in the
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering system rules directory <filename>/usr/lib/udev/rules.d</filename>,
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering the local administration directory <filename>/etc/udev/rules.d</filename>
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering and the volatile runtime directory <filename>/run/udev/rules.d</filename>.
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering All rules files are collectively sorted and processed in lexical order,
470e72d4081c7d0fd74666b7a45358d5ee2abee1Lennart Poettering regardless of the directories in which they live. However, files with
0aee49d5fba2b2ec94e5c069d937004858a04b4fThomas Hindoe Paaboel Andersen identical file names replace each other. Files in <filename>/run</filename>
0f0467e63b0e0688ae9edb1512c1a2637d62ddb4Martin Pitt have the highest priority, files in <filename>/etc</filename> take precedence
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering over files with the same name in <filename>/lib</filename>. This can be
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering used to overwrite a system rules file if needed; a symlink in
f7a73a2558bceffd983eb7642680e718cd981122David Herrmann <filename>/etc</filename> with the same name as a rules file in
f7a73a2558bceffd983eb7642680e718cd981122David Herrmann <filename>/lib</filename>, pointing to <filename>/dev/null</filename>,
f7a73a2558bceffd983eb7642680e718cd981122David Herrmann disables the rules file entirely.</para>
f7a73a2558bceffd983eb7642680e718cd981122David Herrmann <para>Rule files must have the extension <filename>.rules</filename>; other
f7a73a2558bceffd983eb7642680e718cd981122David Herrmann extensions are ignored.</para>
f7a73a2558bceffd983eb7642680e718cd981122David Herrmann <para>Every line in the rules file contains at least one key-value pair.
f7a73a2558bceffd983eb7642680e718cd981122David Herrmann There are two kind of keys: match and assignment.
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering If all match keys are matching against its value, the rule gets applied and the
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering assignment keys get the specified value assigned.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>A matching rule may rename a network interface, add symlinks
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering pointing to the device node, or run a specified program as part of
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering the event handling.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>A rule consists of a comma-separated list of one or more key-value pairs.
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering Each key has a distinct operation, depending on the used operator. Valid
29d1fcb4a3c921a3d4490353474e9775f7b13b0eZbigniew Jędrzejewski-Szmek operators are:</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <variablelist>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
29d1fcb4a3c921a3d4490353474e9775f7b13b0eZbigniew Jędrzejewski-Szmek <term><option>!=</option></term>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Assign a value to a key. Keys that represent a list are reset
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering and only this single value is assigned.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Add the value to a key that holds a list of entries.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Assign a value to a key finally; disallow any later changes.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </variablelist>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>The following key names can be used to match against device properties.
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering Some of the keys also match against properties of the parent devices in sysfs,
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering not only the device that has generated the event. If multiple keys that match
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering a parent device are specified in a single rule, all these keys must match at
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering one and the same parent device.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <variablelist>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
1579dd2c9b8f97e5ec4016d3928d73fea160e55aLennart Poettering <para>Match the name of the event action.</para>
1579dd2c9b8f97e5ec4016d3928d73fea160e55aLennart Poettering </varlistentry>
1579dd2c9b8f97e5ec4016d3928d73fea160e55aLennart Poettering <varlistentry>
1579dd2c9b8f97e5ec4016d3928d73fea160e55aLennart Poettering <para>Match the devpath of the event device.</para>
1579dd2c9b8f97e5ec4016d3928d73fea160e55aLennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Match the name of the event device.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Match the name of a network interface. It can be used once the
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering NAME key has been set in one of the preceding rules.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Match the name of a symlink targeting the node. It can
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering be used once a SYMLINK key has been set in one of the preceding
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering rules. There may be multiple symlinks; only one needs to match.
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Match the subsystem of the event device.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Match the driver name of the event device. Only set this key for devices
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering which are bound to a driver at the time the event is generated.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <term><option>ATTR{<replaceable>filename</replaceable>}</option></term>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Match sysfs attribute values of the event device. Trailing
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering whitespace in the attribute values is ignored unless the specified match
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering value itself contains trailing whitespace.
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Search the devpath upwards for a matching device name.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Search the devpath upwards for a matching device subsystem name.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Search the devpath upwards for a matching device driver name.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
1a2d5fbe7efa04181a2d5518bc510b84b280baf9David Herrmann <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <term><option>ATTRS{<replaceable>filename</replaceable>}</option></term>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Search the devpath upwards for a device with matching sysfs attribute values.
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering If multiple <option>ATTRS</option> matches are specified, all of them
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering must match on the same device. Trailing whitespace in the attribute values is ignored
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering unless the specified match value itself contains trailing whitespace.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Search the devpath upwards for a device with matching tag.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <term><option>ENV{<replaceable>key</replaceable>}</option></term>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Match against a device property value.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <term><option>TEST{<replaceable>octal mode mask</replaceable>}</option></term>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Test the existence of a file. An octal mode mask can be specified
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering if needed.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Execute a program to determine whether there
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering is a match; the key is true if the program returns
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering successfully. The device properties are made available to the
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering executed program in the environment. The program's stdout
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering is available in the RESULT key.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Match the returned string of the last PROGRAM call. This key can
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering be used in the same or in any later rule after a PROGRAM call.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </variablelist>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Most of the fields support shell-style pattern matching. The following
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering pattern characters are supported:</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <variablelist>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Matches zero or more characters.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Matches any single character.</para>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering </varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <varlistentry>
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering <para>Matches any single character specified within the brackets. For
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering example, the pattern string 'tty[SR]' would match either 'ttyS' or 'ttyR'.
39315f9f8dd5a16b4561c5efffc6114c75835011Lennart Poettering Ranges are also supported via the '-' character.
481a0aa2c9803a62cda413b8a1d05571957bb4b5Lennart Poettering For example, to match on the range of all digits, the pattern [0-9] could
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering be used. If the first character following the '[' is a '!', any characters
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering not enclosed are matched.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </variablelist>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>The following keys can get values assigned:</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <variablelist>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>The name to use for a network interface. The name of a device node
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering can not be changed by udev, only additional symlinks can be created.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>The name of a symlink targeting the node. Every matching rule adds
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering this value to the list of symlinks to be created. Multiple symlinks may be
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering specified by separating the names by the space character. In case multiple
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering devices claim the same name, the link always points to the device with
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering the highest link_priority. If the current device goes away, the links are
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering re-evaluated and the device with the next highest link_priority becomes the owner of
7edecf218e5884ec8d1549707b4c7a0572c2d93bThomas Hindoe Paaboel Andersen the link. If no link_priority is specified, the order of the devices (and
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering which one of them owns the link) is undefined. Also, symlink names must
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering never conflict with the kernel's default device node names, as that would
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering result in unpredictable behavior.
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <term><option>OWNER, GROUP, MODE</option></term>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>The permissions for the device node. Every specified value overwrites
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering the compiled-in default value.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <term><option>ATTR{<replaceable>key</replaceable>}</option></term>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>The value that should be written to a sysfs attribute of the
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering event device.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <term><option>ENV{<replaceable>key</replaceable>}</option></term>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Set a device property value. Property names with a leading '.'
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering are neither stored in the database nor exported to events or
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering external tools (run by, say, the PROGRAM match key).</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Attach a tag to a device. This is used to filter events for users
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering of libudev's monitor functionality, or to enumerate a group of tagged
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering devices. The implementation can only work efficiently if only a few
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering tags are attached to a device. It is only meant to be used in
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering contexts with specific device filter requirements, and not as a
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering general-purpose flag. Excessive use might result in inefficient event
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering handling.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Add a program to the list of programs to be executed for a specific
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering device. This can only be used for very short running tasks. Running an
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering event process for a long period of time may block all further events for
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering this or a dependent device. Long running tasks need to be immediately
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering detached from the event process itself.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>If no absolute path is given, the program is expected to live in
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering /usr/lib/udev, otherwise the absolute path must be specified. The program
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering name and following arguments are separated by spaces. Single quotes can
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering be used to specify arguments with spaces.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>A named label to which a GOTO may jump.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Jumps to the next LABEL with a matching name.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <term><option>IMPORT{<replaceable>type</replaceable>}</option></term>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Import a set of variables as device properties,
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering depending on <replaceable>type</replaceable>:</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <variablelist>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Execute an external program specified as the assigned value and
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering import its output, which must be in environment key
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering format. Path specification, command/argument separation,
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering and quoting work like in <option>RUN</option>.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Import a text file specified as the assigned value, the content
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering of which must be in environment key format.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Import a single property specified as the assigned value from the
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering current device database. This works only if the database is already populated
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering by an earlier event.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Import a single property from the kernel command line. For simple flags
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering the value of the property is set to '1'.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Import the stored keys from the parent device by reading
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering the database entry of the parent device. The value assigned to
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <option>IMPORT{parent}</option> is used as a filter of key names
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering to import (with the same shell-style pattern matching used for
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering comparisons).</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </variablelist>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Wait for a file to become available or until a timeout of
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering 10 seconds expires. The path is relative to the sysfs device;
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering if no path is specified, this waits for an attribute to appear.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <variablelist>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <term><option>link_priority=<replaceable>value</replaceable></option></term>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Specify the priority of the created symlinks. Devices with higher
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering priorities overwrite existing symlinks of other devices. The default is 0.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <term><option>event_timeout=</option></term>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Number of seconds an event waits for operations to finish before
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering giving up and terminating itself.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <term><option>string_escape=<replaceable>none|replace</replaceable></option></term>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Usually control and other possibly unsafe characters are replaced
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering in strings used for device naming. The mode of replacement can be specified
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering with this option.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <term><option>static_node=</option></term>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Apply the permissions specified in this rule to the static device node with
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering the specified name. Static device nodes might be provided by kernel modules
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering or copied from <filename>/usr/lib/udev/devices</filename>. These nodes might not have
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering a corresponding kernel device at the time udevd is started; they can trigger
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering automatic kernel module loading.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Watch the device node with inotify; when the node is closed after being opened for
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering writing, a change uevent is synthesized.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>Disable the watching of a device node with inotify.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </variablelist>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </variablelist>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>The <option>NAME</option>, <option>SYMLINK</option>, <option>PROGRAM</option>,
dd2fd155901a965ec0efa3adc460b33d2048d4c2Lennart Poettering <option>OWNER</option>, <option>GROUP</option>, <option>MODE</option> and <option>RUN</option>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering fields support simple string substitutions. The <option>RUN</option>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering substitutions are performed after all rules have been processed, right before the program
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering is executed, allowing for the use of device properties set by earlier matching
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering rules. For all other fields, substitutions are performed while the individual rule is
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering being processed. The available substitutions are:</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <variablelist>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <term><option>$kernel</option>, <option>%k</option></term>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>The kernel name for this device.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <term><option>$number</option>, <option>%n</option></term>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>The kernel number for this device. For example, 'sda3' has
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering kernel number of '3'</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <term><option>$devpath</option>, <option>%p</option></term>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <term><option>$id</option>, <option>%b</option></term>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>The name of the device matched while searching the devpath upwards for
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <option>SUBSYSTEMS</option>, <option>KERNELS</option>, <option>DRIVERS</option> and <option>ATTRS</option>.
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>The driver name of the device matched while searching the devpath upwards for
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <option>SUBSYSTEMS</option>, <option>KERNELS</option>, <option>DRIVERS</option> and <option>ATTRS</option>.
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <term><option>$attr{<replaceable>file</replaceable>}</option>, <option>%s{<replaceable>file</replaceable>}</option></term>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>The value of a sysfs attribute found at the device where
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering all keys of the rule have matched. If the matching device does not have
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering such an attribute, and a previous KERNELS, SUBSYSTEMS, DRIVERS, or
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering ATTRS test selected a parent device, then the attribute from that
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering parent device is used.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>If the attribute is a symlink, the last element of the symlink target is
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering returned as the value.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <term><option>$env{<replaceable>key</replaceable>}</option>, <option>%E{<replaceable>key</replaceable>}</option></term>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <term><option>$major</option>, <option>%M</option></term>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>The kernel major number for the device.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <varlistentry>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <term><option>$minor</option>, <option>%m</option></term>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering <para>The kernel minor number for the device.</para>
615aaf412c441e67c7cad2e5ae966b03fca1fae7Lennart Poettering </varlistentry>
11ea2781eea4b912d2feb26785ece475e504c57bLennart Poettering <varlistentry>
d2c643c662e2cb3b6d1445c17c80b4b2998d5c61Lennart Poettering <term><option>$result</option>, <option>%c</option></term>
d2c643c662e2cb3b6d1445c17c80b4b2998d5c61Lennart Poettering <para>The string returned by the external program requested with PROGRAM.
d2c643c662e2cb3b6d1445c17c80b4b2998d5c61Lennart Poettering A single part of the string, separated by a space character, may be selected
d2c643c662e2cb3b6d1445c17c80b4b2998d5c61Lennart Poettering by specifying the part number as an attribute: <option>%c{N}</option>.
d2c643c662e2cb3b6d1445c17c80b4b2998d5c61Lennart Poettering If the number is followed by the '+' character, this part plus all remaining parts
d2c643c662e2cb3b6d1445c17c80b4b2998d5c61Lennart Poettering of the result string are substituted: <option>%c{N+}</option></para>
d2c643c662e2cb3b6d1445c17c80b4b2998d5c61Lennart Poettering </varlistentry>
d2c643c662e2cb3b6d1445c17c80b4b2998d5c61Lennart Poettering <varlistentry>
d2c643c662e2cb3b6d1445c17c80b4b2998d5c61Lennart Poettering <term><option>$parent</option>, <option>%P</option></term>
d2c643c662e2cb3b6d1445c17c80b4b2998d5c61Lennart Poettering <para>The node name of the parent device.</para>
11ea2781eea4b912d2feb26785ece475e504c57bLennart Poettering </varlistentry>
11ea2781eea4b912d2feb26785ece475e504c57bLennart Poettering <varlistentry>
11ea2781eea4b912d2feb26785ece475e504c57bLennart Poettering <para>The current name of the device. If not changed by a rule, it is the
d2c643c662e2cb3b6d1445c17c80b4b2998d5c61Lennart Poettering name of the kernel device.</para>
11ea2781eea4b912d2feb26785ece475e504c57bLennart Poettering </varlistentry>
11ea2781eea4b912d2feb26785ece475e504c57bLennart Poettering <varlistentry>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering <para>A space-separated list of the current symlinks. The value is
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering only set during a remove event or if an earlier rule assigned a value.</para>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering </varlistentry>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering <varlistentry>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering <term><option>$root</option>, <option>%r</option></term>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering </varlistentry>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering <varlistentry>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering <term><option>$sys</option>, <option>%S</option></term>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering </varlistentry>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering <varlistentry>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering <term><option>$devnode</option>, <option>%N</option></term>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering <para>The name of the device node.</para>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering </varlistentry>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering <varlistentry>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering </varlistentry>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering <varlistentry>
122676c9d9737f8591429fd5ffc9b454a994741dLennart Poettering </varlistentry>
122676c9d9737f8591429fd5ffc9b454a994741dLennart Poettering </variablelist>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering <para>Written by Greg Kroah-Hartman <email>greg@kroah.com</email> and
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering Kay Sievers <email>kay.sievers@vrfy.org</email>. With much help from
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering Dan Stekloff and many others.</para>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering <refentrytitle>udevd</refentrytitle><manvolnum>8</manvolnum>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering </citerefentry>,
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering <citerefentry>
f9e00a9f5870a9bcae2de8bf1cb3ce04703112e1Lennart Poettering <refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum>