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-<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
- "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-
-<refentry id="udevadm">
- <refentryinfo>
- <title>udevadm</title>
- <productname>systemd</productname>
- <authorgroup>
- <author>
- <contrib>Developer</contrib>
- <firstname>Kay</firstname>
- <surname>Sievers</surname>
- <email>kay@vrfy.org</email>
- </author>
- </authorgroup>
- </refentryinfo>
-
- <refmeta>
- <refentrytitle>udevadm</refentrytitle>
- <manvolnum>8</manvolnum>
- </refmeta>
-
- <refnamediv>
- <refname>udevadm</refname><refpurpose>udev management tool</refpurpose>
- </refnamediv>
-
- <refsynopsisdiv>
- <cmdsynopsis>
- <command>udevadm</command>
- <arg><option>--debug</option></arg>
- <arg><option>--version</option></arg>
- <arg><option>--help</option></arg>
- </cmdsynopsis>
- <cmdsynopsis>
- <command>udevadm info <replaceable>options</replaceable></command>
- </cmdsynopsis>
- <cmdsynopsis>
- <command>udevadm trigger <optional>options</optional></command>
- </cmdsynopsis>
- <cmdsynopsis>
- <command>udevadm settle <optional>options</optional></command>
- </cmdsynopsis>
- <cmdsynopsis>
- <command>udevadm control <replaceable>command</replaceable></command>
- </cmdsynopsis>
- <cmdsynopsis>
- <command>udevadm monitor <optional>options</optional></command>
- </cmdsynopsis>
- <cmdsynopsis>
- <command>udevadm test <optional>options</optional> <replaceable>devpath</replaceable></command>
- </cmdsynopsis>
- <cmdsynopsis>
- <command>udevadm test-builtin <optional>options</optional> <replaceable>command</replaceable> <replaceable>devpath</replaceable></command>
- </cmdsynopsis>
- </refsynopsisdiv>
-
- <refsect1><title>Description</title>
- <para><command>udevadm</command> expects a command and command
- specific options. It controls the runtime behavior of
- <command>systemd-udevd</command>, requests kernel events, manages
- the event queue, and provides simple debugging mechanisms.</para>
- </refsect1>
-
- <refsect1><title>Options</title>
- <variablelist>
- <varlistentry>
- <term><option>--debug</option></term>
- <listitem>
- <para>Print debug messages to standard error.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>--version</option></term>
- <listitem>
- <para>Print version number.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-h</option></term>
- <term><option>--help</option></term>
- <listitem>
- <para>Print help text.</para>
- </listitem>
- </varlistentry>
- </variablelist>
-
- <refsect2><title>udevadm info
- <arg choice="opt"><replaceable>options</replaceable></arg>
- <arg choice="opt"><replaceable>devpath</replaceable>|<replaceable>file</replaceable></arg>
- </title>
-
- <para>Queries the udev database for device information
- stored in the udev database. It can also query the properties
- of a device from its sysfs representation to help creating udev
- rules that match this device.</para>
- <variablelist>
- <varlistentry>
- <term><option>-q</option></term>
- <term><option>--query=<replaceable>TYPE</replaceable></option></term>
- <listitem>
- <para>Query the database for the specified type of device
- data. It needs the <option>--path</option> or
- <option>--name</option> to identify the specified device.
- Valid <replaceable>TYPE</replaceable>s are:
- <constant>name</constant>, <constant>symlink</constant>,
- <constant>path</constant>, <constant>property</constant>,
- <constant>all</constant>.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-p</option></term>
- <term><option>--path=<replaceable>DEVPATH</replaceable></option></term>
- <listitem>
- <para>The <filename>/sys</filename> path of the device to
- query, e.g.
- <filename><optional>/sys</optional>/class/block/sda</filename>.
- Note that this option usually is not very useful, since
- <command>udev</command> can guess the type of the
- argument, so <command>udevadm
- --devpath=/class/block/sda</command> is equivalent to
- <command>udevadm /sys/class/block/sda</command>.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-n</option></term>
- <term><option>--name=<replaceable>FILE</replaceable></option></term>
- <listitem>
- <para>The name of the device node or a symlink to query,
- e.g. <filename><optional>/dev</optional>/sda</filename>.
- Note that this option usually is not very useful, since
- <command>udev</command> can guess the type of the
- argument, so <command>udevadm --name=sda</command> is
- equivalent to <command>udevadm /dev/sda</command>.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-r</option></term>
- <term><option>--root</option></term>
- <listitem>
- <para>Print absolute paths in <command>name</command> or <command>symlink</command>
- query.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-a</option></term>
- <term><option>--attribute-walk</option></term>
- <listitem>
- <para>Print all sysfs properties of the specified device that can be used
- in udev rules to match the specified device. It prints all devices
- along the chain, up to the root of sysfs that can be used in udev rules.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-x</option></term>
- <term><option>--export</option></term>
- <listitem>
- <para>Print output as key/value pairs. Values are enclosed in single quotes.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-P</option></term>
- <term><option>--export-prefix=<replaceable>NAME</replaceable></option></term>
- <listitem>
- <para>Add a prefix to the key name of exported values.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-d</option></term>
- <term><option>--device-id-of-file=<replaceable>FILE</replaceable></option></term>
- <listitem>
- <para>Print major/minor numbers of the underlying device, where the file
- lives on.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-e</option></term>
- <term><option>--export-db</option></term>
- <listitem>
- <para>Export the content of the udev database.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-c</option></term>
- <term><option>--cleanup-db</option></term>
- <listitem>
- <para>Cleanup the udev database.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>--version</option></term>
- <listitem>
- <para>Print version.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-h</option></term>
- <term><option>--help</option></term>
- <listitem>
- <para>Print help text.</para>
- </listitem>
- </varlistentry>
- </variablelist>
-
- <para>In addition an optional positional argument can be used
- to specify a device name or a sys path. It must start with
- <filename>/dev</filename> or <filename>/sys</filename>
- respectively.</para>
- </refsect2>
-
- <refsect2><title>udevadm trigger
- <arg choice="opt"><replaceable>options</replaceable></arg>
- <arg choice="opt" rep="repeat"><replaceable>devpath</replaceable>|<replaceable>file</replaceable></arg></title>
- <para>Request device events from the kernel. Primarily used to replay events at system coldplug time.</para>
- <variablelist>
- <varlistentry>
- <term><option>-v</option></term>
- <term><option>--verbose</option></term>
- <listitem>
- <para>Print the list of devices which will be triggered.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-n</option></term>
- <term><option>--dry-run</option></term>
- <listitem>
- <para>Do not actually trigger the event.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-t</option></term>
- <term><option>--type=<replaceable>TYPE</replaceable></option></term>
- <listitem>
- <para>Trigger a specific type of devices. Valid types are:
- <command>devices</command>, <command>subsystems</command>.
- The default value is <command>devices</command>.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-c</option></term>
- <term><option>--action=<replaceable>ACTION</replaceable></option></term>
- <listitem>
- <para>Type of event to be triggered. The default value is
- <command>change</command>.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-s</option></term>
- <term><option>--subsystem-match=<replaceable>SUBSYSTEM</replaceable></option></term>
- <listitem>
- <para>Trigger events for devices which belong to a
- matching subsystem. This option can be specified multiple
- times and supports shell style pattern matching.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-S</option></term>
- <term><option>--subsystem-nomatch=<replaceable>SUBSYSTEM</replaceable></option></term>
- <listitem>
- <para>Do not trigger events for devices which belong to a matching subsystem. This option
- can be specified multiple times and supports shell style pattern matching.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-a</option></term>
- <term><option>--attr-match=<replaceable>ATTRIBUTE</replaceable>=<replaceable>VALUE</replaceable></option></term>
- <listitem>
- <para>Trigger events for devices with a matching sysfs
- attribute. If a value is specified along with the
- attribute name, the content of the attribute is matched
- against the given value using shell style pattern
- matching. If no value is specified, the existence of the
- sysfs attribute is checked. This option can be specified
- multiple times.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-A</option></term>
- <term><option>--attr-nomatch=<replaceable>ATTRIBUTE</replaceable>=<replaceable>VALUE</replaceable></option></term>
- <listitem>
- <para>Do not trigger events for devices with a matching
- sysfs attribute. If a value is specified along with the
- attribute name, the content of the attribute is matched
- against the given value using shell style pattern
- matching. If no value is specified, the existence of the
- sysfs attribute is checked. This option can be specified
- multiple times.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-p</option></term>
- <term><option>--property-match=<replaceable>PROPERTY</replaceable>=<replaceable>VALUE</replaceable></option></term>
- <listitem>
- <para>Trigger events for devices with a matching property
- value. This option can be specified multiple times and
- supports shell style pattern matching.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-g</option></term>
- <term><option>--tag-match=<replaceable>PROPERTY</replaceable></option></term>
- <listitem>
- <para>Trigger events for devices with a matching tag. This
- option can be specified multiple times.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-y</option></term>
- <term><option>--sysname-match=<replaceable>PATH</replaceable></option></term>
- <listitem>
- <para>Trigger events for devices with a matching sys
- device path. This option can be specified multiple times
- and supports shell style pattern matching.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>--name-match=<replaceable>NAME</replaceable></option></term>
- <listitem>
- <para>Trigger events for devices with a matching
- device path. This options can be specified multiple
- times.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-b</option></term>
- <term><option>--parent-match=<replaceable>SYSPATH</replaceable></option></term>
- <listitem>
- <para>Trigger events for all children of a given
- device.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-h</option></term>
- <term><option>--help</option></term>
- <listitem>
- <para>Print help text.</para>
- </listitem>
- </varlistentry>
- </variablelist>
-
- <para>In addition optional positional arguments can be used
- to specify device names or sys paths. They must start with
- <filename>/dev</filename> or <filename>/sys</filename>
- respectively.</para>
- </refsect2>
-
- <refsect2><title>udevadm settle
- <arg choice="opt"><replaceable>options</replaceable></arg>
- </title>
- <para>Watches the udev event queue, and exits if all current events are handled.</para>
- <variablelist>
- <varlistentry>
- <term><option>-t</option></term>
- <term><option>--timeout=<replaceable>SECONDS</replaceable></option></term>
- <listitem>
- <para>Maximum number of seconds to wait for the event
- queue to become empty. The default value is 120 seconds. A
- value of 0 will check if the queue is empty and always
- return immediately.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-E</option></term>
- <term><option>--exit-if-exists=<replaceable>FILE</replaceable></option></term>
- <listitem>
- <para>Stop waiting if file exists.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-h</option></term>
- <term><option>--help</option></term>
- <listitem>
- <para>Print help text.</para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect2>
-
- <refsect2><title>udevadm control <replaceable>command</replaceable></title>
- <para>Modify the internal state of the running udev daemon.</para>
- <variablelist>
- <varlistentry>
- <term><option>-x</option></term>
- <term><option>--exit</option></term>
- <listitem>
- <para>Signal and wait for systemd-udevd to exit.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-l</option></term>
- <term><option>--log-priority=<replaceable>value</replaceable></option></term>
- <listitem>
- <para>Set the internal log level of
- <filename>systemd-udevd</filename>. Valid values are the
- numerical syslog priorities or their textual
- representations: <option>emerg</option>,
- <option>alert</option>, <option>crit</option>,
- <option>err</option>, <option>warning</option>,
- <option>notice</option>, <option>info</option>, and
- <option>debug</option>.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-s</option></term>
- <term><option>--stop-exec-queue</option></term>
- <listitem>
- <para>Signal systemd-udevd to stop executing new events. Incoming events
- will be queued.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-S</option></term>
- <term><option>--start-exec-queue</option></term>
- <listitem>
- <para>Signal systemd-udevd to enable the execution of events.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-R</option></term>
- <term><option>--reload</option></term>
- <listitem>
- <para>Signal systemd-udevd to reload the rules files and other databases like the kernel
- module index. Reloading rules and databases does not apply any changes to already
- existing devices; the new configuration will only be applied to new events.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-p</option></term>
- <term><option>--property=<replaceable>KEY</replaceable>=<replaceable>value</replaceable></option></term>
- <listitem>
- <para>Set a global property for all events.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-m</option></term>
- <term><option>--children-max=</option><replaceable>value</replaceable></term>
- <listitem>
- <para>Set the maximum number of events, systemd-udevd will handle at the
- same time.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>--timeout=</option><replaceable>seconds</replaceable></term>
- <listitem>
- <para>The maximum number of seconds to wait for a reply from systemd-udevd.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-h</option></term>
- <term><option>--help</option></term>
- <listitem>
- <para>Print help text.</para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect2>
-
- <refsect2><title>udevadm monitor
- <arg choice="opt"><replaceable>options</replaceable></arg>
- </title>
- <para>Listens to the kernel uevents and events sent out by a udev rule
- and prints the devpath of the event to the console. It can be used to analyze the
- event timing, by comparing the timestamps of the kernel uevent and the udev event.
- </para>
- <variablelist>
- <varlistentry>
- <term><option>-k</option></term>
- <term><option>--kernel</option></term>
- <listitem>
- <para>Print the kernel uevents.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-u</option></term>
- <term><option>--udev</option></term>
- <listitem>
- <para>Print the udev event after the rule processing.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-p</option></term>
- <term><option>--property</option></term>
- <listitem>
- <para>Also print the properties of the event.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-s</option></term>
- <term><option>--subsystem-match=<replaceable>string[/string]</replaceable></option></term>
- <listitem>
- <para>Filter events by subsystem[/devtype]. Only udev events with a matching subsystem value will pass.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-t</option></term>
- <term><option>--tag-match=<replaceable>string</replaceable></option></term>
- <listitem>
- <para>Filter events by property. Only udev events with a given tag attached will pass.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-h</option></term>
- <term><option>--help</option></term>
- <listitem>
- <para>Print help text.</para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect2>
-
- <refsect2><title>udevadm test
- <arg choice="opt"><replaceable>options</replaceable></arg>
- <arg><replaceable>devpath</replaceable></arg>
- </title>
- <para>Simulate a udev event run for the given device, and print debug output.</para>
- <variablelist>
- <varlistentry>
- <term><option>-a</option></term>
- <term><option>--action=<replaceable>string</replaceable></option></term>
- <listitem>
- <para>The action string.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-N</option></term>
- <term><option>--resolve-names=<constant>early</constant>|<constant>late</constant>|<constant>never</constant></option></term>
- <listitem>
- <para>Specify when udevadm should resolve names of users
- and groups. When set to <constant>early</constant> (the
- default), names will be resolved when the rules are
- parsed. When set to <constant>late</constant>, names will
- be resolved for every event. When set to
- <constant>never</constant>, names will never be resolved
- and all devices will be owned by root.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>-h</option></term>
- <term><option>--help</option></term>
- <listitem>
- <para>Print help text.</para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect2>
-
- <refsect2><title>udevadm test-builtin
- <arg choice="opt"><replaceable>options</replaceable></arg>
- <arg><replaceable>command</replaceable></arg>
- <arg><replaceable>devpath</replaceable></arg>
- </title>
- <para>Run a built-in command <replaceable>COMMAND</replaceable>
- for device <replaceable>DEVPATH</replaceable>, and print debug
- output.</para>
- <variablelist>
- <varlistentry>
- <term><option>-h</option></term>
- <term><option>--help</option></term>
- <listitem>
- <para>Print help text.</para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect2>
- </refsect1>
-
- <refsect1>
- <title>See Also</title>
- <para><citerefentry>
- <refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum>
- </citerefentry>,
- <citerefentry>
- <refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum>
- </citerefentry></para>
- </refsect1>
-</refentry>
~ianmdlvl / elogind.git / blobdiff