mirror of
https://github.com/systemd/systemd.git
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65eb4378c3
This pulls out the hwdb managment from udevadm into an independent tool. The old code is left in place for backwards compatibility, and easy of testing, but all documentation is dropped to encourage use of the new tool instead.
578 lines
23 KiB
XML
578 lines
23 KiB
XML
<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
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<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<refentry id="udevadm">
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<refentryinfo>
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<title>udevadm</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Kay</firstname>
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<surname>Sievers</surname>
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<email>kay@vrfy.org</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>udevadm</refentrytitle>
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<manvolnum>8</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>udevadm</refname><refpurpose>udev management tool</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>udevadm</command>
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<arg><option>--debug</option></arg>
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<arg><option>--version</option></arg>
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<arg><option>--help</option></arg>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>udevadm info <replaceable>options</replaceable></command>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>udevadm trigger <optional>options</optional></command>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>udevadm settle <optional>options</optional></command>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>udevadm control <replaceable>command</replaceable></command>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>udevadm monitor <optional>options</optional></command>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>udevadm test <optional>options</optional> <replaceable>devpath</replaceable></command>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>udevadm test-builtin <optional>options</optional> <replaceable>command</replaceable> <replaceable>devpath</replaceable></command>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1><title>Description</title>
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<para><command>udevadm</command> expects a command and command
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specific options. It controls the runtime behavior of
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<command>systemd-udevd</command>, requests kernel events, manages
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the event queue, and provides simple debugging mechanisms.</para>
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</refsect1>
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<refsect1><title>Options</title>
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<variablelist>
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<varlistentry>
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<term><option>--debug</option></term>
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<listitem>
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<para>Print debug messages to standard error.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--version</option></term>
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<listitem>
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<para>Print version number.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-h</option></term>
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<term><option>--help</option></term>
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<listitem>
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<para>Print help text.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<refsect2><title>udevadm info
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<arg choice="opt"><replaceable>options</replaceable></arg>
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<arg choice="opt"><replaceable>devpath</replaceable>|<replaceable>file</replaceable></arg>
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</title>
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<para>Queries the udev database for device information
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stored in the udev database. It can also query the properties
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of a device from its sysfs representation to help creating udev
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rules that match this device.</para>
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<variablelist>
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<varlistentry>
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<term><option>-q</option></term>
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<term><option>--query=<replaceable>TYPE</replaceable></option></term>
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<listitem>
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<para>Query the database for the specified type of device
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data. It needs the <option>--path</option> or
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<option>--name</option> to identify the specified device.
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Valid <replaceable>TYPE</replaceable>s are:
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<constant>name</constant>, <constant>symlink</constant>,
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<constant>path</constant>, <constant>property</constant>,
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<constant>all</constant>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-p</option></term>
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<term><option>--path=<replaceable>DEVPATH</replaceable></option></term>
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<listitem>
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<para>The <filename>/sys</filename> path of the device to
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query, e.g.
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<filename><optional>/sys</optional>/class/block/sda</filename>.
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Note that this option usually is not very useful, since
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<command>udev</command> can guess the type of the
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argument, so <command>udevadm
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--devpath=/class/block/sda</command> is equivalent to
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<command>udevadm /sys/class/block/sda</command>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-n</option></term>
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<term><option>--name=<replaceable>FILE</replaceable></option></term>
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<listitem>
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<para>The name of the device node or a symlink to query,
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e.g. <filename><optional>/dev</optional>/sda</filename>.
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Note that this option usually is not very useful, since
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<command>udev</command> can guess the type of the
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argument, so <command>udevadm --name=sda</command> is
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equivalent to <command>udevadm /dev/sda</command>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-r</option></term>
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<term><option>--root</option></term>
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<listitem>
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<para>Print absolute paths in <command>name</command> or <command>symlink</command>
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query.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-a</option></term>
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<term><option>--attribute-walk</option></term>
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<listitem>
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<para>Print all sysfs properties of the specified device that can be used
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in udev rules to match the specified device. It prints all devices
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along the chain, up to the root of sysfs that can be used in udev rules.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-x</option></term>
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<term><option>--export</option></term>
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<listitem>
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<para>Print output as key/value pairs. Values are enclosed in single quotes.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-P</option></term>
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<term><option>--export-prefix=<replaceable>NAME</replaceable></option></term>
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<listitem>
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<para>Add a prefix to the key name of exported values.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-d</option></term>
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<term><option>--device-id-of-file=<replaceable>FILE</replaceable></option></term>
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<listitem>
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<para>Print major/minor numbers of the underlying device, where the file
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lives on.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-e</option></term>
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<term><option>--export-db</option></term>
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<listitem>
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<para>Export the content of the udev database.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-c</option></term>
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<term><option>--cleanup-db</option></term>
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<listitem>
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<para>Cleanup the udev database.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--version</option></term>
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<listitem>
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<para>Print version.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-h</option></term>
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<term><option>--help</option></term>
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<listitem>
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<para>Print help text.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>In addition an optional positional argument can be used
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to specify a device name or a sys path. It must start with
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<filename>/dev</filename> or <filename>/sys</filename>
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respectively.</para>
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</refsect2>
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<refsect2><title>udevadm trigger
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<arg choice="opt"><replaceable>options</replaceable></arg>
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<arg choice="opt" rep="repeat"><replaceable>devpath</replaceable>|<replaceable>file</replaceable></arg></title>
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<para>Request device events from the kernel. Primarily used to replay events at system coldplug time.</para>
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<variablelist>
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<varlistentry>
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<term><option>-v</option></term>
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<term><option>--verbose</option></term>
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<listitem>
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<para>Print the list of devices which will be triggered.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-n</option></term>
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<term><option>--dry-run</option></term>
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<listitem>
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<para>Do not actually trigger the event.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-t</option></term>
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<term><option>--type=<replaceable>TYPE</replaceable></option></term>
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<listitem>
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<para>Trigger a specific type of devices. Valid types are:
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<command>devices</command>, <command>subsystems</command>.
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The default value is <command>devices</command>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-c</option></term>
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<term><option>--action=<replaceable>ACTION</replaceable></option></term>
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<listitem>
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<para>Type of event to be triggered. The default value is
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<command>change</command>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-s</option></term>
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<term><option>--subsystem-match=<replaceable>SUBSYSTEM</replaceable></option></term>
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<listitem>
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<para>Trigger events for devices which belong to a
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matching subsystem. This option can be specified multiple
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times and supports shell style pattern matching.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-S</option></term>
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<term><option>--subsystem-nomatch=<replaceable>SUBSYSTEM</replaceable></option></term>
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<listitem>
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<para>Do not trigger events for devices which belong to a matching subsystem. This option
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can be specified multiple times and supports shell style pattern matching.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-a</option></term>
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<term><option>--attr-match=<replaceable>ATTRIBUTE</replaceable>=<replaceable>VALUE</replaceable></option></term>
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<listitem>
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<para>Trigger events for devices with a matching sysfs
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attribute. If a value is specified along with the
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attribute name, the content of the attribute is matched
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against the given value using shell style pattern
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matching. If no value is specified, the existence of the
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sysfs attribute is checked. This option can be specified
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multiple times.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-A</option></term>
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<term><option>--attr-nomatch=<replaceable>ATTRIBUTE</replaceable>=<replaceable>VALUE</replaceable></option></term>
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<listitem>
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<para>Do not trigger events for devices with a matching
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sysfs attribute. If a value is specified along with the
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attribute name, the content of the attribute is matched
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against the given value using shell style pattern
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matching. If no value is specified, the existence of the
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sysfs attribute is checked. This option can be specified
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multiple times.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-p</option></term>
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<term><option>--property-match=<replaceable>PROPERTY</replaceable>=<replaceable>VALUE</replaceable></option></term>
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<listitem>
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<para>Trigger events for devices with a matching property
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value. This option can be specified multiple times and
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supports shell style pattern matching.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-g</option></term>
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<term><option>--tag-match=<replaceable>PROPERTY</replaceable></option></term>
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<listitem>
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<para>Trigger events for devices with a matching tag. This
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option can be specified multiple times.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-y</option></term>
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<term><option>--sysname-match=<replaceable>PATH</replaceable></option></term>
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<listitem>
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<para>Trigger events for devices with a matching sys
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device path. This option can be specified multiple times
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and supports shell style pattern matching.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--name-match=<replaceable>NAME</replaceable></option></term>
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<listitem>
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<para>Trigger events for devices with a matching
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device path. This options can be specified multiple
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times.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-b</option></term>
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<term><option>--parent-match=<replaceable>SYSPATH</replaceable></option></term>
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<listitem>
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<para>Trigger events for all children of a given
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device.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-h</option></term>
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<term><option>--help</option></term>
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<listitem>
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<para>Print help text.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>In addition optional positional arguments can be used
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to specify device names or sys paths. They must start with
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<filename>/dev</filename> or <filename>/sys</filename>
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respectively.</para>
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</refsect2>
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<refsect2><title>udevadm settle
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<arg choice="opt"><replaceable>options</replaceable></arg>
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</title>
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<para>Watches the udev event queue, and exits if all current events are handled.</para>
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<variablelist>
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<varlistentry>
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<term><option>-t</option></term>
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<term><option>--timeout=<replaceable>SECONDS</replaceable></option></term>
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<listitem>
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<para>Maximum number of seconds to wait for the event
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queue to become empty. The default value is 120 seconds. A
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value of 0 will check if the queue is empty and always
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return immediately.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-E</option></term>
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<term><option>--exit-if-exists=<replaceable>FILE</replaceable></option></term>
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<listitem>
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<para>Stop waiting if file exists.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-h</option></term>
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<term><option>--help</option></term>
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<listitem>
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<para>Print help text.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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<refsect2><title>udevadm control <replaceable>command</replaceable></title>
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<para>Modify the internal state of the running udev daemon.</para>
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<variablelist>
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<varlistentry>
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<term><option>-x</option></term>
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<term><option>--exit</option></term>
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<listitem>
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<para>Signal and wait for systemd-udevd to exit.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-l</option></term>
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<term><option>--log-priority=<replaceable>value</replaceable></option></term>
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<listitem>
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<para>Set the internal log level of
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<filename>systemd-udevd</filename>. Valid values are the
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numerical syslog priorities or their textual
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representations: <option>emerg</option>,
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<option>alert</option>, <option>crit</option>,
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<option>err</option>, <option>warning</option>,
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<option>notice</option>, <option>info</option>, and
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<option>debug</option>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-s</option></term>
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<term><option>--stop-exec-queue</option></term>
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<listitem>
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<para>Signal systemd-udevd to stop executing new events. Incoming events
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will be queued.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-S</option></term>
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<term><option>--start-exec-queue</option></term>
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<listitem>
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<para>Signal systemd-udevd to enable the execution of events.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-R</option></term>
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<term><option>--reload</option></term>
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<listitem>
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<para>Signal systemd-udevd to reload the rules files and other databases like the kernel
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module index. Reloading rules and databases does not apply any changes to already
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existing devices; the new configuration will only be applied to new events.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-p</option></term>
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<term><option>--property=<replaceable>KEY</replaceable>=<replaceable>value</replaceable></option></term>
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<listitem>
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<para>Set a global property for all events.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-m</option></term>
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<term><option>--children-max=</option><replaceable>value</replaceable></term>
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<listitem>
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<para>Set the maximum number of events, systemd-udevd will handle at the
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same time.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--timeout=</option><replaceable>seconds</replaceable></term>
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<listitem>
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<para>The maximum number of seconds to wait for a reply from systemd-udevd.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-h</option></term>
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<term><option>--help</option></term>
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<listitem>
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<para>Print help text.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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|
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<refsect2><title>udevadm monitor
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<arg choice="opt"><replaceable>options</replaceable></arg>
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</title>
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<para>Listens to the kernel uevents and events sent out by a udev rule
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and prints the devpath of the event to the console. It can be used to analyze the
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event timing, by comparing the timestamps of the kernel uevent and the udev event.
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</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>
|