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380 lines
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380 lines
16 KiB
XML
<?xml version='1.0'?>
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<!DOCTYPE article 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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<article>
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<section>
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<title>udevadm</title>
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<refentry>
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<refentryinfo>
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<title>udevd</title>
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<date>November 2007</date>
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<productname>udev</productname>
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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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<refmiscinfo class="version"></refmiscinfo>
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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 info <optional>options</optional></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 <optional>options</optional> <replaceable>instruction</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 version</command>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>udevadm help</command>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1><title>DESCRIPTION</title>
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<para>udevadm expects a command and command specific options. It
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controls the runtime behavior of udev, requests kernel events,
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manages 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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<refsect2><title>udevadm info <replaceable>options</replaceable></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>--query=<replaceable>type</replaceable></option></term>
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<listitem>
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<para>Query the database for specified type of device data. It needs the
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<option>--path</option> or <option>--name</option> to identify the specified
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device. Valid queries are:
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<command>name</command>, <command>symlink</command>, <command>path</command>,
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<command>env</command>, <command>all</command>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--path=<replaceable>devpath</replaceable></option></term>
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<listitem>
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<para>The devpath of the device to query.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--root</option></term>
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<listitem>
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<para>The udev root directory: <filename>/dev</filename>. If used in conjunction
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with a <command>name</command> or <command>symlink</command> query, the
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query returns the absolute path including the root directory.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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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>--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>--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>--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>--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 trigger <optional>options</optional></title>
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<para>Request device uevents, usually used to replay events at system coldplug.</para>
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<variablelist>
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<varlistentry>
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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>--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>--retry-failed</option></term>
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<listitem>
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<para>Trigger only the events which are failed during a previous run.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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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 "add".</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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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 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>--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>--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 attribute. If a value is specified
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along with the attribute name, the content of the attribute is matched against the given
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value using shell style pattern matching. If no value is specified, the existence of the
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sysfs attribute is checked. This 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>--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 sysfs attribute. If a value is
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specified along with the attribute name, the content of the attribute is matched against
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the given value using shell style pattern matching. If no value is specified, the existence
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of the sysfs attribute is checked. This 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>--socket=<replaceable>path</replaceable></option></term>
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<listitem>
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<para>Pass the synthesized events to the specified socket, instead of triggering
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a global kernel event. All available event values will be send in the same format
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the kernel sends an uevent, or <option>RUN+="socket:<replaceable>path</replaceable>"</option>
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sends a message. If the first character of the specified path is an @ character,
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an abstract namespace socket is used, instead of an existing socket file.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--env=<replaceable>KEY</replaceable>=<replaceable>value</replaceable></option></term>
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<listitem>
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<para>Pass an additional environemt key to the event. This works only with the
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--socket option.</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 settle <optional>options</optional></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>--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 queue to become empty.
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The default value is 180 seconds.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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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>--log_priority=<replaceable>value</replaceable></option></term>
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<listitem>
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<para>Set the internal log level of udevd. Valid values are the numerical
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syslog priorities or their textual representations: <option>err</option>,
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<option>info</option> and <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>--stop_exec_queue</option></term>
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<listitem>
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<para>Signal 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>--start_exec_queue</option></term>
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<listitem>
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<para>Signal 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>--reload_rules</option></term>
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<listitem>
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<para>Signal udevd to reload the rules from the config.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--env=<replaceable>KEY</replaceable>=<replaceable>value</replaceable></option></term>
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<listitem>
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<para>Set global variable.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--max_childs=</option><replaceable>value</replaceable></term>
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<listitem>
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<para>Set the maximum number of events, 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>--max_childs_running=<replaceable>value</replaceable></option></term>
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<listitem>
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<para>Set the maximum number of events, which are allowed to run 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>--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 monitor <optional>options</optional></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>
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<variablelist>
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<varlistentry>
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<term><option>--environment</option></term>
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<listitem>
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<para>Print the complete environment for all events. Can be used to compare the
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kernel supplied and the udev added environment values.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--kernel</option></term>
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<listitem>
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<para>Print the kernel uevents.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--udev</option></term>
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<listitem>
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<para>Print the udev event after the rule processing.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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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 test <optional>options</optional> <replaceable>devpath</replaceable></title>
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<para>Simulate a udev event run for the given device, and print out debug
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output. Unless forced to, no device node or symlink will be created.</para>
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<variablelist>
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<varlistentry>
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<term><option>--action=<replaceable>string</replaceable></option></term>
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<listitem>
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<para>The action string.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--subsystem=<replaceable>string</replaceable></option></term>
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<listitem>
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<para>The subsystem string.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--force</option></term>
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<listitem>
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<para>Force the creation of a device node or symlink. Usually the test run
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prints only debug output.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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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 version</title>
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<para>Print version number.</para>
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</refsect2>
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<refsect2><title>udevadm help</title>
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<para>Print help text.</para>
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</refsect2>
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</refsect1>
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<refsect1><title>AUTHOR</title>
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<para>Written by Kay Sievers <email>kay.sievers@vrfy.org</email>.</para>
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</refsect1>
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<refsect1>
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<title>SEE ALSO</title>
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<para><citerefentry>
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<refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum>
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</citerefentry>
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<citerefentry>
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<refentrytitle>udevd</refentrytitle><manvolnum>8</manvolnum>
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</citerefentry></para>
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</refsect1>
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</refentry>
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</section>
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</article>
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