<refentry id="udevadm">
<refentryinfo>
<title>udevadm</title>
- <productname>udev</productname>
+ <productname>systemd</productname>
+ <authorgroup>
+ <author>
+ <contrib>Developer</contrib>
+ <firstname>Kay</firstname>
+ <surname>Sievers</surname>
+ <email>kay@vrfy.org</email>
+ </author>
+ </authorgroup>
</refentryinfo>
<refmeta>
<cmdsynopsis>
<command>udevadm monitor <optional>options</optional></command>
</cmdsynopsis>
+ <cmdsynopsis>
+ <command>udevadm hwdb <optional>options</optional></command>
+ </cmdsynopsis>
<cmdsynopsis>
<command>udevadm test <optional>options</optional> <replaceable>devpath</replaceable></command>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1><title>Description</title>
- <para>udevadm expects a command and command specific options. It
- controls the runtime behavior of udev, requests kernel events,
- manages the event queue, and provides simple debugging mechanisms.</para>
+ <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>
<varlistentry>
<term><option>--query=<replaceable>type</replaceable></option></term>
<listitem>
- <para>Query the database for specified type of device data. It needs the
- <option>--path</option> or <option>--name</option> to identify the specified
- device. Valid queries are:
- <command>name</command>, <command>symlink</command>, <command>path</command>,
- <command>property</command>, <command>all</command>.</para>
+ <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 queries are: <constant>name</constant>,
+ <constant>symlink</constant>, <constant>path</constant>,
+ <constant>property</constant>,
+ <constant>all</constant>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--path=<replaceable>devpath</replaceable></option></term>
<listitem>
- <para>The devpath of the device to query.</para>
+ <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>--name=<replaceable>file</replaceable></option></term>
<listitem>
- <para>The name of the device node or a symlink to query</para>
+ <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>--root</option></term>
<listitem>
- <para>The udev root directory: <filename>/dev</filename>. If used in conjunction
- with a <command>name</command> or <command>symlink</command> query, the
- query returns the absolute path including the root directory.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><option>--run</option></term>
- <listitem>
- <para>The udev runtime directory: <filename>/run/udev</filename>.</para>
+ <para>Print absolute paths in <command>name</command> or <command>symlink</command>
+ query.</para>
</listitem>
</varlistentry>
<varlistentry>
<varlistentry>
<term><option>--exit</option></term>
<listitem>
- <para>Signal and wait for udevd to exit.</para>
+ <para>Signal and wait for systemd-udevd to exit.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--log-priority=<replaceable>value</replaceable></option></term>
<listitem>
- <para>Set the internal log level of udevd. Valid values are the numerical
+ <para>Set the internal log level of systemd-udevd. Valid values are the numerical
syslog priorities or their textual representations: <option>err</option>,
<option>info</option> and <option>debug</option>.</para>
</listitem>
<varlistentry>
<term><option>--stop-exec-queue</option></term>
<listitem>
- <para>Signal udevd to stop executing new events. Incoming events
+ <para>Signal systemd-udevd to stop executing new events. Incoming events
will be queued.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--start-exec-queue</option></term>
<listitem>
- <para>Signal udevd to enable the execution of events.</para>
+ <para>Signal systemd-udevd to enable the execution of events.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--reload</option></term>
<listitem>
- <para>Signal udevd to reload the rules files and other databases like the kernel
+ <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>
<term><option>--children-max=</option><replaceable>value</replaceable></term>
<listitem>
- <para>Set the maximum number of events, udevd will handle at the
+ <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 seconds to wait for a reply from udevd.</para>
+ <para>The maximum number of seconds to wait for a reply from systemd-udevd.</para>
</listitem>
</varlistentry>
<varlistentry>
</variablelist>
</refsect2>
+ <refsect2><title>udevadm hwdb <optional>options</optional></title>
+ <para>Maintain the hardware database index in <filename>/etc/udev/hwdb.bin</filename>.</para>
+ <variablelist>
+ <varlistentry>
+ <term><option>--update</option></term>
+ <listitem>
+ <para>Compile the hardware database information located in /usr/lib/udev/hwdb.d/,
+ /etc/udev/hwdb.d/ and store it in <filename>/etc/udev/hwdb.bin</filename>. This should be done after
+ any update to the source files; it will not be called automatically. The running
+ udev daemon will detect a new database on its own and does not need to be
+ notified about it.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--test=<replaceable>string</replaceable></option></term>
+ <listitem>
+ <para>Query the database with a modalias string, and print the
+ retrieved properties.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--root=<replaceable>string</replaceable></option></term>
+ <listitem>
+ <para>Alternative root path in the filesystem for reading and writing files.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect2>
+
<refsect2><title>udevadm test <optional>options</optional> <replaceable>devpath</replaceable></title>
<para>Simulate a udev event run for the given device, and print debug output.</para>
<variablelist>
</listitem>
</varlistentry>
<varlistentry>
- <term><option>--subsystem=<replaceable>string</replaceable></option></term>
+ <term><option>--resolve-names=<constant>early</constant>|<constant>late</constant>|<constant>never</constant></option></term>
<listitem>
- <para>The subsystem string.</para>
+ <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>
</refsect2>
</refsect1>
- <refsect1><title>Author</title>
- <para>Written by Kay Sievers <email>kay.sievers@vrfy.org</email>.</para>
- </refsect1>
-
<refsect1>
<title>See Also</title>
<para><citerefentry>
<refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum>
</citerefentry>
<citerefentry>
- <refentrytitle>udevd</refentrytitle><manvolnum>8</manvolnum>
+ <refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum>
</citerefentry></para>
</refsect1>
</refentry>
~ianmdlvl / elogind.git / blobdiff