systemd/udev/udevd.xml

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<article>
  <section>
    <title>udevd</title>
    <refentry>
      <refentryinfo>
        <title>udevd</title>
        <date>August 2005</date>
        <productname>udev</productname>
      </refentryinfo>

      <refmeta>
        <refentrytitle>udevd</refentrytitle>
        <manvolnum>8</manvolnum>
        <refmiscinfo class="version"></refmiscinfo>
      </refmeta>

      <refnamediv>
        <refname>udevd</refname><refpurpose>event managing daemon</refpurpose>
      </refnamediv>

      <refsynopsisdiv>
        <cmdsynopsis>
          <command>udevd</command>
          <arg><option>--daemon</option></arg>
          <arg><option>--debug-trace</option></arg>
          <arg><option>--debug</option></arg>
          <arg><option>--version</option></arg>
          <arg><option>--resolve-names=early|late|never</option></arg>
          <arg><option>--help</option></arg>
        </cmdsynopsis>
      </refsynopsisdiv>

      <refsect1><title>DESCRIPTION</title>
        <para>udevd listens to kernel uevents and passes the incoming events to
        udev. It ensures the correct event order and takes care, that events for child
        devices are delayed until the parent event has finished the device handling.
        The behavior of the running daemon can be changed with
        <command>udevadm control</command>.</para>
      </refsect1>

      <refsect1><title>OPTIONS</title>
        <variablelist>
          <varlistentry>
            <term><option>--daemon</option></term>
            <listitem>
              <para>Detach and run in the background.</para>
            </listitem>
          </varlistentry>
          <varlistentry>
            <term><option>--debug-trace</option></term>
            <listitem>
              <para>Run all events completely serialized. This may be useful if udev triggers
              actions or loads kernel modules which cause problems and a slow but continuous
              operation is needed, where no events are processed in parallel.
              </para>
            </listitem>
          </varlistentry>
          <varlistentry>
            <term><option>--debug</option></term>
            <listitem>
              <para>Print debug messages to stderr.</para>
            </listitem>
          </varlistentry>
          <varlistentry>
            <term><option>--resolve-names</option></term>
            <listitem>
              <para>Specify when udevd should resolve names of users and groups.
              When set to <option>early</option> (the default) names will be
              resolved when the rules are parsed.  When set to
              <option>late</option> names will be resolved for every event.
              When set to <option>never</option> names will never be resolved
              and all devices will be owned by root.</para>
            </listitem>
          </varlistentry>
          <varlistentry>
            <term><option>--version</option></term>
            <listitem>
              <para>Print version number.</para>
            </listitem>
          </varlistentry>
          <varlistentry>
            <term><option>--help</option></term>
            <listitem>
              <para>Print help text.</para>
            </listitem>
          </varlistentry>
        </variablelist>
      </refsect1>

      <refsect1><title>ENVIRONMENT</title>
        <variablelist>
          <varlistentry>
            <term><option>UDEV_LOG</option></term>
            <listitem>
              <para>Overrides the syslog priority specified in the config file.</para>
            </listitem>
          </varlistentry>
        </variablelist>
     </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>udevadm</refentrytitle><manvolnum>8</manvolnum>
        </citerefentry></para>
      </refsect1>
    </refentry>
  </section>
</article>