Systemd/man/busctl.xml

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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">

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<refentry id="busctl"
          xmlns:xi="http://www.w3.org/2001/XInclude">

  <refentryinfo>
    <title>busctl</title>
    <productname>systemd</productname>

    <authorgroup>
      <author>
        <contrib>A monkey with a typewriter</contrib>
        <firstname>Zbigniew</firstname>
        <surname>Jędrzejewski-Szmek</surname>
        <email>zbyszek@in.waw.pl</email>
      </author>
    </authorgroup>
  </refentryinfo>

  <refmeta>
    <refentrytitle>busctl</refentrytitle>
    <manvolnum>1</manvolnum>
  </refmeta>

  <refnamediv>
    <refname>busctl</refname>
    <refpurpose>Introspect the bus</refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <cmdsynopsis>
      <command>busctl</command>
      <arg choice="opt" rep="repeat">OPTIONS</arg>
      <arg choice="opt">COMMAND</arg>
      <arg choice="opt" rep="repeat"><replaceable>NAME</replaceable></arg>
    </cmdsynopsis>
  </refsynopsisdiv>

  <refsect1>
    <title>Description</title>

    <para><command>busctl</command> may be used to
    introspect and monitor the D-Bus bus.</para>
  </refsect1>

  <refsect1>
    <title>Options</title>

    <para>The following options are understood:</para>

    <variablelist>
      <varlistentry>
          <term><option>--address=<replaceable>ADDRESS</replaceable></option></term>

          <listitem><para>Connect to the bus specified by
          <replaceable>ADDRESS</replaceable> instead of using suitable
          defaults for either the system or user bus (see
          <option>--system</option> and <option>--user</option>
          options).</para></listitem>
      </varlistentry>

      <varlistentry>
          <term><option>--show-machine</option></term>

          <listitem><para>When showing the list of endpoints, show a
          column containing the names of containers they belong to.
          See
          <citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
          </para></listitem>
      </varlistentry>

      <varlistentry>
          <term><option>--unique</option></term>

          <listitem><para>When showing the list of endpoints, show
          only "unique" names (of the form
          <literal>:<replaceable>number</replaceable>.<replaceable>number</replaceable></literal>).
          </para></listitem>
      </varlistentry>

      <varlistentry>
          <term><option>--acquired</option></term>

          <listitem><para>The opposite of <option>--unique</option> —
          only "well-known" names will be shown.</para></listitem>
      </varlistentry>

      <varlistentry>
          <term><option>--activatable</option></term>

          <listitem><para>When showing the list of endpoints, show
          only endpoints which have actually not been activated yet,
          but may be started automatically if accessed.</para>
          </listitem>
      </varlistentry>

      <varlistentry>
          <term><option>--match=<replaceable>MATCH</replaceable></option></term>

          <listitem><para>When showing messages being exchanged, show only the
          subset matching <replaceable>MATCH</replaceable>.</para></listitem>
          <!-- TODO: link to sd_bus_add_match when it is written? -->
      </varlistentry>

      <varlistentry>
        <term><option>--no-legend</option></term>

        <listitem>
          <para>Do not print the legend,
          i.e. the column headers and the
          footer.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><option>--size=</option></term>

        <listitem>
          <para>When used with the <command>capture</command> command
          specifies the maximum bus message size to capture
          ("snaplen"). Defaults to 4096 bytes.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><option>--list</option></term>

        <listitem>
          <para>When used with the <command>tree</command> command shows a
          flat list of object paths instead of a tree.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><option>--quiet</option></term>

        <listitem>
          <para>When used with the <command>call</command> command suppresses
          display of the response message.</para>
        </listitem>
      </varlistentry>

      <xi:include href="user-system-options.xml" xpointer="user" />
      <xi:include href="user-system-options.xml" xpointer="system" />
      <xi:include href="user-system-options.xml" xpointer="host" />
      <xi:include href="user-system-options.xml" xpointer="machine" />

      <xi:include href="standard-options.xml" xpointer="help" />
      <xi:include href="standard-options.xml" xpointer="version" />
      <xi:include href="standard-options.xml" xpointer="no-pager" />
    </variablelist>
  </refsect1>

  <refsect1>
    <title>Commands</title>

    <para>The following commands are understood:</para>

    <variablelist>
      <varlistentry>
        <term><command>list</command></term>

        <listitem><para>Show service names on the bus. This is the
        default if no command is specified.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term><command>status</command> <arg choice="plain"><replaceable>SERVICE</replaceable></arg></term>

        <listitem><para>Show process information and credentials of a
        bus service.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term><command>monitor</command> <arg choice="opt" rep="repeat"><replaceable>SERVICE</replaceable></arg></term>

        <listitem><para>Dump messages being exchanged. If
        <replaceable>SERVICE</replaceable> is specified, show messages
        to or from this endpoint. Otherwise, show all messages on the
        bus. Use Ctrl-C to terminate dump.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term><command>capture</command> <arg choice="opt" rep="repeat"><replaceable>SERVICE</replaceable></arg></term>

        <listitem><para>Similar to <command>monitor</command> but
        writes the output in pcap format (for details see the <ulink
        url="http://wiki.wireshark.org/Development/LibpcapFileFormat">Libpcap
        File Format</ulink> description. Make sure to redirect the
        output to STDOUT to a file. Tools like
        <citerefentry><refentrytitle>wireshark</refentrytitle><manvolnum>1</manvolnum></citerefentry>
        may be used to dissect and view the generated
        files.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term><command>tree</command> <arg choice="opt" rep="repeat"><replaceable>SERVICE</replaceable></arg></term>

        <listitem><para>Shows an object tree of one or more
        services. If <replaceable>SERVICE</replaceable> is specified,
        show object tree of the specified services only. Otherwise,
        show all object trees of all services on the bus that acquired
        at least one well-known name.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term><command>introspect</command> <arg choice="plain"><replaceable>SERVICE</replaceable></arg> <arg choice="plain"><replaceable>OBJECT</replaceable></arg></term>

        <listitem><para>Show interfaces, methods, properties and
        signals of the specified object (identified by its path) on
        the specified service.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term><command>call</command> <arg choice="plain"><replaceable>SERVICE</replaceable></arg> <arg choice="plain"><replaceable>OBJECT</replaceable></arg> <arg choice="plain"><replaceable>INTERFACE</replaceable></arg> <arg choice="plain"><replaceable>METHOD</replaceable></arg> <arg choice="opt"><replaceable>SIGNATURE</replaceable> <arg choice="opt" rep="repeat"><replaceable>ARGUMENT</replaceable></arg></arg></term>

        <listitem><para>Invoke a method and show the response. Takes a
        service name, object path, interface name and method name. If
        parameters shall be passed to the method call a signature
        string is required, followed by the individual arguments,
        individually formatted as textual parameters.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term><command>get-property</command> <arg choice="plain"><replaceable>SERVICE</replaceable></arg> <arg choice="plain"><replaceable>OBJECT</replaceable></arg> <arg choice="opt"><replaceable>INTERFACE</replaceable> <arg choice="opt" rep="repeat"><replaceable>PROPERTY</replaceable></arg></arg></term>

        <listitem><para>Retrieve the current value one or more object
        properties. Takes a service name and object path. Optionally
        takes an interface name and property name. If the property
        name is omited, shows all properties on the selected
        interface. If the interface is also omitted shows the
        properties of all interfaces. Multiple properties may be
        specified at once in which case their values will be shown one
        after the other.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term><command>help</command></term>

        <listitem><para>Show command syntax help.</para></listitem>
      </varlistentry>
    </variablelist>
  </refsect1>

  <refsect1>
    <title>See Also</title>

    <para>
      <citerefentry><refentrytitle>dbus-daemon</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
      <ulink url="http://freedesktop.org/wiki/Software/dbus">D-Bus</ulink>,
      <ulink url="https://code.google.com/p/d-bus/">kdbus</ulink>,
      <citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>systemd-bus-proxyd</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>machinectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>wireshark</refentrytitle><manvolnum>1</manvolnum></citerefentry>
    </para>
  </refsect1>
</refentry>