along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
-<refentry id="busctl">
+<refentry id="busctl"
+ xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>busctl</title>
<para>The following options are understood:</para>
<variablelist>
- <varlistentry>
- <term><option>-h</option></term>
- <term><option>--help</option></term>
-
- <listitem><para>Print a short help text and exit.
- </para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><option>--version</option></term>
-
- <listitem>
- <para>Print a short version string and exit.</para>
- </listitem>
- </varlistentry>
-
- <varlistentry>
- <term><option>--no-pager</option></term>
-
- <listitem>
- <para>Do not pipe output into a pager.</para>
- </listitem>
- </varlistentry>
-
- <varlistentry>
- <term><option>--system</option></term>
-
- <listitem>
- <para>Talk to the systemd system manager (the
- default).</para>
- </listitem>
- </varlistentry>
-
- <varlistentry>
- <term><option>--user</option></term>
-
- <listitem>
- <para>Talk to the systemd manager of the calling
- user.</para>
- </listitem>
- </varlistentry>
-
- <varlistentry>
- <term><option>-H</option></term>
- <term><option>--host</option></term>
-
- <listitem>
- <para>Execute the operation remotely. Specify a hostname, or
- username and hostname separated by <literal>@</literal>, to
- connect to. This will use SSH to talk to the remote systemd
- instance.</para>
- </listitem>
- </varlistentry>
-
- <varlistentry>
- <term><option>-M</option></term>
- <term><option>--machine=</option></term>
-
- <listitem><para>Execute the operation on a local container.
- Specify a container name to connect to.</para></listitem>
- </varlistentry>
-
<varlistentry>
<term><option>--address=<replaceable>ADDRESS</replaceable></option></term>
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>
+
+
+ <varlistentry>
+ <term><option>--verbose</option></term>
+
+ <listitem>
+ <para>When used with the <command>call</command> or
+ <command>get-property</command> command shows output in a
+ more verbose format.</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>
<varlistentry>
<term><command>list</command></term>
- <listitem><para>Show endpoints attached to the bus. This is
- the default if no command is specified.</para></listitem>
+ <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>NAME</replaceable></arg></term>
+ <term><command>monitor</command> <arg choice="opt" rep="repeat"><replaceable>SERVICE</replaceable></arg></term>
<listitem><para>Dump messages being exchanged. If
- <replaceable>NAME</replaceable> is specified, show messages
- to or from this endpoint. Otherwsise, show all messages on the
- bus.</para></listitem>
+ <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>status</command> <arg choice="plain"><replaceable>NAME</replaceable></arg></term>
+ <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>
- <listitem><para>Show process information and credentials of a
- bus endpoint.</para></listitem>
+ <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 arguments, individually
+ formatted as strings. For details on the formatting used, see
+ below. To suppress output of the returned data use the
+ <option>--quiet</option> option.</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="plain"><replaceable>INTERFACE</replaceable></arg> <arg choice="plain" rep="repeat"><replaceable>PROPERTY</replaceable></arg></term>
+
+ <listitem><para>Retrieve the current value of one or more
+ object properties. Takes a service name, object path,
+ interface name and property name. Multiple properties may be
+ specified at once in which case their values will be shown one
+ after the other, separated by newlines. The output is by
+ default in terse format. Use <option>--verbose</option> for a
+ more elaborate output format.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><command>set-property</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>PROPERTY</replaceable></arg> <arg choice="plain"><replaceable>SIGNATURE</replaceable></arg> <arg choice="plain" rep="repeat"><replaceable>ARGUMENT</replaceable></arg></term>
+
+ <listitem><para>Set the current value an object
+ property. Takes a service name, object path, interface name,
+ property name, property signature, followed by a list of
+ parameters formatted as strings.</para></listitem>
</varlistentry>
<varlistentry>
</variablelist>
</refsect1>
+ <refsect1>
+ <title>Parameter Formatting</title>
+
+ <para>The <command>call</command> and
+ <command>set-property</command> commands take a signature
+ string followed by a list of parameters formatted as string
+ (for details on D-Bus signature strings see the <ulink
+ url="http://dbus.freedesktop.org/doc/dbus-specification.html#type-system">Type
+ system chapter of the D-Bus specification</ulink>). For
+ simple types each parameter following the signature should
+ simply be the parameter's value formatted as
+ string. Positive boolean values may be formatted as
+ <literal>true</literal>, <literal>yes</literal>,
+ <literal>on</literal>, <literal>1</literal>; negative
+ boolean values may be specified as <literal>false</literal>,
+ <literal>no</literal>, <literal>off</literal>,
+ <literal>0</literal>. For arrays, a numeric argument for the
+ number of entries followed by the entries shall be
+ specified. For variants the signature of the contents shall
+ be specified, followed by the contents. For dictionaries and
+ structs the contents of them shall be directly
+ specified.</para>
+
+ <para>For example,
+ <programlisting>s jawoll</programlisting> is the formatting
+ of a single string <literal>jawoll</literal>.</para>
+
+ <para>
+ <programlisting>as 3 hello world foobar</programlisting>
+ is the formatting of a string array with three entries,
+ <literal>hello</literal>, <literal>world</literal> and
+ <literal>foobar</literal>.</para>
+
+ <para>
+ <programlisting>a{sv} 3 One s Eins Two u 2 Yes b true</programlisting>
+ is the formatting of a dictionary
+ array that maps strings to variants, consisting of three
+ entries. The string <literal>One</literal> is assigned the
+ string <literal>Eins</literal>. The string
+ <literal>Two</literal> is assigned the 32bit unsigned
+ integer 2. The string <literal>Yes</literal> is assigned a
+ positive boolean.</para>
+
+ <para>Note that the <command>call</command>,
+ <command>get-property</command>,
+ <command>introspect</command> commands will also generate
+ output in this format for the returned data. Since this
+ format is sometimes too terse to be easily understood, the
+ <command>call</command> and <command>get-property</command>
+ commands may generate a more verbose, multi-line output when
+ passed the <option>--verbose</option> option.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Examples</title>
+
+ <example>
+ <title>Write and Read a Property</title>
+
+ <para>The following two commands first write a
+ property and then read it back. The property is
+ found on the
+ <literal>/org/freedesktop/systemd1</literal> object
+ of the <literal>org.freedesktop.systemd1</literal>
+ service. The name of the property is
+ <literal>LogLevel</literal> on the
+ <literal>org.freedesktop.systemd1.Manager</literal>
+ interface. The property contains a single
+ string:</para>
+
+ <programlisting># busctl set-property org.freedesktop.systemd1 /org/freedesktop/systemd1 org.freedesktop.systemd1.Manager LogLevel s debug
+# busctl get-property org.freedesktop.systemd1 /org/freedesktop/systemd1 org.freedesktop.systemd1.Manager LogLevel
+s "debug"</programlisting>
+
+ </example>
+
+ <example>
+ <title>Terse and Verbose Output</title>
+
+ <para>The following two commands read a property that
+ contains an array of strings, and first show it in
+ terse format, followed by verbose format:</para>
+
+ <programlisting>$ busctl get-property org.freedesktop.systemd1 /org/freedesktop/systemd1 org.freedesktop.systemd1.Manager Environment
+as 2 "LANG=en_US.UTF-8" "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin"
+$ busctl get-property --verbose org.freedesktop.systemd1 /org/freedesktop/systemd1 org.freedesktop.systemd1.Manager Environment
+ARRAY "s" {
+ STRING "LANG=en_US.UTF-8";
+ STRING "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin";
+};</programlisting>
+ </example>
+
+ <example>
+ <title>Invoking a Method</title>
+
+ <para>The following command invokes a the
+ <literal>StartUnit</literal> method on the
+ <literal>org.freedesktop.systemd1.Manager</literal>
+ interface of the
+ <literal>/org/freedesktop/systemd1</literal> object
+ of the <literal>org.freedesktop.systemd1</literal>
+ service, and passes it two strings
+ <literal>cups.service</literal> and
+ <literal>replace</literal>. As result of the method
+ call a single object path parameter is received and
+ shown:</para>
+
+ <programlisting># busctl call org.freedesktop.systemd1 /org/freedesktop/systemd1 org.freedesktop.systemd1.Manager StartUnit ss "cups.service" "replace"
+o "/org/freedesktop/systemd1/job/42684"</programlisting>
+ </example>
+ </refsect1>
+
<refsect1>
<title>See Also</title>
<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>machinectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>wireshark</refentrytitle><manvolnum>1</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
~ianmdlvl / elogind.git / blobdiff