-<?xml version='1.0'?> <!--*-nxml-*-->
+<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<term><option>--list</option></term>
<listitem>
- <para>When used with the <command>tree</command> shows a
+ <para>When used with the <command>tree</command> command shows a
flat list of object paths instead of a tree.</para>
</listitem>
</varlistentry>
<term><option>--quiet</option></term>
<listitem>
- <para>When used with the <command>call</command> command suppresses
- display of the response message.</para>
+ <para>When used with the <command>call</command> command
+ suppresses display of the response message payload. Note that even
+ if this option is specified errors returned will still be
+ printed and the tool will indicate success or failure with
+ the process exit code.</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>
+
+ <varlistentry>
+ <term><option>--expect-reply=</option><replaceable>BOOL</replaceable></term>
+
+ <listitem>
+ <para>When used with the <command>call</command> command
+ specifies whether <command>busctl</command> shall wait for
+ completion of the method call, output the returned method
+ response data, and return success or failure via the process
+ exit code. If this is set to <literal>no</literal> the
+ method call will be issued but no response is expected, the
+ tool terminates immediately, and thus no response can be
+ shown, and no success or failure is returned via the exit
+ code. To only suppress output of the reply message payload
+ use <option>--quiet</option> above. Defaults to
+ <literal>yes</literal>.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--auto-start=</option><replaceable>BOOL</replaceable></term>
+
+ <listitem>
+ <para>When used with the <command>call</command> command specifies
+ whether the method call should implicitly activate the
+ called service should it not be running yet but is
+ configured to be auto-started. Defaults to
+ <literal>yes</literal>.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--allow-interactive-authorization=</option><replaceable>BOOL</replaceable></term>
+
+ <listitem>
+ <para>When used with the <command>call</command> command
+ specifies whether the services may enforce interactive
+ authorization while executing the operation, if the security
+ policy is configured for this. Defaults to
+ <literal>yes</literal>.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--timeout=</option><replaceable>SECS</replaceable></term>
+
+ <listitem>
+ <para>When used with the <command>call</command> command
+ specifies the maximum time to wait for method call
+ completion. If no time unit is specified assumes
+ seconds. The usual other units are understood, too (ms, us,
+ s, min, h, d, w, month, y). Note that this timeout does not
+ apply if <option>--expect-reply=no</option> is used as the
+ tool does not wait for any reply message then. When not
+ specified or when set to 0 the default of
+ <literal>25s</literal> is assumed.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--augment-creds=</option><replaceable>BOOL</replaceable></term>
+
+ <listitem>
+ <para>Controls whether credential data reported by
+ <command>list</command> or <command>status</command> shall
+ be augmented with data from
+ <filename>/proc</filename>. When this is turned on the data
+ shown is possibly inconsistent, as the data read from
+ <filename>/proc</filename> might be more recent than rest of
+ the credential information. Defaults to <literal>yes</literal>.</para>
</listitem>
</varlistentry>
</varlistentry>
<varlistentry>
- <term><command>tree</command> <arg choice="opt" rep="repeat"><replaceable>NAME</replaceable></arg></term>
+ <term><command>status</command> <arg choice="opt"><replaceable>SERVICE</replaceable></arg></term>
- <listitem><para>Shows an object tree of one or more
- services. If <replaceable>NAME</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>
+ <listitem><para>Show process information and credentials of a
+ bus service (if one is specified by its unique or well-known
+ name), a process (if one is specified by its numeric PID), or
+ the owner of the bus (if no parameter is
+ specified).</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
+ <replaceable>SERVICE</replaceable> is specified, show messages
to or from this endpoint. Otherwise, show all messages on the
- bus.</para></listitem>
+ bus. Use Ctrl-C to terminate dump.</para></listitem>
</varlistentry>
<varlistentry>
- <term><command>capture</command> <arg choice="opt" rep="repeat"><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
</varlistentry>
<varlistentry>
- <term><command>status</command> <arg choice="plain"><replaceable>NAME</replaceable></arg></term>
+ <term><command>tree</command> <arg choice="opt" rep="repeat"><replaceable>SERVICE</replaceable></arg></term>
- <listitem><para>Show process information and credentials of a
- bus service.</para></listitem>
+ <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>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>PARAMETERS</replaceable></arg></arg></term>
+ <term><command>introspect</command> <arg choice="plain"><replaceable>SERVICE</replaceable></arg> <arg choice="plain"><replaceable>OBJECT</replaceable></arg></term>
- <listitem><para>Invoke a method and show the response.</para></listitem>
+ <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>
~ianmdlvl / elogind.git / blobdiff