mirror of
https://github.com/systemd/systemd.git
synced 2024-10-31 07:51:21 +03:00
177 lines
8.4 KiB
XML
177 lines
8.4 KiB
XML
<?xml version='1.0'?>
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
|
|
|
|
<refentry id="sd_bus_set_property"
|
|
xmlns:xi="http://www.w3.org/2001/XInclude">
|
|
|
|
<refentryinfo>
|
|
<title>sd_bus_set_property</title>
|
|
<productname>systemd</productname>
|
|
</refentryinfo>
|
|
|
|
<refmeta>
|
|
<refentrytitle>sd_bus_set_property</refentrytitle>
|
|
<manvolnum>3</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>sd_bus_set_property</refname>
|
|
<refname>sd_bus_set_propertyv</refname>
|
|
<refname>sd_bus_get_property</refname>
|
|
<refname>sd_bus_get_property_trivial</refname>
|
|
<refname>sd_bus_get_property_string</refname>
|
|
<refname>sd_bus_get_property_strv</refname>
|
|
|
|
<refpurpose>Set or query D-Bus service properties</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<funcsynopsis>
|
|
<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_bus_set_property</function></funcdef>
|
|
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
|
|
<paramdef>const char *<parameter>destination</parameter></paramdef>
|
|
<paramdef>const char *<parameter>path</parameter></paramdef>
|
|
<paramdef>const char *<parameter>interface</parameter></paramdef>
|
|
<paramdef>const char *<parameter>member</parameter></paramdef>
|
|
<paramdef>sd_bus_error *<parameter>ret_error</parameter></paramdef>
|
|
<paramdef>sd_bus_message **<parameter>reply</parameter></paramdef>
|
|
<paramdef>const char *<parameter>type</parameter></paramdef>
|
|
<paramdef>...</paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_bus_set_propertyv</function></funcdef>
|
|
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
|
|
<paramdef>const char *<parameter>destination</parameter></paramdef>
|
|
<paramdef>const char *<parameter>path</parameter></paramdef>
|
|
<paramdef>const char *<parameter>interface</parameter></paramdef>
|
|
<paramdef>const char *<parameter>member</parameter></paramdef>
|
|
<paramdef>sd_bus_error *<parameter>ret_error</parameter></paramdef>
|
|
<paramdef>sd_bus_message **<parameter>reply</parameter></paramdef>
|
|
<paramdef>const char *<parameter>type</parameter></paramdef>
|
|
<paramdef>va_list <parameter>ap</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_bus_get_property</function></funcdef>
|
|
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
|
|
<paramdef>const char *<parameter>destination</parameter></paramdef>
|
|
<paramdef>const char *<parameter>path</parameter></paramdef>
|
|
<paramdef>const char *<parameter>interface</parameter></paramdef>
|
|
<paramdef>const char *<parameter>member</parameter></paramdef>
|
|
<paramdef>sd_bus_error *<parameter>ret_error</parameter></paramdef>
|
|
<paramdef>sd_bus_message **<parameter>reply</parameter></paramdef>
|
|
<paramdef>const char *<parameter>type</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_bus_get_property_trivial</function></funcdef>
|
|
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
|
|
<paramdef>const char *<parameter>destination</parameter></paramdef>
|
|
<paramdef>const char *<parameter>path</parameter></paramdef>
|
|
<paramdef>const char *<parameter>interface</parameter></paramdef>
|
|
<paramdef>const char *<parameter>member</parameter></paramdef>
|
|
<paramdef>sd_bus_error *<parameter>ret_error</parameter></paramdef>
|
|
<paramdef>char <parameter>type</parameter></paramdef>
|
|
<paramdef>void *<parameter>ret_ptr</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_bus_get_property_string</function></funcdef>
|
|
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
|
|
<paramdef>const char *<parameter>destination</parameter></paramdef>
|
|
<paramdef>const char *<parameter>path</parameter></paramdef>
|
|
<paramdef>const char *<parameter>interface</parameter></paramdef>
|
|
<paramdef>const char *<parameter>member</parameter></paramdef>
|
|
<paramdef>sd_bus_error *<parameter>ret_error</parameter></paramdef>
|
|
<paramdef>char **<parameter>ret</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_bus_get_property_strv</function></funcdef>
|
|
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
|
|
<paramdef>const char *<parameter>destination</parameter></paramdef>
|
|
<paramdef>const char *<parameter>path</parameter></paramdef>
|
|
<paramdef>const char *<parameter>interface</parameter></paramdef>
|
|
<paramdef>const char *<parameter>member</parameter></paramdef>
|
|
<paramdef>sd_bus_error *<parameter>ret_error</parameter></paramdef>
|
|
<paramdef>char ***<parameter>ret</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para>These functions set or query D-Bus properties. D-Bus properties are service fields exposed
|
|
via the <constant>org.freedesktop.DBus.Properties</constant> interface. Under the hood, these
|
|
functions call methods of the <constant>org.freedesktop.DBus.Properties</constant> interface and
|
|
as a result their semantics are similar to
|
|
<citerefentry><refentrytitle>sd_bus_call_method</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
|
|
</para>
|
|
|
|
<para><function>sd_bus_set_property()</function> sets a D-Bus property. On success, the response
|
|
is stored in <parameter>reply</parameter>. If setting the property fails or an internal error
|
|
occurs, an error is returned and an extended description of the error is optionally stored in
|
|
<parameter>ret_error</parameter> if it is not <constant>NULL</constant>.
|
|
<parameter>type</parameter> and the arguments that follow it describe the new value of the
|
|
property and must follow the format described in
|
|
<citerefentry><refentrytitle>sd_bus_message_append</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
|
|
</para>
|
|
|
|
<para><function>sd_bus_set_propertyv()</function> is equivalent to
|
|
<function>sd_bus_set_property()</function>, except that it is called with a
|
|
<literal>va_list</literal> instead of a variable number of arguments.</para>
|
|
|
|
<para><function>sd_bus_get_property()</function> queries a D-Bus property. If retrieving the
|
|
property fails or an internal error occurs, an error is returned and an extended description of
|
|
the error is optionally stored in <parameter>ret_error</parameter> if it is not
|
|
<constant>NULL</constant>. On success, the property is stored in <parameter>reply</parameter>.
|
|
<parameter>type</parameter> describes the property type and must follow the format described in
|
|
<citerefentry><refentrytitle>sd_bus_message_append</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
|
|
</para>
|
|
|
|
<para><function>sd_bus_get_property_trivial()</function>,
|
|
<function>sd_bus_get_property_string()</function> and
|
|
<function>sd_bus_get_property_strv()</function> are shorthands for
|
|
<function>sd_bus_get_property()</function> that are used to query basic, string and string
|
|
vector properties respectively. The caller is responsible for freeing the string and string
|
|
vector results stored in <parameter>ret</parameter> by
|
|
<function>sd_bus_get_property_string()</function> and
|
|
<function>sd_bus_get_property_strv()</function>.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Return Value</title>
|
|
|
|
<para>On success, these functions return a non-negative integer. On failure, they return a
|
|
negative errno-style error code.</para>
|
|
|
|
<refsect2 id='errors'>
|
|
<title>Errors</title>
|
|
|
|
<para>See the
|
|
<citerefentry><refentrytitle>sd_bus_call_method</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
man page for a list of possible errors.</para>
|
|
</refsect2>
|
|
</refsect1>
|
|
|
|
<xi:include href="libsystemd-pkgconfig.xml" />
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>sd_bus_call_method</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|