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+<?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_get_current_handler" xmlns:xi="http://www.w3.org/2001/XInclude">
+
+ <refentryinfo>
+ <title>sd_bus_get_current_handler</title>
+ <productname>systemd</productname>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>sd_bus_get_current_handler</refentrytitle>
+ <manvolnum>3</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>sd_bus_get_current_handler</refname>
+ <refname>sd_bus_get_current_message</refname>
+ <refname>sd_bus_get_current_slot</refname>
+ <refname>sd_bus_get_current_userdata</refname>
+
+ <refpurpose>Query information of the callback a bus object is currently running</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include &lt;systemd/sd-bus.h&gt;</funcsynopsisinfo>
+
+ <xi:include href="sd_bus_add_match.xml" xpointer="sd_bus_message_handler_t"/>
+
+ <funcprototype>
+ <funcdef>sd_bus_message_handler_t <function>sd_bus_get_current_handler</function></funcdef>
+ <paramdef>sd_bus *<parameter>bus</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>sd_bus_message* <function>sd_bus_get_current_message</function></funcdef>
+ <paramdef>sd_bus *<parameter>bus</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>sd_bus_slot* <function>sd_bus_get_current_slot</function></funcdef>
+ <paramdef>sd_bus *<parameter>bus</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>void* <function>sd_bus_get_current_userdata</function></funcdef>
+ <paramdef>sd_bus *<parameter>bus</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>Whenever sd-bus is about to invoke a user-supplied callback function, it stores the
+ current callback, D-Bus message, slot and userdata pointer and allows these to be queried via
+ <function>sd_bus_get_current_handler()</function>,
+ <function>sd_bus_get_current_message()</function>,
+ <function>sd_bus_get_current_slot()</function> and
+ <function>sd_bus_get_current_userdata()</function>, respectively. If <parameter>bus</parameter>
+ cannot be resolved or if execution does not reside in a user-supplied callback of
+ <parameter>bus</parameter>, these functions return <constant>NULL</constant>.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Return Value</title>
+
+ <para>On success, these functions return the requested object. On failure, they return
+ <constant>NULL</constant>.</para>
+ </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>
+ </para>
+ </refsect1>
+
+</refentry>