1<?xml version='1.0'?>
2<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3  "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
4<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
5
6<refentry id="sd_bus_slot_get_bus" xmlns:xi="http://www.w3.org/2001/XInclude">
7  <refentryinfo>
8    <title>sd_bus_slot_get_bus</title>
9    <productname>systemd</productname>
10  </refentryinfo>
11
12  <refmeta>
13    <refentrytitle>sd_bus_slot_get_bus</refentrytitle>
14    <manvolnum>3</manvolnum>
15  </refmeta>
16
17  <refnamediv>
18    <refname>sd_bus_slot_get_bus</refname>
19    <refname>sd_bus_slot_get_current_handler</refname>
20    <refname>sd_bus_slot_get_current_message</refname>
21    <refname>sd_bus_slot_get_current_userdata</refname>
22
23    <refpurpose>Query information attached to a bus slot object</refpurpose>
24  </refnamediv>
25
26  <refsynopsisdiv>
27    <funcsynopsis>
28      <funcsynopsisinfo>#include &lt;systemd/sd-bus.h&gt;</funcsynopsisinfo>
29
30      <xi:include href="sd_bus_add_match.xml" xpointer="sd_bus_message_handler_t"/>
31
32      <funcprototype>
33        <funcdef>sd_bus *<function>sd_bus_slot_get_bus</function></funcdef>
34        <paramdef>sd_bus_slot *<parameter>slot</parameter></paramdef>
35      </funcprototype>
36
37      <funcprototype>
38        <funcdef>sd_bus_message_handler_t <function>sd_bus_slot_get_current_handler</function>
39        </funcdef>
40        <paramdef>sd_bus_slot *<parameter>slot</parameter></paramdef>
41      </funcprototype>
42
43      <funcprototype>
44        <funcdef>sd_bus_message *<function>sd_bus_slot_get_current_message</function></funcdef>
45        <paramdef>sd_bus_slot *<parameter>slot</parameter></paramdef>
46      </funcprototype>
47
48      <funcprototype>
49        <funcdef>void *<function>sd_bus_slot_get_current_userdata</function></funcdef>
50        <paramdef>sd_bus_slot *<parameter>slot</parameter></paramdef>
51      </funcprototype>
52    </funcsynopsis>
53  </refsynopsisdiv>
54
55  <refsect1>
56    <title>Description</title>
57
58    <para><function>sd_bus_slot_get_bus()</function> returns the bus object that message
59    <parameter>slot</parameter> is attached to.</para>
60
61    <para><function>sd_bus_slot_get_current_handler()</function>,
62    <function>sd_bus_slot_get_current_message()</function> and
63    <function>sd_bus_slot_get_current_userdata()</function> return the current handler, message and
64    userdata respectively of the bus <parameter>slot</parameter> is attached to if we're currently
65    executing the callback associated with <parameter>slot</parameter>.</para>
66  </refsect1>
67
68  <refsect1>
69    <title>Return Value</title>
70
71    <para><function>sd_bus_slot_get_bus()</function> always returns the bus object.</para>
72
73    <para>On success, <function>sd_bus_slot_get_current_handler()</function>,
74    <function>sd_bus_slot_get_current_message()</function> and
75    <function>sd_bus_slot_get_current_userdata()</function> return the requested object. On failure,
76    they return <constant>NULL</constant>.</para>
77  </refsect1>
78
79  <xi:include href="libsystemd-pkgconfig.xml" />
80
81  <refsect1>
82    <title>See Also</title>
83
84    <para>
85      <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
86      <citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
87    </para>
88  </refsect1>
89
90</refentry>
91