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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">
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<!-- SPDX - License - Identifier: LGPL - 2.1 - or - later -->
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<refentry id= "sd_bus_slot_get_bus" xmlns:xi= "http://www.w3.org/2001/XInclude" >
<refentryinfo >
<title > sd_bus_slot_get_bus</title>
<productname > systemd</productname>
</refentryinfo>
<refmeta >
<refentrytitle > sd_bus_slot_get_bus</refentrytitle>
<manvolnum > 3</manvolnum>
</refmeta>
<refnamediv >
<refname > sd_bus_slot_get_bus</refname>
<refname > sd_bus_slot_get_current_handler</refname>
<refname > sd_bus_slot_get_current_message</refname>
<refname > sd_bus_slot_get_current_userdata</refname>
<refpurpose > Query information attached to a bus slot object</refpurpose>
</refnamediv>
<refsynopsisdiv >
<funcsynopsis >
<funcsynopsisinfo > #include < systemd/sd-bus.h> </funcsynopsisinfo>
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<xi:include href= "sd_bus_add_match.xml" xpointer= "sd_bus_message_handler_t" />
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<funcprototype >
<funcdef > sd_bus *<function > sd_bus_slot_get_bus</function> </funcdef>
<paramdef > sd_bus_slot *<parameter > slot</parameter> </paramdef>
</funcprototype>
<funcprototype >
<funcdef > sd_bus_message_handler_t <function > sd_bus_slot_get_current_handler</function>
</funcdef>
<paramdef > sd_bus_slot *<parameter > slot</parameter> </paramdef>
</funcprototype>
<funcprototype >
<funcdef > sd_bus_message *<function > sd_bus_slot_get_current_message</function> </funcdef>
<paramdef > sd_bus_slot *<parameter > slot</parameter> </paramdef>
</funcprototype>
<funcprototype >
<funcdef > void *<function > sd_bus_slot_get_current_userdata</function> </funcdef>
<paramdef > sd_bus_slot *<parameter > slot</parameter> </paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 >
<title > Description</title>
<para > <function > sd_bus_slot_get_bus()</function> returns the bus object that message
<parameter > slot</parameter> is attached to.</para>
<para > <function > sd_bus_slot_get_current_handler()</function> ,
<function > sd_bus_slot_get_current_message()</function> and
<function > sd_bus_slot_get_current_userdata()</function> return the current handler, message and
userdata respectively of the bus <parameter > slot</parameter> is attached to if we're currently
executing the callback associated with <parameter > slot</parameter> .</para>
</refsect1>
<refsect1 >
<title > Return Value</title>
<para > <function > sd_bus_slot_get_bus()</function> always returns the bus object.</para>
<para > On success, <function > sd_bus_slot_get_current_handler()</function> ,
<function > sd_bus_slot_get_current_message()</function> and
<function > sd_bus_slot_get_current_userdata()</function> return the requested object. On failure,
they return <constant > NULL</constant> .</para>
</refsect1>
<xi:include href= "libsystemd-pkgconfig.xml" />
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<refsect1 >
<title > History</title>
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<para > <function > sd_bus_slot_get_bus()</function> ,
<function > sd_bus_slot_get_current_handler()</function> ,
<function > sd_bus_slot_get_current_message()</function> , and
<function > sd_bus_slot_get_current_userdata()</function> were added in version 246.</para>
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</refsect1>
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<refsect1 >
<title > See Also</title>
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<para > <simplelist type= "inline" >
<member > <citerefentry > <refentrytitle > systemd</refentrytitle> <manvolnum > 1</manvolnum> </citerefentry> </member>
<member > <citerefentry > <refentrytitle > sd-bus</refentrytitle> <manvolnum > 3</manvolnum> </citerefentry> </member>
</simplelist> </para>
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</refsect1>
</refentry>