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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_set_exit_on_disconnect"
xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>sd_bus_set_exit_on_disconnect</title>
<productname>systemd</productname>
</refentryinfo>
<refmeta>
<refentrytitle>sd_bus_set_exit_on_disconnect</refentrytitle>
<manvolnum>3</manvolnum>
</refmeta>
<refnamediv>
<refname>sd_bus_set_exit_on_disconnect</refname>
<refname>sd_bus_get_exit_on_disconnect</refname>
<refpurpose>Control the exit behavior when the bus object disconnects</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
<funcprototype>
<funcdef>int <function>sd_bus_set_exit_on_disconnect</function></funcdef>
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
<paramdef>int <parameter>b</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>int <function>sd_bus_get_exit_on_disconnect</function></funcdef>
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><function>sd_bus_set_exit_on_disconnect()</function> may be used to configure the exit
behavior when the given bus object disconnects. If <parameter>b</parameter> is zero, no special
logic is executed when the bus object disconnects. If <parameter>b</parameter> is non-zero, the
behavior on disconnect depends on whether the bus object is attached to an event loop or not. If
the bus object is attached to an event loop (see
<citerefentry><refentrytitle>sd_bus_attach_event</refentrytitle><manvolnum>3</manvolnum></citerefentry>),
the event loop is closed when the bus object disconnects (as if calling
<citerefentry><refentrytitle>sd_event_exit</refentrytitle><manvolnum>3</manvolnum></citerefentry>).
Otherwise,
<citerefentry project='man-pages'><refentrytitle>exit</refentrytitle><manvolnum>3</manvolnum></citerefentry>
is called. The exit code passed to <function>sd_event_exit()</function> and
<function>exit()</function> is <constant>EXIT_FAILURE</constant>. If the bus object has already
disconnected when enabling the exit behavior, the exit behavior is executed immediately. By
default, the exit behavior is disabled.</para>
<para><function>sd_bus_get_exit_on_disconnect()</function> returns whether the exit on
disconnect behavior is enabled for the given bus object.</para>
</refsect1>
<refsect1>
<title>Return Value</title>
<para>On success, <function>sd_bus_set_exit_on_disconnect()</function> returns a non-negative
integer. On failure, it returns a negative errno-style error code.</para>
<para><function>sd_bus_get_exit_on_disconnect()</function> returns a positive integer if the
exit on disconnect behavior is enabled. Otherwise, it returns zero.</para>
<refsect2>
<title>Errors</title>
<para>Returned errors may indicate the following problems:</para>
<variablelist>
<varlistentry>
<term><constant>-EINVAL</constant></term>
<listitem><para>A required parameter was <constant>NULL</constant>.</para></listitem>
</varlistentry>
<varlistentry>
<term><constant>-ENOPKG</constant></term>
<listitem><para>The bus object could not be resolved.</para></listitem>
</varlistentry>
<varlistentry>
<term><constant>-ECHILD</constant></term>
<listitem><para>The bus connection was created in a different process, library or module instance.</para></listitem>
</varlistentry>
</variablelist>
</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_attach_event</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd-event</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_event_exit</refentrytitle><manvolnum>3</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
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