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-<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-
-<!--
- This file is part of systemd.
-
- Copyright 2015 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
--->
-
-<refentry id="sd_event_exit" xmlns:xi="http://www.w3.org/2001/XInclude">
-
- <refentryinfo>
- <title>sd_event_exit</title>
- <productname>systemd</productname>
-
- <authorgroup>
- <author>
- <contrib>Developer</contrib>
- <firstname>Lennart</firstname>
- <surname>Poettering</surname>
- <email>lennart@poettering.net</email>
- </author>
- </authorgroup>
- </refentryinfo>
-
- <refmeta>
- <refentrytitle>sd_event_exit</refentrytitle>
- <manvolnum>3</manvolnum>
- </refmeta>
-
- <refnamediv>
- <refname>sd_event_exit</refname>
- <refname>sd_event_get_exit_code</refname>
-
- <refpurpose>Ask the event loop to exit</refpurpose>
- </refnamediv>
-
- <refsynopsisdiv>
- <funcsynopsis>
- <funcsynopsisinfo>#include &lt;systemd/sd-event.h&gt;</funcsynopsisinfo>
-
- <funcprototype>
- <funcdef>int <function>sd_event_exit</function></funcdef>
- <paramdef>sd_event *<parameter>event</parameter></paramdef>
- <paramdef>int <parameter>code</parameter></paramdef>
- </funcprototype>
-
- <funcprototype>
- <funcdef>int <function>sd_event_get_exit_code</function></funcdef>
- <paramdef>sd_event *<parameter>event</parameter></paramdef>
- <paramdef>int *<parameter>code</parameter></paramdef>
- </funcprototype>
-
- </funcsynopsis>
- </refsynopsisdiv>
-
- <refsect1>
- <title>Description</title>
-
- <para><function>sd_event_exit()</function> requests the event loop
- specified in the <parameter>event</parameter> event loop object to
- exit. The <parameter>code</parameter> parameter may be any integer
- value and is returned as-is by
- <citerefentry><refentrytitle>sd_event_loop</refentrytitle><manvolnum>3</manvolnum></citerefentry>
- after the last event loop iteration. It may also be queried
- using <function>sd_event_get_exit_code()</function>, see
- below. </para>
-
- <para>When exiting is requested the event loop will stop listening
- for and dispatching regular event sources. Instead it will proceed
- with executing only event sources registered with
- <citerefentry><refentrytitle>sd_event_add_exit</refentrytitle><manvolnum>3</manvolnum></citerefentry>
- in the order defined by their priority. After all exit event
- sources have been dispatched the event loop is terminated.</para>
-
- <para>If <function>sd_event_exit()</function> is invoked a second
- time while the event loop is still processing exit event sources,
- the exit code stored in the event loop object is updated, but
- otherwise no further operation is executed.</para>
-
- <para><function>sd_event_get_exit_code()</function> may be used to
- query the exit code passed into
- <function>sd_event_exit()</function> earlier.</para>
-
- <para>While the full positive and negative integer ranges may be used
- for the exit code, care should be taken not pick exit codes that
- conflict with regular exit codes returned by
- <function>sd_event_loop()</function>, if these exit codes shall be
- distinguishable.</para>
- </refsect1>
-
- <refsect1>
- <title>Return Value</title>
-
- <para>On success, <function>sd_event_exit()</function> and
- <function>sd_event_get_exit_code()</function> return 0 or a positive
- integer. On failure, they return a negative errno-style error
- code.</para>
- </refsect1>
-
- <refsect1>
- <title>Errors</title>
-
- <para>Returned errors may indicate the following problems:</para>
-
- <variablelist>
-
- <varlistentry>
- <term><constant>-EINVAL</constant></term>
-
- <listitem><para>The event loop object or error code pointer are invalid.</para></listitem>
-
- </varlistentry>
-
- <varlistentry>
- <term><constant>-ECHILD</constant></term>
-
- <listitem><para>The event loop was created in a different process.</para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><constant>-ESTALE</constant></term>
-
- <listitem><para>The event loop has exited already and all exit handlers are already processed.</para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term><constant>-ENODATA</constant></term>
-
- <listitem><para>The event loop has not been requested to exit yet.</para></listitem>
- </varlistentry>
-
- </variablelist>
- </refsect1>
-
- <xi:include href="libsystemd-pkgconfig.xml" />
-
- <refsect1>
- <title>See Also</title>
-
- <para>
- <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd-event</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd_event_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd_event_add_exit</refentrytitle><manvolnum>3</manvolnum></citerefentry>
- </para>
- </refsect1>
-
-</refentry>