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+<?xml version='1.0'?> <!--*-nxml-*-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+ "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+<!-- SPDX-License-Identifier: LGPL-2.1+ -->
+
+<refentry id="sd_bus_message_set_expect_reply" xmlns:xi="http://www.w3.org/2001/XInclude">
+
+ <refentryinfo>
+ <title>sd_bus_message_set_expect_reply</title>
+ <productname>systemd</productname>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>sd_bus_message_set_expect_reply</refentrytitle>
+ <manvolnum>3</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>sd_bus_message_set_expect_reply</refname>
+ <refname>sd_bus_message_get_expect_reply</refname>
+ <refname>sd_bus_message_set_auto_start</refname>
+ <refname>sd_bus_message_get_auto_start</refname>
+
+ <refpurpose>Set and query bus message metadata</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include &lt;systemd/sd-bus.h&gt;</funcsynopsisinfo>
+
+ <funcprototype>
+ <funcdef>int <function>sd_bus_message_set_expect_reply</function></funcdef>
+ <paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
+ <paramdef>int <parameter>b</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>int <function>sd_bus_message_get_expect_reply</function></funcdef>
+ <paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>int <function>sd_bus_message_set_auto_start</function></funcdef>
+ <paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
+ <paramdef>int <parameter>b</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>int <function>sd_bus_message_get_auto_start</function></funcdef>
+ <paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><function>sd_bus_message_set_expect_reply()</function> sets or clears the
+ <constant>NO_REPLY_EXPECTED</constant> flag on the message <parameter>m</parameter>. This flag
+ matters only for method call messages and is used to specify that no method return or error
+ reply is expected. It is ignored for other types. Thus, for a method call message, calling
+ <programlisting>sd_bus_message_set_expect_reply(…, 0)</programlisting> sets the flag and
+ suppresses the reply.</para>
+
+ <para><function>sd_bus_message_get_expect_reply()</function> checks if the
+ <constant>NO_REPLY_EXPECTED</constant> flag is set on the message <parameter>m</parameter>. It
+ will return positive if it is not set, and zero if it is.</para>
+
+ <para><function>sd_bus_message_set_auto_start()</function> sets or clears the
+ <constant>NO_AUTO_START</constant> flag on the message <parameter>m</parameter>. When the flag
+ is set the bus must not launch an owner for the destination name in response to this message.
+ Calling
+ <programlisting>sd_bus_message_set_auto_start(…, 0)</programlisting> sets the flag.
+ </para>
+
+ <para><function>sd_bus_message_get_auto_start()</function> checks if the
+ <constant>NO_AUTO_START</constant> flag is set on the message <parameter>m</parameter>. It
+ will return positive if it is not set, and zero if it is.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Return Value</title>
+
+ <para>On success, these functions 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 <parameter>message</parameter> parameter is
+ <constant>NULL</constant>.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><constant>-EPERM</constant></term>
+
+ <listitem><para>The message <parameter>message</parameter> is sealed
+ when trying to set a flag.</para>
+
+ <para>The message <parameter>message</parameter> has wrong
+ type.</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-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd_bus_set_description</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>