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Diffstat (limited to 'man/sd_bus_set_connected_signal.xml')
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diff --git a/man/sd_bus_set_connected_signal.xml b/man/sd_bus_set_connected_signal.xml new file mode 100644 index 0000000..32fc630 --- /dev/null +++ b/man/sd_bus_set_connected_signal.xml @@ -0,0 +1,112 @@ +<?xml version='1.0'?> +<!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_set_connected_signal" + xmlns:xi="http://www.w3.org/2001/XInclude"> + + <refentryinfo> + <title>sd_bus_set_connected_signal</title> + <productname>systemd</productname> + </refentryinfo> + + <refmeta> + <refentrytitle>sd_bus_set_connected_signal</refentrytitle> + <manvolnum>3</manvolnum> + </refmeta> + + <refnamediv> + <refname>sd_bus_set_connected_signal</refname> + <refname>sd_bus_get_connected_signal</refname> + + <refpurpose>Control emmission of local connection establishment signal on bus connections</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <funcsynopsis> + <funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo> + + <funcprototype> + <funcdef>int <function>sd_bus_set_connected_signal</function></funcdef> + <paramdef>sd_bus *<parameter>bus</parameter></paramdef> + <paramdef>int <parameter>b</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_bus_get_connected_signal</function></funcdef> + <paramdef>sd_bus *<parameter>bus</parameter></paramdef> + </funcprototype> + + </funcsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para><function>sd_bus_set_connected_signal()</function> may be used to control whether a local, synthetic + <function>Connected()</function> signal message shall be generated and enqueued for dispatching when the connection + is fully established. If the <parameter>b</parameter> parameter is zero the message is not generated (the default), + otherwise it is generated.</para> + + <para><function>sd_bus_get_connected_signal()</function> may be used to query whether this feature is enabled. It + returns zero if not, positive otherwise.</para> + + <para>The <function>Connected()</function> signal message is generated from the + <literal>org.freedesktop.DBus.Local</literal> service and interface, and + <literal>/org/freedesktop/DBus/Local</literal> object path. Use + <citerefentry><refentrytitle>sd_bus_match_signal_async</refentrytitle><manvolnum>3</manvolnum></citerefentry> to + match on this signal.</para> + + <para>This message is particularly useful on slow transports where connections take a long time to be + established. This is especially the case when + <citerefentry><refentrytitle>sd_bus_set_watch_bind</refentrytitle><manvolnum>3</manvolnum></citerefentry> is + used. The signal is generated when the + <citerefentry><refentrytitle>sd_bus_is_ready</refentrytitle><manvolnum>3</manvolnum></citerefentry> returns + positive for the first time.</para> + + <para>The <function>Connected()</function> signal corresponds with the <function>Disconnected()</function> signal + that is synthesized locally when the connection is terminated. The latter is generated unconditionally however, + unlike the former which needs to be enabled explicitly before it is generated, with + <function>sd_bus_set_connected_signal()</function>.</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>-ECHILD</constant></term> + + <listitem><para>The bus connection has been created in a different process.</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_match_signal_async</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd_bus_set_watch_bind</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd_bus_is_ready</refentrytitle><manvolnum>3</manvolnum></citerefentry> + </para> + </refsect1> + +</refentry> |