"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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This file is part of systemd.
Copyright 2014 Zbigniew Jędrzejewski-Szmek
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<refentry id="sd_event_add_signal" xmlns:xi="http://www.w3.org/2001/XInclude">
<citerefentry><refentrytitle>sd_event_source_unref</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
but note that the event source is only removed from the event loop
when all references to the event source are dropped. To make sure
- an event source does not fire anymore, even when there's still a
- reference to it kept, consider setting the event source to
- <constant>SD_EVENT_OFF</constant> with
- <citerefentry><refentrytitle>sd_event_source_set_enabled</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para>
+ an event source does not fire anymore, even if it is still referenced,
+ disable the event source using
+ <citerefentry><refentrytitle>sd_event_source_set_enabled</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ with <constant>SD_EVENT_OFF</constant>.</para>
<para>If the second parameter of
- <function>sd_event_add_signal()</function> is passed as NULL no
- reference to the event source object is returned. In this case the
- event source is considered "floating", and will be destroyed
- implicitly when the event loop itself is destroyed.</para>
-
- <para><function>sd_event_source_get_signal()</function> retrieves
- the configured UNIX process signal number of a signal event source
- created previously with
- <function>sd_event_add_signal()</function>. It takes the event
- source object as the <parameter>source</parameter>
+ <function>sd_event_add_signal()</function> is
+ <constant>NULL</constant> no reference to the event source object
+ is returned. In this case the event source is considered
+ "floating", and will be destroyed implicitly when the event loop
+ itself is destroyed.</para>
+
+ <para><function>sd_event_source_get_signal()</function> returns
+ the configured signal number of an event source created previously
+ with <function>sd_event_add_signal()</function>. It takes the
+ event source object as the <parameter>source</parameter>
parameter.</para>
-
</refsect1>
<refsect1>
<para>On success, these functions return 0 or a positive
integer. On failure, they return a negative errno-style error
- code. </para>
+ code.</para>
</refsect1>
<refsect1>
<term><constant>-EINVAL</constant></term>
<listitem><para>An invalid argument has been passed.</para></listitem>
-
</varlistentry>
<varlistentry>
<listitem><para>A handler is already installed for this
signal or the signal was not blocked previously.</para></listitem>
-
</varlistentry>
<varlistentry>
<term><constant>-ESTALE</constant></term>
<listitem><para>The event loop is already terminated.</para></listitem>
-
</varlistentry>
<varlistentry>
<term><constant>-ECHILD</constant></term>
<listitem><para>The event loop has been created in a different process.</para></listitem>
-
</varlistentry>
<varlistentry>