mirror of
https://github.com/systemd/systemd.git
synced 2024-11-05 15:21:37 +03:00
8274a30d0e
These man pages list references to the various sd_event_add_xyz() calls at the bottom, but sd_event_add_inotify() was never added there. Moreover, some list references to sd_event_add_post() and sd_event_add_exit() even though these have shared man pages with sd_event_add_defer(), and given that the "SEE ALSO" section should probably reference pages instead of functions let's drop this. Then, let's always specify the sd_event_add_xyz() calls in the same order. Finally, in the sd_event_new(3) text explaining the basic logic, actually mention sd_event_add_post() and sd_event_add_exit() as well, as in that case we actually want to list functions, not man pages.
97 lines
3.8 KiB
XML
97 lines
3.8 KiB
XML
<?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_event_source_set_userdata" xmlns:xi="http://www.w3.org/2001/XInclude">
|
|
|
|
<refentryinfo>
|
|
<title>sd_event_source_set_userdata</title>
|
|
<productname>systemd</productname>
|
|
</refentryinfo>
|
|
|
|
<refmeta>
|
|
<refentrytitle>sd_event_source_set_userdata</refentrytitle>
|
|
<manvolnum>3</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>sd_event_source_set_userdata</refname>
|
|
<refname>sd_event_source_get_userdata</refname>
|
|
|
|
<refpurpose>Set or retrieve user data pointer of event sources</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<funcsynopsis>
|
|
<funcsynopsisinfo>#include <systemd/sd-event.h></funcsynopsisinfo>
|
|
|
|
<funcprototype>
|
|
<funcdef>void* <function>sd_event_source_set_userdata</function></funcdef>
|
|
<paramdef>sd_event_source *<parameter>source</parameter></paramdef>
|
|
<paramdef>void *<parameter>userdata</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>void* <function>sd_event_source_get_userdata</function></funcdef>
|
|
<paramdef>sd_event_source *<parameter>source</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
</funcsynopsis>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para><function>sd_event_source_set_userdata()</function> may be
|
|
used to set an arbitrary user data pointer for the event source
|
|
object specified as <parameter>source</parameter>. The user data
|
|
pointer is usually specified when creating an event source object
|
|
with calls such as
|
|
<citerefentry><refentrytitle>sd_event_add_io</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
or
|
|
<citerefentry><refentrytitle>sd_event_add_time</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
|
and may be updated with this call. The user data pointer is also
|
|
passed to all handler callback functions associated with the event
|
|
source. The <parameter>userdata</parameter> parameter specifies
|
|
the new user data pointer to set, the function returns the
|
|
previous user data pointer. Note that <constant>NULL</constant> is
|
|
a valid user data pointer.</para>
|
|
|
|
<para><function>sd_event_source_get_userdata()</function> may be
|
|
used to query the current user data pointer assigned to the event
|
|
source object <parameter>source</parameter>.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Return Value</title>
|
|
|
|
<para>On success,
|
|
<function>sd_event_source_set_userdata()</function> and
|
|
<function>sd_event_source_get_userdata()</function> return the
|
|
previously set user data pointer. On failure, they return
|
|
NULL.</para>
|
|
</refsect1>
|
|
|
|
<xi:include href="libsystemd-pkgconfig.xml" />
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
|
|
<para>
|
|
<citerefentry><refentrytitle>sd-event</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>sd_event_add_io</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>sd_event_add_time</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>sd_event_add_signal</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>sd_event_add_child</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>sd_event_add_inotify</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>sd_event_add_defer</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>sd_event_source_set_description</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|