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Diffstat (limited to 'man/sd_bus_message_get_cookie.xml')
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diff --git a/man/sd_bus_message_get_cookie.xml b/man/sd_bus_message_get_cookie.xml new file mode 100644 index 0000000000..28c8737005 --- /dev/null +++ b/man/sd_bus_message_get_cookie.xml @@ -0,0 +1,152 @@ +<?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"> + +<!-- + This file is part of systemd. + + Copyright 2013 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_bus_message_get_cookie"> + + <refentryinfo> + <title>sd_bus_message_get_cookie</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_bus_message_get_cookie</refentrytitle> + <manvolnum>3</manvolnum> + </refmeta> + + <refnamediv> + <refname>sd_bus_message_get_cookie</refname> + <refname>sd_bus_message_get_reply_cookie</refname> + <refpurpose>Returns the transaction cookie of a message</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <funcsynopsis> + <funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo> + + <funcprototype> + <funcdef>int <function>sd_bus_message_get_cookie</function></funcdef> + <paramdef>sd_bus_message* <parameter>message</parameter></paramdef> + <paramdef>uint64_t* <parameter>cookie</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_bus_message_get_reply_cookie</function></funcdef> + <paramdef>sd_bus_message* <parameter>message</parameter></paramdef> + <paramdef>uint64_t* <parameter>cookie</parameter></paramdef> + </funcprototype> + </funcsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para><function>sd_bus_message_get_cookie()</function> returns + the transaction cookie of a message. The cookie + uniquely identifies a message within each bus peer, + but is not globally unique. It is assigned when a + message is sent.</para> + + <para><function>sd_bus_message_get_reply_cookie()</function> + returns the transaction cookie of the message the + specified message is a response to. When a reply + message is generated for a method call message its + cookie is copied over into this field. Note that while + every message that is transferred is identified by a + cookie, only response messages carry a reply cookie + field.</para> + + <para>Both functions take a message object as first + parameter and a place to store the 64bit cookie + in.</para> + </refsect1> + + <refsect1> + <title>Return Value</title> + + <para>On success, these calls return 0 or a positive + integer. On failure, these calls return a negative + errno-style error code.</para> + + <para>On success the cookie/reply cookie is returned + in the specified 64bit unsigned integer variable.</para> + </refsect1> + + <refsect1> + <title>Errors</title> + + <para>Returned errors may indicate the following problems:</para> + + <variablelist> + <varlistentry> + <term><varname>-EINVAL</varname></term> + + <listitem><para>A specified parameter + is invalid.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>-ENODATA</varname></term> + + <listitem><para>No cookie has been + assigned to this message. This either + indicates that the message has not + been sent yet and hence has no cookie + assigned, or that the message is not a + method response message and hence + carries to reply cookie + field.</para></listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>Notes</title> + + <para>The <function>sd_bus_message_get_cookie()</function> + and <function>sd_bus_message_get_reply_cookie()</function> + interfaces are available as shared library, which can + be compiled and linked to with the + <constant>libsystemd-bus</constant> <citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry> + file.</para> + </refsect1> + + <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_new</refentrytitle><manvolnum>3</manvolnum></citerefentry> + </para> + </refsect1> + +</refentry> |