man/sd_bus_set_sender.xml

   1 <?xml version='1.0'?>
   2 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   3   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
   4 <!-- SPDX-License-Identifier: LGPL-2.1+ -->
   5
   6 <refentry id="sd_bus_set_sender"
   7           xmlns:xi="http://www.w3.org/2001/XInclude">
   8
   9   <refentryinfo>
  10     <title>sd_bus_set_sender</title>
  11     <productname>systemd</productname>
  12   </refentryinfo>
  13
  14   <refmeta>
  15     <refentrytitle>sd_bus_set_sender</refentrytitle>
  16     <manvolnum>3</manvolnum>
  17   </refmeta>
  18
  19   <refnamediv>
  20     <refname>sd_bus_set_sender</refname>
  21     <refname>sd_bus_get_sender</refname>
  22
  23     <refpurpose>Configure default sender for outgoing messages</refpurpose>
  24   </refnamediv>
  25
  26   <refsynopsisdiv>
  27     <funcsynopsis>
  28       <funcsynopsisinfo>#include &lt;systemd/sd-bus.h&gt;</funcsynopsisinfo>
  29
  30       <funcprototype>
  31         <funcdef>int <function>sd_bus_set_sender</function></funcdef>
  32         <paramdef>sd_bus *<parameter>bus</parameter></paramdef>
  33         <paramdef>const char* <parameter>name</parameter></paramdef>
  34       </funcprototype>
  35
  36       <funcprototype>
  37         <funcdef>int <function>sd_bus_get_sender</function></funcdef>
  38         <paramdef>sd_bus *<parameter>bus</parameter></paramdef>
  39         <paramdef>const char** <parameter>name</parameter></paramdef>
  40       </funcprototype>
  41
  42     </funcsynopsis>
  43   </refsynopsisdiv>
  44
  45   <refsect1>
  46     <title>Description</title>
  47
  48     <para><function>sd_bus_set_sender()</function> configures the default sender service name to use for outgoing
  49     messages. The service name specified in the <parameter>name</parameter> parameter is set on all outgoing messages
  50     that are sent on the connection and have no sender set yet, for example through
  51     <citerefentry><refentrytitle>sd_bus_message_set_sender</refentrytitle><manvolnum>3</manvolnum></citerefentry>. Note
  52     that this function is only supported on direct connections, i.e. not on connections to a bus broker as the broker
  53     will fill in the sender service name automatically anyway. By default no sender name is configured, and hence
  54     messages are sent without sender field set. If the <parameter>name</parameter> parameter is specified as
  55     <constant>NULL</constant> the default sender service name is cleared, returning to the default state if a default
  56     sender service name was set before. If passed as non-<constant>NULL</constant> the specified name must be a valid
  57     unique or well-known service name.</para>
  58
  59     <para><function>sd_bus_get_sender()</function> may be used to query the current default service name for outgoing
  60     messages.</para>
  61   </refsect1>
  62
  63   <refsect1>
  64     <title>Return Value</title>
  65
  66     <para>On success, these functions return 0 or a positive integer. On failure, they return a negative
  67     errno-style error code.</para>
  68
  69     <refsect2>
  70       <title>Errors</title>
  71
  72       <para>Returned errors may indicate the following problems:</para>
  73
  74       <variablelist>
  75         <varlistentry>
  76           <term><constant>-ECHILD</constant></term>
  77
  78           <listitem><para>The bus connection has been created in a different process.</para></listitem>
  79         </varlistentry>
  80
  81         <varlistentry>
  82           <term><constant>-EPERM</constant></term>
  83
  84           <listitem><para>The specified bus connection object is a not a direct but a brokered
  85           connection.</para></listitem>
  86         </varlistentry>
  87       </variablelist>
  88     </refsect2>
  89   </refsect1>
  90
  91   <xi:include href="libsystemd-pkgconfig.xml" />
  92
  93   <refsect1>
  94     <title>See Also</title>
  95
  96     <para>
  97       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
  98       <citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
  99       <citerefentry><refentrytitle>sd_bus_message_set_sender</refentrytitle><manvolnum>3</manvolnum></citerefentry>
 100     </para>
 101   </refsect1>
 102
 103 </refentry>