man/sd_bus_set_sender.xml

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   2 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
   3 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
   4
   5 <!--
   6   SPDX-License-Identifier: LGPL-2.1+
   7 -->
   8
   9 <refentry id="sd_bus_set_sender">
  10
  11   <refentryinfo>
  12     <title>sd_bus_set_sender</title>
  13     <productname>systemd</productname>
  14   </refentryinfo>
  15
  16   <refmeta>
  17     <refentrytitle>sd_bus_set_sender</refentrytitle>
  18     <manvolnum>3</manvolnum>
  19   </refmeta>
  20
  21   <refnamediv>
  22     <refname>sd_bus_set_sender</refname>
  23     <refname>sd_bus_get_sender</refname>
  24
  25     <refpurpose>Configure default sender for outgoing messages</refpurpose>
  26   </refnamediv>
  27
  28   <refsynopsisdiv>
  29     <funcsynopsis>
  30       <funcsynopsisinfo>#include &lt;systemd/sd-bus.h&gt;</funcsynopsisinfo>
  31
  32       <funcprototype>
  33         <funcdef>int <function>sd_bus_set_sender</function></funcdef>
  34         <paramdef>sd_bus *<parameter>bus</parameter></paramdef>
  35         <paramdef>const char* <parameter>name</parameter></paramdef>
  36       </funcprototype>
  37
  38       <funcprototype>
  39         <funcdef>int <function>sd_bus_get_sender</function></funcdef>
  40         <paramdef>sd_bus *<parameter>bus</parameter></paramdef>
  41         <paramdef>const char** <parameter>name</parameter></paramdef>
  42       </funcprototype>
  43
  44     </funcsynopsis>
  45   </refsynopsisdiv>
  46
  47   <refsect1>
  48     <title>Description</title>
  49
  50     <para><function>sd_bus_set_sender()</function> configures the default sender service name to use for outgoing
  51     messages. The service name specified in the <parameter>name</parameter> parameter is set on all outgoing messages
  52     that are sent on the connection and have no sender set yet, for example through
  53     <citerefentry><refentrytitle>sd_bus_message_set_sender</refentrytitle><manvolnum>3</manvolnum></citerefentry>. Note
  54     that this function is only supported on direct connections, i.e. not on connections to a bus broker as the broker
  55     will fill in the sender service name automatically anyway. By default no sender name is configured, and hence
  56     messages are sent without sender field set. If the <parameter>name</parameter> parameter is specified as
  57     <constant>NULL</constant> the default sender service name is cleared, returning to the default state if a default
  58     sender service name was set before. If passed as non-<constant>NULL</constant> the specified name must be a valid
  59     unique or well-known service name.</para>
  60
  61     <para><function>sd_bus_get_sender()</function> may be used to query the current default service name for outgoing
  62     messages.</para>
  63   </refsect1>
  64
  65   <refsect1>
  66     <title>Return Value</title>
  67
  68     <para>On success, these functions return 0 or a positive integer. On failure, they return a negative errno-style
  69     error code.</para>
  70   </refsect1>
  71
  72   <refsect1>
  73     <title>Errors</title>
  74
  75     <para>Returned errors may indicate the following problems:</para>
  76
  77     <variablelist>
  78       <varlistentry>
  79         <term><constant>-ECHILD</constant></term>
  80
  81         <listitem><para>The bus connection has been created in a different process.</para></listitem>
  82       </varlistentry>
  83
  84       <varlistentry>
  85         <term><constant>-EPERM</constant></term>
  86
  87         <listitem><para>The specified bus connection object is a not a direct but a brokered connection.</para></listitem>
  88       </varlistentry>
  89     </variablelist>
  90   </refsect1>
  91
  92   <refsect1>
  93     <title>Notes</title>
  94
  95     <para><function>sd_bus_set_sender()</function> and <function>sd_bus_get_sender()</function> are available as
  96     a shared library, which can be compiled and linked to with the <constant>libsystemd</constant> <citerefentry
  97     project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry> file.</para>
  98   </refsect1>
  99
 100   <refsect1>
 101     <title>See Also</title>
 102
 103     <para>
 104       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 105       <citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
 106       <citerefentry><refentrytitle>sd_bus_message_set_sender</refentrytitle><manvolnum>3</manvolnum></citerefentry>
 107     </para>
 108   </refsect1>
 109
 110 </refentry>