service: add new RootImageOptions feature

[thirdparty/systemd.git] / man / sd_bus_send.xml

diff --git a/man/sd_bus_send.xml b/man/sd_bus_send.xml
index 659fa2a86ce7c5b2fb676f06d2844b6d50787f4b..2cdf436db2bc981857f798cbbd3e4c45322f9ce6 100644 (file)
--- a/man/sd_bus_send.xml
+++ b/man/sd_bus_send.xml
@@ -18,6 +18,7 @@
 
   <refnamediv>
     <refname>sd_bus_send</refname>
+    <refname>sd_bus_send_to</refname>
 
     <refpurpose>Queue a D-Bus message for transfer</refpurpose>
   </refnamediv>
@@ -32,35 +33,48 @@
         <paramdef>sd_bus_message *<parameter>m</parameter></paramdef>
         <paramdef>uint64_t *<parameter>cookie</parameter></paramdef>
       </funcprototype>
+
+      <funcprototype>
+        <funcdef>int <function>sd_bus_send_to</function></funcdef>
+        <paramdef>sd_bus *<parameter>bus</parameter></paramdef>
+        <paramdef>sd_bus_message *<parameter>m</parameter></paramdef>
+        <paramdef>const char *<parameter>destination</parameter></paramdef>
+        <paramdef>uint64_t *<parameter>cookie</parameter></paramdef>
+      </funcprototype>
     </funcsynopsis>
   </refsynopsisdiv>
 
   <refsect1>
     <title>Description</title>
 
-    <para><function>sd_bus_send()</function> queues the bus message object <parameter>m</parameter>
-    for transfer. If <parameter>bus</parameter> is <constant>NULL</constant>, the bus that
-    <parameter>m</parameter> is attached to is used. <parameter>bus</parameter> only needs to be set
-    when the message is sent to a different bus than the one it's attached to, for example when
-    forwarding messages. If the output parameter <parameter>cookie</parameter> is not
-    <constant>NULL</constant>, it is set to the message identifier. This value can later be used to
-    match incoming replies to their corresponding messages. If <parameter>cookie</parameter> is set
-    to <constant>NULL</constant> and the message is not sealed, <function>sd_bus_send()</function>
-    assumes the message <parameter>m</parameter> doesn't expect a reply and adds the necessary
-    headers to indicate this.</para>
+    <para><function>sd_bus_send()</function> queues the bus message object <parameter>m</parameter> for
+    transfer. If <parameter>bus</parameter> is <constant>NULL</constant>, the bus that
+    <parameter>m</parameter> is attached to is used. <parameter>bus</parameter> only needs to be set when the
+    message is sent to a different bus than the one it's attached to, for example when forwarding messages.
+    If the output parameter <parameter>cookie</parameter> is not <constant>NULL</constant>, it is set to the
+    message identifier. This value can later be used to match incoming replies to their corresponding
+    messages. If <parameter>cookie</parameter> is set to <constant>NULL</constant> and the message is not
+    sealed, <function>sd_bus_send()</function> assumes the message <parameter>m</parameter> doesn't expect a
+    reply and adds the necessary headers to indicate this.</para>
 
     <para>Note that in most scenarios, <function>sd_bus_send()</function> should not be called
     directly. Instead, use higher level functions such as
     <citerefentry><refentrytitle>sd_bus_call_method</refentrytitle><manvolnum>3</manvolnum></citerefentry> and
     <citerefentry><refentrytitle>sd_bus_reply_method_return</refentrytitle><manvolnum>3</manvolnum></citerefentry>
     which call <function>sd_bus_send()</function> internally.</para>
+
+    <para><function>sd_bus_send_to()</function> is a shorthand for sending a message to a specific
+    destination. It's main use case is to simplify sending unicast signal messages (signals that only have a
+    single receiver). It's behavior is similar to calling
+    <citerefentry><refentrytitle>sd_bus_message_set_destination</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+    followed by calling <function>sd_bus_send()</function>.</para>
   </refsect1>
 
   <refsect1>
     <title>Return Value</title>
 
-    <para>On success, this function returns a non-negative integer. On failure, it returns a
-    negative errno-style error code.</para>
+    <para>On success, these functions return a non-negative integer. On failure, they return a negative
+    errno-style error code.</para>
 
     <refsect2 id='errors'>
       <title>Errors</title>
@@ -85,8 +99,8 @@
         <varlistentry>
           <term><constant>-ECHILD</constant></term>
 
-          <listitem><para>The bus connection was allocated in a parent process and is being reused
-          in a child process after <function>fork()</function>.</para></listitem>
+          <listitem><para>The bus connection was allocated in a parent process and is being reused in a child
+          process after <function>fork()</function>.</para></listitem>
         </varlistentry>
 
         <varlistentry>
@@ -128,8 +142,7 @@
       <citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>sd_bus_call_method</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>sd_bus_message_set_destination</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
-      <citerefentry><refentrytitle>sd_bus_reply_method_return</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
-      <citerefentry><refentrytitle>sd_bus_send_to</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+      <citerefentry><refentrytitle>sd_bus_reply_method_return</refentrytitle><manvolnum>3</manvolnum></citerefentry>
     </para>
   </refsect1>