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man: add sd_bus_message_get_signature(3)
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@ -213,6 +213,10 @@ manpages = [
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'3',
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'3',
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['sd_bus_message_get_realtime_usec', 'sd_bus_message_get_seqnum'],
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['sd_bus_message_get_realtime_usec', 'sd_bus_message_get_seqnum'],
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''],
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''],
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['sd_bus_message_get_signature',
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'3',
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['sd_bus_message_has_signature', 'sd_bus_message_is_empty'],
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''],
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['sd_bus_message_get_type',
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['sd_bus_message_get_type',
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'3',
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'3',
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['sd_bus_message_is_method_call',
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['sd_bus_message_is_method_call',
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@ -60,6 +60,7 @@
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<citerefentry><refentrytitle>sd_bus_message_copy</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_copy</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_get_cookie</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_get_cookie</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_get_monotonic_usec</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_get_monotonic_usec</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_get_signature</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_get_type</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_get_type</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_new_method_call</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_new_method_call</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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111
man/sd_bus_message_get_signature.xml
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111
man/sd_bus_message_get_signature.xml
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@ -0,0 +1,111 @@
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<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!-- SPDX-License-Identifier: LGPL-2.1+ -->
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<refentry id="sd_bus_message_get_signature" xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>sd_bus_message_get_signature</title>
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<productname>systemd</productname>
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</refentryinfo>
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<refmeta>
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<refentrytitle>sd_bus_message_get_signature</refentrytitle>
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<manvolnum>3</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>sd_bus_message_get_signature</refname>
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<refname>sd_bus_message_is_empty</refname>
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<refname>sd_bus_message_has_signature</refname>
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<refpurpose>Query bus message signature</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<funcsynopsis>
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<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
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<funcprototype>
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<funcdef>const char* <function>sd_bus_message_get_signature</function></funcdef>
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<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
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<paramdef>int <parameter>complete</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_message_is_empty</function></funcdef>
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<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_message_has_signature</function></funcdef>
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<paramdef>sd_bus_message *<parameter>message</parameter></paramdef>
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<paramdef>const char *<parameter>signature</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><function>sd_bus_message_get_signature()</function> returns the signature of message
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<parameter>message</parameter>. If <parameter>complete</parameter> is true, the signature of the
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whole message is returned, and just the signature of the currently open container otherwise.
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</para>
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<para><function>sd_bus_message_is_empty()</function> returns true if the message is empty,
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i.e. when its signature is empty.</para>
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<para><function>sd_bus_message_has_signature()</function> returns true if the signature of the
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message <parameter>message</parameter> matches given <parameter>signature</parameter>. Parameter
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<parameter>signature</parameter> may be <constant>NULL</constant>, this is treated the same as
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an empty string, which is equivalent to calling <function>sd_bus_message_is_empty()</function>.
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</para>
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</refsect1>
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<refsect1>
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<title>Return Value</title>
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<para>On success, <function>sd_bus_message_get_signature()</function> returns
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the signature, and <constant>NULL</constant> on error.</para>
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<para>The other functions return 0 or a positive integer on success. On failure, they return a
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negative errno-style error code.</para>
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</refsect1>
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<refsect1>
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<title>Errors</title>
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<para>Returned errors may indicate the following problems:</para>
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<variablelist>
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<varlistentry>
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<term><constant>-EINVAL</constant></term>
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<listitem><para>The <parameter>message</parameter> parameter is <constant>NULL</constant>.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>NULL</constant></term>
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<listitem><para>The <parameter>message</parameter> parameter is <constant>NULL</constant>.
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</para></listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<xi:include href="libsystemd-pkgconfig.xml" />
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_message_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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