c3362c2f97
A warning is emitted from sd_bus_message_{get,set}_priority. Those functions
are exposed by pystemd, so we have no easy way of checking if anything is
calling them.
Just making the functions always return without doing anything would be an
option, but then we could leave the caller with an undefined variable. So I
think it's better to make the functions emit a warnings and return priority=0
in the get operation.
108 lines
3.7 KiB
XML
108 lines
3.7 KiB
XML
<?xml version='1.0'?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//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_dump"
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xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>sd_bus_message_dump</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_dump</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_dump</refname>
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<refpurpose>Produce a string representation of a message for debugging purposes</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>int sd_bus_message_dump</funcdef>
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<paramdef>sd_bus_message *<parameter>m</parameter></paramdef>
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<paramdef>FILE *<parameter>f</parameter></paramdef>
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<paramdef>uint64_t <parameter>flags</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<para>
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<constant>SD_BUS_MESSAGE_DUMP_WITH_HEADER</constant>,
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<constant>SD_BUS_MESSAGE_DUMP_SUBTREE_ONLY</constant>
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</para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>The <function>sd_bus_message_dump()</function> function writes a textual representation of the
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message <parameter>m</parameter> to the stream <parameter>f</parameter>. This function is intended to be
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used for debugging purposes, and the output is neither stable nor designed to be machine readable.
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</para>
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<para>The <parameter>flags</parameter> parameter may be used to modify the output. With
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<constant>SD_BUS_MESSAGE_DUMP_WITH_HEADER</constant>, a header that specifies the message type and flags
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and some additional metadata is printed. When <constant>SD_BUS_MESSAGE_DUMP_SUBTREE_ONLY</constant> is
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not passed, the contents of the whole message are printed. When it <emphasis>is</emphasis> passed,
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only the current container in printed.</para>
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<para>Note that this function moves the read pointer of the message. It may be necessary to reset the
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position afterwards, for example with
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<citerefentry><refentrytitle>sd_bus_message_rewind</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
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</para>
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</refsect1>
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<refsect1>
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<title>Examples</title>
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<para>Output for a signal message (with <constant>SD_BUS_MESSAGE_DUMP_WITH_HEADER</constant>):
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<programlisting>
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‣ Type=signal Endian=l Flags=1 Version=1 Cookie=22
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Path=/value/a Interface=org.freedesktop.DBus.Properties Member=PropertiesChanged
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MESSAGE "sa{sv}as" {
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STRING "org.freedesktop.systemd.ValueTest";
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ARRAY "{sv}" {
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DICT_ENTRY "sv" {
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STRING "Value";
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VARIANT "s" {
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STRING "object 0x1e, path /value/a";
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};
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};
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};
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ARRAY "s" {
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STRING "Value2";
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STRING "AnExplicitProperty";
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};
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};
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</programlisting>
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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, this function returns 0 or a positive integer. On failure, it returns a negative
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errno-style error code. No error codes are currently defined.</para>
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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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</para>
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</refsect1>
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</refentry>
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