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<?xml version='1.0'?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!-- SPDX-License-Identifier: LGPL-2.1+ -->
<refentry id="sd_bus_set_description" xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>sd_bus_set_description</title>
<productname>systemd</productname>
</refentryinfo>
<refmeta>
<refentrytitle>sd_bus_set_description</refentrytitle>
<manvolnum>3</manvolnum>
</refmeta>
<refnamediv>
<refname>sd_bus_set_description</refname>
<refname>sd_bus_get_description</refname>
<refname>sd_bus_set_anonymous</refname>
<refname>sd_bus_set_trusted</refname>
<refname>sd_bus_set_allow_interactive_authorization</refname>
<refname>sd_bus_get_allow_interactive_authorization</refname>
<refpurpose>Set or query properties of a bus object</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
<funcprototype>
<funcdef>int <function>sd_bus_set_description</function></funcdef>
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
<paramdef>const char *<parameter>description</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>int <function>sd_bus_get_description</function></funcdef>
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
<paramdef>const char **<parameter>description</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>int <function>sd_bus_set_anonymous</function></funcdef>
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
<paramdef>int <parameter>b</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>int <function>sd_bus_set_trusted</function></funcdef>
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
<paramdef>int <parameter>b</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>int <function>sd_bus_set_allow_interactive_authorization</function></funcdef>
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
<paramdef>int <parameter>b</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>int <function>sd_bus_get_allow_interactive_authorization</function></funcdef>
<paramdef>sd_bus *<parameter>bus</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><function>sd_bus_set_description()</function> sets the description string
that is used in logging to the specified string. The string is copied internally
and freed when the bus object is deallocated. The
<parameter>description</parameter> argument may be <constant>NULL</constant>, in
which case the description is unset. This function must be called before the bus
has been started.</para>
<para><function>sd_bus_get_description()</function> returns a description string
in <parameter>description</parameter>. This string may have been previously set
with <function>sd_bus_set_description()</function> or
<citerefentry><refentrytitle>sd_bus_open_with_description</refentrytitle><manvolnum>3</manvolnum></citerefentry>
or similar. If not set this way, a default string like <literal>system</literal>
or <literal>user</literal> will be returned for the system or user buses,
and <constant>NULL</constant> otherwise.</para>
<para><function>sd_bus_set_anonymous()</function> enables or disables "anonymous
authentication", i.e. lack of authentication, of the bus peer. This function must
be called before the bus has been started. See the <ulink
url="view-source:https://dbus.freedesktop.org/doc/dbus-specification.html#auth-mechanisms">Authentication
Mechanisms</ulink> section of the D-Bus specification for details.</para>
<para><function>sd_bus_set_trusted()</function> sets the "trusted" state on the
<parameter>bus</parameter> object. If true, all connections on the bus are
trusted and access to all privileged and unprivileged methods is granted. This
function must be called before the bus has been started.</para>
<para><function>sd_bus_set_allow_interactive_authorization()</function>
enables or disables interactive authorization for method calls. If true,
messages are marked with the
<constant>ALLOW_INTERACTIVE_AUTHORIZATION</constant> flag specified by the
<ulink
url="view-source:https://dbus.freedesktop.org/doc/dbus-specification.html">D-Bus</ulink>
specification, informing the receiving side that the caller is prepared to
wait for interactive authorization, which might take a considerable time to
complete. If this flag is set, the user may be queried for passwords or
confirmation via <ulink
url="http://www.freedesktop.org/wiki/Software/polkit">polkit</ulink> or a
similar framework.</para>
<para><function>sd_bus_get_allow_interactive_authorization()</function> returns
true if interactive authorization is allowed and false if not.</para>
</refsect1>
<refsect1>
<title>Return Value</title>
<para>On success, these functions return 0 or a positive integer. On failure, they return a negative
errno-style error code.</para>
<refsect2>
<title>Errors</title>
<para>Returned errors may indicate the following problems:</para>
<variablelist>
<varlistentry>
<term><constant>-EINVAL</constant></term>
<listitem><para>An argument is invalid.</para></listitem>
</varlistentry>
<varlistentry>
<term><constant>-ENOPKG</constant></term>
<listitem><para>The bus cannot be resolved.</para></listitem>
</varlistentry>
<varlistentry>
<term><constant>-EPERM</constant></term>
<listitem><para>The bus has already been started.</para></listitem>
</varlistentry>
<varlistentry>
<term><constant>-ECHILD</constant></term>
<listitem><para>The bus was created in a different process.</para></listitem>
</varlistentry>
<varlistentry>
<term><constant>-ENOMEM</constant></term>
<listitem><para>Memory allocation failed.</para></listitem>
</varlistentry>
</variablelist>
</refsect2>
</refsect1>
<xi:include href="libsystemd-pkgconfig.xml" />
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_bus_default_user</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_bus_default_system</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_bus_open_user</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_bus_open_system</refentrytitle><manvolnum>3</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
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