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