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177 lines
6.7 KiB
XML
177 lines
6.7 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-or-later -->
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<refentry id="sd_bus_reply_method_error"
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xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>sd_bus_reply_method_error</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_reply_method_error</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_reply_method_error</refname>
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<refname>sd_bus_reply_method_errorf</refname>
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<refname>sd_bus_reply_method_errorfv</refname>
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<refname>sd_bus_reply_method_errno</refname>
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<refname>sd_bus_reply_method_errnof</refname>
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<refname>sd_bus_reply_method_errnofv</refname>
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<refpurpose>Reply with an error to a D-Bus method call</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_reply_method_error</funcdef>
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<paramdef>sd_bus_message *<parameter>call</parameter></paramdef>
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<paramdef>const sd_bus_error *<parameter>e</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int sd_bus_reply_method_errorf</funcdef>
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<paramdef>sd_bus_message *<parameter>call</parameter></paramdef>
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<paramdef>const char *<parameter>name</parameter></paramdef>
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<paramdef>const char *<parameter>format</parameter></paramdef>
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<paramdef>...</paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int sd_bus_reply_method_errorfv</funcdef>
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<paramdef>sd_bus_message *<parameter>call</parameter></paramdef>
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<paramdef>const char *<parameter>name</parameter></paramdef>
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<paramdef>const char *<parameter>format</parameter></paramdef>
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<paramdef>va_list <parameter>ap</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int sd_bus_reply_method_errno</funcdef>
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<paramdef>sd_bus_message *<parameter>call</parameter></paramdef>
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<paramdef>int <parameter>error</parameter></paramdef>
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<paramdef>const sd_bus_error *<parameter>p</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int sd_bus_reply_method_errnof</funcdef>
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<paramdef>sd_bus_message *<parameter>call</parameter></paramdef>
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<paramdef>int <parameter>error</parameter></paramdef>
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<paramdef>const char *<parameter>format</parameter></paramdef>
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<paramdef>...</paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int sd_bus_reply_method_errnofv</funcdef>
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<paramdef>sd_bus_message *<parameter>call</parameter></paramdef>
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<paramdef>int <parameter>error</parameter></paramdef>
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<paramdef>const char *<parameter>format</parameter></paramdef>
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<paramdef>va_list <parameter>ap</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>The <function>sd_bus_reply_method_error()</function> function sends an error reply to the
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<parameter>call</parameter> message. The error structure <parameter>e</parameter> specifies the
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error to send, and is used as described in
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<citerefentry><refentrytitle>sd_bus_message_new_method_error</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
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If no reply is expected to <parameter>call</parameter>, this function succeeds without sending a
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reply.</para>
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<para>The <function>sd_bus_reply_method_errorf()</function> is to
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<function>sd_bus_reply_method_error()</function> what
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<function>sd_bus_message_new_method_errorf()</function> is to
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<function>sd_bus_message_new_method_error()</function>.</para>
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<para>The <function>sd_bus_reply_method_errno()</function> is to
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<function>sd_bus_reply_method_error()</function> what
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<function>sd_bus_message_new_method_errno()</function> is to
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<function>sd_bus_message_new_method_error()</function>.</para>
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<para>The <function>sd_bus_reply_method_errnof()</function> is to
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<function>sd_bus_reply_method_error()</function> what
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<function>sd_bus_message_new_method_errnof()</function> is to
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<function>sd_bus_message_new_method_error()</function>.</para>
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</refsect1>
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<refsect1>
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<title>Return Value</title>
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<para>This function returns a non-negative integer if the error reply was successfully sent or
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if <parameter>call</parameter> does not expect a reply. On failure, it returns a negative
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errno-style error code.</para>
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<refsect2>
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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 input parameter <parameter>call</parameter> is
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<constant>NULL</constant>.</para>
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<para>Message <parameter>call</parameter> is not a method call message.</para>
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<para>Message <parameter>call</parameter> is not attached to a bus.</para>
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<para>The error parameter <parameter>e</parameter> to
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<function>sd_bus_reply_method_error()</function> is not set, see
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<citerefentry><refentrytitle>sd_bus_error_is_set</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>-EPERM</constant></term>
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<listitem><para>Message <parameter>call</parameter> has been sealed.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>-ENOTCONN</constant></term>
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<listitem><para>The bus to which message <parameter>call</parameter> is attached is not
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connected.</para></listitem>
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</varlistentry>
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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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<para>In addition, any error returned by
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<citerefentry><refentrytitle>sd_bus_send</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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may be returned.</para>
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</refsect2>
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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_method_error</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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