blob: bbb916dc32c35a8749f144a926cda8217adb777c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
<?xml version='1.0'?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
SPDX-License-Identifier: LGPL-2.1+
-->
<refentry id="sd_bus_reply_method_error"
xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>sd_bus_reply_method_error</title>
<productname>systemd</productname>
</refentryinfo>
<refmeta>
<refentrytitle>sd_bus_reply_method_error</refentrytitle>
<manvolnum>3</manvolnum>
</refmeta>
<refnamediv>
<refname>sd_bus_reply_method_error</refname>
<refname>sd_bus_reply_method_errorf</refname>
<refname>sd_bus_reply_method_errno</refname>
<refname>sd_bus_reply_method_errnof</refname>
<refpurpose>Reply with an error to a method call</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
<funcprototype>
<funcdef>int sd_bus_reply_method_error</funcdef>
<paramdef>sd_bus_message *<parameter>call</parameter></paramdef>
<paramdef>const sd_bus_error *<parameter>e</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>int sd_bus_reply_method_errorf</funcdef>
<paramdef>sd_bus_message *<parameter>call</parameter></paramdef>
<paramdef>const char *<parameter>name</parameter></paramdef>
<paramdef>const char *<parameter>format</parameter></paramdef>
<paramdef>…</paramdef>
</funcprototype>
<funcprototype>
<funcdef>int sd_bus_reply_method_errno</funcdef>
<paramdef>sd_bus_message *<parameter>call</parameter></paramdef>
<paramdef>int <parameter>error</parameter></paramdef>
<paramdef>const sd_bus_error *<parameter>p</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>int sd_bus_reply_method_errnof</funcdef>
<paramdef>sd_bus_message *<parameter>call</parameter></paramdef>
<paramdef>int <parameter>error</parameter></paramdef>
<paramdef>const char *<parameter>format</parameter></paramdef>
<paramdef>…</paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>The <function>sd_bus_reply_method_error()</function> function sends an
error reply to the <parameter>call</parameter> message. The error structure
<parameter>e</parameter> specifies the error to send, and is used as described in
<citerefentry><refentrytitle>sd_bus_message_new_error</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
If no reply is expected to <parameter>call</parameter>, this function returns
success without sending reply.</para>
<para>The <function>sd_bus_reply_method_errorf()</function> is to
<function>sd_bus_reply_method_error()</function> what
<function>sd_bus_message_new_method_errorf()</function> is to
<function>sd_bus_message_new_method_error()</function>.</para>
<para>The <function>sd_bus_reply_method_errno()</function> is to
<function>sd_bus_reply_method_error()</function> what
<function>sd_bus_message_new_method_errno()</function> is to
<function>sd_bus_message_new_method_error()</function>.</para>
<para>The <function>sd_bus_reply_method_errnof()</function> is to
<function>sd_bus_reply_method_error()</function> what
<function>sd_bus_message_new_method_errnof()</function> is to
<function>sd_bus_message_new_method_error()</function>.</para>
</refsect1>
<refsect1>
<title>Return Value</title>
<para>These functions return 0 if the error reply was successfully sent or if
none was expected, and a negative errno-style error code otherwise.</para>
</refsect1>
<refsect1 id='errors'>
<title>Errors</title>
<para>Returned errors may indicate the following problems:</para>
<variablelist>
<varlistentry>
<term><constant>-EINVAL</constant></term>
<listitem><para>The call message <parameter>call</parameter> is
<constant>NULL</constant>.</para>
<para>Message <parameter>call</parameter> is not a method call message.
</para>
<para>Message <parameter>call</parameter> is not attached to a bus.</para>
<para>The error <parameter>error</parameter> parameter to
<function>sd_bus_reply_method_error</function> is not set, see
<citerefentry><refentrytitle>sd_bus_error_is_set</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><constant>-EPERM</constant></term>
<listitem><para>Message <parameter>call</parameter> has been sealed.
</para></listitem>
</varlistentry>
<varlistentry>
<term><constant>-ENOTCONN</constant></term>
<listitem><para>The bus to which message <parameter>call</parameter> is
attached is not connected.</para></listitem>
</varlistentry>
<varlistentry>
<term><constant>-ENOMEM</constant></term>
<listitem><para>Memory allocation failed.</para></listitem>
</varlistentry>
</variablelist>
<para>In addition, any error message returned by
<citerefentry><refentrytitle>sd_bus_send</refentrytitle><manvolnum>1</manvolnum></citerefentry>
may be returned.</para>
</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_message_new_method_error</refentrytitle><manvolnum>3</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
|
