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1 | <?xml version='1.0'?> | |
2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" | |
3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> | |
4 | <!-- SPDX-License-Identifier: LGPL-2.1+ --> | |
5 | ||
6 | <refentry id="sd_bus_set_address" | |
7 | xmlns:xi="http://www.w3.org/2001/XInclude"> | |
8 | ||
9 | <refentryinfo> | |
10 | <title>sd_bus_set_address</title> | |
11 | <productname>systemd</productname> | |
12 | </refentryinfo> | |
13 | ||
14 | <refmeta> | |
15 | <refentrytitle>sd_bus_set_address</refentrytitle> | |
16 | <manvolnum>3</manvolnum> | |
17 | </refmeta> | |
18 | ||
19 | <refnamediv> | |
20 | <refname>sd_bus_set_address</refname> | |
21 | <refname>sd_bus_get_address</refname> | |
22 | <refname>sd_bus_set_exec</refname> | |
23 | ||
24 | <refpurpose>Set or query the address of the bus connection</refpurpose> | |
25 | </refnamediv> | |
26 | ||
27 | <refsynopsisdiv> | |
28 | <funcsynopsis> | |
29 | <funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo> | |
30 | ||
31 | <funcprototype> | |
32 | <funcdef>int <function>sd_bus_set_address</function></funcdef> | |
33 | <paramdef>sd_bus *<parameter>bus</parameter></paramdef> | |
34 | <paramdef>const char *<parameter>address</parameter></paramdef> | |
35 | </funcprototype> | |
36 | ||
37 | <funcprototype> | |
38 | <funcdef>int <function>sd_bus_get_address</function></funcdef> | |
39 | <paramdef>sd_bus *<parameter>bus</parameter></paramdef> | |
40 | <paramdef>const char **<parameter>address</parameter></paramdef> | |
41 | </funcprototype> | |
42 | ||
43 | <funcprototype> | |
44 | <funcdef>int <function>sd_bus_set_exec</function></funcdef> | |
45 | <paramdef>sd_bus *<parameter>bus</parameter></paramdef> | |
46 | <paramdef>const char *<parameter>path</parameter></paramdef> | |
47 | <paramdef>char *const *<parameter>argv</parameter></paramdef> | |
48 | </funcprototype> | |
49 | </funcsynopsis> | |
50 | </refsynopsisdiv> | |
51 | ||
52 | <refsect1> | |
53 | <title>Description</title> | |
54 | ||
55 | <para><function>sd_bus_set_address()</function> configures a list of addresses of bus brokers to try to | |
56 | connect to from a subsequent | |
57 | <citerefentry><refentrytitle>sd_bus_start</refentrytitle><manvolnum>3</manvolnum></citerefentry> call. | |
58 | The argument is a <literal>;</literal>-separated list of addresses to try. Each item must be one of the | |
59 | following: | |
60 | </para> | |
61 | ||
62 | <itemizedlist> | |
63 | <listitem> | |
64 | <para>A unix socket address specified as | |
65 | <literal>unix:guid=<replaceable>guid</replaceable>,path=<replaceable>path</replaceable></literal> or | |
66 | <literal>unix:guid=<replaceable>guid</replaceable>,abstract=<replaceable>path</replaceable></literal>. | |
67 | Exactly one of the <varname>path=</varname> and <varname>abstract=</varname> keys must be present, | |
68 | while <varname>guid=</varname> is optional.</para> | |
69 | </listitem> | |
70 | ||
71 | <listitem> | |
72 | <para>A TCP socket address specified as | |
73 | <literal>tcp:[guid=<replaceable>guid</replaceable>,][host=<replaceable>host</replaceable>][,port=<replaceable>port</replaceable>][,family=<replaceable>family</replaceable>]</literal>. | |
74 | One or both of the <varname>host=</varname> and <varname>port=</varname> keys must be present, while | |
75 | the rest is optional. <replaceable>family</replaceable> may be either <option>ipv4</option> or | |
76 | <option>ipv6</option>.</para> | |
77 | </listitem> | |
78 | ||
79 | <listitem> | |
80 | <para>An executable to spawn specified as | |
81 | <literal>unixexec:guid=<replaceable>guid</replaceable>,path=<replaceable>path</replaceable>,argv1=<replaceable>argument</replaceable>,argv2=<replaceable>argument</replaceable>,...</literal>. | |
82 | The <varname>path=</varname> key must be present, while <varname>guid=</varname> is optional.</para> | |
83 | </listitem> | |
84 | ||
85 | <listitem> | |
86 | <para>A machine (container) to connect to specified as | |
87 | <literal>x-machine-unix:guid=<replaceable>guid</replaceable>,machine=<replaceable>machine</replaceable>,pid=<replaceable>pid</replaceable></literal>. | |
88 | Exactly one of the <varname>machine=</varname> and <varname>pid=</varname> keys must be present, | |
89 | while <varname>guid=</varname> is optional. <parameter>machine</parameter> is the name of a local | |
90 | container. See | |
91 | <citerefentry><refentrytitle>machinectl</refentrytitle><manvolnum>1</manvolnum></citerefentry> for | |
92 | more information about the "machine" concept. <literal>machine=.host</literal> may be used to specify | |
93 | the host machine. A connection to the standard system bus socket inside of the specified machine will | |
94 | be created.</para> | |
95 | </listitem> | |
96 | </itemizedlist> | |
97 | ||
98 | <para>In all cases, parameter <parameter>guid</parameter> is an identifier of the remote peer, in the | |
99 | syntax accepted by | |
100 | <citerefentry><refentrytitle>sd_id128_from_string</refentrytitle><manvolnum>3</manvolnum></citerefentry>. | |
101 | If specified, the identifier returned by the peer after the connection is established will be checked and | |
102 | the connection will be rejected in case of a mismatch.</para> | |
103 | ||
104 | <para>Note that the addresses passed to <function>sd_bus_set_address()</function> may not be verified | |
105 | immediately. If they are invalid, an error may be returned e.g. from a subsequent call to | |
106 | <citerefentry><refentrytitle>sd_bus_start</refentrytitle><manvolnum>3</manvolnum></citerefentry>. | |
107 | </para> | |
108 | ||
109 | <para><function>sd_bus_get_address()</function> returns any previously set addresses. In addition to | |
110 | being explicitly set by <function>sd_bus_set_address()</function>, the address will also be set | |
111 | automatically by | |
112 | <citerefentry><refentrytitle>sd_bus_open</refentrytitle><manvolnum>3</manvolnum></citerefentry> and | |
113 | similar calls, based on environment variables or built-in defaults.</para> | |
114 | ||
115 | <para><function>sd_bus_set_exec</function> is a shorthand function for setting a | |
116 | <literal>unixexec</literal> address that spawns the given executable with the given arguments. | |
117 | If <parameter>argv</parameter> is <constant>NULL</constant>, the given executable is spawned | |
118 | without any extra arguments.</para> | |
119 | </refsect1> | |
120 | ||
121 | <refsect1> | |
122 | <title>Return Value</title> | |
123 | ||
124 | <para>On success, these functions return a non-negative integer. On failure, they return a negative | |
125 | errno-style error code.</para> | |
126 | ||
127 | <refsect2> | |
128 | <title>Errors</title> | |
129 | ||
130 | <para>Returned errors may indicate the following problems:</para> | |
131 | ||
132 | <variablelist> | |
133 | <varlistentry> | |
134 | <term><constant>-EINVAL</constant></term> | |
135 | ||
136 | <listitem><para>The input parameters <parameter>bus</parameter> or <parameter>address</parameter> are <constant>NULL</constant>. | |
137 | </para></listitem> | |
138 | </varlistentry> | |
139 | ||
140 | <varlistentry> | |
141 | <term><constant>-ENOPKG</constant></term> | |
142 | ||
143 | <listitem><para>The bus object <parameter>bus</parameter> could not be resolved.</para> | |
144 | </listitem> | |
145 | </varlistentry> | |
146 | ||
147 | <varlistentry> | |
148 | <term><constant>-EPERM</constant></term> | |
149 | ||
150 | <listitem><para>The input parameter <parameter>bus</parameter> is in a wrong state | |
151 | (<function>sd_bus_set_address()</function> may only be called once on a newly-created bus object).</para> | |
152 | </listitem> | |
153 | </varlistentry> | |
154 | ||
155 | <varlistentry> | |
156 | <term><constant>-ECHILD</constant></term> | |
157 | ||
158 | <listitem><para>The bus object <parameter>bus</parameter> was created in a different | |
159 | process.</para> | |
160 | </listitem> | |
161 | </varlistentry> | |
162 | ||
163 | <varlistentry> | |
164 | <term><constant>-ENODATA</constant></term> | |
165 | ||
166 | <listitem><para>The bus object <parameter>bus</parameter> has no address configured.</para> | |
167 | </listitem> | |
168 | </varlistentry> | |
169 | </variablelist> | |
170 | </refsect2> | |
171 | </refsect1> | |
172 | ||
173 | <xi:include href="libsystemd-pkgconfig.xml" /> | |
174 | ||
175 | <refsect1> | |
176 | <title>See Also</title> | |
177 | ||
178 | <para> | |
179 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
180 | <citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>, | |
181 | <citerefentry><refentrytitle>sd_bus_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>, | |
182 | <citerefentry><refentrytitle>sd_bus_start</refentrytitle><manvolnum>3</manvolnum></citerefentry>, | |
183 | <citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
184 | <citerefentry><refentrytitle>machinectl</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
185 | </para> | |
186 | </refsect1> | |
187 | ||
188 | </refentry> |