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1 | <?xml version='1.0'?> <!--*-nxml-*--> |
2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
12b42c76 | 3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
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4 | |
5 | <!-- | |
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6 | SPDX-License-Identifier: LGPL-2.1+ |
7 | ||
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8 | This file is part of systemd. |
9 | ||
10 | Copyright 2012 Lennart Poettering | |
11 | ||
12 | systemd is free software; you can redistribute it and/or modify it | |
13 | under the terms of the GNU Lesser General Public License as published by | |
14 | the Free Software Foundation; either version 2.1 of the License, or | |
15 | (at your option) any later version. | |
16 | ||
17 | systemd is distributed in the hope that it will be useful, but | |
18 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | Lesser General Public License for more details. | |
21 | ||
22 | You should have received a copy of the GNU Lesser General Public License | |
23 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
24 | --> | |
25 | ||
26 | <refentry id="sd_journal_get_catalog"> | |
27 | ||
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28 | <refentryinfo> |
29 | <title>sd_journal_get_catalog</title> | |
30 | <productname>systemd</productname> | |
31 | ||
32 | <authorgroup> | |
33 | <author> | |
34 | <contrib>Developer</contrib> | |
35 | <firstname>Lennart</firstname> | |
36 | <surname>Poettering</surname> | |
37 | <email>lennart@poettering.net</email> | |
38 | </author> | |
39 | </authorgroup> | |
40 | </refentryinfo> | |
41 | ||
42 | <refmeta> | |
43 | <refentrytitle>sd_journal_get_catalog</refentrytitle> | |
44 | <manvolnum>3</manvolnum> | |
45 | </refmeta> | |
46 | ||
47 | <refnamediv> | |
48 | <refname>sd_journal_get_catalog</refname> | |
49 | <refname>sd_journal_get_catalog_for_message_id</refname> | |
50 | <refpurpose>Retrieve message catalog entry</refpurpose> | |
51 | </refnamediv> | |
52 | ||
53 | <refsynopsisdiv> | |
54 | <funcsynopsis> | |
55 | <funcsynopsisinfo>#include <systemd/sd-journal.h></funcsynopsisinfo> | |
56 | ||
57 | <funcprototype> | |
58 | <funcdef>int <function>sd_journal_get_catalog</function></funcdef> | |
59 | <paramdef>sd_journal *<parameter>j</parameter></paramdef> | |
60 | <paramdef>char **<parameter>ret</parameter></paramdef> | |
61 | </funcprototype> | |
62 | ||
63 | <funcprototype> | |
64 | <funcdef>int <function>sd_journal_get_catalog_for_message_id</function></funcdef> | |
65 | <paramdef>sd_id128_t <parameter>id</parameter></paramdef> | |
66 | <paramdef>char **<parameter>ret</parameter></paramdef> | |
67 | </funcprototype> | |
68 | ||
69 | ||
70 | </funcsynopsis> | |
71 | </refsynopsisdiv> | |
72 | ||
73 | <refsect1> | |
74 | <title>Description</title> | |
75 | ||
76 | <para><function>sd_journal_get_catalog()</function> retrieves a | |
77 | message catalog entry for the current journal entry. This will | |
78 | look up an entry in the message catalog by using the | |
79 | <literal>MESSAGE_ID=</literal> field of the current journal entry. | |
80 | Before returning the entry all journal field names in the catalog | |
81 | entry text enclosed in "@" will be replaced by the respective | |
82 | field values of the current entry. If a field name referenced in | |
83 | the message catalog entry does not exist, in the current journal | |
84 | entry, the "@" will be removed, but the field name otherwise left | |
85 | untouched.</para> | |
86 | ||
87 | <para><function>sd_journal_get_catalog_for_message_id()</function> | |
88 | works similar to <function>sd_journal_get_catalog()</function> but | |
89 | the entry is looked up by the specified message ID (no open | |
90 | journal context is necessary for this), and no field substitution | |
91 | is performed.</para> | |
92 | ||
93 | <para>For more information about the journal message catalog | |
94 | please refer to the <ulink | |
28a0ad81 | 95 | url="https://www.freedesktop.org/wiki/Software/systemd/catalog">Journal |
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96 | Message Catalogs</ulink> documentation page.</para> |
97 | </refsect1> | |
98 | ||
99 | <refsect1> | |
100 | <title>Return Value</title> | |
101 | ||
102 | <para><function>sd_journal_get_catalog()</function> and | |
103 | <function>sd_journal_get_catalog_for_message_id()</function> | |
104 | return 0 on success or a negative errno-style error code. If no | |
105 | matching message catalog entry is found, -ENOENT is | |
106 | returned.</para> | |
107 | ||
108 | <para>On successful return, <parameter>ret</parameter> points to a | |
109 | new string, which must be freed with | |
110 | <citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>. | |
111 | </para> | |
112 | </refsect1> | |
113 | ||
114 | <refsect1> | |
115 | <title>Notes</title> | |
116 | ||
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117 | <para>Function <function>sd_journal_get_catalog()</function> is thread-agnostic and only a |
118 | single thread may operate on a given <structname>sd_journal</structname> object. Function | |
77d3bb12 | 119 | <function>sd_journal_get_catalog_for_message_id()</function> is thread-safe.</para> |
a8d46a16 | 120 | |
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121 | <para>The <function>sd_journal_get_catalog()</function> and |
122 | <function>sd_journal_get_catalog_for_message_id()</function> | |
123 | interfaces are available as a shared library, which can be | |
124 | compiled and linked to with the | |
125 | <constant>libsystemd</constant> <citerefentry project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
126 | file.</para> | |
127 | </refsect1> | |
128 | ||
129 | <refsect1> | |
130 | <title>See Also</title> | |
131 | ||
132 | <para> | |
133 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
134 | <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>, | |
135 | <citerefentry><refentrytitle>sd-journal</refentrytitle><manvolnum>3</manvolnum></citerefentry>, | |
136 | <citerefentry><refentrytitle>sd_journal_open</refentrytitle><manvolnum>3</manvolnum></citerefentry>, | |
137 | <citerefentry><refentrytitle>sd_journal_next</refentrytitle><manvolnum>3</manvolnum></citerefentry>, | |
138 | <citerefentry><refentrytitle>sd_journal_get_data</refentrytitle><manvolnum>3</manvolnum></citerefentry>, | |
3ba3a79d | 139 | <citerefentry project='man-pages'><refentrytitle>malloc</refentrytitle><manvolnum>3</manvolnum></citerefentry> |
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140 | </para> |
141 | </refsect1> | |
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142 | |
143 | </refentry> |