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1 <?xml version="1.0"?>
2 <!--*-nxml-*-->
3 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
4 <!--
5   This file is part of systemd.
6
7   Copyright 2012 Lennart Poettering
8
9   systemd is free software; you can redistribute it and/or modify it
10   under the terms of the GNU Lesser General Public License as published by
11   the Free Software Foundation; either version 2.1 of the License, or
12   (at your option) any later version.
13
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16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17   Lesser General Public License for more details.
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19   You should have received a copy of the GNU Lesser General Public License
20   along with systemd; If not, see <http://www.gnu.org/licenses/>.
21 -->
22 <refentry id="systemd-system-update-generator">
23
24         <refentryinfo>
25                 <title>systemd-system-update-generator</title>
26                 <productname>systemd</productname>
27
28                 <authorgroup>
29                         <author>
30                                 <contrib>Developer</contrib>
31                                 <firstname>Lennart</firstname>
32                                 <surname>Poettering</surname>
33                                 <email>lennart@poettering.net</email>
34                         </author>
35                 </authorgroup>
36         </refentryinfo>
37
38         <refmeta>
39                 <refentrytitle>systemd-system-update-generator</refentrytitle>
40                 <manvolnum>8</manvolnum>
41         </refmeta>
42
43         <refnamediv>
44                 <refname>systemd-system-update-generator</refname>
45                 <refpurpose>Generator for redirecting boot to offline update mode</refpurpose>
46         </refnamediv>
47
48         <refsynopsisdiv>
49                 <para><filename>/usr/lib/systemd/system-generators/systemd-system-update-generator</filename></para>
50         </refsynopsisdiv>
51
52         <refsect1>
53                 <title>Description</title>
54
55                 <para><filename>systemd-system-update-generator</filename>
56                 is a generator that automatically redirects the boot
57                 process to <filename>system-update.target</filename>
58                 if <filename>/system-update</filename> exists. This is
59                 required to implement the logic explained in the
60                 <ulink
61                 url="http://freedesktop.org/wiki/Software/systemd/SystemUpdates">System
62                 Updates Specification</ulink>.
63                 </para>
64
65                 <para><filename>systemd-system-update-generator</filename>
66                 implements the <ulink
67                 url="http://www.freedesktop.org/wiki/Software/systemd/Generators">generator
68                 specification</ulink>.</para>
69         </refsect1>
70
71         <refsect1>
72                 <title>See Also</title>
73                 <para>
74                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
75                         <citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>
76                 </para>
77         </refsect1>
78
79 </refentry>