1<?xml version="1.0"?>
2<!--*-nxml-*-->
3<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
4  "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
5<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
6<refentry id="systemd-update-done.service">
7
8  <refentryinfo>
9    <title>systemd-update-done.service</title>
10    <productname>systemd</productname>
11  </refentryinfo>
12
13  <refmeta>
14    <refentrytitle>systemd-update-done.service</refentrytitle>
15    <manvolnum>8</manvolnum>
16  </refmeta>
17
18  <refnamediv>
19    <refname>systemd-update-done.service</refname>
20    <refname>systemd-update-done</refname>
21    <refpurpose>Mark <filename>/etc/</filename> and <filename>/var/</filename> fully updated</refpurpose>
22  </refnamediv>
23
24  <refsynopsisdiv>
25    <para><filename>systemd-update-done.service</filename></para>
26    <para><filename>/usr/lib/systemd/systemd-update-done</filename></para>
27  </refsynopsisdiv>
28
29  <refsect1>
30    <title>Description</title>
31
32    <para><filename>systemd-update-done.service</filename> is a
33    service that is invoked as part of the first boot after the vendor
34    operating system resources in <filename>/usr/</filename> have been
35    updated. This is useful to implement offline updates of
36    <filename>/usr/</filename> which might require updates to
37    <filename>/etc/</filename> or <filename>/var/</filename> on the
38    following boot.</para>
39
40    <para><filename>systemd-update-done.service</filename> updates the
41    file modification time (mtime) of the stamp files
42    <filename>/etc/.updated</filename> and
43    <filename>/var/.updated</filename> to the modification time of the
44    <filename>/usr/</filename> directory, unless the stamp files are
45    already newer.</para>
46
47    <para>Services that shall run after offline upgrades of
48    <filename>/usr/</filename> should order themselves before
49    <filename>systemd-update-done.service</filename>, and use the
50    <varname>ConditionNeedsUpdate=</varname> (see
51    <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>)
52    condition to make sure to run when <filename>/etc/</filename> or
53    <filename>/var/</filename> are older than <filename>/usr/</filename>
54    according to the modification times of the files described above.
55    This requires that updates to <filename>/usr/</filename> are always
56    followed by an update of the modification time of
57    <filename>/usr/</filename>, for example by invoking
58    <citerefentry project='man-pages'><refentrytitle>touch</refentrytitle><manvolnum>1</manvolnum></citerefentry>
59    on it.</para>
60
61    <para>Note that if the <varname>systemd.condition-needs-update=</varname> kernel command line option is
62    used it overrides the <varname>ConditionNeedsUpdate=</varname> unit condition checks. In that case
63    <filename>systemd-update-done.service</filename> will not reset the condition state until a follow-up
64    reboot where the kernel switch is not specified anymore.</para>
65  </refsect1>
66
67  <refsect1>
68    <title>See Also</title>
69    <para>
70      <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
71      <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
72      <citerefentry project='man-pages'><refentrytitle>touch</refentrytitle><manvolnum>1</manvolnum></citerefentry>
73    </para>
74  </refsect1>
75
76</refentry>
77