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+<?xml version="1.0"?>
+<!--*-nxml-*-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+<!--
+ This file is part of systemd.
+
+ Copyright 2014 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+-->
+<refentry id="systemd-update-done.service">
+
+ <refentryinfo>
+ <title>systemd-update-done.service</title>
+ <productname>systemd</productname>
+
+ <authorgroup>
+ <author>
+ <contrib>Developer</contrib>
+ <firstname>Lennart</firstname>
+ <surname>Poettering</surname>
+ <email>lennart@poettering.net</email>
+ </author>
+ </authorgroup>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>systemd-update-done.service</refentrytitle>
+ <manvolnum>8</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>systemd-update-done.service</refname>
+ <refname>systemd-update-done</refname>
+ <refpurpose>Mark <filename>/etc</filename> and <filename>/var</filename> fully updated</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <para><filename>systemd-update-done.service</filename></para>
+ <para><filename>/usr/lib/systemd/systemd-update-done</filename></para>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><filename>systemd-update-done.service</filename>
+ is a service that is invoked as part of the first boot
+ after the vendor operating system resources in
+ <filename>/usr</filename> have been updated. This is
+ useful to implement offline updates of
+ <filename>/usr</filename> which might requires updates
+ to <filename>/etc</filename> or
+ <filename>/var</filename> on the following boot.</para>
+
+ <para><filename>systemd-update-done.service</filename>
+ updates the file modification time (mtime) of the
+ stamp files <filename>/etc/.updated</filename> and
+ <filename>/var/.updated</filename> to the modification
+ time of the <filename>/usr</filename> directory,
+ unless the stamp files are already newer.</para>
+
+ <para>Services that shall run after offline upgrades
+ of <filename>/usr</filename> should order themselves
+ before
+ <filename>systemd-update-done.service</filename>, and
+ use the <varname>ConditionNeedsUpdate=</varname> (see
+ <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>)
+ condition to make sure to run when
+ <filename>/etc</filename> or <filename>/var</filename>
+ are older than <filename>/usr</filename> according to
+ the modification times of the files described
+ above. This requires that updates to
+ <filename>/usr</filename> are always followed by an
+ update of the modification time of
+ <filename>/usr</filename>, for example by invoking
+ <citerefentry><refentrytitle>touch</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ on it.</para>
+
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>touch</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>