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systemd/man/systemd-update-done.service.xml

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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
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<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 project='man-pages'><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 project='man-pages'><refentrytitle>touch</refentrytitle><manvolnum>1</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>