77 lines
3.3 KiB
XML
77 lines
3.3 KiB
XML
<?xml version="1.0"?>
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<!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
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<refentry id="systemd-update-done.service">
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<refentryinfo>
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<title>systemd-update-done.service</title>
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<productname>systemd</productname>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd-update-done.service</refentrytitle>
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<manvolnum>8</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd-update-done.service</refname>
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<refname>systemd-update-done</refname>
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<refpurpose>Mark <filename>/etc/</filename> and <filename>/var/</filename> fully updated</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>systemd-update-done.service</filename></para>
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<para><filename>/usr/lib/systemd/systemd-update-done</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><filename>systemd-update-done.service</filename> is a
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service that is invoked as part of the first boot after the vendor
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operating system resources in <filename>/usr/</filename> have been
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updated. This is useful to implement offline updates of
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<filename>/usr/</filename> which might require updates to
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<filename>/etc/</filename> or <filename>/var/</filename> on the
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following boot.</para>
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<para><filename>systemd-update-done.service</filename> updates the
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file modification time (mtime) of the stamp files
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<filename>/etc/.updated</filename> and
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<filename>/var/.updated</filename> to the modification time of the
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<filename>/usr/</filename> directory, unless the stamp files are
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already newer.</para>
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<para>Services that shall run after offline upgrades of
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<filename>/usr/</filename> should order themselves before
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<filename>systemd-update-done.service</filename>, and use the
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<varname>ConditionNeedsUpdate=</varname> (see
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>)
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condition to make sure to run when <filename>/etc/</filename> or
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<filename>/var/</filename> are older than <filename>/usr/</filename>
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according to the modification times of the files described above.
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This requires that updates to <filename>/usr/</filename> are always
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followed by an update of the modification time of
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<filename>/usr/</filename>, for example by invoking
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<citerefentry project='man-pages'><refentrytitle>touch</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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on it.</para>
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<para>Note that if the <varname>systemd.condition-needs-update=</varname> kernel command line option is
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used it overrides the <varname>ConditionNeedsUpdate=</varname> unit condition checks. In that case
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<filename>systemd-update-done.service</filename> will not reset the condition state until a follow-up
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reboot where the kernel switch is not specified anymore.</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>touch</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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