man/systemd-update-done.service.xml

   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.
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   7   Copyright 2014 Lennart Poettering
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  20   along with systemd; If not, see <http://www.gnu.org/licenses/>.
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  22 <refentry id="systemd-update-done.service">
  23
  24         <refentryinfo>
  25                 <title>systemd-update-done.service</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-update-done.service</refentrytitle>
  40                 <manvolnum>8</manvolnum>
  41         </refmeta>
  42
  43         <refnamediv>
  44                 <refname>systemd-update-done.service</refname>
  45                 <refname>systemd-update-done</refname>
  46                 <refpurpose>Mark <filename>/etc</filename> and <filename>/var</filename> fully updated</refpurpose>
  47         </refnamediv>
  48
  49         <refsynopsisdiv>
  50                 <para><filename>systemd-update-done.service</filename></para>
  51                 <para><filename>/usr/lib/systemd/systemd-update-done</filename></para>
  52         </refsynopsisdiv>
  53
  54         <refsect1>
  55                 <title>Description</title>
  56
  57                 <para><filename>systemd-update-done.service</filename>
  58                 is a service that is invoked as part of the first boot
  59                 after the vendor operating system resources in
  60                 <filename>/usr</filename> have been updated. This is
  61                 useful to implement offline updates of
  62                 <filename>/usr</filename> which might requires updates
  63                 to <filename>/etc</filename> or
  64                 <filename>/var</filename> on the following boot.</para>
  65
  66                 <para><filename>systemd-update-done.service</filename>
  67                 updates the file modification time (mtime) of the
  68                 stamp files <filename>/etc/.updated</filename> and
  69                 <filename>/var/.updated</filename> to the modification
  70                 time of the <filename>/usr</filename> directory,
  71                 unless the stamp files are already newer.</para>
  72
  73                 <para>Services that shall run after offline upgrades
  74                 of <filename>/usr</filename> should order themselves
  75                 before
  76                 <filename>systemd-update-done.service</filename>, and
  77                 use the <varname>ConditionNeedsUpdate=</varname> (see
  78                 <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>)
  79                 condition to make sure to run when
  80                 <filename>/etc</filename> or <filename>/var</filename>
  81                 are older than <filename>/usr</filename> according to
  82                 the modification times of the files described
  83                 above. This requires that updates to
  84                 <filename>/usr</filename> are always followed by an
  85                 update of the modification time of
  86                 <filename>/usr</filename>, for example by invoking
  87                 <citerefentry project='man-pages'><refentrytitle>touch</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  88                 on it.</para>
  89
  90         </refsect1>
  91
  92         <refsect1>
  93                 <title>See Also</title>
  94                 <para>
  95                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
  96                         <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
  97                         <citerefentry project='man-pages'><refentrytitle>touch</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  98                 </para>
  99         </refsect1>
 100
 101 </refentry>