man/systemd-update-done.service.xml

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  10   Copyright 2014 Lennart Poettering
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  25 <refentry id="systemd-update-done.service">
  26
  27   <refentryinfo>
  28     <title>systemd-update-done.service</title>
  29     <productname>systemd</productname>
  30
  31     <authorgroup>
  32       <author>
  33         <contrib>Developer</contrib>
  34         <firstname>Lennart</firstname>
  35         <surname>Poettering</surname>
  36         <email>lennart@poettering.net</email>
  37       </author>
  38     </authorgroup>
  39   </refentryinfo>
  40
  41   <refmeta>
  42     <refentrytitle>systemd-update-done.service</refentrytitle>
  43     <manvolnum>8</manvolnum>
  44   </refmeta>
  45
  46   <refnamediv>
  47     <refname>systemd-update-done.service</refname>
  48     <refname>systemd-update-done</refname>
  49     <refpurpose>Mark <filename>/etc</filename> and <filename>/var</filename> fully updated</refpurpose>
  50   </refnamediv>
  51
  52   <refsynopsisdiv>
  53     <para><filename>systemd-update-done.service</filename></para>
  54     <para><filename>&rootlibexecdir;/systemd-update-done</filename></para>
  55   </refsynopsisdiv>
  56
  57   <refsect1>
  58     <title>Description</title>
  59
  60     <para><filename>systemd-update-done.service</filename> is a
  61     service that is invoked as part of the first boot after the vendor
  62     operating system resources in <filename>/usr</filename> have been
  63     updated. This is useful to implement offline updates of
  64     <filename>/usr</filename> which might requires updates to
  65     <filename>/etc</filename> or <filename>/var</filename> on the
  66     following boot.</para>
  67
  68     <para><filename>systemd-update-done.service</filename> updates the
  69     file modification time (mtime) of the stamp files
  70     <filename>/etc/.updated</filename> and
  71     <filename>/var/.updated</filename> to the modification time of the
  72     <filename>/usr</filename> directory, unless the stamp files are
  73     already newer.</para>
  74
  75     <para>Services that shall run after offline upgrades of
  76     <filename>/usr</filename> should order themselves before
  77     <filename>systemd-update-done.service</filename>, and use the
  78     <varname>ConditionNeedsUpdate=</varname> (see
  79     <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>)
  80     condition to make sure to run when <filename>/etc</filename> or
  81     <filename>/var</filename> are older than <filename>/usr</filename>
  82     according to the modification times of the files described above.
  83     This requires that updates to <filename>/usr</filename> are always
  84     followed by an update of the modification time of
  85     <filename>/usr</filename>, for example by invoking
  86     <citerefentry project='man-pages'><refentrytitle>touch</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  87     on it.</para>
  88
  89   </refsect1>
  90
  91   <refsect1>
  92     <title>See Also</title>
  93     <para>
  94       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
  95       <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
  96       <citerefentry project='man-pages'><refentrytitle>touch</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  97     </para>
  98   </refsect1>
  99
 100 </refentry>