X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=man%2Fsystemd.unit.xml;h=960fb90dbd1d8080bbb97958327b0574b5270300;hb=02ea24ca2a0aac854c4e9e7d712f6464c8b29e4a;hp=b337bb42bcfc593d9b05f0fce3097b9737982ed5;hpb=d54c4993699f4fa5feece43715aac3564c4dada6;p=elogind.git

diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml
index b337bb42b..960fb90db 100644
--- a/man/systemd.unit.xml
+++ b/man/systemd.unit.xml
@@ -900,6 +900,7 @@
                                 <term><varname>ConditionSecurity=</varname></term>
                                 <term><varname>ConditionCapability=</varname></term>
                                 <term><varname>ConditionACPower=</varname></term>
+                                <term><varname>ConditionNeedsUpdate=</varname></term>
                                 <term><varname>ConditionPathExists=</varname></term>
                                 <term><varname>ConditionPathExistsGlob=</varname></term>
                                 <term><varname>ConditionPathIsDirectory=</varname></term>
@@ -1068,6 +1069,33 @@
                                 all AC connectors are disconnected
                                 from a power source.</para>
 
+                                <para><varname>ConditionNeedsUpdate=</varname>
+                                takes one of <filename>/var</filename>
+                                or <filename>/etc</filename> as
+                                argument, possibly prefixed with a
+                                <literal>!</literal> (for inverting
+                                the condition). This condition may be
+                                used to conditionalize units on
+                                whether the specified directory
+                                requires an update because
+                                <filename>/usr</filename>'s
+                                modification time is newer than the
+                                stamp file
+                                <filename>.updated</filename> in the
+                                specified directory. This is useful to
+                                implement offline updates of the
+                                vendor operating system resources in
+                                <filename>/usr</filename> that require
+                                updating of <filename>/etc</filename>
+                                or <filename>/var</filename> on the
+                                next following boot. Units making use
+                                of this condition should order
+                                themselves before
+                                <citerefentry><refentrytitle>systemd-update-done.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+                                to make sure they run before the stamp
+                                files's modification time gets reset
+                                indicating a completed update.</para>
+
                                 <para>With
                                 <varname>ConditionPathExists=</varname>
                                 a file existence condition is
@@ -1181,7 +1209,7 @@
                                 useful for implementation of generator
                                 tools that convert configuration from
                                 an external configuration file format
-                                into native unit files. Thus
+                                into native unit files. This
                                 functionality should not be used in
                                 normal units.</para></listitem>
                         </varlistentry>
@@ -1290,7 +1318,7 @@
                         <varlistentry>
                                 <term><varname>DefaultInstance=</varname></term>
 
-                                <listitem><para>In template unit files
+                                <listitem><para>In template unit files,
                                 this specifies for which instance the
                                 unit shall be enabled if the template
                                 is enabled without any explicitly set