man: update timedatectl and systemd-timedated

1 files changed, 22 insertions, 1 deletions

diff --git a/man/systemd-timedated.service.xml b/man/systemd-timedated.service.xml
index c8d74ddef2..9a37d89a40 100644
--- a/man/systemd-timedated.service.xml
+++ b/man/systemd-timedated.service.xml
@@ -62,12 +62,33 @@
   </refsect1>
 
   <refsect1>
+    <title>Environment</title>
+
+    <variablelist class='environment-variables'>
+      <varlistentry>
+        <term><varname>$SYSTEMD_TIMEDATED_NTP_SERVICES</varname></term>
+
+        <listitem><para>Colon-separated list of unit names of NTP client services.
+        If not set, then
+        <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+        is used. See the entries of NTP related commands of
+        <citerefentry><refentrytitle>timedatectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+        for details about this.</para>
+
+        <para>Example:
+        <programlisting>SYSTEMD_TIMEDATED_NTP_SERVICES=ntpd.service:chronyd.service:systemd-timesyncd.service</programlisting>
+        </para></listitem>
+      </varlistentry>
+    </variablelist>
+  </refsect1>
+  <refsect1>
     <title>See Also</title>
     <para>
       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>timedatectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
-      <citerefentry project='man-pages'><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+      <citerefentry project='man-pages'><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>systemd-timesyncd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
     </para>
   </refsect1>