sd-radv: fix memleak

[thirdparty/systemd.git] / man / systemd-timedated.service.xml

diff --git a/man/systemd-timedated.service.xml b/man/systemd-timedated.service.xml
index fee860204d715e14c422dfef7233549b7d0bec4d..f981848cb204a3bfd09a065f2fc902a72bbc6c68 100644 (file)
--- a/man/systemd-timedated.service.xml
+++ b/man/systemd-timedated.service.xml
@@ -1,40 +1,13 @@
 <?xml version='1.0'?> <!--*-nxml-*-->
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-
-<!--
-  This file is part of systemd.
-
-  Copyright 2010 Lennart Poettering
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
-
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
--->
+<!-- SPDX-License-Identifier: LGPL-2.1+ -->
 
 <refentry id="systemd-timedated.service" conditional='ENABLE_TIMEDATED'>
 
   <refentryinfo>
     <title>systemd-timedated.service</title>
     <productname>systemd</productname>
-
-    <authorgroup>
-      <author>
-        <contrib>Developer</contrib>
-        <firstname>Lennart</firstname>
-        <surname>Poettering</surname>
-        <email>lennart@poettering.net</email>
-      </author>
-    </authorgroup>
   </refentryinfo>
 
   <refmeta>
@@ -58,7 +31,7 @@
 
     <para><filename>systemd-timedated</filename> is a system service
     that may be used as a mechanism to change the system clock and
-    timezone, as well as to enable/disable NTP time synchronization.
+    timezone, as well as to enable/disable network time synchronization.
     <filename>systemd-timedated</filename> is automatically activated
     on request and terminates itself when it is unused.</para>
 
@@ -72,13 +45,45 @@
     <filename>systemd-timedated</filename> provides.</para>
   </refsect1>
 
+  <refsect1>
+    <title>List of network time synchronization services</title>
+
+    <para><command>systemd-timesyncd</command> will look for files with a <literal>.list</literal> extension
+    in <filename>ntp-units.d/</filename> directories. Each file is parsed as a list of unit names, one per
+    line. Empty lines and lines with comments (<literal>#</literal>) are ignored.  Files are read from
+    <filename>/usr/lib/systemd/ntp-units.d/</filename> and the corresponding directories under
+    <filename>/etc/</filename>, <filename>/run/</filename>, <filename>/usr/local/lib/</filename>. Files in
+    <filename>/etc/</filename> override files with the same name in <filename>/run/</filename>,
+    <filename>/usr/local/lib/</filename>, and <filename>/usr/lib/</filename>. Files in
+    <filename>/run/</filename> override files with the same name under <filename>/usr/</filename>. Packages
+    should install their configuration files in <filename>/usr/lib/</filename> (distribution packages) or
+    <filename>/usr/local/lib/</filename> (local installs).</para>
+
+    <example>
+      <title><filename>ntp-units.d/</filename> entry for <command>systemd-timesyncd</command></title>
+      <programlisting># /usr/lib/systemd/ntp-units.d/80-systemd-timesync.list
+systemd-timesyncd.service
+</programlisting>
+    </example>
+
+    <para>If the environment variable <varname>$SYSTEMD_TIMEDATED_NTP_SERVICES</varname> is set,
+    <command>systemd-timesyncd</command> will parse the contents of that variable as a colon-separated list
+    of unit names. When set, this variable overrides the file-based list described above.</para>
+
+    <example>
+      <title>An override that specifies that <command>chronyd</command> should be used if available</title>
+      <programlisting>SYSTEMD_TIMEDATED_NTP_SERVICES=chronyd.service:systemd-timesyncd.service</programlisting>
+    </example>
+  </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>