mirror of
https://github.com/systemd/systemd-stable.git
synced 2024-12-24 21:34:08 +03:00
2dd79846dd
Systems that have an accurate real-time clock may have an initial unsynchronized time that is close enough to the synchronized time that the final adjustment doesn't trigger a waking "clock set" event. Have timesyncd touch a file in its runtime directory as a secondary signal for synchronization. Continue to support the timerfd-based trigger as a sufficient condition when the watchfile is not present. Closes issue #8683
85 lines
2.7 KiB
XML
85 lines
2.7 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
|
|
<!--
|
|
SPDX-License-Identifier: LGPL-2.1+
|
|
|
|
This file is part of systemd.
|
|
|
|
Copyright 2018 Peter A. Bigot
|
|
-->
|
|
|
|
<refentry id="systemd-time-wait-sync.service" conditional='ENABLE_TIMESYNCD'>
|
|
|
|
<refentryinfo>
|
|
<title>systemd-time-wait-sync.service</title>
|
|
<productname>systemd</productname>
|
|
|
|
<authorgroup>
|
|
<author>
|
|
<contrib>Developer</contrib>
|
|
<firstname>Peter</firstname>
|
|
<surname>Bigot</surname>
|
|
<email>pab@pabigot.com</email>
|
|
</author>
|
|
</authorgroup>
|
|
</refentryinfo>
|
|
|
|
<refmeta>
|
|
<refentrytitle>systemd-time-wait-sync.service</refentrytitle>
|
|
<manvolnum>8</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>systemd-time-wait-sync.service</refname>
|
|
<refname>systemd-time-wait-sync</refname>
|
|
<refpurpose>Wait Until Kernel Time Synchronized</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<para><filename>systemd-time-wait-sync.service</filename></para>
|
|
<para><filename>/usr/lib/systemd/systemd-time-wait-sync</filename></para>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para><filename>systemd-time-wait-sync</filename> is a system service that delays the start of units that depend on
|
|
<filename>time-sync.target</filename> until the system time has been synchronized with an accurate time source by
|
|
<filename>systemd-timesyncd.service</filename>.</para>
|
|
|
|
<para><filename>systemd-timesyncd.service</filename> notifies on successful synchronization.
|
|
<filename>systemd-time-wait-sync</filename> also tries to detect when the kernel marks the time as synchronized,
|
|
but this detection is not reliable and is intended only as a fallback for other servies that can be used to
|
|
synchronize time (e.g., ntpd, chronyd).</para>
|
|
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Files</title>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><filename>/run/systemd/timesync/synchronized</filename></term>
|
|
|
|
<listitem>
|
|
<para>The presence of this file indicates to this service that the system clock has been synchronized.</para>
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
</variablelist>
|
|
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|