| <?xml version='1.0'?> <!--*-nxml-*--> |
| <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" |
| "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
| <!-- SPDX-License-Identifier: LGPL-2.1-or-later --> |
| |
| <refentry id="systemd-time-wait-sync.service" conditional='ENABLE_TIMESYNCD'> |
| |
| <refentryinfo> |
| <title>systemd-time-wait-sync.service</title> |
| <productname>systemd</productname> |
| </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 is 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 |
| are ordered after <filename>time-sync.target</filename> (see |
| <citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry> for |
| details) until the system time has been synchronized with an accurate remote reference time source by |
| <filename>systemd-timesyncd.service</filename>.</para> |
| |
| <para><filename>systemd-timesyncd.service</filename> notifies <filename>systemd-time-wait-sync</filename> |
| about successful synchronization. <filename>systemd-time-wait-sync</filename> also tries to detect when |
| the kernel marks the system clock as synchronized, but this detection is not reliable and is intended |
| only as a fallback for compatibility with alternative NTP services 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> |