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1 | <?xml version='1.0'?> <!--*-nxml-*--> |
2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> | |
4 | ||
5 | <!-- | |
6 | SPDX-License-Identifier: LGPL-2.1+ | |
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7 | --> |
8 | ||
9 | <refentry id="systemd-time-wait-sync.service" conditional='ENABLE_TIMESYNCD'> | |
10 | ||
11 | <refentryinfo> | |
12 | <title>systemd-time-wait-sync.service</title> | |
13 | <productname>systemd</productname> | |
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14 | </refentryinfo> |
15 | ||
16 | <refmeta> | |
17 | <refentrytitle>systemd-time-wait-sync.service</refentrytitle> | |
18 | <manvolnum>8</manvolnum> | |
19 | </refmeta> | |
20 | ||
21 | <refnamediv> | |
22 | <refname>systemd-time-wait-sync.service</refname> | |
23 | <refname>systemd-time-wait-sync</refname> | |
24 | <refpurpose>Wait Until Kernel Time Synchronized</refpurpose> | |
25 | </refnamediv> | |
26 | ||
27 | <refsynopsisdiv> | |
28 | <para><filename>systemd-time-wait-sync.service</filename></para> | |
29 | <para><filename>/usr/lib/systemd/systemd-time-wait-sync</filename></para> | |
30 | </refsynopsisdiv> | |
31 | ||
32 | <refsect1> | |
33 | <title>Description</title> | |
34 | ||
35 | <para><filename>systemd-time-wait-sync</filename> is a system service that delays the start of units that depend on | |
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36 | <filename>time-sync.target</filename> until the system time has been synchronized with an accurate time source by |
37 | <filename>systemd-timesyncd.service</filename>.</para> | |
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39 | <para><filename>systemd-timesyncd.service</filename> notifies on successful synchronization. |
40 | <filename>systemd-time-wait-sync</filename> also tries to detect when the kernel marks the time as synchronized, | |
41 | but this detection is not reliable and is intended only as a fallback for other servies that can be used to | |
42 | synchronize time (e.g., ntpd, chronyd).</para> | |
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43 | |
44 | </refsect1> | |
45 | ||
46 | <refsect1> | |
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47 | <title>Files</title> |
48 | ||
49 | <variablelist> | |
50 | <varlistentry> | |
51 | <term><filename>/run/systemd/timesync/synchronized</filename></term> | |
52 | ||
53 | <listitem> | |
54 | <para>The presence of this file indicates to this service that the system clock has been synchronized.</para> | |
55 | </listitem> | |
56 | ||
57 | </varlistentry> | |
58 | </variablelist> | |
5c3376ef | 59 | |
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60 | </refsect1> |
61 | ||
62 | <refsect1> | |
63 | <title>See Also</title> | |
64 | <para> | |
65 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
66 | <citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>, | |
67 | <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
68 | </para> | |
69 | </refsect1> | |
70 | ||
71 | </refentry> |