晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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timedatex
=========

timedatex is a D-Bus service that implements the org.freedesktop.timedate1
interface. It can be used to read and set the system clock, the real-time clock
(RTC), the system timezone, and enable or disable an NTP client installed on
the system. It is a replacement for the systemd-timedated service.

The system clock is read and set with microsecond resolution, the precision is
limited mostly by D-Bus latency. When setting the clock to an absolute time, a
correction is applied for the time spent in the polkit authorization check. The
clock can be also adjusted precisely by an offset.

The RTC is read with a resolution of one second. The hwclock program is used to
set the RTC with a high precision, update the estimated drift, and change the
UTC/LOCAL setting.

The system timezone is set by creating symlink /etc/localtime to a file in the
/usr/share/zoneinfo directory.

NTP units that should be controlled by timedatex need to be listed in text
files in /etc/systemd/ntp-units.d and /usr/lib/systemd/ntp-units.d directories.
The first valid unit from the files sorted by name can be enabled/disabled and
started/stopped. Other NTP units will be disabled and stopped.

Requirements:

- glib development files
- libselinux development files (optional)
- polkit
- systemd
- hwclock from util-linux

Installation:

$ make
# make install prefix=/usr
# systemctl daemon-reload
# systemctl enable timedatex.service
# systemctl mask systemd-timedated.service

systemd should now start timedatex instead of systemd-timedated for the
org.freedesktop.timedate1 bus name when a client tries to connect to it.


Copyright (C) 2014  Miroslav Lichvar <mlichvar@redhat.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

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