"right" time zones - NTP
This is a discussion on "right" time zones - NTP ; i understand the timezones contain in /usr/share/zoneinfo/right respect
leap second, so if one were to use the utc in the "right" directory, the
time show on his system would be 23 seconds behind than the other utc
(/usr/share/zoneinfo/utc) whould show.
...
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"right" time zones
i understand the timezones contain in /usr/share/zoneinfo/right respect
leap second, so if one were to use the utc in the "right" directory, the
time show on his system would be 23 seconds behind than the other utc
(/usr/share/zoneinfo/utc) whould show.
my question is why would anyone wnat to use those right timezones? all the
clocks in the civilian real world from stock markets to street corners
synchronize to the non-peap time, are there applications that really need
to use the clock that respect the leap seconds? maybe atomic weapons or
space shuttles?
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Re: "right" time zones
In article ,
wrote:
>my question is why would anyone wnat to use those right timezones?
If you modified ntpd to call posix2time() and time2posix() in the
right places when computing offsets, and disabled ntp's leap-second
handling, your system would actually show the correct time around leap
seconds rather than the wrong time required by POSIX.
Since nobody does this, many vendors do not ship the leap-second
cognizant data files. We disabled this in FreeBSD more than a decade
ago.
-GAWollman
--
Garrett A. Wollman | The real tragedy of human existence is not that we are
wollman@csail.mit.edu| nasty by nature, but that a cruel structural asymmetry
Opinions not those | grants to rare events of meanness such power to shape
of MIT or CSAIL. | our history. - S.J. Gould, Ten Thousand Acts of Kindness
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Re: "right" time zones
lliks@labogcbs.net writes:
> i understand the timezones contain in /usr/share/zoneinfo/right respect
> leap second, so if one were to use the utc in the "right" directory, the
> time show on his system would be 23 seconds behind than the other utc
> (/usr/share/zoneinfo/utc) whould show.
Google for "bernstein tai" to see the history (and bitter arguments)
around having leap seconds "jump" the low-level timekeeping mechanism
vs. having leap seconds added later on during the display routine's
formatting of the "civil" time.
http://cr.yp.to/proto/utctai.html
-wolfgang
--
Wolfgang S. Rupprecht http://www.wsrcc.com/wolfgang/