[ntp:hackers] Re: NTP and leap-seconds

todd glassey todd.glassey at worldnet.att.net
Wed Jul 5 00:55:41 UTC 2006


Who officially maintains the Hourly Offsets for the Olsen Extended TZ
values?

Todd

----- Original Message ----- 
From: "David L. Mills" <mills at udel.edu>
To: <hackers at ntp.org>
Sent: Tuesday, July 04, 2006 5:31 PM
Subject: Re: [ntp:hackers] Re: NTP and leap-seconds


> Harlan,
>
> The only plaint I know about is a suggestion to use a majority test for
> leap indication designed to avoid terrorist servers that show leap in
> error at other times.
>
> Leap seconds don't have timezones. The actual leap is at midnight UTC;
> it will occur at other times in other timezones exactly as intended.
> There is no need to support the leap on any timezone other than UTC;
> just add the tz offset and be done with it.
>
> Dave
>
> Harlan Stenn wrote:
>
> > Recent Olson tz library implementations support either/both with(out)
> > leap second for timezones. ftp://elsie.nci.nih.gov/pub/ is where to
> > find it.
> >
> > There have been 5 bugs reported with the word "leap" in the summary; 3
> > are now closed. (508 and 539 are still open; 521, 525, and 543 are
> > closed).
> >
> > Somebody sent in a request to have ntpd behave differently (properly, in
> > his opinion, as I recall) if the base OS was already handling leap
> > seconds. I have not been able to find those emails, however. His
> > approach was to check to see if the OS was default-configured to use the
> > "right" timezone (see the Olson stuff above) and (do something) in that
> > case in the low-level time set/get code of ntpd. I think...
> >
> > H
>
>
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