Re: Predictable Internet Time

Nico Williams <nico@cryptonector.com> Wed, 19 April 2017 16:14 UTC

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Date: Wed, 19 Apr 2017 11:14:49 -0500
From: Nico Williams <nico@cryptonector.com>
To: Patrik =?iso-8859-1?B?RuRsdHN0cvZt?= <paf@frobbit.se>
Cc: Toerless Eckert <tte@cs.fau.de>, Phillip Hallam-Baker <phill@hallambaker.com>, IETF Discussion Mailing List <ietf@ietf.org>, Paul Eggert <eggert@cs.ucla.edu>
Subject: Re: Predictable Internet Time
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On Wed, Apr 19, 2017 at 07:18:29AM +0200, Patrik Fältström wrote:
> I want as potential fixes which I think are doable:
> 
> - an updated POSIX definition where the variable which holds the
> number of seconds since the epoch when converting back and forth to
> date actually will hold the number of seconds since the epoch.

So we should... brigade the Open Group?

> - a slot in the NTP protocol not used today include the number of leap
> seconds so people get to know that.
> 
> FWIW I am a person that is against smear. I think a clock must be able
> to give the correct time and that timestamps should be correct. Either
> in seconds (and fractions of seconds) since the epoch or in correct
> date and time UTC. Both are increasing all the time. And because of
> that smear should not have to happen.

+1

> That said, I am not against a BCP explaining the issues due to for
> example the broken POSIX specification (which makes it hard to "do the
> right thing" in software).

Sure.

Nico
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