Hi, Patrik,
On 3/27/2017 11:37 PM, Patrik Fältström wrote:
Joe,
I have read your I-D and like it! Let me start there :-)
What I think is not clear enough is the problem with POSIX, and it should be
more clear in some place, maybe section 6.1, that POSIX definition which is
in use in quite a number of systems do not handle leap second very well. Too
many do believe the time_t definitions include the number of seconds since
epoch when in reality it does not (as you note in the definitions).
I can make that more clear, but AFAICT POSIX time is *defined* as
seconds since the Unix epoch *not counting* leap seconds at all.
One could even question whether it is Continuous as two seconds will have the
same number since epoch around the addition of a leap second
It is Continuous by definition.
When UTC adds a leap second, nothing different happens to POSIX time.
...
There are some people that have suggested a change, for example
<http://www.cl.cam.ac.uk/~mgk25/time/c/> but I have not seen any movement.
Maybe you know more than me on this?
AFAICT, that's just attempting to redefine the <time.c> interface as
returning UTC rather than POSIX time.
Which works *IF* your machine has access to updated leap-second
information, e.g., via NTP.
Joe
On 27 Mar 2017, at 21:34, Joe Touch wrote:
Hi, all,
I've submitted the time frame discussion intended to resolve this issue,
which also recently arouse on another mailing list. Further discussion on
this draft will occur on the ART mailing list (art(_at_)ietf(_dot_)org).
Joe
-----------
A new version of I-D, draft-touch-time-01.txt
has been successfully submitted by Joe Touch and posted to the IETF
repository.
Name: draft-touch-time
Revision: 01
Title: Resolving Multiple Time Scales in the Internet
Document date: 2017-03-27
Group: Individual Submission
Pages: 17
URL: https://www.ietf.org/internet-drafts/draft-touch-time-01.txt
Status: https://datatracker.ietf.org/doc/draft-touch-time/
Htmlized: https://tools.ietf.org/html/draft-touch-time-01 Htmlized:
https://datatracker.ietf.org/doc/html/draft-touch-time-01 Diff:
https://www.ietf.org/rfcdiff?url2=draft-touch-time-01
Abstract:
Internet systems use a variety of time scales, which can complicate
time comparisons and calculations. This document explains these various
ways of indicating time and explains how they can be used together safely.
This document is intended as a companion to Internet time as discussed in
RFC 3339.