FW: zic leapseconds bug

[Olson, Arthur David (NIH/NCI) [E]]

David Robinson is not on the time zone mailing list; direct replies
appropriately.

				--ado 

-----Original Message-----
From: David Robinson [mailto:drtr at apache.org] 
Sent: Tuesday, June 13, 2006 4:04 PM
To: Olson, Arthur David (NIH/NCI) [E]
Cc: tz at lecserver.nci.nih.gov; bww at acm.org; eggert at twinsun.com
Subject: RE: zic leapseconds bug

I think I chose an example that was rather confusing - mixing the
timezone and leapsecond transitions; apologies for that.  Try this
instead.

(start with /usr/local/etc/zoneinfo having the leapsecond version of the
tzfiles)

% cat <<FOO > xlondon
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/London-Test	 0:00	EU	GMT/BST

Rule	EU	1995	only	-	May	21	2:00s	1:00
BST
Rule	EU	1995	only	-	Oct	 1	2:00s	0
GMT
# Note this line; 2 seconds after midnigt
Rule	EU	1996	only	-	Jan	1	0:00:02z
1:00	BST
Rule	EU	1996	only	-	Jan	2	2:00z	0
GMT
FOO
% zic -L leapseconds -y yearistype.sh -d /usr/local/etc/zoneinfo zlondon

% ./zdump.exe -v Europe/London-Test | fgrep 1996 Europe/London-Test  Mon
Jan  1 00:00:00 1996 UTC = Mon Jan  1 00:00:00 1996 GMT isdst=0
Europe/London-Test  Mon Jan  1 00:00:00 1996 UTC = Mon Jan  1 00:00:00
1996 GMT isdst=0 Europe/London-Test  Mon Jan  1 00:00:01 1996 UTC = Mon
Jan  1 01:00:01 1996 BST isdst=1 Europe/London-Test  Tue Jan  2 01:59:59
1996 UTC = Tue Jan  2 02:59:59 1996 BST isdst=1 Europe/London-Test  Tue
Jan  2 02:00:00 1996 UTC = Tue Jan  2 02:00:00 1996 GMT isdst=0

See that the BST transition is now 1 second after midnight.

  David

On Tue, 13 Jun 2006, Olson, Arthur David (NIH/NCI) [E] wrote:

>> You can't see the problem with zdump, as the transition is not 
>> visible
> to it. But in Europe/London, there was a transition on 1996-01-01 
> 00:00:00.
>> Here's my dump of the zoneinfo file for the transition & one row
> either side of it...
>
> Here's what I get at elsie; note that the 1995/1996 leap second 
> transition does seem to be visible to zdump.
>
> 				--ado
>
> Script started on Tue 13 Jun 2006 01:12:41 PM EDT elsie$ cd ~/src/tz 
> elsie$ make install TOPDIR=$PWD/tmp REDO=right_only >&- elsie$ ./zdump

> -v Europe/London | grep 199[56] Europe/London  Sun Mar 26 00:59:59 
> 1995 UTC = Sun Mar 26 00:59:59 1995 GMT isdst=0 Europe/London  Sun Mar

> 26 01:00:00 1995 UTC = Sun Mar 26 02:00:00 1995 BST isdst=1 
> Europe/London  Sun Oct 22 00:59:59 1995 UTC = Sun Oct 22 01:59:59 1995

> BST isdst=1 Europe/London  Sun Oct 22 01:00:00 1995 UTC = Sun Oct 22 
> 01:00:00 1995 GMT isdst=0 Europe/London  Sun Dec 31 23:59:60 1995 UTC 
> = Sun Dec 31 23:59:60 1995 GMT isdst=0 Europe/London  Mon Jan  1 
> 00:00:00 1996 UTC = Mon Jan  1 00:00:00 1996 GMT isdst=0 Europe/London

> Sun Mar 31 00:59:59 1996 UTC = Sun Mar 31 00:59:59 1996 GMT isdst=0 
> Europe/London  Sun Mar 31 01:00:00 1996 UTC = Sun Mar 31 02:00:00 1996

> BST isdst=1 Europe/London  Sun Oct 27 00:59:59 1996 UTC = Sun Oct 27 
> 01:59:59 1996 BST isdst=1 Europe/London  Sun Oct 27 01:00:00 1996 UTC 
> = Sun Oct 27 01:00:00 1996 GMT isdst=0 elsie$ exit
>
> script done on Tue 13 Jun 2006 01:13:11 PM EDT
>
>
>