[tz] 回复: 回复: zoneinfo generating issues

[Ian Abbott]

On 06/03/2021 00:23, Michael H Deckers wrote:
> 
>        On 2021-03-05 20:29, Ian Abbott via tz wrote:
> 
>> The problem seems to be related to the use of leapseconds.
>>
>> # ./main -l "2022-11-01 00:00:00" -path /usr/share/zoneinfo -tz 
>> America/Adak
>> UTC: 2022-11-01 09:00:00 +0000 UTC
>> # ./main -l "2022-11-01 00:00:00" -path /usr/share/zoneinfo/right -tz 
>> America/Adak
>> UTC: 2022-11-01 10:00:00 +0000 UTC 
> 
> 
>        Shouldn't you compare
>           # ./main -l "2022-11-01 00:00:00" -path /usr/share/zoneinfo 
> -tz America/Adak
>        with
>           # ./main -l "2022-11-01 00:00:27" -path 
> /usr/share/zoneinfo/right -tz America/Adak?

Probably.  On the problematic container, that shows a UTC time of 
10:00:27, but on my Debian testing machines it shows a UTC time of 09:00:27.

There is something very dodgy about the installation of the "/right/" 
zone files in this container (based on x86_64 Alpine Linux 3.13, with 
its tzdata2021a-r0 package).  None of the DST transitions after 2021 
seem to be working:

# zdump -c 2021,2023 -i /usr/share/zoneinfo/right/Pacific/Fiji

TZ="/usr/share/zoneinfo/right/Pacific/Fiji"
-	-	+125933	"+13"	1
2021-01-17	02	+115933	"+12"
2021-11-14	03	+125933	"+13"	1

Compare with the normal zone files:

# zdump -c 2021,2023 -i /usr/share/zoneinfo/Pacific/Fiji

TZ="/usr/share/zoneinfo/Pacific/Fiji"
-	-	+13		1
2021-01-17	02	+12
2021-11-14	03	+13		1
2022-01-16	02	+12
2022-11-13	03	+13		1

I've attached the "right" and "normal" versions of the Fiji zoneinfo 
files as "right.Pacific.Fiji" and "Pacific.Fiji" respectively.

Some metadata differences between the files:

$ file Pacific.Fiji right.Pacific.Fiji
Pacific.Fiji:       timezone data, version 3, no gmt time flags, no std 
time flags, no leap seconds, 64 transition times, 3 abbreviation chars
right.Pacific.Fiji: timezone data, version 2, no gmt time flags, no std 
time flags, 27 leap seconds, 31 transition times, 3 abbreviation chars

Also, right.Pacific.Fiji has no TZ string on the end.

-- 
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