[tz] Question about invalid timezone file: no timezone found in OlsonData

[Paul Eggert]

On 6/8/21 7:14 AM, Joe Culler via tz wrote:

> I have a program running on Yocto.  When it runs, I get an error:
> /usr/share/zoneinfo/Israel: invalid timezone file: no timezone found in
> OlsonData
> 
> If I copy zoneinfo's directory from Linux distros (Debian, Ubutnu,
> ArchLinux),
> the program runs without an error.
> 
> I downloaded tzdb-2021a.tar.lz and installed it, encountered the same
> error.
> Did I miss something?  Thanks.

My guess from the diagnostic's wording is that it comes from the 
timezone-olson package for Haskell. If so, possibly you ran into 
timezone-olson bug #7 
<https://github.com/ygale/timezone-olson/issues/7>, which means that 
upgrading the current timezone-olson should fix your problem. If 
upgrading doesn't work, possibly a followup bug report there is in order.

You might also try building your copy of tzdata with 'make 
ZFLAGS=-bfat', which will generate fatter TZif files that might work 
better with a buggy TZif reader. For Israel, your TZif file should grow 
from 1074 to 2388 bytes if you build it that way. I'm attaching copies 
of slim and fat TZif files for Israel, and you can use these copies to 
check your work. There's a bit more about fat and slim files for Haskell 
at <https://hackage.haskell.org/package/tzdata>.

Yet another possibility is that /usr/share/zoneinfo/Israel simply isn't 
set up correctly. Typically it's a symbolic or hard link to 
/usr/share/zoneinfo/Asia/Jerusalem, and you can check that out. I don't 
know Yocto, but it's something like the following on Ubuntu:

514-day $ ls -li /usr/share/zoneinfo/Israel
1205004 lrwxrwxrwx 1 root root 14 Jan 27 08:51 
/usr/share/zoneinfo/Israel -> Asia/Jerusalem
515-day $ ls -liL /usr/share/zoneinfo/Israel
1194127 -rw-r--r-- 1 root root 2388 Jan 27 08:51 /usr/share/zoneinfo/Israel
516-day $ zdump -V -c 2021,2022 /usr/share/zoneinfo/Israel
/usr/share/zoneinfo/Israel  Thu Mar 25 23:59:59 2021 UT = Fri Mar 26 
01:59:59 2021 IST isdst=0 gmtoff=7200
/usr/share/zoneinfo/Israel  Fri Mar 26 00:00:00 2021 UT = Fri Mar 26 
03:00:00 2021 IDT isdst=1 gmtoff=10800
/usr/share/zoneinfo/Israel  Sat Oct 30 22:59:59 2021 UT = Sun Oct 31 
01:59:59 2021 IDT isdst=1 gmtoff=10800
/usr/share/zoneinfo/Israel  Sat Oct 30 23:00:00 2021 UT = Sun Oct 31 
01:00:00 2021 IST isdst=0 gmtoff=7200

or the following on Fedora:

4-penguin $ ls -li /usr/share/zoneinfo/Israel
2494621 -rw-r--r--. 3 root root 2388 Jan 25 19:02 /usr/share/zoneinfo/Israel
5-penguin $ find /usr/share/zoneinfo -inum 2494621
/usr/share/zoneinfo/Israel
/usr/share/zoneinfo/Asia/Jerusalem
/usr/share/zoneinfo/Asia/Tel_Aviv

with similar zdump output there.
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