[tz] zic changes (2/2)
aurelien at aurel32.net
Thu Mar 3 20:18:03 UTC 2016
On 2016-03-03 11:59, Guy Harris wrote:
> On Mar 3, 2016, at 7:56 AM, Aurelien Jarno <aurelien at aurel32.net> wrote:
> > On 2016-03-02 16:59, Guy Harris wrote:
> >> What happens with TZ=PST8PDT?
> > This works as expected.
> ...because it finds a tzdb file named "PST8PDT".
Correct, strace confirms that.
> >> What happens if you remove the PST8PDT link to America/Los_Angeles and use "TZ=PST8PDT"?
> > It doesn't seems that PST8PDT is a link to America/Los_Angeles, here it
> > is is a different file. That said after removing the file using
> > TZ=PST8PDT starts to show the same issue as with PST+8PDT, that is:
> > $ TZ=PST8PDT date --date=@1152995400
> > Sat Jul 15 12:30:00 PST 2006
> As I expected.
In that case strace tells the posixrules file is opened instead.
> >> What happens if you remove a link for some zone east of Greenwich and try *that* zone's POSIX specification?
> > I am not really sure what you mean here. Something like removing the MET
> > file and trying to use for example the MET-1METDST timezone?
> Yes, that's what I meant, if "the MET file" is a file whose name is "MET-1METDST".
> > In that case I get the correct output with and without the file:
> > $ TZ=MET-1METDST date --date=@1152995400
> > Sat Jul 15 22:30:00 METDST 2006
> So you removed a time zone file named "MET-1METDST" and then ran that date command, and it reported a time in DST?
No, I removed the MET file, as the MET-1METDST doesn't exist. Actually I
haven't found a zone with DST whose name matches a POSIX specification
and that is east of Greenwich. Do you have an example about a zone I
Aurelien Jarno GPG: 4096R/1DDD8C9B
aurelien at aurel32.net http://www.aurel32.net
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