[tz] Posix time zone question

[Petr Machata]

Donald MacQueen <dmacq at erols.com> writes:

> But if posix/America/Detroit and America/Detroit are the same, what is
> the point of even having posix/America/Detroit?

X is whatever happens to be the default, right/X is explicitly with leap
seconds, posix/X is explicitly without them.

I seem to recall that identical zones are hardlinked, so having two (or
several) files like that only has an overhead of one inode.  At least on
Linux, I don't know how AIX works in this regard.

Thanks,
PM