[tz] zic fails for soft-links-only target volume

[Tom Lane]

Paul Eggert <eggert at cs.ucla.edu> writes:
> I fixed this in the attached patch by using linkat with 
> AT_SYMLINK_FOLLOW, as this is immune to the problem of resolving 
> symlinks and is the intended meaning here anyway. On older systems 
> lacking linkat, the code checks whether the source is a symlink and 
> refuses to hard-link to it; this should be good enough.

hmmm ...

> Thanks again for the diagnosis and suggestions. Please try the attached 
> patch, which I've installed into the development repository.

Running with this code on a Linux box, with a modification to force
staysymlink true, I get a lot of symlinks that seem to be misdirected.
For example the toplevel Cuba link looks like

lrwxrwxrwx. 1 postgres postgres   17 Nov  3 20:39 Cuba -> ../America/Havana

when it should be just America/Havana.

			regards, tom lane