Re: Cygwin PostgreSQL CVS Patch

Jason Tishler <Jason.Tishler@dothill.com> writes:
>> (b) socket file present but no postmaster attached ---
>> you can get that by kill -9'ing the postmaster ...

> Unfortunately, case b causes psql to hang.  Using gdb, I was able to
> trace that psql hangs calling select() in pqWait() (i.e.,
> src/interfaces/libpq/fe-misc.c line 739).

> I'm pretty sure that this is Cygwin bug.  I will try to formulate
> a minimal test for submission to the Cygwin list but I'm not that
> experienced with sockets.  Would anyone like to assist me with this
> endeavor?

You should be able to do something like just creating an unconnected
socket file and then trying to cat(1) from it ...

> I will hold off submitting the patch until this is fixed.

That might be an overreaction --- this does sound like a Cygwin bug
that should be reported and fixed, but the scenario won't happen in
normal operations.  Furthermore, if we wait for a confirmed Cygwin
fix, we'll likely miss the 7.1 release.  I'd suggest going ahead and
enabling AF_UNIX socket support for Cygwin; worst case is that we
warn people to be wary of it in Cygwin versions < something-or-other.

            regards, tom lane