Re: pg_ctl start may return 0 even if the postmaster has been already started on Windows

Hello,

Somebody seems to have trimmed the CC field upthread for no apparent
reason. I put it back the way I think it was when that happened.

Here's a rebased version of this patch. This is pretty much just
Bryan's patch, which I agree is a good way forward, though perhaps not
very backpatchable. I suspect we need to consider this one for mastern
only, and use a less intrusive version for backpatching -- perhaps
Kyotaro's earlier version.

Regarding this patch, I haven't really reviewed it -- but I wonder why
we need two global variables to keep postmaster's PID: the newly
introduced pm_pid (which was previously a local variable only) and the
preexisting postmasterPID. I suspect this needs to be cleaned up.

--
Álvaro Herrera Breisgau, Deutschland — https://www.EnterpriseDB.com/
"Los minutos y los segundos son mercadería de la ciudad, donde un infeliz se
afana por no perder ni siquiera un segundo y no advierto que obrando de ese
modo pierde una vida." ("La vuelta de Don Camilo", G. Guareschi)