Return value of PathNameOpenFile()

I've noticed that some callers of PathNameOpenFile()
(e.g. bbsink_server_begin_archive()) consider the call failed even if the
function returned zero, while other ones do check whether the file descriptor
is strictly negative. Since the file descriptor is actually returned by the
open() system call, I assume that zero is a valid result, isn't it?

-- 
Antonin Houska
Web: https://www.cybertec-postgresql.com