Robert Haas <robertmhaas@gmail.com> writes:
> On Thu, Mar 29, 2018 at 5:51 PM, Andres Freund <andres@anarazel.de> wrote:
>> I'm not sure we need to do anything about this, personally. This seems
>> like a fairly rare thing to do in a mode that's definitely not intended
>> to be general purpose.
> Mmmph. I don't really think it's possible to view a user-visible
> EBADF as anything other than a coding error.
If we think this is worth spending any code at all on, what I'd suggest
is to reject replication-related commands at some early stage if not
IsUnderPostmaster.
regards, tom lane