Re: dup(0) fails on Ubuntu 20.04 and macOS 10.15 with 13.0

On 03.09.21 01:00, Tom Lane wrote:
> Mario Emmenlauer <mario(at)emmenlauer(dot)de> writes:
>> The idea to switch to dup(2) sounds very good to me.
>
> I poked at this some more, and verified that adding "fclose(stdin);"
> at the head of PostmasterMain is enough to trigger the reported
> failure. However, after changing fd.c to dup stderr not stdin,
> we can pass check-world even with that in place. So that confirms
> that there is no very good reason for the postmaster to require
> stdin to be available.
>
> Hence, I pushed the fix to make fd.c use stderr here. I only
> back-patched to v14, because given the lack of other complaints,
> I couldn't quite justify touching stable branches for this.

Thanks a lot Tom, its appreciated!

All the best,

Mario Emmenlauer