Re: master 16bb108: Add a regression test for Bug#24325.

[Robert Pluim]

Philipp Stephani <p.stephani2@gmail.com> writes:

> Am Di., 29. Dez. 2020 um 18:56 Uhr schrieb Michael Albinus
> <michael.albinus@gmx.de>:
>>
>> p.stephani2@gmail.com (Philipp Stephani) writes:
>>
>> Hi Philipp,
>>
>> > +(ert-deftest process-tests/fd-setsize-no-crash ()
>> > +  "Check that Emacs doesn't crash when trying to use more than
>> > +FD_SETSIZE file descriptors (Bug#24325)."
>> > +  (let ((sleep (executable-find "sleep"))
>> > +        ;; FD_SETSIZE is typically 1024 on Unix-like systems.
>> > +        (fd-setsize 1024)
>>
>> This could be determined by "ulimit -n" or "getconf OPEN_MAX".
>>
>
> That's a different limit (resource limit vs. size of a file descriptor set).

Itʼs possible to raise FD_SETSIZE at compile time on macOS (to 4096 if
memory serves), so the only reliable way to test this is to expose
FD_SETSIZE to lisp. poll(2) anyone? ;-)

Robert