bug#56606: Acknowledgement (29.0.50; recent master fails with "creating pipe: too many open files")

[Stephen Leake]

Eli Zaretskii <eliz@gnu.org> writes:

>> Cc: 56606@debbugs.gnu.org
>> Date: Sun, 17 Jul 2022 13:20:12 +0300
>> From: Eli Zaretskii <eliz@gnu.org>
>> 
>> > From: Stephen Leake <stephen_leake@stephe-leake.org>
>> > Date: Sun, 17 Jul 2022 02:42:04 -0700
>> > 
>> > On emacs-devel, Eli said:
>> > 
>> > AFAICT, this loop in deactivate_process:
>> > 
>> >   /* Beware SIGCHLD hereabouts.  */
>> > 
>> >   for (i = 0; i < PROCESS_OPEN_FDS; i++)
>> >     close_process_fd (&p->open_fd[i]);
>> > 
>> > doesn't close the last of the 4 descriptors opened by the 2 emacs_pipe
>> > calls in make-pipe-process.  It calls 'close' with the right value,
>> > and close returns zero, but the pipe stays open.  In Emacs 28, this
>> > same loop successfully closes the descriptor.  I don't know why.
>> > 
>> > Perhaps bisecting could help.
>> 
>> I think commit a81669c could be the culprit.
>
> I hope I fixed this now on master.
>

Yes, it is fixed, by 637436970f34f860d50f73a514b3bafd0c5cace7.

-- 
-- Stephe