On Thu, Jun 29, 2023 at 08:21:19AM +0000, Laurent Bercot wrote: > POSIX doesn't mandate any path other than /dev/null and /dev/console > and I'd rather not try executing them, who knows what weird permissions > they may have on obscure OSes.
Actually I mean a *directory* that is guaranteed to exist (and meanwhile unexecutable): so /dev here. > I agree it's a lot of work for not much, but as you said, the > behaviour is arguably conformant, and your experience proves that old > glibcs are still around, so I'd rather make posix_spawn usable where > it exists instead of placing the burden of --with-sysdep-posixspawn=no > on users who have a bad version. Well I was intending to suggest that we simpliy avoided posix_spawn*() where it disagreed with posix_spawn(3p); that is to say simply replacing all previous `#ifdef HASPOSIXSPAWN' conditions with `#if (defined HASPOSIXSPAWN) && (!defined SKALIBS_HASPOSIXSPAWNEARLYRETURN)'. After all it seems to me child_spawn*() is not used that prevalently, so the performance penalty is really minor; of course, feel free to correct me. And I probably also need to bring the incorrectness of posix_spawn(3) to the attention of its (Linux manpages) maintainers. -- My current OpenPGP key: RSA4096/0x227E8CAAB7AA186C (expires: 2024.09.30) 7077 7781 B859 5166 AE07 0286 227E 8CAA B7AA 186C
