[RFC] posix: Make system, popen, and wordexp try pidfd_spawn first (BZ 34001)

[Adhemerval Zanella Netto]

On 05/05/26 10:05, Cristian Rodríguez wrote:
> On Mon, May 4, 2026 at 9:58 AM Adhemerval Zanella Netto
> <adhemerval.zanella@linaro.org> wrote:
>  (afaik waitid (PIDFD, ...) will signal an error if the process is
>> already reaped).
> 
> Yes, it will return ECHILD..afaik.

And I am not sure we can change it, because it will subtly change the functions
semantics and we will always need a clone fallback (that always send the signal)
for ABI that do not have clone3 and on kernel that do not support it.