[PATCH] sysdeps/wait: Use the waitid syscall if required

[Alistair Francis]

On Sat, Oct 12, 2019 at 5:24 AM Dmitry V. Levin <ldv@altlinux.org> wrote:
>
> On Wed, Sep 25, 2019 at 03:55:14PM -0700, Alistair Francis wrote:
> > If the waitpid and wait4 syscalls aren't avaliable (such as y2038 safe
> > 32-bit systems) let us use the waitid syscall isntead.
> >
> > Unfortunately waitid is substantially differnt to waitpid and wait4, so
> > the conversion ends up being complex.
> >
> > For full support we need the 5.4+ kernel as that allows a pid of 0 with
> > the P_PGID idtype.
> >
> > 2019-09-16  Alistair Francis  <alistair.francis@wdc.com>
> >
> >       * sysdeps/unix/sysv/linux/wait.c: Use the waitid syscall if required.
> >       * sysdeps/unix/sysv/linux/waitpid.c: Likewise.
> >       * sysdeps/unix/sysv/linux/waitpid_nocancel.c: Likewise.
>
> If wait4 is not available, shouldn't it be emulated as well as waitpid?

Yes, it is by the changed in wait.c.

Alistair

>
>
> --
> ldv