> The glibc 2.36 added wrappers for Linux syscall pidfd_open,
> pidfd_getfd,
> and pidfd_send_signal, and exported the P_PIDFD to use along with
> waitid. The pidfd is a race-free interface, however, the pidfd_open
> is
> subject to TOCTOU if the file descriptor is not obtained directly
> from
> the clone or clone3 syscall (there is still a small window between
> the
> clone return and the pidfd_getfd where the process can be reaped and
> the
> process ID reused).

Thanks, this looks great and will make use of all these new APIs from
systemd as soon as they are available, so for the series:

Acked-by: Luca Boccassi <bluca@debian.org>

-- 
Kind regards,
Luca Boccassi