The former one was already used in tests, but was private.
These functions can be shared across the tests, so make them
public.
Signed-off-by: Marek Chalupa <mchqwerty@gmail.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Add facility for testing how (many) file descriptors survive an exec.
This allows implementing O_CLOEXEC tests.
Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
