Making an APFS disk clone

Hi all,

I am attempting to make an application that makes a clone (a writable snapshot).

I believe the correct way to do this would be to pass the

O_CLONE

flag to fs_snapshot_create, however, this seems to not be working - the snapshot is still read-only.

Note: the issue is not the entiltement needed to run this, it just does not allow me to write files to the clone, and panicks.

Thanks!