Function check_destination 

pub fn check_destination(
    target: &Utf8Path,
    destination: &Utf8Path,
) -> Result<(), DestinationRefusal>

Check that touching destination under target stays inside the target.

No symlink on any component, directories where directories are needed, and nothing but a regular file (or nothing) at the end.

Errors

A DestinationRefusal naming what was found.