echo retained >"$todir"/bar/down/to/bar/baz/nodel.deep
cp -p "$todir"/bar/down/to/bar/baz/nodel.deep "$chkdir"/bar/down/to/bar/baz
echo retained >"$todir"/bar/down/to/bar/baz/nodel.deep
cp -p "$todir"/bar/down/to/bar/baz/nodel.deep "$chkdir"/bar/down/to/bar/baz