skip_unless test "$SUDO"
skip_if test "$UNAME" = "Darwin"

clean_scratch
mkdir scratch/{foo,mnt}
sudo mount -t tmpfs tmpfs scratch/mnt
ln -s ../mnt scratch/foo/bar
"$XTOUCH" scratch/mnt/baz
ln -s ../mnt/baz scratch/foo/qux

bfs_diff -L scratch -xdev
ret=$?

sudo umount scratch/mnt
return $ret