mtree(8) on OpenBSD
The text 7e5f5f30192b, as OpenBSD 5.7, OpenBSD 5.6, OpenBSD 5.5 shipped it.
map a directory hierarchy
Flags it lists
-
-K -
-U -
-c -
-d -
-e -
-f -
-i -
-k -
-l -
-n -
-p -
-q -
-r -
-s -
-t -
-u -
-x