mtree(8) on macOS
The text e23e590affbe, as Mac OS X 10.1.5, Mac OS X 10.1.4, Mac OS X 10.1.3, Mac OS X 10.1.2, Mac OS X 10.1.1, Mac OS X 10.1, Mac OS X 10.0.4, Mac OS X 10.0 shipped it.
map a directory hierarchy
Flags it lists
-
-K -
-U -
-c -
-d -
-e -
-f -
-k -
-p -
-r -
-s -
-u -
-x