scan_ffs(8) on OpenBSD
The text 29d4afee5353, as OpenBSD 3.3, OpenBSD 3.2, OpenBSD 3.1, OpenBSD 3.0, OpenBSD 2.9 shipped it.
find UFS/FFS partitions on a disk
Flags it lists
-
-b -
-e -
-l -
-s -
-v