mount_hfs(8) on macOS
The text e4f270d475f1, as Mac OS X 10.3.9, Mac OS X 10.3.8, Mac OS X 10.3.7, Mac OS X 10.3.6, Mac OS X 10.3.5, Mac OS X 10.3.4, Mac OS X 10.3.3, Mac OS X 10.3.2, Mac OS X 10.3.1, Mac OS X 10.3 shipped it.
mount an HFS/HFS+ file system
Flags it lists
-
-g -
-m -
-o -
-u -
-w -
-x