mount_hfs(8) on macOS
The text b4285aa47539, as Mac OS X 10.6.8, Mac OS X 10.6.7, Mac OS X 10.6.6, Mac OS X 10.6.5, Mac OS X 10.6.4, Mac OS X 10.6.3, Mac OS X 10.6.2, Mac OS X 10.6.1, Mac OS X 10.6 shipped it.
mount an HFS/HFS+ file system
Flags it lists
-
-g -
-j -
-m -
-o -
-u -
-w -
-x