fsck_hfs(8) on macOS
The text 3fa64c1a3c59, as Mac OS X 10.6.2, Mac OS X 10.6.1, Mac OS X 10.6 shipped it.
HFS file system consistency check
Flags it lists
-
-B -
-D -
-b -
-c -
-d -
-f -
-g -
-l -
-m -
-n -
-p -
-q -
-r -
-x -
-y