fsck(8) on macOS
The text 17a5f0d78021, 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.
filesystem consistency check and interactive repair
Flags it lists
-
-b -
-f -
-l -
-m -
-n -
-p -
-q -
-y