fsck_4.2bsd(8) on FreeBSD
The text 28d23b9b9ef4, as FreeBSD 8.2-RELEASE shipped it.
file system consistency check and interactive repair
Flags it lists
-
-B -
-C -
-F -
-b -
-c -
-f -
-m -
-n -
-p -
-r -
-y