ksh(1) on Linux
The text d0e315b35be6, as Debian 1.1 (Buzz) shipped it.
Public domain Korn shell
Flags it lists
-
-H -
-S -
-a -
-c -
-d -
-f -
-i -
-l -
-m -
-n -
-r -
-s -
-t -
-v -
-w