locktest(1) on Linux
The text 3289e68c4a14, as Debian 13 (Trixie) shipped it.
Find differences in locking between two SMB servers
Flags it lists
-
-A -
-B -
-E -
-M -
-O -
-R -
-U -
-Z -
-a -
-k -
-o -
-s -
-u