sockstat(1) on FreeBSD
The text ef9ae6ec7cc9, as FreeBSD 5.2.1-RELEASE, FreeBSD 5.2-RELEASE, FreeBSD 5.1-RELEASE, FreeBSD 5.0-RELEASE shipped it.
list open sockets
Flags it lists
-
-4 -
-6 -
-c -
-l -
-p -
-u