comm(3tcl) on Linux
The text 5187ddca2e24, as Debian 12 (Bookworm) shipped it.
A remote communication facility for Tcl (8.5 and later)
Flags it lists
-
-chan -
-events -
-interp -
-listen -
-local -
-port -
-serial -
-silent -
-socket -
-socketcmd