Ever needed to convert an Ingres 2 letter listen address to a TCP socket address? Download and compile CVlisten.c. This should build on Linux without issue (providing you have a C compiler/linker) using the following:
cc -o CVlisten CVlisten.c
CVlisten usage: cvlisten remote_listen_address (as in II0)
for example
CVlisten II7 gives
GCC Remote listen address resolves to port # 21071
