Zugschlusbeobachtungen

Dear Lazyweb, can anybody with some advanced socat-foo tell me the command line needed to have socat create a socket in the local file system and to listen on it, so that I can have Virtualbox connect a virtual serial console to it?

The material available on socat on the web is sparse, and virtualbox-related docs usually contain “tick the create pipe option”, which is not helpful here since I would like to see the first output the virtual machine prints to its serial port. It would be vastly more useful to have the socket already created with socat listening so that I can immediately see what is being printed to the socket.