Assuming all that is true, in that case you must be aware that the unusual requirements you're placing makes this completely impossible. I just don't understand

Assuming all that is true, in that case you must be aware that the unusual requirements you're placing makes this completely impossible. I just don't understand how you can claim to understand how terminals work yet still expect the kind of behaviour you're expecting and making the kind of comments you've been making. Honestly, just stick this stuff behind a terminal multiplexer and move on with your life. You're trying to over-engineer a solution to a problem you're inventing.