On Fri, Jul 24, 2020, at 00:54, Paul Riley wrote:
> Noel,
>
> Thanks for your reply.
>
> I had suspected that the Unix behaviour was responsible, and you've
> made that clear with the "line at a time" assertion. I tried removing
> echo in STTY, but haven't tried raw.

You'll have a hard time exiting your program if you use raw mode - cbreak should be enough, and in that case ctrl-c will still work [but even in cbreak mode I believe there is no way to send "EOF".]