On Fri, Jul 24, 2020 at 12:39 PM Random832 <random832@fastmail.com> wrote:

> 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".]
>
There is no such thing as cbreak in sixth edition.
http://man.cat-v.org/unix-6th/1/stty
It's raw or cooked.  Life is more interesting ;-)

Good luck