🚀 go-pugleaf

An application that I am developing requires a more sophisticated keyboard
input processing than getc() can provide.  getc (stdin) returns only
when a crlf is detected.

I need (to write) a routine that returns either at the end of a line
or if the _first_ character typed is a specified "hot key" (e.g. a
function key).  As a side-effect, I need each key pressed to echo to
stdout and also to tee into a file (for a keystroke saver).

I would like this routine to handle file streams, as well (without the
"hot key" detection).

In Borland C++ (3.0) and MSC, there is a routine called getch which
gets a character directly from the console.  I can use this and
isatty() to write my own getc that does what I want.  The problem is,
I would like to attempt to make this routine portable to other
compilers and to UN*X; i.e. using ANSIC or C++ constructs only.
getch() is _not_ ANSI.

Is this possible?

Thanks in advance.
-Elliot