UNIX Futures

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> > > >A program cannot catch '^Z'. This implies that 'vi' doesn't redraw its
> > > >screen.
>A program can catch ^Z, by  ``signal(SIGTSTP, stop_handler)''.
>Further, the program can also catch the continue -- which lets it redraw the
>screen or print a message or change its state or whatever.  I have several
>programs which do both.

I sure wish people would read before flaming.  The original article was
talking about SHELL LAYERS "shl" which is a System V poor imitation of
Berkeley job control.  Under Shell Layers, a ^Z (or equivalent keystroke)
passes the terminal input to a different program, but the program that was
intercepted is not told, and is NOT EVEN STOPPED (output will continue).