Dan Nelson writes:
> ^Z sends a SIGTSTP, which can be caught (or ignored, in your case).
>
> 18 SIGTSTP stop process stop signal generated from
> keyboard
> > According to
> >
> > % stty -g
> > ... status=14:stop=13:susp=1a:time=0:werase=17: ...
> ^^^^^^^
> > 17 SIGSTOP stop process stop (cannot be caught or
> > ignored)
> >
> > And I think that 17 (decimal) is refered to as 1a (hexadecimal)
> > in the previous stty command.
>
> 1a hex just refers to the control code itself (^Z), and doesn't indicate
> which signal is sent.
Thanks to all. In this case, I made SIGTSTP have the
same effect in the program that CTRL-C does (SIGINT) so now
either signal makes the application remove the lock and quit
gracefully.
Again, many thanks to everybody.
Martin McCormick
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