From: Nit Khair <sentinel.2001@...>
Date: 2008-10-14T03:01:31+09:00
Subject: Unable to trap C-z, C-y, C-s and C-q

I need to trap ^Y, ^Z, ^S, ^Q etc in my app. Have googled a lot but
unable to find anything.

Finally, I wrote a program and trapped all the signals.

1. Both C-z and C-y are trapped by SIGTSTP, but there is no key in
getch() that they seem to trigger. Regardless of whether I use "SIG_IGN"
or print, my curses program aborts.


2. I am still not getting C-s and C-q. They are not caught by any
signal.

My code inside a ncurses program is like this:

%w[ TSTP CONT ABRT HUP STOP PIPE IO IOT CHLD CLD ILL INFO QUIT SYS TRAP
TTOU  URG USR1 USR2 ].each { | alrm |
  #Signal.trap("SIG#{alrm}") { stdscr.mvprintw(17, 2, "%-40s" % "#{alrm}
");

 stdscr.refresh; }        Signal.trap("SIG#{alrm}") { "SIG_IGN" }

}

The commented line prints TSTP for both C-y and c-z and exits.
The second exits.

Its not a terminal setting since I use Vim and alpine and they use these
keys.
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