I would like to intercept Ctrl-S/Ctrl-Q from STDIN, so I can pass them on to child processes.

I wrote a simple test program to attached routines to all the signals available so as to explore if a signal was available. But it seems Ctrl-S/Ctrl-Q is trapped before it gets to STDIN.

For the parent process, the normal flow control works just fine with output, Ctrl-S stops the output flow and the program, and Ctrl-Q resumes the output.

My main requirement is having the ability for a parent process to temporary halt a child process. The old fashion XOFF/XON or Ctrl-S/Ctrl-Q seems the natural choice, plus its built-in, if I can detect the chars to send to the child process.

Thanks for any help.

PS. This is on Windows

In reply to How to intercept ctrl-S/ctrl-Q characters from STDIN by JohnBurley

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