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cwinapimingw32

How to prevent Console Application from terminating when pressing "Ctrl+C" in C?

I found that Console Application compiled from GCC on Windows always terminate when pressing Ctrl+C.

Is there any feasible way to prevent Console Application from terminating when pressing Ctrl+C?

Solution

  • When the user presses control C, a signal (SIGINT) is sent to your process. When most signals are sent to a process, that process must either handle the signal or the operating system will kill it. So... all you need to do is install a signal handler for SIGINT.

    The following is untested:

    #include <signal.h>
static void ignore_control_c(int sig)
{
    /* re-arm the signal handler but otherwise ignore the signal */
    signal(sig, ignore_control_c);
}

int main(int argc, char *argv)
{
   signal(SIGINT, ignore_control_c);
   ...