C program that ignores Ctrl-C for 5 seconds; afterward, the loop can be killed.

stoploopwithctrlc.c

#include <stdio.h>
#include <signal.h>
main ()
{
 	void (*oldHandler) (); /* To hold old handler value */
 	int count = 0;   /* Loop counter, initialized at 0 */
 	oldHandler = signal (SIGINT, SIG_IGN);   /* Ignore Control-C */
  printf ("I've started looping and I can't be killed with ^C\n");
 	while(1)
 	{
	 	sleep (1);
		printf("Still looping...");
	 	count++;
	 	if (count == 5)
	 	{
		 	signal (SIGINT, oldHandler); /* Restore old handler */
		 	printf ("I'm still looping but I can be killed with ^C now\n");
	 	}
 	}
}