#include <signal.h>
#include <stdio.h>

int nsigs;

main()
{
  int onintr();
  signal(SIGINT, onintr);  /* set interryupts handler for SIGINT */
  for(;;) /* forever */
	sleep(100);
}

onintr(sig)
{
  signal(SIGINT, onintr); /* set interrupt handler again */
  printf("signal %d received\n", sig);
  if (++nsigs >= 5)
	exit(0);
}