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

static int counter = 0;
static int killed = 0;

int killit ()
{
  killed++;
  return kill (getpid (), (killed & 1) ? SIGUSR1 : SIGHUP);
}

int killit0 ()
{
  return killit ();
}

int ouch (int sig)
{
  int real_counter = counter & ~0x400000;
  int recursed = real_counter & counter;
  counter = real_counter;
  if ((++counter & 1) || (counter < 10))
    killit0 ();
  printf ("sig %d, counter %d%s\n", sig, counter, recursed ? ", recursed" : "");
  sig = 27;
  counter |= 0x400000;
}

int bye (int sig)
{
  printf ("sig %d, kill counter %d, counter %d\n", sig, killed, counter);
  exit (0);
}

int
main (int argc, char **argv)
{
  signal (SIGHUP, ouch);
  signal (SIGUSR1, ouch);
  signal (SIGINT, bye);
  while (killit () == 0)
    {
      counter &= ~0x400000;
      puts ("sent");
    }
}