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

void ouch (int sig)
{
  printf ("got signal %d\n", sig);
  return;
}

int
main (int argc, char **argv)
{
  if (getppid() != 1 && fork())
    exit(0);
  signal (SIGUSR1, ouch);
  while (pause ())
    {
      puts ("execing myself");
      execv (argv[0], argv);
    }
  exit (0);
}