unreliable_sig.c

   1 int sig_handler();            /* handler function */
   2 int main()
   3 {
   4     ...
   5     signal(SIGINT, sig_handler);  /* establish handler */
   6     ...
   7 }
   8
   9 int sig_handler()
  10 {
  11     signal(SIGINT, sig_handler);  /* restablish handler */
  12     ...                           /* process signal */
  13 }