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

int etat = 0;

void traite_SIGINT()
{
  if(etat == 2) etat = 3;
  else etat = 1;
}
  
void traite_SIGTSTP()
{
  if(etat == 1) etat = 2;
  else 
  if(etat == 3) exit(0);
  else etat = 0;
}


main()
{
  

  struct sigaction action;

  action.sa_handler = traite_SIGINT;
  sigemptyset(&action.sa_mask);
  action.sa_flags = 0;
  sigaction(SIGINT,&action,NULL);

  action.sa_handler = traite_SIGTSTP;
  sigemptyset(&action.sa_mask);
  action.sa_flags = 0;
  sigaction(SIGTSTP,&action,NULL);


  while(1) {
  }

}