int main(int argc, char* argv[])
{  
  int p[2];
  pipe(p);

  if(fork()) { /* père */
    close(p[1]);
    dup2(p[0], 0);
    close(p[0]);
    execlp("tee", "tee", argv[1], NULL);
    exit(EXIT_FAILURE);
  }
  else { /* fils */
    close(p[0]);
    dup2(p[1], 1);
    close(p[1]);
    execvp(argv[2], argv+2);
    exit(EXIT_FAILURE);
  }
  
  return EXIT_SUCCESS;
}