if(!*bytesread)

    {

      switch(errno)

	{

	case EPIPE:

	  /* 

	     the program closed the pipe (died)

	  */

	fprintf(stderr, "execio_write: the child program closed its stdin pipe\n");

	eio->state = EXECIO_STATE_EOF;

	break;

	default:

	  fprintf(stderr, "execio_write: unhandled error writing to an fd: \n");

	  perror("write");

	  eio->state = EXECIO_STATE_ERROR;

	  break;

	}

      return 1;

    }

  return 0;

}

enum execio_state execio_state(struct execio *eio)

{

  return eio->state;

}

int execio_close(struct execio *eio)

{

  int childstatus;

  close(eio->pipe_read);

  close(eio->pipe_write);

  /* maybe we should just kill rather than term the child */

  kill(eio->child, SIGTERM);

  /* 

     the waitpid(2) seems to indicate that only when the child is terminated will this wait return. 

     This are of code will probably need improving - the ability to seng SIGKILL after a timeout? So we'll output a debug line before running waitpid

  */

  fprintf(stderr, "execio_close: running waitpid\n");

  waitpid(eio->child, &childstatus, 0);

  return 0;

}