1  int *
       2  __errno_location (void);
       3  
       4  long int
       5  read (int, void *, unsigned long int);
       6  
       7  struct IOBUF {
       8    int fd;
       9  };
      10  
      11  void
      12  do_getline_end_data (struct IOBUF *iop, int tree)
      13  {
      14    char end_data;
      15  
      16    if (tree)
      17      *__errno_location () = 0;
      18  
      19    read (iop->fd, &end_data, sizeof end_data);
      20  }