#define LIN_SIZ	82

typedef struct {
    int		left;
    int		right;
    char	lin[LIN_SIZ];
} LIN_PTR;

int     BUF_init(char *drv);
void    BUF_end(void);

LIN_PTR *get_lin(int no);
int	xalloc(void);
int	xfree(int no);