pdp11v/usr/include/sys/conf.h

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/* @(#)conf.h	1.1 */
/*
 * Declaration of block device switch. Each entry (row) is
 * the only link between the main unix code and the driver.
 * The initialization of the device switches is in the file conf.c.
 */
struct bdevsw {
	int	(*d_open)();
	int	(*d_close)();
	int	(*d_strategy)();
	int	(*d_print)();
};
extern struct bdevsw bdevsw[];

/*
 * Character device switch.
 */
struct cdevsw {
	int	(*d_open)();
	int	(*d_close)();
	int	(*d_read)();
	int	(*d_write)();
	int	(*d_ioctl)();
	struct tty *d_ttys;
};
extern struct cdevsw cdevsw[];

extern int	bdevcnt;
extern int	cdevcnt;

/*
 * Line discipline switch.
 */
struct linesw {
	int	(*l_open)();
	int	(*l_close)();
	int	(*l_read)();
	int	(*l_write)();
	int	(*l_ioctl)();
	int	(*l_input)();
	int	(*l_output)();
	int	(*l_mdmint)();
};
extern struct linesw linesw[];

extern int	linecnt;
/*
 * Terminal switch
 */
struct termsw {
	int	(*t_input)();
	int	(*t_output)();
	int	(*t_ioctl)();
};
extern struct termsw termsw[];

extern int	termcnt;