SysIII/usr/include/sys/conf.h
/*
* 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.
*/
extern struct bdevsw
{
int (*d_open)();
int (*d_close)();
int (*d_strategy)();
struct iobuf *d_tab;
} bdevsw[];
/*
* Character device switch.
*/
extern struct cdevsw
{
int (*d_open)();
int (*d_close)();
int (*d_read)();
int (*d_write)();
int (*d_ioctl)();
} cdevsw[];
int bdevcnt;
int cdevcnt;
/*
* Line discipline switch.
*/
extern 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)();
} linesw[];
int linecnt;