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- /*
- * 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 buf *d_tab;
- } bdevsw[];
-
- /*
- * Character device switch.
- */
- extern struct cdevsw
- {
- int (*d_open)();
- int (*d_close)();
- int (*d_read)();
- int (*d_write)();
- int (*d_ioctl)();
- int (*d_stop)();
- struct tty *d_ttys;
- } cdevsw[];
-
- /*
- * tty line control switch.
- */
- extern struct linesw
- {
- int (*l_open)();
- int (*l_close)();
- int (*l_read)();
- char *(*l_write)();
- int (*l_ioctl)();
- int (*l_rint)();
- int (*l_rend)();
- int (*l_meta)();
- int (*l_start)();
- int (*l_modem)();
- } linesw[];
-