Character Driver Entry Points

	int xxopen(dev_t *devp, int flag, int otyp, cred_t *credp);
 	int xxclose(dev_t dev, int flag, int otyp, cred_t *credp);
 	int xxread(dev_t dev, struct uio *uiop, cred_t *credp);
 	int xxwrite(dev_t dev, struct uio *uiop, cred_t *credp);
 	int xxioctl(dev_t dev, int cmd, intptr_t arg, int mode,
 				cred_t *credp, int *rvalp);
 	int xxdevmap(dev_t dev, devmap_cookie_t dhp, offset_t off,
 				size_t len, size_t *maplen, uint_t model);
 	int xxmmap(dev_t dev, off_t off, int prot);
 	int xxsegmap(dev_t dev, off_t off, struct as *asp,
 				caddr_t *addrp, off_t len, unsigned int prot,
 				unsigned int maxprot, unsigned int flags,
 				cred_t *credp);
 	int xxchpoll(dev_t dev, short events, int anyyet,
 				short *reventsp, struct pollhead **phpp);
 	int xxprop_op(dev_t dev, dev_info_t *dip,
 				ddi_prop_op_t prop_op, int mod_flags,
 				char *name, caddr_t valuep, int *length);
 	int xxaread(dev_t dev, struct aio_req *aio, cred_t *credp);
 	int xxawrite(dev_t dev, struct aio_req *aio, cred_t *credp);

For information on character driver entry points, see Chapter 9, Drivers for Character Devices.