xxopen
#define netopen xxopen
#define ctopen xxopen
#define rdopen xxopen
#define sdopen xxopen
{ "??", xxstrategy, xxopen, xxclose, noioctl }, /*1*/
{ "??", xxstrategy, xxopen, xxclose, noioctl }, /*3*/
{ "??", xxstrategy, xxopen, xxclose, noioctl }, /*5*/
#define netopen xxopen
#define sdopen xxopen
extern int xxopen(struct open_file *, ...);