typedef struct { int r
[1]; } * physadr
;
typedef unsigned short ino_t
;
/* major part of a device */
#define major(x) (int)(((unsigned)x>>8)&0377)
/* minor part of a device */
#define minor(x) (int)(x&0377)
/* make a device number */
#define makedev(x,y) (dev_t)(((x)<<8) | (y))