typedef long daddr_t; /* disk address */ typedef char * caddr_t; /* core address */ typedef unsigned int ino_t; /* i-node number */ typedef long time_t; /* a time */ typedef int label_t[7]; /* program status */ typedef int dev_t; /* device code */ typedef long off_t; /* offset in file */ /* selectors and constructor for device code */ #define major(x) (int)(((unsigned)x>>8)) #define minor(x) (int)(x&0377) #define makedev(x,y) (dev_t)((x)<<8|(y))