extern errno;
#define ENOENT 2 /* no such file, or directory missing */
#define EACCES 13 /* no access allowed */
#define ENOTDIR 20 /* part of pathname is not a directory */
struct inode
{ char minor, major;
int inumber, flags;
char nlinks, uid, gid, size0;
int size1, addr[8], actime[2], modtime[2];
};