/* * Random set of variables * used by more than one * routine. */char	canonb[CANBSIZ];	/* buffer for erase and kill (#@) */struct inode *rootdir;		/* pointer to inode of root directory */struct proc *runq;		/* head of linked list of running processes */int	cputype;		/* type of cpu =40, 45, or 70 */int	lbolt;			/* time of day in 60th not in time */time_t	time;			/* time in sec from 1970 *//* * Nblkdev is the number of entries * (rows) in the block switch. It is * set in binit/bio.c by making * a pass over the switch. * Used in bounds checking on major * device numbers. */int	nblkdev;/* * Number of character switch entries. * Set by cinit/tty.c */int	nchrdev;int	mpid;			/* generic for unique process id's */char	runin;			/* scheduling flag */char	runout;			/* scheduling flag */char	runrun;			/* scheduling flag */char	curpri;			/* more scheduling */int	maxmem;			/* actual max memory per process */physadr	lks;			/* pointer to clock device */daddr_t	swplo;			/* block number of swap space */int	nswap;			/* size of swap space */int	updlock;		/* lock for sync */daddr_t	rablock;		/* block to be read ahead */extern	char	regloc[];	/* locs. of saved user registers (trap.c) */char	msgbuf[MSGBUFS];	/* saved "printf" characters */dev_t	rootdev;		/* device of the root */dev_t	swapdev;		/* swapping device */dev_t	pipedev;		/* pipe device */extern	int	icode[];	/* user init code */extern	int	szicode;	/* its size */dev_t getmdev();daddr_t	bmap();struct inode *ialloc();struct inode *iget();struct inode *owner();struct inode *maknode();struct inode *namei();struct buf *alloc();struct buf *getblk();struct buf *geteblk();struct buf *bread();struct buf *breada();struct filsys *getfs();struct file *getf();struct file *falloc();int	uchar();/* * Instrumentation */int	dk_busy;long	dk_time[32];long	dk_numb[3];long	dk_wds[3];long	tk_nin;long	tk_nout;/* * Structure of the system-entry table */extern struct sysent {	char	sy_narg;		/* total number of arguments */	char	sy_nrarg;		/* number of args in registers */	int	(*sy_call)();		/* handler */} sysent[];