/* * Random set of variables * used by more than one * routine. */char	canonb[CANBSIZ];	/* buffer for erase and kill (#@) */int	coremap[CMAPSIZ];	/* space for core allocation */int	swapmap[SMAPSIZ];	/* space for swap allocation */int	*rootdir;		/* pointer to inode of root directory */int	cputype;		/* type of cpu =40, 45, or 70 */int	execnt;			/* number of processes in exec */int	lbolt;			/* time of day in 60th not in time */int	time[2];		/* time in sec from 1970 */int	tout[2];		/* time of day of next sleep *//* * The callout structure is for * a routine arranging * to be called by the clock interrupt * (clock.c) with a specified argument, * in a specified amount of time. * Used, for example, to time tab * delays on teletypes. */struct	callo{	int	c_time;		/* incremental time */	int	c_arg;		/* argument to routine */	int	(*c_func)();	/* routine */} callout[NCALL];/* * Mount structure. * One allocated on every mount. * Used to find the super block. */struct	mount{	int	m_dev;		/* device mounted */	int	*m_bufp;	/* pointer to superblock */	int	*m_inodp;	/* pointer to mounted on inode */} mount[NMOUNT];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 */int	*lks;			/* pointer to clock device */int	rootdev;		/* dev of root see conf.c */int	swapdev;		/* dev of swap see conf.c */int	swplo;			/* block number of swap space */int	nswap;			/* size of swap space */int	updlock;		/* lock for sync */int	rablock;		/* block to be read ahead */char	regloc[];		/* locs. of saved user registers (trap.c) */