/* * Accounting structures */typedef	unsigned short comp_t;	/* "floating pt": 3 bits base 8 exp, 13 bits fraction */struct	acct{	char	ac_comm[10];		/* Accounting command name */	comp_t	ac_utime;		/* Accounting user time */	comp_t	ac_stime;		/* Accounting system time */	comp_t	ac_etime;		/* Accounting elapsed time */	time_t	ac_btime;		/* Beginning time */	short	ac_uid;			/* Accounting user ID */	short	ac_gid;			/* Accounting group ID */	short	ac_mem;			/* average memory usage */	comp_t	ac_io;			/* number of disk IO blocks */	dev_t	ac_tty;			/* control typewriter */	char	ac_flag;		/* Accounting flag */};extern	struct	acct	acctbuf;extern	struct	inode	*acctp;		/* inode of accounting file */#define	AFORK	01		/* has executed fork, but no exec */#define	ASU	02		/* used super-user privileges */