[unix-history] / usr / src / cmd / standalone / saio.h

/*
 * header file for standalone package
 */

/*
 * io block: includes an
 * inode, cells for the use of seek, etc,
 * and a buffer.
 */
struct	iob {
	char	i_flgs;
	struct inode i_ino;
	int i_unit;
	daddr_t	i_boff;
	daddr_t	i_cyloff;
	off_t	i_offset;
	daddr_t	i_bn;
	char	*i_ma;
	int	i_cc;
	char	i_buf[512];
};

#define F_READ	01
#define F_WRITE	02
#define F_ALLOC	04
#define F_FILE	010


/*
 * dev switch
 */
struct devsw {
	char	*dv_name;
	int	(*dv_strategy)();
	int	(*dv_open)();
	int	(*dv_close)();
};

struct devsw devsw[];

/*
 * request codes. Must be the same a F_XXX above
 */
#define	READ	1
#define	WRITE	2


#define	NBUFS	4


char	b[NBUFS][512];
daddr_t	blknos[NBUFS];


#define NFILES	4
struct	iob iob[NFILES];

/*
 * Set to which 32Kw segment the code is physically running in.
 * Must be set by the users main (or there abouts).
 */
int	segflag;
Commit	Line	Data
a570deab KT	1	/*
	2	* header file for standalone package
	3	*/
	4
	5	/*
	6	* io block: includes an
	7	* inode, cells for the use of seek, etc,
	8	* and a buffer.
	9	*/
	10	struct iob {
	11	char i_flgs;
	12	struct inode i_ino;
	13	int i_unit;
	14	daddr_t i_boff;
	15	daddr_t i_cyloff;
	16	off_t i_offset;
	17	daddr_t i_bn;
	18	char *i_ma;
	19	int i_cc;
	20	char i_buf[512];
	21	};
	22
	23	#define F_READ 01
	24	#define F_WRITE 02
	25	#define F_ALLOC 04
	26	#define F_FILE 010
	27
	28
	29
	30
	31	/*
	32	* dev switch
	33	*/
	34	struct devsw {
	35	char *dv_name;
	36	int (*dv_strategy)();
	37	int (*dv_open)();
	38	int (*dv_close)();
	39	};
	40
	41	struct devsw devsw[];
	42
	43	/*
	44	* request codes. Must be the same a F_XXX above
	45	*/
	46	#define READ 1
	47	#define WRITE 2
	48
	49
	50	#define NBUFS 4
	51
	52
	53	char b[NBUFS][512];
	54	daddr_t blknos[NBUFS];
	55
	56
	57
	58	#define NFILES 4
	59	struct iob iob[NFILES];
	60
	61	/*
	62	* Set to which 32Kw segment the code is physically running in.
	63	* Must be set by the users main (or there abouts).
	64	*/
65	int segflag;