[unix-history] / sys / stand / saio.h

/*	saio.h	4.4	3/15/81	*/

/*
 * 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[BSIZE];
};

#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][BSIZE];
daddr_t	blknos[NBUFS];

#define NFILES	4
struct	iob iob[NFILES];
Commit	Line	Data
e6d9ed6d C	1	/* saio.h 4.4 3/15/81 */
	2
	3	/*
	4	* header file for standalone package
	5	*/
	6
	7	/*
	8	* io block: includes an
	9	* inode, cells for the use of seek, etc,
	10	* and a buffer.
	11	*/
	12	struct iob {
	13	char i_flgs;
	14	struct inode i_ino;
	15	int i_unit;
	16	daddr_t i_boff;
	17	daddr_t i_cyloff;
	18	off_t i_offset;
	19	daddr_t i_bn;
	20	char *i_ma;
	21	int i_cc;
	22	char i_buf[BSIZE];
	23	};
	24
	25	#define F_READ 01
	26	#define F_WRITE 02
	27	#define F_ALLOC 04
	28	#define F_FILE 010
	29
	30	/*
	31	* dev switch
	32	*/
	33	struct devsw {
	34	char *dv_name;
	35	int (*dv_strategy)();
	36	int (*dv_open)();
	37	int (*dv_close)();
	38	};
	39
	40	struct devsw devsw[];
	41
	42	/*
	43	* request codes. Must be the same a F_XXX above
	44	*/
	45	#define READ 1
	46	#define WRITE 2
	47
	48	#define NBUFS 4
	49
	50	char b[NBUFS][BSIZE];
	51	daddr_t blknos[NBUFS];
	52
	53	#define NFILES 4
	54	struct iob iob[NFILES];