/* <dibdef.h>
 *
 *	Device information block definitions
 */
#ifndef _DIBDEF_H
#define _DIBDEF_H

#define DIB$K_LENGTH 116		/*length of total buffer */
#define DIB$C_LENGTH 116
struct dibdef {
    unsigned long dib$l_devchar;	/*device characteristics */
    unsigned char dib$b_devclass;	/*device class */
    unsigned char dib$b_devtype;	/*device type */
    unsigned short dib$w_devbufsiz;	/*device buffer size */
    union {
	unsigned long dib$l_devdepend;	/*device dependent information */
	struct {
	    unsigned char dib$b_sectors;    /*(disk only) sectors per track */
	    unsigned char dib$b_tracks;     /* " tracks per cylinder */
	    unsigned short dib$w_cylinders; /* " number of cylinders */
	} dib$r_devdepend_fields;
    } dib$r_devdepend_overlay;
    unsigned short dib$w_unit;		/*device unit number */
    unsigned short dib$w_devnamoff;	/*offset to device name counted string */
    unsigned long dib$l_pid;		/*device owner process identification */
    unsigned long dib$l_ownuic;		/*device owner user identification code */
    unsigned short dib$w_vprot;		/*device protection mask */
    unsigned short dib$w_errcnt;	/*device error count */
    unsigned long dib$l_opcnt;		/*device operations count */
    unsigned short dib$w_volnamoff;	/*offset to volume label counted string */
    unsigned short dib$w_recsiz;	/*blocked record size */
    char dib$t_devname[76];		/*space for devname and label (64+12) */
    unsigned long dib$l_maxblock;	/*disk volume size in blocks */
};

#endif	/*_DIBDEF_H*/