38 struct disk		disk;  variable
50 	disk.dk_name = strdup(name);  in DISK_open()
51 	if (disk.dk_name == NULL)  in DISK_open()
53 	disk.dk_fd = opendev(disk.dk_name, oflags, OPENDEV_PART, NULL);  in DISK_open()
54 	if (disk.dk_fd == -1)  in DISK_open()
55 		err(1, "opendev('%s', 0x%x)", disk.dk_name, oflags);  in DISK_open()
56 	if (fstat(disk.dk_fd, &st) == -1)  in DISK_open()
57 		err(1, "fstat('%s)", disk.dk_name);  in DISK_open()
59 		errx(1, "%s is not a character device", disk.dk_name);  in DISK_open()
60 	if (ioctl(disk.dk_fd, DIOCGPDINFO, &dl) == -1)  in DISK_open()
64 	if (disk.dk_size > 0) {  in DISK_open()
66 		sz = disk.dk_size;  in DISK_open()
67 		disk.dk_heads = 1;  in DISK_open()
68 		disk.dk_sectors = 64;  in DISK_open()
69 		disk.dk_size = DL_BLKTOSEC(&dl, sz);  in DISK_open()
70 		disk.dk_cylinders = disk.dk_size / disk.dk_sectors;  in DISK_open()
71 	} else if (disk.dk_cylinders > 0) {  in DISK_open()
73 		sz = disk.dk_cylinders * disk.dk_heads * disk.dk_sectors;  in DISK_open()
74 		disk.dk_size = DL_BLKTOSEC(&dl, sz);  in DISK_open()
75 		disk.dk_sectors = DL_BLKTOSEC(&dl, disk.dk_sectors);  in DISK_open()
77 		disk.dk_cylinders = dl.d_ncylinders;  in DISK_open()
78 		disk.dk_heads = dl.d_ntracks;  in DISK_open()
79 		disk.dk_sectors = dl.d_nsectors;  in DISK_open()
81 		spc = (uint64_t)disk.dk_heads * disk.dk_sectors;  in DISK_open()
84 			disk.dk_cylinders = UINT32_MAX / spc;  in DISK_open()
85 			disk.dk_size = disk.dk_cylinders * spc;  in DISK_open()
87 			disk.dk_size = sz;  in DISK_open()
90 	if (disk.dk_size == 0)  in DISK_open()
93 	if (disk.dk_bootprt.prt_ns > 0) {  in DISK_open()
94 		ns = disk.dk_bootprt.prt_ns + DL_BLKSPERSEC(&dl) - 1;  in DISK_open()
95 		bs = disk.dk_bootprt.prt_bs + DL_BLKSPERSEC(&dl) - 1;  in DISK_open()
96 		disk.dk_bootprt.prt_ns = DL_BLKTOSEC(&dl, ns);  in DISK_open()
97 		disk.dk_bootprt.prt_bs = DL_BLKTOSEC(&dl, bs);  in DISK_open()
108 	size = units_size(units, disk.dk_size, &ut);  in DISK_printgeometry()
109 	printf("Disk: %s\tgeometry: %d/%d/%d [%.0f ", disk.dk_name,  in DISK_printgeometry()
110 	    disk.dk_cylinders, disk.dk_heads, disk.dk_sectors, size);  in DISK_printgeometry()
130 	off = lseek(disk.dk_fd, where, SEEK_SET);  in readsectors()
142 	len = read(disk.dk_fd, secbuf, bytes);  in readsectors()
171 	off = lseek(disk.dk_fd, where, SEEK_SET);  in writesectors()
179 	len = write(disk.dk_fd, buf, bytes);  in writesectors()