135 	edit.disk = opendisk(argv[0], rdonly, file);  in main()
136 	if(edit.disk == nil) {  in main()
142 		edit.disk->secsize = secsize;  in main()
143 		edit.disk->secs = edit.disk->size / secsize;  in main()
146 	sec2cyl = edit.disk->h * edit.disk->s;  in main()
147 	edit.end = edit.disk->secs / sec2cyl;  in main()
168 	fprint(2, "cylinder = %lld bytes\n", sec2cyl*edit.disk->secsize);  in main()
371 diskread(Disk *disk, void *data, int ndata, u32int sec, u32int off)  in diskread()  argument
373 	if(seek(disk->fd, (vlong)sec*disk->secsize+off, 0) != (vlong)sec*disk->secsize+off)  in diskread()
375 	if(readn(disk->fd, data, ndata) != ndata)  in diskread()
380 diskwrite(Disk *disk, void *data, int ndata, u32int sec, u32int off)  in diskwrite()  argument
383 	if(seek(disk->wfd, (vlong)sec*disk->secsize+off, 0) != (vlong)sec*disk->secsize+off)  in diskwrite()
385 	if(write(disk->wfd, data, ndata) != ndata)  in diskwrite()
456 		if(diskwrite(edit->disk, &rtab[i].table, Tablesz, rtab[i].lba, Toffset) < 0)  in recover()
465 	ctlfd = edit->disk->ctlfd;  in recover()
466 	offset = edit->disk->offset;  in recover()
501 	diskread(edit->disk, &table, Tablesz, mbroffset+lba, Toffset);  in rdpart()
539 	diskread(edit->disk, &table, Tablesz, 0, Toffset);  in findmbr()
545 			mbroffset = edit->disk->s;  in findmbr()
646 		bigstart += edit->disk->s;  in autopart()
647 		bigsize -= edit->disk->s;  in autopart()
777 	sz = (b-a)*edit->disk->secsize*sec2cyl;  in cmdsum()
797 			edit->disk->width, a, edit->disk->width, b, b-a, sz, suf, ty);  in cmdsum()
800 			edit->disk->width, a, edit->disk->width, b,  b-a,  in cmdsum()
814 		start += edit->disk->s;  in cmdadd()
979 writechs(Disk *disk, uchar *p, vlong lba)  in writechs()  argument
983 	s = lba % disk->s;  in writechs()
984 	h = (lba / disk->s) % disk->h;  in writechs()
985 	c = lba / (disk->s * disk->h);  in writechs()
989 		h = disk->h - 1;  in writechs()
990 		s = disk->s - 1;  in writechs()
999 wrtentry(Disk *disk, Tentry *tp, int type, u32int xbase, u32int lba, u32int end)  in wrtentry()  argument
1002 	writechs(disk, &tp->starth, lba);  in wrtentry()
1003 	writechs(disk, &tp->endh, end-1);  in wrtentry()
1015 	Disk *disk;  in wrextend()  local
1018 		*endlba = edit->disk->secs;  in wrextend()
1021 			disk = edit->disk;  in wrextend()
1022 			diskread(disk, &table, Tablesz, mbroffset+startlba, Toffset);  in wrextend()
1030 			if(diskwrite(edit->disk, &table, Tablesz, mbroffset+startlba, Toffset) < 0)  in wrextend()
1042 	disk = edit->disk;  in wrextend()
1043 	diskread(disk, &table, Tablesz, mbroffset+startlba, Toffset);  in wrextend()
1050 	wrtentry(disk, tp, p->type, startlba, startlba+disk->s, p->end*sec2cyl);  in wrextend()
1055 		wrtentry(disk, tp, TypeEXTENDED, xbase, p->end*sec2cyl, *endlba);  in wrextend()
1065 	if(diskwrite(edit->disk, &table, Tablesz, mbroffset+startlba, Toffset) < 0)  in wrextend()
1076 	Disk *disk;  in wrpart()  local
1080 	disk = edit->disk;  in wrpart()
1082 	diskread(disk, &table, Tablesz, mbroffset, Toffset);  in wrpart()
1089 			s = disk->s;  in wrpart()
1094 			wrtentry(disk, tp, p->type, 0, s, p->end*sec2cyl);  in wrpart()
1104 			wrtentry(disk, tp, t, 0, s, endlba);  in wrpart()
1115 	if(diskwrite(disk, &table, Tablesz, mbroffset, Toffset) < 0)  in wrpart()
1123 	if(ctldiff(edit, disk->ctlfd) < 0)  in wrpart()