61 	int dosfs;  in checkfilesys()  local
74 	dosfs = open(fname, rdonly ? O_RDONLY : O_RDWR, 0);  in checkfilesys()
75 	if (dosfs < 0 && !rdonly) {  in checkfilesys()
76 		dosfs = open(fname, O_RDONLY, 0);  in checkfilesys()
77 		if (dosfs >= 0)  in checkfilesys()
85 	if (dosfs < 0) {  in checkfilesys()
90 	if (readboot(dosfs, &boot) == FSFATAL) {  in checkfilesys()
91 		close(dosfs);  in checkfilesys()
96 	if (skipclean && preen && checkdirty(dosfs, &boot)) {  in checkfilesys()
115 	mod |= readfat(dosfs, &boot, boot.ValidFat >= 0 ? boot.ValidFat : 0, &fat);  in checkfilesys()
118 		close(dosfs);  in checkfilesys()
126 			mod |= readfat(dosfs, &boot, i, &currentFat);  in checkfilesys()
162 	mod |= handleDirTree(dosfs, &boot, fat);  in checkfilesys()
169 	mod |= checklost(dosfs, &boot, fat);  in checkfilesys()
176 			mod |= writefat(dosfs, &boot, fat, mod & FSFIXFAT);  in checkfilesys()
202 				mod |= writefat(dosfs, &boot, fat, 1);  in checkfilesys()
219 	close(dosfs);  in checkfilesys()