64 	.fs_flags = 0,
77 #define FATBLKSZ  0x20000       /* size of block in the FAT cache buffer */
97 			u_char bootsig;		/* Boot signature (0x29) */
112 			u_char bootsig;		/* Boot signature (0x29) */
121 	u_char fsi_leadsig[4];		/* Value 0x41615252 */
123 	u_char fsi_structsig[4];	/* Value 0x61417272 */
127 	u_char fsi_trailsig[4];		/* Value 0xAA550000 */
140 	{".       ", "   ", FA_DIR, {0, 0, {0, 0}, {0, 0}, {0, 0}, {0, 0}},
141 	    {0, 0}, {0x21, 0}, {0, 0}, {0, 0, 0, 0}},
142 	{"..      ", "   ", FA_DIR, {0, 0, {0, 0}, {0, 0}, {0, 0}, {0, 0}},
143 	    {0, 0}, {0x21, 0}, {0, 0}, {0, 0, 0, 0}}
203 	if (io_size != 0) {  in dos_read_fatblk()
206 		if (err != 0) {  in dos_read_fatblk()
212 		memset(fs->fatbuf + io_size, 0, FATBLKSZ - io_size);  in dos_read_fatblk()
215 	return (0);  in dos_read_fatblk()
231 	if (err != 0) {  in dos_mount_impl()
239 	if ((err = ioget(fs, 0, buf, secsz)) ||  in dos_mount_impl()
250 	err = dos_read_fatblk(fs, 0);  in dos_mount_impl()
251 	if (err != 0) {  in dos_mount_impl()
257 	fs->root = dot[0];  in dos_mount_impl()
258 	fs->root.name[0] = ' ';  in dos_mount_impl()
260 		fs->root.clus[0] = fs->rdcl & 0xff;  in dos_mount_impl()
261 		fs->root.clus[1] = (fs->rdcl >> 8) & 0xff;  in dos_mount_impl()
262 		fs->root.dex.h_clus[0] = (fs->rdcl >> 16) & 0xff;  in dos_mount_impl()
263 		fs->root.dex.h_clus[1] = (fs->rdcl >> 24) & 0xff;  in dos_mount_impl()
265 	return (0);  in dos_mount_impl()
276 	errno = 0;  in dos_mount()
285 	if (asprintf(&fs, "%s%s", dev, path) < 0)  in dos_mount()
294 	if (strcmp(f->f_ops->fs_name, "dosfs") == 0) {  in dos_mount()
303 	if (errno != 0) {  in dos_mount()
305 		if (mnt->dos_fd >= 0)  in dos_mount()
324 	return (0);  in dos_unmount()
338 	return (0);  in dos_unmount_impl()
357 		if (strcmp(dev, mnt->dos_dev) == 0)  in dos_open()
399 	return (0);  in dos_open()
413 	int err = 0;  in dos_read()
433 		n = 0;  in dos_read()
449 		if (c != 0)  in dos_read()
454 		if (err != 0)  in dos_read()
458 		off = 0;  in dos_read()
481 		off = 0;  in dos_seek()
494 	if (off < 0 || off > size) {  in dos_seek()
499 	f->c = 0;  in dos_seek()
515 	return (0);  in dos_close()
529 	sb->st_uid = 0;  in dos_stat()
530 	sb->st_gid = 0;  in dos_stat()
533 	return (0);  in dos_stat()
544 	x = 0;  in dos_checksum()
545 	for (i = 0; i < 11; i++) {  in dos_checksum()
548 		x &= 0xff;  in dos_checksum()
563 	x = chk = 0;  in dos_readdir()
566 		x = 0;  in dos_readdir()
572 		if (dd.de.name[0] == 0)  in dos_readdir()
576 		if (dd.de.name[0] == 0xe5)  in dos_readdir()
588 				 * to get the long file name. 0x40 marks the  in dos_readdir()
591 				if (dd.xde.seq & 0x40)  in dos_readdir()
592 					chk = dd.xde.chk;  in dos_readdir()
593 				else if (dd.xde.seq != xdn - 1 ||  in dos_readdir()
594 				    dd.xde.chk != chk)  in dos_readdir()
596 				x = dd.xde.seq & ~0x40;  in dos_readdir()
598 					x = 0;  in dos_readdir()
601 				cp_xdnm(fn, &dd.xde);  in dos_readdir()
615 			x = 0;  in dos_readdir()
619 	d->d_fileno = (dd.de.clus[1] << 8) + dd.de.clus[0];  in dos_readdir()
623 	return (0);  in dos_readdir()
634 	if (bs->bpb.media < 0xf0)  in parsebs()
659 	if (fs->spf != 0) {  in parsebs()
662 		if (fs->dirents == 0)  in parsebs()
666 		if (fs->spf == 0)  in parsebs()
668 		if (bs->bpb.fats == 0 || bs->bpb.fats > 16)  in parsebs()
686 	fs->fatsz = fs->dirents ? fs->xclus < 0xff6 ? 12 : 16 : 32;  in parsebs()
690 	return (0);  in parsebs()
705 	err = 0;  in namede()
710 		if (*path == '\0')  in namede()
713 			s = strchr(path, 0);  in namede()
717 		name[n] = 0;  in namede()
725 	return (0);  in namede()
741 		for (ent = 0; ent < 2; ent++)  in lookup()
744 				return (0);  in lookup()
749 	lsec = 0;  in lookup()
750 	xdn = chk = 0;  in lookup()
759 		for (sec = 0; sec < nsec; sec++) {  in lookup()
763 			for (ent = 0; ent < depsec(fs); ent++) {  in lookup()
766 				if (*dir[ent].de.name != 0xe5) {  in lookup()
769 						x = dir[ent].xde.seq;  in lookup()
770 						if (x & 0x40 || (x + 1 == xdn &&  in lookup()
771 						    dir[ent].xde.chk == chk)) {  in lookup()
772 							if (x & 0x40) {  in lookup()
773 								chk = dir[ent].xde.chk;  in lookup()
774 								x &= ~0x40;  in lookup()
777 								cp_xdnm(lfn, &dir[ent].xde);  in lookup()
800 							return (0);  in lookup()
804 				xdn = 0;  in lookup()
821 cp_xdnm(u_char *lfn, DOS_XDE *xde)  in cp_xdnm()  argument
827 		{offsetof(DOS_XDE, name1), sizeof(xde->name1) / 2},  in cp_xdnm()
828 		{offsetof(DOS_XDE, name2), sizeof(xde->name2) / 2},  in cp_xdnm()
829 		{offsetof(DOS_XDE, name3), sizeof(xde->name3) / 2}  in cp_xdnm()
834 	lfn += 13 * ((xde->seq & ~0x40) - 1);  in cp_xdnm()
835 	for (n = 0; n < 3; n++)  in cp_xdnm()
836 		for (p = (u_char *)xde + ix[n].off, x = ix[n].dim; x;  in cp_xdnm()
843 	if (xde->seq & 0x40)  in cp_xdnm()
844 		*lfn = 0;  in cp_xdnm()
860 		for (i = 0; i <= j; i++)  in cp_sfn()
866 			for (i = 0; i <= j; i++)  in cp_sfn()
870 	*p = 0;  in cp_sfn()
872 		*sfn = 0xe5;  in cp_sfn()
905 	for (n = 0; okclus(fs, c); n++)  in fatcnt()
924 	if (val_in & 0xf0000000)  in fatget()
938 		if (err != 0)  in fatget()
947 		val_out &= 0x0fffffff;  in fatget()
957 			val_out &= 0xfff;  in fatget()
963 	return (0);  in fatget()
972 	return (c > (sz == 12 ? 0xff7U : sz == 16 ? 0xfff7U : 0xffffff7));  in fatend()
993 		if (err != 0)  in ioread()
1007 	if (n != 0) {  in ioread()
1009 		if (err != 0)  in ioread()
1013 	return (0);  in ioread()
1028 	rsize = 0;  in ioget()
1033 	if ((rv == 0) && (size != rsize))  in ioget()