file_systems/fat/dosfs.cpp

173 volume_init(int fd, uint8* buf,
193 	if ((buf[0x1fe] != 0x55 || buf[0x1ff] != 0xaa) && buf[0x15] == 0xf8)
196 	if (!memcmp(buf + 3, "NTFS    ", 8) || !memcmp(buf + 3, "HPFS    ", 8)) {
197 		dprintf("dosfs error: %4.4s, not FAT\n", buf + 3);
202 	vol->bytes_per_sector = read16(buf, 0xb);
210 	vol->sectors_per_cluster = i = buf[0xd];
217 	vol->reserved_sectors = read16(buf, 0xe);
219 	vol->fat_count = buf[0x10];
226 	vol->media_descriptor = buf[0x15];
228 	if (buf[0x15] != 0xf0 && buf[0x15] < 0xf8) {
237 	vol->sectors_per_fat = read16(buf, 0x16);
241 		vol->sectors_per_fat = read32(buf, 0x24);
242 		vol->total_sectors = read32(buf, 0x20);
244 		vol->fsinfo_sector = read16(buf, 0x30);
252 		vol->fat_mirrored = !(buf[0x28] & 0x80);
253 		vol->active_fat = !vol->fat_mirrored ? (buf[0x28] & 0xf) : 0;
260 		vol->root_vnode.cluster = read32(buf, 0x2c);
267 		if (dosfs_read_label(true, buf, vol->vol_label))
277 		vol->root_entries_count = read16(buf, 0x11);
284 		vol->total_sectors = read16(buf, 0x13); // partition size
286 			vol->total_sectors = read32(buf, 0x20);
300 			if (memcmp(buf + 0x0b, bogus_zip_data, sizeof(bogus_zip_data)) == 0
330 		if (dosfs_read_label(false, buf, vol->vol_label))
484 	uint8 buf[512];
561 	if ((err = read_pos(fd, 0, (void *)buf, 512)) != 512) {
566 	vol = volume_init(fd, buf, vol_flags, fs_flags, &geo);
672 	uint8 buf[512];
682 	if (read_pos(fd, 0, buf, 512) != 512)
687 	if ((buf[0x1fe] != 0x55 || buf[0x1ff] != 0xaa) && buf[0x15] == 0xf8)
689 	if (!memcmp(buf + 3, "NTFS    ", 8) || !memcmp(buf + 3, "HPFS    ", 8))
693 	bytes_per_sector = read16(buf, 0xb);
700 	i = buf[0xd];
705 	fatCount = buf[0x10];
710 	if (buf[0x15] != 0xf0 && buf[0x15] < 0xf8)
714 	sectors_per_fat = read16(buf, 0x16);
716 		total_sectors = read32(buf, 0x20);
717 		dosfs_read_label(true, buf, name);
719 		total_sectors = read16(buf, 0x13);
722 			total_sectors = read32(buf, 0x20);
724 		dosfs_read_label(false, buf, name);
730 		vol = volume_init(fd, buf, 0, 0, NULL);
1102 	void *buf, size_t len)