diff options
Diffstat (limited to 'extras/volume_id/volume_id.c')
| -rw-r--r-- | extras/volume_id/volume_id.c | 54 |
1 files changed, 42 insertions, 12 deletions
diff --git a/extras/volume_id/volume_id.c b/extras/volume_id/volume_id.c index e28c730326..3bf7886aaa 100644 --- a/extras/volume_id/volume_id.c +++ b/extras/volume_id/volume_id.c @@ -774,6 +774,8 @@ static int probe_jfs(struct volume_id *id, __u64 off) #define FAT16_MAX 0xfff5 #define FAT_ATTR_VOLUME_ID 0x08 #define FAT_ATTR_DIR 0x10 +#define FAT_ATTR_LONG_NAME 0x0f +#define FAT_ATTR_MASK 0x3f #define FAT_ENTRY_FREE 0xe5 static int probe_vfat(struct volume_id *id, __u64 off) { @@ -859,6 +861,9 @@ static int probe_vfat(struct volume_id *id, __u64 off) /* believe only that's fat, don't trust the version * the cluster_count will tell us */ + if (strncmp(vs->sysid, "NTFS", 4) == 0) + return -1; + if (strncmp(vs->type.fat32.magic, "MSWIN", 5) == 0) goto valid; @@ -956,7 +961,7 @@ valid: dir = (struct vfat_dir_entry*) buf; - for (i = 0; i <= root_dir_entries; i++) { + for (i = 0; i < root_dir_entries; i++) { /* end marker */ if (dir[i].name[0] == 0x00) { dbg("end of dir"); @@ -967,7 +972,15 @@ valid: if (dir[i].name[0] == FAT_ENTRY_FREE) continue; + /* long name */ + if ((dir[i].attr & FAT_ATTR_MASK) == FAT_ATTR_LONG_NAME) + continue; + if ((dir[i].attr & (FAT_ATTR_VOLUME_ID | FAT_ATTR_DIR)) == FAT_ATTR_VOLUME_ID) { + /* labels do not have file data */ + if (dir[i].cluster_high != 0 || dir[i].cluster_low != 0) + continue; + dbg("found ATTR_VOLUME_ID id in root dir"); label = dir[i].name; break; @@ -976,6 +989,10 @@ valid: dbg("skip dir entry"); } + vs = (struct vfat_super_block *) get_buffer(id, off, 0x200); + if (vs == NULL) + return -1; + if (label != NULL && strncmp(label, "NO NAME ", 11) != 0) { set_label_raw(id, label, 11); set_label_string(id, label, 11); @@ -1015,7 +1032,7 @@ fat32: count = buf_size / sizeof(struct vfat_dir_entry); dbg("expected entries 0x%x", count); - for (i = 0; i <= count; i++) { + for (i = 0; i < count; i++) { /* end marker */ if (dir[i].name[0] == 0x00) { dbg("end of dir"); @@ -1026,7 +1043,15 @@ fat32: if (dir[i].name[0] == FAT_ENTRY_FREE) continue; + /* long name */ + if ((dir[i].attr & FAT_ATTR_MASK) == FAT_ATTR_LONG_NAME) + continue; + if ((dir[i].attr & (FAT_ATTR_VOLUME_ID | FAT_ATTR_DIR)) == FAT_ATTR_VOLUME_ID) { + /* labels do not have file data */ + if (dir[i].cluster_high != 0 || dir[i].cluster_low != 0) + continue; + dbg("found ATTR_VOLUME_ID id in root dir"); label = dir[i].name; goto fat32_label; @@ -1050,6 +1075,10 @@ fat32: dbg("reached maximum follow count of root cluster chain, give up"); fat32_label: + vs = (struct vfat_super_block *) get_buffer(id, off, 0x200); + if (vs == NULL) + return -1; + if (label != NULL && strncmp(label, "NO NAME ", 11) != 0) { set_label_raw(id, label, 11); set_label_string(id, label, 11); @@ -1251,10 +1280,14 @@ static int probe_iso9660(struct volume_id *id, __u64 off) return -1; if (strncmp(is->iso.id, "CD001", 5) == 0) { + char root_label[VOLUME_ID_LABEL_SIZE+1]; int vd_offset; int i; int found_svd; + memset(root_label, 0, sizeof(root_label)); + strncpy(root_label, is->iso.volume_id, sizeof(root_label)-1); + found_svd = 0; vd_offset = ISO_VD_OFFSET; for (i = 0; i < ISO_VD_MAX; i++) { @@ -1264,22 +1297,19 @@ static int probe_iso9660(struct volume_id *id, __u64 off) break; if (is->iso.type == ISO_VD_SUPPLEMENTARY) { dbg("found ISO supplementary VD at offset 0x%llx", off + vd_offset); + set_label_raw(id, is->iso.volume_id, 32); + set_label_unicode16(id, is->iso.volume_id, BE, 32); found_svd = 1; break; } vd_offset += ISO_SECTOR_SIZE; } - if (!found_svd) { - is = (union iso_super_block *) - get_buffer(id, off + ISO_SUPERBLOCK_OFFSET, 0x200); - if (is == NULL) - return -1; - set_label_raw(id, is->iso.volume_id, 32); - set_label_string(id, is->iso.volume_id, 32); - } else { - set_label_raw(id, is->iso.volume_id, 32); - set_label_unicode16(id, is->iso.volume_id, BE, 32); + if (!found_svd || + (found_svd && !strncmp(root_label, id->label, 16))) + { + set_label_raw(id, root_label, 32); + set_label_string(id, root_label, 32); } goto found; } |