def open(self):
# read boot block
self.boot = BootBlock(self.blkdev)
self.boot.read()
# valid root block?
if self.boot.valid:
# get fs flags
dos_type = self.boot.dos_type
self.is_ffs = DosType.is_ffs(dos_type)
self.is_intl = DosType.is_intl(dos_type)
self.is_dircache = DosType.is_dircache(dos_type)
# read root
self.root = RootBlock(self.blkdev, self.boot.calc_root_blk)
self.root.read()
if self.root.valid:
self.name = FSString(self.root.name)
# build meta info
self.meta_info = RootMetaInfo(self.root.create_ts,
self.root.disk_ts,
self.root.mod_ts)
# create root dir
self.root_dir = ADFSVolDir(self, self.root)
self.root_dir.read()
# create bitmap
self.bitmap = ADFSBitmap(self.root)
self.bitmap.read()
self.valid = True
else:
raise FSError(INVALID_ROOT_BLOCK, block=self.root)
else:
raise FSError(INVALID_BOOT_BLOCK, block=self.boot)
def create(self,
name,
meta_info=None,
dos_type=None,
boot_code=None,
is_ffs=False,
is_intl=False,
is_dircache=False):
# determine dos_type
if dos_type == None:
dos_type = DosType.DOS0
if is_ffs:
dos_type |= DosType.DOS_MASK_FFS
if is_dircache:
dos_type |= DosType.DOS_MASK_DIRCACHE
elif is_intl:
dos_type |= DosType.DOS_MASK_INTL
# update flags
self.is_ffs = DosType.is_ffs(dos_type)
self.is_intl = DosType.is_intl(dos_type)
self.is_dircache = DosType.is_dircache(dos_type)
# convert and check volume name
if not isinstance(name, FSString):
raise ValueError("create's name must be a FSString")
fn = FileName(name, is_intl=self.is_intl)
if not fn.is_valid():
raise FSError(INVALID_VOLUME_NAME, file_name=name, node=self)
# create a boot block
self.boot = BootBlock(self.blkdev)
self.boot.create(dos_type=dos_type, boot_code=boot_code)
self.boot.write()
# create a root block
self.root = RootBlock(self.blkdev, self.boot.calc_root_blk)
if meta_info == None:
meta_info = RootMetaInfo()
meta_info.set_current_as_create_time()
meta_info.set_current_as_mod_time()
meta_info.set_current_as_disk_time()
create_ts = meta_info.get_create_ts()
disk_ts = meta_info.get_disk_ts()
mod_ts = meta_info.get_mod_ts()
self.meta_info = meta_info
self.root.create(name.get_ami_str(), create_ts, disk_ts, mod_ts)
self.name = name
# create bitmap
self.bitmap = ADFSBitmap(self.root)
self.bitmap.create()
self.bitmap.write() # writes root block, too
# create empty root dir
self.root_dir = ADFSVolDir(self, self.root)
self.root_dir.read()
# all ok
self.valid = True
def create(self,
name,
create_time=None,
dos_type=BootBlock.DOS0,
boot_code=None):
# create a boot block
self.boot = BootBlock(self.blkdev)
self.boot.create()
self.boot.write()
# create a root block
self.root = RootBlock(self.blkdev, self.boot.calc_root_blk)
self.root.create(name, create_time)
self.name = name
# create bitmap
self.bitmap = ADFSBitmap(self.root)
self.bitmap.create()
self.bitmap.write() # writes root block, too
# create empty root dir
self.root_dir = ADFSVolDir(self, self.root)
self.root_dir.read()
# all ok
self.valid = True
def open(self):
# read boot block
self.boot = BootBlock(self.blkdev)
self.boot.read()
# valid root block?
if self.boot.valid:
self.is_ffs = self.boot.dos_type > BootBlock.DOS0
# read root
self.root = RootBlock(self.blkdev, self.boot.calc_root_blk)
self.root.read()
if self.root.valid:
self.name = self.root.name
# create root dir
self.root_dir = ADFSVolDir(self, self.root)
self.root_dir.read()
# create bitmap
self.bitmap = ADFSBitmap(self.root)
self.bitmap.read()
self.valid = True
else:
raise FSError(INVALID_ROOT_BLOCK, block=self.root)
else:
raise FSError(INVALID_BOOT_BLOCK, block=self.boot)
