def __init__(self, blkdev, min_level, debug=False, progress=None): self.log = Log(min_level) self.debug = debug self.blkdev = blkdev self.dos_type = None self.boot = None self.root = None self.block_scan = None self.progress = progress
def __init__(self, blkdev, min_level, debug=False, progress=None): self.log = Log(min_level) self.debug = debug self.blkdev = blkdev self.dos_type = None self.boot = None self.root = None self.block_scan = None self.progress = progress
class Validator:
"""Validate an AmigaDOS file system"""
def __init__(self, blkdev, min_level, debug=False, progress=None):
self.log = Log(min_level)
self.debug = debug
self.blkdev = blkdev
self.dos_type = None
self.boot = None
self.root = None
self.block_scan = None
self.progress = progress
def scan_boot(self):
"""Step 1: scan boot block.
Returns (True, x) if boot block has a valid dos type.
Returns (x, True) if boot block is bootable
Invalid checksum of the block is tolerated but remarked.
"""
# check boot block
boot = BootBlock(self.blkdev)
boot.read()
if boot.valid:
# dos type is valid
self.boot = boot
self.dos_type = boot.dos_type
# give a warning if checksum is not correct
if not boot.valid_chksum:
self.log.msg(Log.INFO,"invalid boot block checksum",0)
self.log.msg(Log.INFO,"dos type is '%s'" % DosType.get_dos_type_str(self.dos_type))
return (True, boot.valid_chksum)
else:
self.log.msg(Log.ERROR,"invalid boot block dos type",0)
return (False, False)
def scan_root(self):
"""Step 2: scan root block.
Try to determine root block from boot block or guess number.
Returns True if the root block could be decoded.
"""
if self.boot != None:
# retrieve root block number from boot block
root_blk_num = self.boot.got_root_blk
# check root block number
if root_blk_num == 0:
new_root = self.blkdev.num_blocks // 2
self.log.msg(Log.INFO,"Boot contains not Root blk. Using default: %d" % new_root,root_blk_num)
root_blk_num = new_root
elif root_blk_num < self.blkdev.reserved or root_blk_num > self.blkdev.num_blocks:
new_root = self.blkdev.num_blocks // 2
self.log.msg(Log.INFO,"Invalid root block number: given %d using guess %d" % (root_blk_num, new_root),root_blk_num)
root_blk_num = new_root
else:
# guess root block number
root_blk_num = self.blkdev.num_blocks // 2
self.log.msg(Log.INFO,"Guessed root block number",root_blk_num)
# read root block
root = RootBlock(self.blkdev, root_blk_num)
root.read()
if not root.valid:
self.log.msg(Log.INFO,"Root block is not valid -> No file system",root_blk_num)
self.root = None # mode without root
return False
else:
self.root = root
return True
def scan_dir_tree(self):
"""Step 3: scan directory structure
Return false if structure is not healthy"""
self.block_scan = BlockScan(self.blkdev, self.log, self.dos_type)
self.dir_scan = DirScan(self.block_scan, self.log)
ok = self.dir_scan.scan_tree(self.root.blk_num, progress=self.progress)
self.log.msg(Log.INFO,"Scanned %d directories" % len(self.dir_scan.get_all_dir_infos()))
if self.debug:
self.dir_scan.dump()
def scan_files(self):
"""Step 4: scan through all found files"""
self.file_scan = FileScan(self.block_scan, self.log, self.dos_type)
all_files = self.dir_scan.get_all_file_hdr_blk_infos()
self.log.msg(Log.INFO,"Scanning %d files" % len(all_files))
self.file_scan.scan_all_files(all_files, progress=self.progress)
if self.debug:
self.file_scan.dump()
def scan_bitmap(self):
"""Step 5: validate block bitmap"""
self.bitmap_scan = BitmapScan(self.block_scan, self.log)
self.bitmap_scan.scan_bitmap(self.root)
def get_summary(self):
"""Return (errors, warnings) of log"""
num_errors = self.log.get_num_level(Log.ERROR)
num_warns = self.log.get_num_level(Log.WARN)
return (num_errors, num_warns)
class Validator:
"""Validate an AmigaDOS file system"""
def __init__(self, blkdev, min_level, debug=False, progress=None):
self.log = Log(min_level)
self.debug = debug
self.blkdev = blkdev
self.dos_type = None
self.boot = None
self.root = None
self.block_scan = None
self.progress = progress
def scan_boot(self):
"""Step 1: scan boot block.
Returns (True, x) if boot block has a valid dos type.
Returns (x, True) if boot block is bootable
Invalid checksum of the block is tolerated but remarked.
"""
# check boot block
boot = BootBlock(self.blkdev)
boot.read()
if boot.valid:
# dos type is valid
self.boot = boot
self.dos_type = boot.dos_type
# give a warning if checksum is not correct
if not boot.valid_chksum:
self.log.msg(Log.INFO,"invalid boot block checksum",0)
self.log.msg(Log.INFO,"dos type is '%s'" % DosType.get_dos_type_str(self.dos_type))
return (True, boot.valid_chksum)
else:
self.log.msg(Log.ERROR,"invalid boot block dos type",0)
return (False, False)
def scan_root(self):
"""Step 2: scan root block.
Try to determine root block from boot block or guess number.
Returns True if the root block could be decoded.
"""
if self.boot != None:
# retrieve root block number from boot block
root_blk_num = self.boot.got_root_blk
# check root block number
if root_blk_num == 0:
new_root = self.blkdev.num_blocks / 2
self.log.msg(Log.INFO,"Boot contains not Root blk. Using default: %d" % new_root,root_blk_num)
root_blk_num = new_root
elif root_blk_num < self.blkdev.reserved or root_blk_num > self.blkdev.num_blocks:
new_root = self.blkdev.num_blocks / 2
self.log.msg(Log.INFO,"Invalid root block number: given %d using guess %d" % (root_blk_num, new_root),root_blk_num)
root_blk_num = new_root
else:
# guess root block number
root_blk_num = self.blkdev.num_blocks / 2
self.log.msg(Log.INFO,"Guessed root block number",root_blk_num)
# read root block
root = RootBlock(self.blkdev, root_blk_num)
root.read()
if not root.valid:
self.log.msg(Log.INFO,"Root block is not valid -> No file system",root_blk_num)
self.root = None # mode without root
return False
else:
self.root = root
return True
def scan_dir_tree(self):
"""Step 3: scan directory structure
Return false if structure is not healthy"""
self.block_scan = BlockScan(self.blkdev, self.log, self.dos_type)
self.dir_scan = DirScan(self.block_scan, self.log)
ok = self.dir_scan.scan_tree(self.root.blk_num, progress=self.progress)
self.log.msg(Log.INFO,"Scanned %d directories" % len(self.dir_scan.get_all_dir_infos()))
if self.debug:
self.dir_scan.dump()
def scan_files(self):
"""Step 4: scan through all found files"""
self.file_scan = FileScan(self.block_scan, self.log, self.dos_type)
all_files = self.dir_scan.get_all_file_hdr_blk_infos()
self.log.msg(Log.INFO,"Scanning %d files" % len(all_files))
self.file_scan.scan_all_files(all_files, progress=self.progress)
if self.debug:
self.file_scan.dump()
def scan_bitmap(self):
"""Step 5: validate block bitmap"""
self.bitmap_scan = BitmapScan(self.block_scan, self.log)
self.bitmap_scan.scan_bitmap(self.root)
def get_summary(self):
"""Return (errors, warnings) of log"""
num_errors = self.log.get_num_level(Log.ERROR)
num_warns = self.log.get_num_level(Log.WARN)
return (num_errors, num_warns)