def main():
parser = YaffsParser.get_argparser()
parser.add_argument("--fraction",
help='The file size of the sampled file as a fraction of the original.',
type=float, default=0.01, dest="sample_fraction")
args = parser.parse_args()
image_size = os.path.getsize(args.imagefile)
#We use ceiling so that we always have at least one block to grab, even
#if the fraction is 0.000000000001
total_num_blocks = image_size / (args.blocksize * (args.chunksize + args.oobsize))
num_blocks = math.ceil(total_num_blocks * args.sample_fraction)
num_blocks = int(num_blocks)
blocks = YaffsParser.extract_ordered_blocks(args.imagefile,
args.chunksize,
args.oobsize,
args.blocksize,
args.tag_offset)
sampled_blocks = random.sample(blocks, num_blocks)
root, ext = os.path.splitext(args.imagefile)
outfile = "%s_sampled_%s%s" % (root, str(args.sample_fraction).replace('.', "d"), ext)
print 'Outfile: %s' % outfile
with open(args.imagefile, 'rb') as f:
with open(outfile, 'wb') as out:
for sblock in sampled_blocks:
f.seek(sblock.chunk_pairs[0][1].offset)
out.write(f.read((args.chunksize + args.oobsize) * args.blocksize))
def main():
"""
Assume we pass this script the image file path as an argument on the
command line.
"""
DEFAULT_ANCHORS = ['contacts2.db']
DEFAULT_CHUNK_SIZES = [1024, 2048, 4096]
DEFAULT_OOB_SIZES = [0, 32, 64, 128]
parser = YaffsParser.get_argparser()
parser.add_argument("--anchors",
help="The filenames to use for anchoring the search. Default: %s" % DEFAULT_ANCHORS,
nargs='*', default=DEFAULT_ANCHORS, dest="anchors")
parser.add_argument("--chunksizes",
help="The chunk sizes to test for. Default: %s" % DEFAULT_CHUNK_SIZES,
nargs='*', default=DEFAULT_CHUNK_SIZES, dest="chunk_sizes", type=int)
parser.add_argument("--oobsizes",
help="The oob sizes to test for. Default: %s" % DEFAULT_OOB_SIZES,
nargs='*', default=DEFAULT_OOB_SIZES, dest="oob_sizes", type=int)
args = parser.parse_args()
print args.imagefile
for anchor in args.anchors:
print 'Scanning for %s' % anchor
scan_file(args.imagefile, anchor, args.chunk_sizes, args.oob_sizes)
pass
def main():
parser = YaffsParser.get_argparser()
args = parser.parse_args()
#read in and order all of the blocks, by reverse order of sequence number
sorted_blocks = YaffsParser.extract_ordered_blocks(args.imagefile,
args.chunksize,
args.oobsize,
args.blocksize,
args.tag_offset)
objects = YaffsParser.extract_objects(sorted_blocks)
current_objects = [o for o in objects if not o.is_deleted]
current_file_objects = []
for obj in current_objects:
#check the object type from the first header chunk.
if len(obj.versions) > 0 and obj.versions[0][0][1].obj_type == 1:
current_file_objects.append(obj)
print "object_id,name,time_diff,expected,actual"
for obj in current_file_objects:
missing = get_missing_chunks_by_version(obj)
for expected, actual, time_diff, name in missing:
if time_diff < 0:
pass
print "%d\t%s\t%s\t%d\t%d" % (obj.object_id, name, time_diff, expected, actual)
def main():
parser = YaffsParser.get_argparser()
args = parser.parse_args()
#read in and order all of the blocks, by reverse order of sequence number
sorted_blocks = YaffsParser.extract_ordered_blocks(args.imagefile,
args.chunksize,
args.oobsize,
args.blocksize,
args.tag_offset)
objects = YaffsParser.extract_objects(sorted_blocks)
current_objects = [o for o in objects if not o.is_deleted]
current_file_objects = []
for obj in current_objects:
#check the object type from the first header chunk.
if len(obj.versions) > 0 and obj.versions[0][0][1].obj_type == 1:
current_file_objects.append(obj)
print "object_id,name,chunk_id,count"
for obj in current_file_objects:
count = 0
name = obj.versions[0][0][1].name
for id in obj.chunkDict:
if id == 0:
continue
if len(obj.chunkDict[id]) > 1:
print "%d\t%s\t%d\t%d" % (obj.object_id, name, id, len(obj.chunkDict[id]))
def main():
parser = YaffsParser.get_argparser()
args = parser.parse_args()
#read in and order all of the blocks
sorted_blocks = YaffsParser.extract_ordered_blocks(args.imagefile,
args.pagesize,
args.oobsize,
args.blocksize,
tag_offset=args.tag_offset)
missing_set = get_missing_block_numbers(sorted_blocks)
def main():
parser = YaffsParser.get_argparser()
args = parser.parse_args()
blocks = YaffsParser.extract_ordered_blocks(args.imagefile,
args.chunksize,
args.oobsize,
args.blocksize,
args.tag_offset)
objects = YaffsParser.extract_objects(blocks)
tuple_set = set()
for object in objects:
for version in object.versions:
tuple_set.add((object.object_id, version[0][1].name))
for tuple in tuple_set:
print tuple
def main():
"""
Assume we pass this scirpt the image file as an argument
"""
DEFAULT_VERSIONS = [0]
parser = YaffsParser.get_argparser()
parser.add_argument("--files",
help="The files to extract.",
nargs='*', dest="files")
parser.add_argument("--versions",
help="The version numbers to extract, 0 is newest, -1 is oldest",
type=int,
default=DEFAULT_VERSIONS,
nargs='*', dest='version_numbers')
args = parser.parse_args()
extract_files(args.imagefile, args.files, args.chunksize,
args.oobsize, args.blocksize, args.tag_offset, args.version_numbers)
def main():
parser = YaffsParser.get_argparser()
args = parser.parse_args()
print args.imagefile, args.chunksize, args.oobsize, args.blocksize, args.tag_offset
print "Script started: ", datetime.datetime.now()
print 'File size: ', os.path.getsize(args.imagefile)
#read in and order all of the blocks, by reverse order of sequence number
sorted_blocks = YaffsParser.extract_ordered_blocks(args.imagefile,
args.chunksize,
args.oobsize,
args.blocksize,
args.tag_offset)
nonerased_blocks = [b for b in sorted_blocks if not b.is_erased]
print '%d blocks' % len(sorted_blocks)
print 'Sequence number range: %d -- %d' \
% (nonerased_blocks[-1].sequence_num, nonerased_blocks[0].sequence_num)
print 'Found %d erased blocks.' % (len(sorted_blocks) - len(nonerased_blocks))
#This can happen if the phone is turned off while writing.
print 'Found %d blocks with mismatched sequence numbers' \
% len([block for block in sorted_blocks if block.possible_parse_error])
missing_seq_nums = summarize_deleted_blocks.get_missing_block_numbers(sorted_blocks)
objects = YaffsParser.extract_objects(sorted_blocks)
print 'Found %d objects' % len(objects)
print 'Found %d objects with a header.' % len([obj for obj in objects if 0 in obj.chunkDict])
print 'Found %d deleted objects.' % len([obj for obj in objects if obj.is_deleted])
recent_pairs = []
total_pairs_count = 0
for block in sorted_blocks:
recent_pairs.extend([(tag, chunk) for tag, chunk in block.chunk_pairs if tag.is_most_recent])
total_pairs_count += len(block.chunk_pairs)
print 'Number of Recent chunks: %d' % len(recent_pairs)
print 'Total number of chunks: %d' % total_pairs_count
print 'Fraction recent: %0.2f' % (float(len(recent_pairs)) / total_pairs_count)
last_time = None
first_time = None
for block in nonerased_blocks:
for tag, chunk in block.chunk_pairs:
if tag.isHeaderTag:
print block.sequence_num
last_time = time.ctime(YaffsHeader(chunk).mtime)
break
if last_time:
break
for x in xrange(len(nonerased_blocks)-1, 0, -1):
block = nonerased_blocks[x]
for y in xrange(len(block.chunk_pairs)-1, 0, -1):
tag, chunk = block.chunk_pairs[y]
if tag.isHeaderTag:
print block.sequence_num
first_time = time.ctime(YaffsHeader(chunk).mtime)
break
if first_time:
break
print 'Oldest object modification: %s' % first_time
print 'Newest object modification: %s' % last_time
