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repository: Fixed a potential infinite loop in recover_segment

This commit is contained in:
Jonas Borgström 2014-02-24 12:59:38 +01:00
parent 88ff981eee
commit c1e1d6e9dd
1 changed files with 9 additions and 1 deletions
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10
attic/repository.py
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@ -258,6 +258,8 @@ class Repository(object):
current_index = None
if transaction_id is None:
transaction_id = self.get_index_transaction_id()
if transaction_id is None:
transaction_id = self.io.get_latest_segment()
segments_transaction_id = self.io.get_segments_transaction_id()
self.get_index(None)
for segment, filename in self.io.segment_iterator():
@ -417,6 +419,12 @@ class LoggedIO(object):
for filename in filenames:
yield int(filename), os.path.join(dirpath, filename)
def get_latest_segment(self):
for segment, filename in self.segment_iterator(reverse=True):
return segment
return None
def get_segments_transaction_id(self):
"""Verify that the transaction id is consistent with the index transaction id
"""
@ -518,7 +526,7 @@ class LoggedIO(object):
fd.write(MAGIC)
while len(data) >= self.header_fmt.size:
crc, size, tag = self.header_fmt.unpack(data[:self.header_fmt.size])
if size > len(data):
if size < self.header_fmt.size or size > len(data):
data = data[1:]
continue
if crc32(data[4:size]) & 0xffffffff != crc: