def compare(self, filename, fix_local_path, fix_length, sha1, fix_time):
"""Check a fixity entry against the current state of the data in the
filesystem"""
try:
local_path = fix_local_path
if not os.path.exists(fix_local_path):
if self.resolvers is not None:
# use resolvers['binpid2path'] to try to find file
(bin_lid, format) = re.split(r'\.',filename)
hit = resolvers['binpid2path'].resolve(pid=bin_lid,format=format)
if hit is not None:
local_path = hit.value
print 'WARNING on %s: file has been moved to %s' % (fix_local_path, local_path)
else:
raise FixityError('file is missing')
file_stat = os.stat(local_path)
file_length = file_stat.st_size
file_time = file_stat.st_mtime
time_delta = file_time - fix_time
fix_date = iso8601(time.gmtime(fix_time))
file_date = iso8601(time.gmtime(file_time))
if fix_length != file_length:
raise FixityError('file was %d bytes at fix time of %s, but is %d bytes as of %s' % (fix_length, fix_date, file_length, file_date))
if local_path == fix_local_path and time_delta > self.time_threshold:
checksum = sha1_file(local_path)
if checksum != sha1:
raise FixityError('file modified at %s, after fix date of %s' % (file_date, fix_date))
else:
raise FixityError('file touched at %s, after fix date of %s, but checksums match' % (file_date, fix_date))
except KeyboardInterrupt:
raise
except FixityError as e:
print 'FAILED on %s: %s' % (local_path,e)
def compute_fixity(local_path):
"""Compute fixity for a given file"""
filename = os.path.basename(local_path)
length = os.stat(local_path).st_size
fix_time = int(time.time())
sha1 = sha1_file(local_path)
return filename, length, sha1, fix_time
def compute_fixity(self,fast=False):
"""compute fixity, overwriting existing fixity"""
"""requires that local_path is correct"""
self.fix_time = datetime.now()
self.length = os.stat(self.local_path).st_size
self.filename = os.path.basename(self.local_path)
# skip checksumming, because it's slow
if fast:
self.sha1 = CHECKSUM_PLACEHOLDER
else:
self.sha1 = sha1_file(self.local_path)
def fix(self):
"""compute fixity based on pathname"""
now = secs2utcdatetime()
stat = os.stat(self.pathname)
self.length = stat.st_size
self.fix_time = now
self.create_time = secs2utcdatetime(stat.st_ctime)
self.mod_time = secs2utcdatetime(stat.st_mtime)
if self.checksum_type=='md5':
self.checksum = md5_file(self.pathname)
elif self.checksum_type=='sha1':
self.checksum = sha1_file(self.pathname)
def check_fixity(self,fast=False):
status = {
FILE_EXISTS: False,
FILE_LENGTH: False,
FILE_CHECKSUM: False
}
if os.path.exists(self.local_path):
status[FILE_EXISTS] = True
if fast:
sha1 = CHECKSUM_PLACEHOLDER
else:
sha1 = sha1_file(self.local_path)
status[FILE_CHECKSUM] = self.sha1==sha1
status[FILE_LENGTH] = self.length==os.stat(self.local_path).st_size
return status
