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# -*- coding: utf-8 -*-
## --------------------------------------------------------------------
## Amazon S3 manager
##
## Authors : Michal Ludvig <michal@logix.cz> (https://www.logix.cz/michal)
## Florent Viard <florent@sodria.com> (https://www.sodria.com)
## Copyright : TGRMN Software, Sodria SAS and contributors
## License : GPL Version 2
## Website : https://s3tools.org
## --------------------------------------------------------------------
from __future__ import absolute_import
import logging
from .SortedDict import SortedDict
from .Crypto import hash_file_md5
from . import Utils
from . import Config
zero_length_md5 = "d41d8cd98f00b204e9800998ecf8427e"
cfg = Config.Config()
class FileDict(SortedDict):
def __init__(self, mapping = None, ignore_case = True, **kwargs):
SortedDict.__init__(self, mapping = mapping or {}, ignore_case = ignore_case, **kwargs)
self.hardlinks_md5 = dict() # { dev: { inode : {'md5':, 'relative_files':}}}
self.by_md5 = dict() # {md5: set(relative_files)}
def record_md5(self, relative_file, md5):
if not relative_file:
return
if md5 is None:
return
if md5 == zero_length_md5:
return
if md5 not in self.by_md5:
self.by_md5[md5] = relative_file
def find_md5_one(self, md5):
if not md5:
return None
return self.by_md5.get(md5, None)
def get_md5(self, relative_file):
"""returns md5 if it can, or raises IOError if file is unreadable"""
md5 = None
if 'md5' in self[relative_file]:
return self[relative_file]['md5']
md5 = self.get_hardlink_md5(relative_file)
if md5 is None and 'md5' in cfg.sync_checks:
logging.debug(u"doing file I/O to read md5 of %s" % relative_file)
md5 = hash_file_md5(self[relative_file]['full_name'])
self.record_md5(relative_file, md5)
self[relative_file]['md5'] = md5
return md5
def record_hardlink(self, relative_file, dev, inode, md5, size):
if md5 is None:
return
if size == 0:
# don't record 0-length files
return
if dev == 0 or inode == 0:
# Windows
return
if dev not in self.hardlinks_md5:
self.hardlinks_md5[dev] = dict()
if inode not in self.hardlinks_md5[dev]:
self.hardlinks_md5[dev][inode] = md5
def get_hardlink_md5(self, relative_file):
try:
dev = self[relative_file]['dev']
inode = self[relative_file]['inode']
md5 = self.hardlinks_md5[dev][inode]
except KeyError:
md5 = None
return md5