def _FingerprintFile(filename):
"""Compute the fingerprint of a file.
If the file does not exist, a None will be returned
instead.
@type filename: str
@param filename: the filename to checksum
@rtype: str
@return: the hex digest of the sha checksum of the contents
of the file
"""
if not (os.path.exists(filename) and os.path.isfile(filename)):
return None
f = open(filename)
fp = compat.sha1_hash()
while True:
data = f.read(4096)
if not data:
break
fp.update(data)
return fp.hexdigest()
def _FingerprintFile(filename):
"""Compute the fingerprint of a file.
If the file does not exist, a None will be returned
instead.
@type filename: str
@param filename: the filename to checksum
@rtype: str
@return: the hex digest of the sha checksum of the contents
of the file
"""
if not (os.path.exists(filename) and os.path.isfile(filename)):
return None
f = open(filename)
fp = compat.sha1_hash()
while True:
data = f.read(4096)
if not data:
break
fp.update(data)
return fp.hexdigest()
def _GetInstDiskMagic(base, instance_name, index): """Computes the magic value for a disk export or import. @type base: string @param base: Random seed value (can be the same for all disks of a transfer) @type instance_name: string @param instance_name: Name of instance @type index: number @param index: Disk index """ h = compat.sha1_hash() h.update(str(constants.RIE_VERSION)) h.update(base) h.update(instance_name) h.update(str(index)) return h.hexdigest()
def _GetInstDiskMagic(base, instance_name, index): """Computes the magic value for a disk export or import. @type base: string @param base: Random seed value (can be the same for all disks of a transfer) @type instance_name: string @param instance_name: Name of instance @type index: number @param index: Disk index """ h = compat.sha1_hash() h.update(str(constants.RIE_VERSION)) h.update(base) h.update(instance_name) h.update(str(index)) return h.hexdigest()