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# Copyright 2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file is
# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
# ANY KIND, either express or implied. See the License for the specific
# language governing permissions and limitations under the License.
import errno
import inspect
import os
import socket
import sys
from botocore.compat import six
if sys.platform.startswith('win'):
def rename_file(current_filename, new_filename):
try:
os.remove(new_filename)
except OSError as e:
if not e.errno == errno.ENOENT:
# We only want to a ignore trying to remove
# a file that does not exist. If it fails
# for any other reason we should be propagating
# that exception.
raise
os.rename(current_filename, new_filename)
else:
rename_file = os.rename
def accepts_kwargs(func):
return inspect.getfullargspec(func)[2]
# In python 3, socket.error is OSError, which is too general
# for what we want (i.e FileNotFoundError is a subclass of OSError).
# In python 3, all the socket related errors are in a newly created
# ConnectionError.
SOCKET_ERROR = ConnectionError
MAXINT = None
def seekable(fileobj):
"""Backwards compat function to determine if a fileobj is seekable
:param fileobj: The file-like object to determine if seekable
:returns: True, if seekable. False, otherwise.
"""
# If the fileobj has a seekable attr, try calling the seekable()
# method on it.
if hasattr(fileobj, 'seekable'):
return fileobj.seekable()
# If there is no seekable attr, check if the object can be seeked
# or telled. If it can, try to seek to the current position.
elif hasattr(fileobj, 'seek') and hasattr(fileobj, 'tell'):
try:
fileobj.seek(0, 1)
return True
except OSError:
# If an io related error was thrown then it is not seekable.
return False
# Else, the fileobj is not seekable
return False
def readable(fileobj):
"""Determines whether or not a file-like object is readable.
:param fileobj: The file-like object to determine if readable
:returns: True, if readable. False otherwise.
"""
if hasattr(fileobj, 'readable'):
return fileobj.readable()
return hasattr(fileobj, 'read')
def fallocate(fileobj, size):
if hasattr(os, 'posix_fallocate'):
os.posix_fallocate(fileobj.fileno(), 0, size)
else:
fileobj.truncate(size)
# Import at end of file to avoid circular dependencies
from multiprocessing.managers import BaseManager # noqa: F401,E402