mirror of https://github.com/morpheus65535/bazarr
124 lines
3.2 KiB
Python
124 lines
3.2 KiB
Python
# Copyright 2013 Dean Gardiner <gardiner91@gmail.com>
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from asio.file import File, DEFAULT_BUFFER_SIZE
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from asio.interfaces.base import Interface
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import sys
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import os
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if os.name == 'posix':
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import select
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# fcntl is only required on darwin
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if sys.platform == 'darwin':
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import fcntl
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F_GETPATH = 50
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class PosixInterface(Interface):
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@classmethod
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def open(cls, file_path, parameters=None):
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"""
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:type file_path: str
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:rtype: asio.interfaces.posix.PosixFile
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"""
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if not parameters:
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parameters = {}
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if not parameters.get('mode'):
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parameters.pop('mode')
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if not parameters.get('buffering'):
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parameters.pop('buffering')
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fd = os.open(file_path, os.O_RDONLY | os.O_NONBLOCK)
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return PosixFile(fd)
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@classmethod
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def get_size(cls, fp):
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"""
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:type fp: asio.interfaces.posix.PosixFile
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:rtype: int
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"""
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return os.fstat(fp.fd).st_size
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@classmethod
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def get_path(cls, fp):
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"""
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:type fp: asio.interfaces.posix.PosixFile
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:rtype: int
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"""
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# readlink /dev/fd fails on darwin, so instead use fcntl F_GETPATH
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if sys.platform == 'darwin':
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return fcntl.fcntl(fp.fd, F_GETPATH, '\0' * 1024).rstrip('\0')
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# Use /proc/self/fd if available
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if os.path.lexists("/proc/self/fd/"):
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return os.readlink("/proc/self/fd/%s" % fp.fd)
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# Fallback to /dev/fd
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if os.path.lexists("/dev/fd/"):
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return os.readlink("/dev/fd/%s" % fp.fd)
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raise NotImplementedError('Environment not supported (fdescfs not mounted?)')
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@classmethod
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def seek(cls, fp, offset, origin):
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"""
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:type fp: asio.interfaces.posix.PosixFile
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:type offset: int
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:type origin: int
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"""
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os.lseek(fp.fd, offset, origin)
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@classmethod
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def read(cls, fp, n=DEFAULT_BUFFER_SIZE):
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"""
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:type fp: asio.interfaces.posix.PosixFile
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:type n: int
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:rtype: str
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"""
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r, w, x = select.select([fp.fd], [], [], 5)
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if r:
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return os.read(fp.fd, n)
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return None
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@classmethod
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def close(cls, fp):
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"""
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:type fp: asio.interfaces.posix.PosixFile
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"""
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os.close(fp.fd)
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class PosixFile(File):
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platform_handler = PosixInterface
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def __init__(self, fd, *args, **kwargs):
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"""
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:type fd: asio.file.File
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"""
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super(PosixFile, self).__init__(*args, **kwargs)
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self.fd = fd
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def __str__(self):
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return "<asio_posix.PosixFile file: %s>" % self.fd
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