/usr/lib/python2.7/dist-packages/tornado/platform/posix.py is in python-tornado 3.1.1-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 | #!/usr/bin/env python
#
# Copyright 2011 Facebook
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License 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.
"""Posix implementations of platform-specific functionality."""
from __future__ import absolute_import, division, print_function, with_statement
import fcntl
import os
from tornado.platform import interface
def set_close_exec(fd):
flags = fcntl.fcntl(fd, fcntl.F_GETFD)
fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC)
def _set_nonblocking(fd):
flags = fcntl.fcntl(fd, fcntl.F_GETFL)
fcntl.fcntl(fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
class Waker(interface.Waker):
def __init__(self):
r, w = os.pipe()
_set_nonblocking(r)
_set_nonblocking(w)
set_close_exec(r)
set_close_exec(w)
self.reader = os.fdopen(r, "rb", 0)
self.writer = os.fdopen(w, "wb", 0)
def fileno(self):
return self.reader.fileno()
def write_fileno(self):
return self.writer.fileno()
def wake(self):
try:
self.writer.write(b"x")
except IOError:
pass
def consume(self):
try:
while True:
result = self.reader.read()
if not result:
break
except IOError:
pass
def close(self):
self.reader.close()
self.writer.close()
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