/usr/lib/python2.7/dist-packages/eventlet/greenio/py2.py is in python-eventlet 0.20.0-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import os
from eventlet.greenio.base import (
_operation_on_closed_file,
greenpipe_doc,
set_nonblocking,
socket,
SOCKET_BLOCKING,
)
from eventlet.hubs import trampoline, notify_close, notify_opened, IOClosed
from eventlet.support import get_errno, six
__all__ = ['_fileobject', 'GreenPipe']
_fileobject = socket._fileobject
class GreenPipe(_fileobject):
__doc__ = greenpipe_doc
def __init__(self, f, mode='r', bufsize=-1):
if not isinstance(f, six.string_types + (int, file)):
raise TypeError('f(ile) should be int, str, unicode or file, not %r' % f)
if isinstance(f, six.string_types):
f = open(f, mode, 0)
if isinstance(f, int):
fileno = f
self._name = "<fd:%d>" % fileno
else:
fileno = os.dup(f.fileno())
self._name = f.name
if f.mode != mode:
raise ValueError('file.mode %r does not match mode parameter %r' % (f.mode, mode))
self._name = f.name
f.close()
super(GreenPipe, self).__init__(_SocketDuckForFd(fileno), mode, bufsize)
set_nonblocking(self)
self.softspace = 0
@property
def name(self):
return self._name
def __repr__(self):
return "<%s %s %r, mode %r at 0x%x>" % (
self.closed and 'closed' or 'open',
self.__class__.__name__,
self.name,
self.mode,
(id(self) < 0) and (sys.maxint + id(self)) or id(self))
def close(self):
super(GreenPipe, self).close()
for method in [
'fileno', 'flush', 'isatty', 'next', 'read', 'readinto',
'readline', 'readlines', 'seek', 'tell', 'truncate',
'write', 'xreadlines', '__iter__', '__next__', 'writelines']:
setattr(self, method, _operation_on_closed_file)
def __enter__(self):
return self
def __exit__(self, *args):
self.close()
def _get_readahead_len(self):
return len(self._rbuf.getvalue())
def _clear_readahead_buf(self):
len = self._get_readahead_len()
if len > 0:
self.read(len)
def tell(self):
self.flush()
try:
return os.lseek(self.fileno(), 0, 1) - self._get_readahead_len()
except OSError as e:
raise IOError(*e.args)
def seek(self, offset, whence=0):
self.flush()
if whence == 1 and offset == 0: # tell synonym
return self.tell()
if whence == 1: # adjust offset by what is read ahead
offset -= self._get_readahead_len()
try:
rv = os.lseek(self.fileno(), offset, whence)
except OSError as e:
raise IOError(*e.args)
else:
self._clear_readahead_buf()
return rv
if getattr(file, "truncate", None): # not all OSes implement truncate
def truncate(self, size=-1):
self.flush()
if size == -1:
size = self.tell()
try:
rv = os.ftruncate(self.fileno(), size)
except OSError as e:
raise IOError(*e.args)
else:
self.seek(size) # move position&clear buffer
return rv
def isatty(self):
try:
return os.isatty(self.fileno())
except OSError as e:
raise IOError(*e.args)
class _SocketDuckForFd(object):
"""Class implementing all socket method used by _fileobject
in cooperative manner using low level os I/O calls.
"""
_refcount = 0
def __init__(self, fileno):
self._fileno = fileno
notify_opened(fileno)
self._closed = False
def _trampoline(self, fd, read=False, write=False, timeout=None, timeout_exc=None):
if self._closed:
# Don't trampoline if we're already closed.
raise IOClosed()
try:
return trampoline(fd, read=read, write=write, timeout=timeout,
timeout_exc=timeout_exc,
mark_as_closed=self._mark_as_closed)
except IOClosed:
# Our fileno has been obsoleted. Defang ourselves to
# prevent spurious closes.
self._mark_as_closed()
raise
def _mark_as_closed(self):
current = self._closed
self._closed = True
return current
@property
def _sock(self):
return self
def fileno(self):
return self._fileno
def recv(self, buflen):
while True:
try:
data = os.read(self._fileno, buflen)
return data
except OSError as e:
if get_errno(e) not in SOCKET_BLOCKING:
raise IOError(*e.args)
self._trampoline(self, read=True)
def recv_into(self, buf, nbytes=0, flags=0):
if nbytes == 0:
nbytes = len(buf)
data = self.recv(nbytes)
buf[:nbytes] = data
return len(data)
def send(self, data):
while True:
try:
return os.write(self._fileno, data)
except OSError as e:
if get_errno(e) not in SOCKET_BLOCKING:
raise IOError(*e.args)
else:
trampoline(self, write=True)
def sendall(self, data):
len_data = len(data)
os_write = os.write
fileno = self._fileno
try:
total_sent = os_write(fileno, data)
except OSError as e:
if get_errno(e) != errno.EAGAIN:
raise IOError(*e.args)
total_sent = 0
while total_sent < len_data:
self._trampoline(self, write=True)
try:
total_sent += os_write(fileno, data[total_sent:])
except OSError as e:
if get_errno(e) != errno. EAGAIN:
raise IOError(*e.args)
def __del__(self):
self._close()
def _close(self):
was_closed = self._mark_as_closed()
if was_closed:
return
notify_close(self._fileno)
try:
os.close(self._fileno)
except:
# os.close may fail if __init__ didn't complete
# (i.e file dscriptor passed to popen was invalid
pass
def __repr__(self):
return "%s:%d" % (self.__class__.__name__, self._fileno)
def _reuse(self):
self._refcount += 1
def _drop(self):
self._refcount -= 1
if self._refcount == 0:
self._close()
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