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/usr/lib/python3/dist-packages/twisted/internet/

/usr/lib/python3/dist-packages/twisted/internet

Name	Size	Mode	Actions
iocpreactor/	-	0755	rm
test/	-	0755	rm
__pycache__/	-	0755	rm
abstract.py	19295	0644	edit dl rm
address.py	5244	0644	edit dl rm
asyncioreactor.py	11131	0644	edit dl rm
base.py	47392	0644	edit dl rm
cfreactor.py	17499	0644	edit dl rm
default.py	1893	0644	edit dl rm
defer.py	85654	0644	edit dl rm
endpoints.py	77440	0644	edit dl rm
epollreactor.py	8941	0644	edit dl rm
error.py	13482	0644	edit dl rm
fdesc.py	3237	0644	edit dl rm
gireactor.py	4620	0644	edit dl rm
glib2reactor.py	1115	0644	edit dl rm
gtk2reactor.py	3640	0644	edit dl rm
gtk3reactor.py	1527	0644	edit dl rm
inotify.py	14396	0644	edit dl rm
interfaces.py	98048	0644	edit dl rm
kqreactor.py	10818	0644	edit dl rm
main.py	1006	0644	edit dl rm
pollreactor.py	5974	0644	edit dl rm
posixbase.py	27604	0644	edit dl rm
process.py	38516	0644	edit dl rm
protocol.py	27391	0644	edit dl rm
pyuisupport.py	843	0644	edit dl rm
reactor.py	1816	0644	edit dl rm
selectreactor.py	6102	0644	edit dl rm
serialport.py	2272	0644	edit dl rm
ssl.py	8643	0644	edit dl rm
stdio.py	1000	0644	edit dl rm
task.py	33608	0644	edit dl rm
tcp.py	54980	0644	edit dl rm
testing.py	29232	0644	edit dl rm
threads.py	3812	0644	edit dl rm
tksupport.py	1971	0644	edit dl rm
udp.py	18619	0644	edit dl rm
unix.py	22508	0644	edit dl rm
utils.py	8682	0644	edit dl rm
win32eventreactor.py	15266	0644	edit dl rm
wxreactor.py	5315	0644	edit dl rm
wxsupport.py	1305	0644	edit dl rm
_baseprocess.py	2003	0644	edit dl rm
_dumbwin32proc.py	12776	0644	edit dl rm
_glibbase.py	12706	0644	edit dl rm
_idna.py	1422	0644	edit dl rm
_newtls.py	9157	0644	edit dl rm
_pollingfile.py	8791	0644	edit dl rm
_posixserialport.py	2081	0644	edit dl rm
_posixstdio.py	4996	0644	edit dl rm
_producer_helpers.py	3909	0644	edit dl rm
_resolver.py	8465	0644	edit dl rm
_signals.py	2670	0644	edit dl rm
_sslverify.py	72796	0644	edit dl rm
_threadedselect.py	11582	0644	edit dl rm
_win32serialport.py	4914	0644	edit dl rm
_win32stdio.py	3140	0644	edit dl rm
__init__.py	521	0644	edit dl rm

Edit: /usr/lib/python3/dist-packages/twisted/internet/fdesc.py (3237B)

# -*- test-case-name: twisted.test.test_fdesc -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
Utility functions for dealing with POSIX file descriptors.
"""

import errno
import os

try:
    import fcntl as _fcntl
except ImportError:
    fcntl = None
else:
    fcntl = _fcntl

# twisted imports
from twisted.internet.main import CONNECTION_DONE, CONNECTION_LOST

def setNonBlocking(fd):
    """
    Set the file description of the given file descriptor to non-blocking.
    """
    flags = fcntl.fcntl(fd, fcntl.F_GETFL)
    flags = flags | os.O_NONBLOCK
    fcntl.fcntl(fd, fcntl.F_SETFL, flags)

def setBlocking(fd):
    """
    Set the file description of the given file descriptor to blocking.
    """
    flags = fcntl.fcntl(fd, fcntl.F_GETFL)
    flags = flags & ~os.O_NONBLOCK
    fcntl.fcntl(fd, fcntl.F_SETFL, flags)

if fcntl is None:
    # fcntl isn't available on Windows.  By default, handles aren't
    # inherited on Windows, so we can do nothing here.
    _setCloseOnExec = _unsetCloseOnExec = lambda fd: None
else:

def _setCloseOnExec(fd):
        """
        Make a file descriptor close-on-exec.
        """
        flags = fcntl.fcntl(fd, fcntl.F_GETFD)
        flags = flags | fcntl.FD_CLOEXEC
        fcntl.fcntl(fd, fcntl.F_SETFD, flags)

def _unsetCloseOnExec(fd):
        """
        Make a file descriptor close-on-exec.
        """
        flags = fcntl.fcntl(fd, fcntl.F_GETFD)
        flags = flags & ~fcntl.FD_CLOEXEC
        fcntl.fcntl(fd, fcntl.F_SETFD, flags)

def readFromFD(fd, callback):
    """
    Read from file descriptor, calling callback with resulting data.

If successful, call 'callback' with a single argument: the
    resulting data.

Returns same thing FileDescriptor.doRead would: CONNECTION_LOST,
    CONNECTION_DONE, or None.

@type fd: C{int}
    @param fd: non-blocking file descriptor to be read from.
    @param callback: a callable which accepts a single argument. If
    data is read from the file descriptor it will be called with this
    data. Handling exceptions from calling the callback is up to the
    caller.

Note that if the descriptor is still connected but no data is read,
    None will be returned but callback will not be called.

@return: CONNECTION_LOST on error, CONNECTION_DONE when fd is
    closed, otherwise None.
    """
    try:
        output = os.read(fd, 8192)
    except OSError as ioe:
        if ioe.args[0] in (errno.EAGAIN, errno.EINTR):
            return
        else:
            return CONNECTION_LOST
    if not output:
        return CONNECTION_DONE
    callback(output)

def writeToFD(fd, data):
    """
    Write data to file descriptor.

Returns same thing FileDescriptor.writeSomeData would.

@type fd: C{int}
    @param fd: non-blocking file descriptor to be written to.
    @type data: C{str} or C{buffer}
    @param data: bytes to write to fd.

@return: number of bytes written, or CONNECTION_LOST.
    """
    try:
        return os.write(fd, data)
    except OSError as io:
        if io.errno in (errno.EAGAIN, errno.EINTR):
            return 0
        return CONNECTION_LOST

__all__ = ["setNonBlocking", "setBlocking", "readFromFD", "writeToFD"]

cmd: