Python fcntl.FD_CLOEXEC Examples

The following are 30 code examples for showing how to use fcntl.FD_CLOEXEC(). These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example.

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Example 1
Project: cherrypy   Author: cherrypy   File: wspbus.py    License: BSD 3-Clause "New" or "Revised" License 7 votes vote down vote up
def _set_cloexec(self):
        """Set the CLOEXEC flag on all open files (except stdin/out/err).

        If self.max_cloexec_files is an integer (the default), then on
        platforms which support it, it represents the max open files setting
        for the operating system. This function will be called just before
        the process is restarted via os.execv() to prevent open files
        from persisting into the new process.

        Set self.max_cloexec_files to 0 to disable this behavior.
        """
        for fd in range(3, self.max_cloexec_files):  # skip stdin/out/err
            try:
                flags = fcntl.fcntl(fd, fcntl.F_GETFD)
            except IOError:
                continue
            fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC) 
Example 2
Project: qubes-core-admin   Author: QubesOS   File: log.py    License: GNU Lesser General Public License v2.1 6 votes vote down vote up
def get_vm_logger(vmname):
    '''Initialise logging for particular VM name

    :param str vmname: VM's name
    :rtype: :py:class:`logging.Logger`
    '''

    logger = logging.getLogger('vm.' + vmname)
    if logger.handlers:
        return logger
    old_umask = os.umask(0o007)
    try:
        handler = logging.FileHandler(
            os.path.join(LOGPATH, 'vm-{}.log'.format(vmname)))
        fcntl.fcntl(handler.stream.fileno(),
            fcntl.F_SETFD, fcntl.FD_CLOEXEC)
    finally:
        os.umask(old_umask)
    handler.setFormatter(formatter_log)
    logger.addHandler(handler)

    return logger 
Example 3
Project: pykit   Author: bsc-s2   File: daemonize.py    License: MIT License 6 votes vote down vote up
def write_pid_or_exit(self):

        self.pf = open(self.pidfile, 'w+r')
        pf = self.pf

        fd = pf.fileno()
        fcntl.fcntl(fd, fcntl.F_SETFD,
                    fcntl.fcntl(fd, fcntl.F_GETFD, 0)
                    | fcntl.FD_CLOEXEC)

        try:
            pid = os.getpid()
            logger.debug('write pid:' + str(pid))

            pf.truncate(0)
            pf.write(str(pid))
            pf.flush()
        except Exception as e:
            logger.exception('write pid failed.' + repr(e))
            sys.exit(0) 
Example 4
Project: hupper   Author: Pylons   File: ipc.py    License: MIT License 6 votes vote down vote up
def set_inheritable(fd, inheritable):
    # On py34+ we can use os.set_inheritable but < py34 we must polyfill
    # with fcntl and SetHandleInformation
    if hasattr(os, 'get_inheritable'):
        if os.get_inheritable(fd) != inheritable:
            os.set_inheritable(fd, inheritable)

    elif WIN:
        h = get_handle(fd)
        flags = winapi.HANDLE_FLAG_INHERIT if inheritable else 0
        winapi.SetHandleInformation(h, winapi.HANDLE_FLAG_INHERIT, flags)

    else:
        flags = fcntl.fcntl(fd, fcntl.F_GETFD)
        if inheritable:
            new_flags = flags & ~fcntl.FD_CLOEXEC
        else:
            new_flags = flags | fcntl.FD_CLOEXEC
        if new_flags != flags:
            fcntl.fcntl(fd, fcntl.F_SETFD, new_flags) 
Example 5
Project: honeything   Author: omererdem   File: httpserver.py    License: GNU General Public License v3.0 6 votes vote down vote up
def bind(self, port, address=""):
        """Binds this server to the given port on the given IP address.

        To start the server, call start(). If you want to run this server
        in a single process, you can call listen() as a shortcut to the
        sequence of bind() and start() calls.
        """
        assert not self._socket
        self._socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
        flags = fcntl.fcntl(self._socket.fileno(), fcntl.F_GETFD)
        flags |= fcntl.FD_CLOEXEC
        fcntl.fcntl(self._socket.fileno(), fcntl.F_SETFD, flags)
        self._socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        self._socket.setblocking(0)
        self._socket.bind((address, port))
        self._socket.listen(128) 
Example 6
Project: jawfish   Author: war-and-code   File: tempfile.py    License: MIT License 5 votes vote down vote up
def _set_cloexec(fd):
        try:
            flags = _fcntl.fcntl(fd, _fcntl.F_GETFD, 0)
        except OSError:
            pass
        else:
            # flags read successfully, modify
            flags |= _fcntl.FD_CLOEXEC
            _fcntl.fcntl(fd, _fcntl.F_SETFD, flags) 
Example 7
Project: verge3d-blender-addon   Author: Soft8Soft   File: server.py    License: GNU General Public License v3.0 5 votes vote down vote up
def __init__(self, addr, requestHandler=SimpleXMLRPCRequestHandler,
                 logRequests=True, allow_none=False, encoding=None,
                 bind_and_activate=True, use_builtin_types=False):
        self.logRequests = logRequests

        SimpleXMLRPCDispatcher.__init__(self, allow_none, encoding, use_builtin_types)
        socketserver.TCPServer.__init__(self, addr, requestHandler, bind_and_activate)

        # [Bug #1222790] If possible, set close-on-exec flag; if a
        # method spawns a subprocess, the subprocess shouldn't have
        # the listening socket open.
        if fcntl is not None and hasattr(fcntl, 'FD_CLOEXEC'):
            flags = fcntl.fcntl(self.fileno(), fcntl.F_GETFD)
            flags |= fcntl.FD_CLOEXEC
            fcntl.fcntl(self.fileno(), fcntl.F_SETFD, flags) 
Example 8
Project: misp42splunk   Author: remg427   File: server.py    License: GNU Lesser General Public License v3.0 5 votes vote down vote up
def __init__(self, addr, requestHandler=SimpleXMLRPCRequestHandler,
                 logRequests=True, allow_none=False, encoding=None,
                 bind_and_activate=True, use_builtin_types=False):
        self.logRequests = logRequests

        SimpleXMLRPCDispatcher.__init__(self, allow_none, encoding, use_builtin_types)
        socketserver.TCPServer.__init__(self, addr, requestHandler, bind_and_activate)

        # [Bug #1222790] If possible, set close-on-exec flag; if a
        # method spawns a subprocess, the subprocess shouldn't have
        # the listening socket open.
        if fcntl is not None and hasattr(fcntl, 'FD_CLOEXEC'):
            flags = fcntl.fcntl(self.fileno(), fcntl.F_GETFD)
            flags |= fcntl.FD_CLOEXEC
            fcntl.fcntl(self.fileno(), fcntl.F_SETFD, flags) 
Example 9
Project: misp42splunk   Author: remg427   File: server.py    License: GNU Lesser General Public License v3.0 5 votes vote down vote up
def __init__(self, addr, requestHandler=SimpleXMLRPCRequestHandler,
                 logRequests=True, allow_none=False, encoding=None,
                 bind_and_activate=True, use_builtin_types=False):
        self.logRequests = logRequests

        SimpleXMLRPCDispatcher.__init__(self, allow_none, encoding, use_builtin_types)
        socketserver.TCPServer.__init__(self, addr, requestHandler, bind_and_activate)

        # [Bug #1222790] If possible, set close-on-exec flag; if a
        # method spawns a subprocess, the subprocess shouldn't have
        # the listening socket open.
        if fcntl is not None and hasattr(fcntl, 'FD_CLOEXEC'):
            flags = fcntl.fcntl(self.fileno(), fcntl.F_GETFD)
            flags |= fcntl.FD_CLOEXEC
            fcntl.fcntl(self.fileno(), fcntl.F_SETFD, flags) 
Example 10
Project: tornado-zh   Author: tao12345666333   File: posix.py    License: MIT License 5 votes vote down vote up
def set_close_exec(fd):
    flags = fcntl.fcntl(fd, fcntl.F_GETFD)
    fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC) 
Example 11
Project: tornado-zh   Author: tao12345666333   File: posix.py    License: MIT License 5 votes vote down vote up
def set_close_exec(fd):
    flags = fcntl.fcntl(fd, fcntl.F_GETFD)
    fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC) 
Example 12
Project: Pyro5   Author: irmen   File: socketutil.py    License: MIT License 5 votes vote down vote up
def set_noinherit(sock: socket.socket) -> None:
        """Mark the given socket fd as non-inheritable to child processes"""
        fd = sock.fileno()
        flags = fcntl.fcntl(fd, fcntl.F_GETFD)
        fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC) 
Example 13
Project: jbox   Author: jpush   File: util.py    License: MIT License 5 votes vote down vote up
def close_on_exec(fd):
    flags = fcntl.fcntl(fd, fcntl.F_GETFD)
    flags |= fcntl.FD_CLOEXEC
    fcntl.fcntl(fd, fcntl.F_SETFD, flags) 
Example 14
Project: neverendshadowsocks   Author: ntfreedom   File: daemon.py    License: Apache License 2.0 5 votes vote down vote up
def write_pid_file(pid_file, pid):
    import fcntl
    import stat

    try:
        fd = os.open(pid_file, os.O_RDWR | os.O_CREAT,
                     stat.S_IRUSR | stat.S_IWUSR)
    except OSError as e:
        shell.print_exception(e)
        return -1
    flags = fcntl.fcntl(fd, fcntl.F_GETFD)
    assert flags != -1
    flags |= fcntl.FD_CLOEXEC
    r = fcntl.fcntl(fd, fcntl.F_SETFD, flags)
    assert r != -1
    # There is no platform independent way to implement fcntl(fd, F_SETLK, &fl)
    # via fcntl.fcntl. So use lockf instead
    try:
        fcntl.lockf(fd, fcntl.LOCK_EX | fcntl.LOCK_NB, 0, 0, os.SEEK_SET)
    except IOError:
        r = os.read(fd, 32)
        if r:
            logging.error('already started at pid %s' % common.to_str(r))
        else:
            logging.error('already started')
        os.close(fd)
        return -1
    os.ftruncate(fd, 0)
    os.write(fd, common.to_bytes(str(pid)))
    return 0 
Example 15
Project: mishkal   Author: linuxscout   File: subprocess24.py    License: GNU General Public License v3.0 5 votes vote down vote up
def _set_cloexec_flag(self, fd):
            try:
                cloexec_flag = fcntl.FD_CLOEXEC
            except AttributeError:
                cloexec_flag = 1

            old = fcntl.fcntl(fd, fcntl.F_GETFD)
            fcntl.fcntl(fd, fcntl.F_SETFD, old | cloexec_flag) 
Example 16
Project: meddle   Author: glmcdona   File: tempfile.py    License: MIT License 5 votes vote down vote up
def _set_cloexec(fd):
        try:
            flags = _fcntl.fcntl(fd, _fcntl.F_GETFD, 0)
        except IOError:
            pass
        else:
            # flags read successfully, modify
            flags |= _fcntl.FD_CLOEXEC
            _fcntl.fcntl(fd, _fcntl.F_SETFD, flags) 
Example 17
Project: meddle   Author: glmcdona   File: SimpleXMLRPCServer.py    License: MIT License 5 votes vote down vote up
def __init__(self, addr, requestHandler=SimpleXMLRPCRequestHandler,
                 logRequests=True, allow_none=False, encoding=None, bind_and_activate=True):
        self.logRequests = logRequests

        SimpleXMLRPCDispatcher.__init__(self, allow_none, encoding)
        SocketServer.TCPServer.__init__(self, addr, requestHandler, bind_and_activate)

        # [Bug #1222790] If possible, set close-on-exec flag; if a
        # method spawns a subprocess, the subprocess shouldn't have
        # the listening socket open.
        if fcntl is not None and hasattr(fcntl, 'FD_CLOEXEC'):
            flags = fcntl.fcntl(self.fileno(), fcntl.F_GETFD)
            flags |= fcntl.FD_CLOEXEC
            fcntl.fcntl(self.fileno(), fcntl.F_SETFD, flags) 
Example 18
Project: meddle   Author: glmcdona   File: subprocess.py    License: MIT License 5 votes vote down vote up
def _set_cloexec_flag(self, fd, cloexec=True):
            try:
                cloexec_flag = fcntl.FD_CLOEXEC
            except AttributeError:
                cloexec_flag = 1

            old = fcntl.fcntl(fd, fcntl.F_GETFD)
            if cloexec:
                fcntl.fcntl(fd, fcntl.F_SETFD, old | cloexec_flag)
            else:
                fcntl.fcntl(fd, fcntl.F_SETFD, old & ~cloexec_flag) 
Example 19
Project: ironpython2   Author: IronLanguages   File: tempfile.py    License: Apache License 2.0 5 votes vote down vote up
def _set_cloexec(fd):
        try:
            flags = _fcntl.fcntl(fd, _fcntl.F_GETFD, 0)
        except IOError:
            pass
        else:
            # flags read successfully, modify
            flags |= _fcntl.FD_CLOEXEC
            _fcntl.fcntl(fd, _fcntl.F_SETFD, flags) 
Example 20
Project: ironpython2   Author: IronLanguages   File: SimpleXMLRPCServer.py    License: Apache License 2.0 5 votes vote down vote up
def __init__(self, addr, requestHandler=SimpleXMLRPCRequestHandler,
                 logRequests=True, allow_none=False, encoding=None, bind_and_activate=True):
        self.logRequests = logRequests

        SimpleXMLRPCDispatcher.__init__(self, allow_none, encoding)
        SocketServer.TCPServer.__init__(self, addr, requestHandler, bind_and_activate)

        # [Bug #1222790] If possible, set close-on-exec flag; if a
        # method spawns a subprocess, the subprocess shouldn't have
        # the listening socket open.
        if fcntl is not None and hasattr(fcntl, 'FD_CLOEXEC'):
            flags = fcntl.fcntl(self.fileno(), fcntl.F_GETFD)
            flags |= fcntl.FD_CLOEXEC
            fcntl.fcntl(self.fileno(), fcntl.F_SETFD, flags) 
Example 21
Project: ironpython2   Author: IronLanguages   File: subprocess.py    License: Apache License 2.0 5 votes vote down vote up
def _set_cloexec_flag(self, fd, cloexec=True):
            try:
                cloexec_flag = fcntl.FD_CLOEXEC
            except AttributeError:
                cloexec_flag = 1

            old = fcntl.fcntl(fd, fcntl.F_GETFD)
            if cloexec:
                fcntl.fcntl(fd, fcntl.F_SETFD, old | cloexec_flag)
            else:
                fcntl.fcntl(fd, fcntl.F_SETFD, old & ~cloexec_flag) 
Example 22
Project: opendevops   Author: opendevops-cn   File: posix.py    License: GNU General Public License v3.0 5 votes vote down vote up
def set_close_exec(fd: int) -> None:
    flags = fcntl.fcntl(fd, fcntl.F_GETFD)
    fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC) 
Example 23
Project: SalesforceXyTools   Author: exiahuang   File: wsgiserver3.py    License: Apache License 2.0 5 votes vote down vote up
def prevent_socket_inheritance(sock):
        """Mark the given socket fd as non-inheritable (POSIX)."""
        fd = sock.fileno()
        old_flags = fcntl.fcntl(fd, fcntl.F_GETFD)
        fcntl.fcntl(fd, fcntl.F_SETFD, old_flags | fcntl.FD_CLOEXEC) 
Example 24
Project: SalesforceXyTools   Author: exiahuang   File: wsgiserver2.py    License: Apache License 2.0 5 votes vote down vote up
def prevent_socket_inheritance(sock):
        """Mark the given socket fd as non-inheritable (POSIX)."""
        fd = sock.fileno()
        old_flags = fcntl.fcntl(fd, fcntl.F_GETFD)
        fcntl.fcntl(fd, fcntl.F_SETFD, old_flags | fcntl.FD_CLOEXEC) 
Example 25
def _set_cloexec_flag(self, fd):
            try:
                cloexec_flag = fcntl.FD_CLOEXEC
            except AttributeError:
                cloexec_flag = 1

            old = fcntl.fcntl(fd, fcntl.F_GETFD)
            fcntl.fcntl(fd, fcntl.F_SETFD, old | cloexec_flag) 
Example 26
Project: vnpy_crypto   Author: birforce   File: posix.py    License: MIT License 5 votes vote down vote up
def set_close_exec(fd):
    flags = fcntl.fcntl(fd, fcntl.F_GETFD)
    fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC) 
Example 27
Project: vnpy_crypto   Author: birforce   File: pool.py    License: MIT License 5 votes vote down vote up
def _set_non_inheritable_non_atomic(fd):
        """Set the close-on-exec flag on the given file descriptor."""
        flags = fcntl(fd, F_GETFD)
        fcntl(fd, F_SETFD, flags | FD_CLOEXEC) 
Example 28
Project: nightmare   Author: joxeankoret   File: __init__.py    License: GNU General Public License v2.0 5 votes vote down vote up
def prevent_socket_inheritance(sock):
        """Mark the given socket fd as non-inheritable (POSIX)."""
        fd = sock.fileno()
        old_flags = fcntl.fcntl(fd, fcntl.F_GETFD)
        fcntl.fcntl(fd, fcntl.F_SETFD, old_flags | fcntl.FD_CLOEXEC) 
Example 29
Project: Comparative-Annotation-Toolkit   Author: ComparativeGenomicsToolkit   File: pipeline.py    License: Apache License 2.0 5 votes vote down vote up
def __init__(self):
        self.rfd, self.wfd = os.pipe()
        flags = fcntl.fcntl(self.wfd, fcntl.F_GETFD)
        fcntl.fcntl(self.wfd, fcntl.F_SETFD, flags|fcntl.FD_CLOEXEC) 
Example 30
Project: BinderFilter   Author: dxwu   File: tempfile.py    License: MIT License 5 votes vote down vote up
def _set_cloexec(fd):
        try:
            flags = _fcntl.fcntl(fd, _fcntl.F_GETFD, 0)
        except IOError:
            pass
        else:
            # flags read successfully, modify
            flags |= _fcntl.FD_CLOEXEC
            _fcntl.fcntl(fd, _fcntl.F_SETFD, flags)