tcp.py 文件源码

def createInternetSocket(self):
        """(internal) Create a non-blocking socket using
        self.addressFamily, self.socketType.
        """
        s = socket.socket(self.addressFamily, self.socketType)
        s.setblocking(0)
        if fcntl and hasattr(fcntl, 'FD_CLOEXEC'):
            old = fcntl.fcntl(s.fileno(), fcntl.F_GETFD)
            fcntl.fcntl(s.fileno(), fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
        return s