handler.py 文件源码

def bind_unix_listener(self):
        # http://0pointer.de/blog/projects/systemd.html (search "file
        # descriptor 3")
        try:
            socket_fd = 3
            self.sock = socket.fromfd(socket_fd, socket.AF_UNIX,
                                      socket.SOCK_STREAM)
            self.sock.listen(50)
            return self.sock
        except (TypeError, BlockingIOError, socket.error, ValueError):
            pass
        try:
            self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
            if os.path.exists(MESSAGE_SOCK_PATH):
                os.remove(MESSAGE_SOCK_PATH)
            self.sock.bind(MESSAGE_SOCK_PATH)
            self.sock.listen(50)
            return self.sock
        except Exception as ex:
            exc_type, exc_value, exc_tb = sys.exc_info()
            traceback.print_exception(exc_type, exc_value, exc_tb,
                                      file=sys.stderr)
            raise ex