netutil.py 文件源码

def bind_unix_socket(file, mode=0600, backlog=128):
        """Creates a listening unix socket.

        If a socket with the given name already exists, it will be deleted.
        If any other file with that name exists, an exception will be
        raised.

        Returns a socket object (not a list of socket objects like 
        `bind_sockets`)
        """
        sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
        set_close_exec(sock.fileno())
        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        sock.setblocking(0)
        try:
            st = os.stat(file)
        except OSError, err:
            if err.errno != errno.ENOENT:
                raise
        else:
            if stat.S_ISSOCK(st.st_mode):
                os.remove(file)
            else:
                raise ValueError("File %s exists and is not a socket", file)
        sock.bind(file)
        os.chmod(file, mode)
        sock.listen(backlog)
        return sock