recovery_backend.py 文件源码

def run_dbus_service(self, timeout=None, send_usr1=False):
        '''Run D-BUS server.

        If no timeout is given, the server will run forever, otherwise it will
        return after the specified number of seconds.

        If send_usr1 is True, this will send a SIGUSR1 to the parent process
        once the server is ready to take requests.
        '''
        dbus.service.Object.__init__(self, self.bus, '/RecoveryMedia')
        self.main_loop = GLib.MainLoop()
        self._timeout = False
        if timeout:
            def _quit():
                """This function is ran at the end of timeout"""
                self.main_loop.quit()
                return True
            GLib.timeout_add(timeout * 1000, _quit)

        # send parent process a signal that we are ready now
        if send_usr1:
            os.kill(os.getppid(), signal.SIGUSR1)

        # run until we time out
        while not self._timeout:
            if timeout:
                self._timeout = True
            self.main_loop.run()