manager.py 文件源码

def handle_sigchld(self, number, frame):
        """Apparently we need a sigchld handler to make set_wakeup_fd work."""
        for task in self.running:
            if task.proc:
                task.proc.poll()
        # Apparently some UNIX systems automatically reset the SIGCHLD
        # handler to SIG_DFL.  Reset it just in case.
        self.set_sigchld_handler()