How to use register_join_hook method in autotest

Best Python code snippet using autotest_python

subcommand.py

Source:subcommand.py

...112        """ Register a function to be called from the child process after113        forking. """114        cls.fork_hooks.append(hook)115    @classmethod116    def register_join_hook(cls, hook):117        """ Register a function to be called when from the child process118        just before the child process terminates (joins to the parent). """119        cls.join_hooks.append(hook)120    def redirect_output(self):121        if self.subdir and logging_manager_object:122            tag = os.path.basename(self.subdir)123            logging_manager_object.tee_redirect_debug_dir(self.debug, tag=tag)124    def fork_start(self):125        sys.stdout.flush()126        sys.stderr.flush()127        r, w = os.pipe()128        self.returncode = None129        self.pid = os.fork()130        if self.pid:                            # I am the parent...

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