lockfile.py 文件源码

def is_locked(self):
        # process is not locked if lock file does not exist
        if not os.path.exists(self.path):
            return False

        # if lock file exists, get pid
        with open(self.path, 'r') as f:
            lock_pid = f.read().strip()

        if not lock_pid:
            return False

        lock_pid = int(lock_pid)

        if psutil.pid_exists(lock_pid):
            return True
        else:
            return False