先：
source /opt/tros/local_setup.bash-
然后：-
ros2 launch websocket hobot_websocket_service.launch.py
报错：
sunrise@ubuntu:~$ ros2 launch websocket hobot_websocket_service.launch.py
[INFO] [launch]: All log files can be found below /home/sunrise/.ros/log/2023-05-06-20-54-21-485671-ubuntu-5058
[INFO] [launch]: Default logging verbosity is set to INFO
launch webserver
pwd_path is /home/sunrise
webserver_path is /opt/tros/lib/websocket/webservice
Task exception was never retrieved
future: <Task finished name=‘Task-2’ coro=<LaunchService._process_one_event() done, defined at /opt/tros/lib/python3.8/site-packages/launch/launch_service.py:226> exception=InvalidLaunchFileError(‘py’)>
Traceback (most recent call last):
File “/opt/tros/lib/python3.8/site-packages/launch/launch_description_sources/any_launch_file_utilities.py”, line 53, in get_launch_description_from_any_launch_file
return loader(launch_file_path)
File “/opt/tros/lib/python3.8/site-packages/launch/launch_description_sources/python_launch_file_utilities.py”, line 68, in get_launch_description_from_python_launch_file
return getattr(launch_file_module, ‘generate_launch_description’)()
File “/opt/tros/share/websocket/launch/hobot_websocket_service.launch.py”, line 72, in generate_launch_description
os.chmod(nginx, stat.S_IRWXU)
PermissionError: [Errno 1] Operation not permitted: ‘./sbin/nginx’
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File “/opt/tros/lib/python3.8/site-packages/launch/launch_service.py”, line 228, in _process_one_event
await self.__process_event(next_event)
File “/opt/tros/lib/python3.8/site-packages/launch/launch_service.py”, line 248, in __process_event
visit_all_entities_and_collect_futures(entity, self.__context))
File “/opt/tros/lib/python3.8/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py”, line 45, in visit_all_entities_and_collect_futures
futures_to_return += visit_all_entities_and_collect_futures(sub_entity, context)
File “/opt/tros/lib/python3.8/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py”, line 45, in visit_all_entities_and_collect_futures
futures_to_return += visit_all_entities_and_collect_futures(sub_entity, context)
File “/opt/tros/lib/python3.8/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py”, line 38, in visit_all_entities_and_collect_futures
sub_entities = entity.visit(context)
File “/opt/tros/lib/python3.8/site-packages/launch/action.py”, line 108, in visit
return self.execute(context)
File “/opt/tros/lib/python3.8/site-packages/launch/actions/include_launch_description.py”, line 130, in execute
launch_description = self.__launch_description_source.get_launch_description(context)
File “/opt/tros/lib/python3.8/site-packages/launch/launch_description_source.py”, line 84, in get_launch_description
self._get_launch_description(self.__expanded_location)
File “/opt/tros/lib/python3.8/site-packages/launch/launch_description_sources/any_launch_description_source.py”, line 53, in _get_launch_description
return get_launch_description_from_any_launch_file(location)
File “/opt/tros/lib/python3.8/site-packages/launch/launch_description_sources/any_launch_file_utilities.py”, line 56, in get_launch_description_from_any_launch_file
raise InvalidLaunchFileError(extension, likely_errors=exceptions)
launch.invalid_launch_file_error.InvalidLaunchFileError: Caught exception when trying to load file of format [py]: [Errno 1] Operation not permitted: ‘./sbin/nginx’
sunrise@ubuntu:~$ PermissionError: [Errno 1] Operation not permitted: ‘./sbin/nginx’
如何解决？要不要更新一下那个文档？