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show topic list without active node

I mean before I run the ros node, I want know the topic list and services list of the node, how could I do with this case? Thanks

Asked by apanda on 2017-03-19 20:45:45 UTC

Comments

The node could subscribe to any topic (e.g. reading a topic name from a parameter or creating a publisher for a time-dependent name) so I'd say it is impossible to solve your task.

Asked by NEngelhard on 2017-03-20 02:42:26 UTC

@NEngelhard, so how did rqt_publisher work, why it could list all topics before the node running?

Asked by apanda on 2017-03-21 03:19:18 UTC

I do not think that it can do it. Could describe your observations?

Asked by NEngelhard on 2017-03-21 06:03:53 UTC

@Nengelhard my mistake, the rqt_publisher could show the topics because it keep the caches list, because i opened the node before. althought the node is not running, rqt_publisher could show some topics which will not in "rostopic list". Thanks.

Asked by apanda on 2017-03-22 00:46:41 UTC

Answers