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asked 2015-05-12 09:29:25 -0500

panos
43 ●3 ●5 ●10

Hi,

My question is the following:

Suppose I have a list of topics and each topic publishes a message of type messageType.

Is there a command that allows me output the all messageTypes that are currently being published?

I know "rostopic info -topicname" will give me information as well as the message a specific topic outputs. Is there a wildcard like rostopic info * that lets me see all the messages that are currently being published?

Thank you in advance,

Panos.

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answered 2015-05-12 13:52:53 -0500

jarvisschultz

9031 ●58 ●128 ●143 https://www.linkedin.c...

I don't know of a built-in command that does exactly what you want, but you could always combine rostopic outputs using standard command line tools (piping, xargs, etc.).

For example, to get the detailed information about every topic, you could run:

rostopic list |xargs -n 1 rostopic info

Or you could combine with grep:

rostopic list |grep robot |xargs -n 1 rostopic info

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answered 2015-05-13 05:13:47 -0500

gvdhoorn
86574 ●283 ●1432 ●1054 http://cor.tudelft.nl/

If you want to avoid calling command line binaries (which can become tricky depending on the state of your shell / system), you should probably take a look at the ROS Master API. I think especially getTopicTypes(..) and getSystemState(..) should be helpful.

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