Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.

Is it possible to query if a particular namespace exists?

asked 2011-05-27 04:55:58 -0500

Asomerville
2743 ●74 ●99 ●133 http://www.resquared.com/

I'm attempting to detect 3rd party configuration un-intrusively by checking which namespaces exist.

I suppose I can just check for a specific parameter in said namespace, but that feels a little wrong/less robust than checking for the namespace directly.

edit retag flag offensive close merge delete

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2011-05-27 06:59:25 -0500

kwc
12244 ●54 ●90 ●132 http://kwc.org/

Parameters, topics, services, and nodes can all create namespaces. The only way to robustly check for a namespace is to

Query for the parameter
Parse the result from rosgraph.masterapi.Master.getSystemState()

It would be better, though, I think, for your 3rdparty configuration to more explicitly declare its presence (e.g. via parameter, or topic, or otherwise).

edit flag offensive delete link

add a comment

Question Tools

Stats

Asked: 2011-05-27 04:55:58 -0500

Seen: 567 times

Last updated: May 27 '11

Is it possible to query if a particular namespace exists? edit

1 Answer

Question Tools

Stats

Related questions

Is it possible to query if a particular namespace exists?