On Fri, Aug 9, 2013 at 4:01 AM, Stanislav Vovk <[email protected]> wrote: > Hi, > > Have a few questions regarding lttng configuration in a multi user system. > > In my system there are two users, root and Bob. I am starting sessiond at > boot as root user. And instrumented programs are started as either root or > Bob. I am logged in to the system and controlling lttng as root user. > > - When executing "lttng list -u" I see events registered by programs started > as root. I don't see events from programs started as Bob. Why? Did I forget > something? > > - Now I switch user to Bob in the shell. Executing "lttng list -u" does not > give any output at all, instead a new sessiond is started. How can I have one > sessiond for the whole system?
Hi Stanislav, A non-privileged user can only interact with a root session daemon if he is part of the "tracing" group. Is it the case for "Bob" in this example? Reproducing your scenario here with "Bob" being part of the tracing group: - Root can list its own sessions as well as Bob's - Bob's user space events can also be seen by root - Bob can't see the sessions created by root. Regards, Jérémie > > Cheers, > Stanislav > > _______________________________________________ > lttng-dev mailing list > [email protected] > http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev -- Jérémie Galarneau EfficiOS Inc. http://www.efficios.com _______________________________________________ lttng-dev mailing list [email protected] http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
