From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel.Thibault@drdc-rddc.gc.ca (Thibault, Daniel) Date: Fri, 31 May 2013 16:39:48 +0000 Subject: [lttng-dev] What is the point of the lttng --group option? Message-ID: <48CF5AC71E61DB46B70D0F388054EFFD12D224CE@VAL-E-02.valcartier.drdc-rddc.gc.ca> In order for a user-level (non-sudoed) lttng command to be handled by the root lttng-sessiond daemon, the stars have to be properly aligned: * The root daemon has to be running * There must not be an lttng-sessiond daemon running for that user (other users' lttng-sessiond daemons are ignored) * The user must belong to the root daemon's group name ('tracing' unless the lttng-sessiond --group option was used to set it to something else) Otherwise the user-level lttng command is handled by the user's local lttng-sessiond daemon (which is spawned if not already running). Specifying the lttng --group makes no difference. Whether you belong to it or not, the success of your non-sudoed root daemon command is decided by the three bullets listed above. So what is this option supposed to be used for? Daniel U. Thibault Protection des syst?mes et contremesures (PSC) | Systems Protection & Countermeasures (SPC) Cyber s?curit? pour les missions essentielles (CME) | Mission Critical Cyber Security (MCCS) R & D pour la d?fense Canada - Valcartier (RDDC Valcartier) | Defence R&D Canada - Valcartier (DRDC Valcartier) 2459 route de la Bravoure Qu?bec QC? G3J 1X5 CANADA Vox?: (418) 844-4000 x4245 Fax?: (418) 844-4538 NAC?: 918V QSDJ Gouvernement du Canada?| Government of Canada