On 2/26/13 08:54 , Arvid Brodin wrote: > On 2013-02-26 16:23, Sebastian Kuzminsky wrote: >> On 02/26/2013 01:38 AM, Michael Haberler wrote: >>> sim build: >>> - there is no /proc/rtapi/debug since sim builds dont sport kernel modules >>> and hence no procfs/sysfs entries >>> - the program which runs 'sim RT modules', rtapi_app, currently has no way >>> of setting the RTAPI message level for the simulated RT components. >>> - hence, with userland setting the message level in a usermode component >>> does not apply to any 'simulated RT components' either >>> - if you want more detailed (level<RTAPI_MSG_ERR) RTAPI error messages >>> from an RT component with the userland thread styles, the current method is >>> to add a 'rtapi_set_msg_level()' to rtapi_app_main of the component in >>> question, and recompile (I would love to be corrected on this wart.) >>> - this 'sim build' situation applies to all userland thread styles >>> (xenomai, RT-PREEMPT, Posix). RT components happily print to the 'console' >>> (wherever that output goes), since it's all usermode now. >> >> Standard out and standard error of all linuxcnc processes is captured by >> the linuxcnc starter script and written to a log file in tmp. The >> logfile is given a random name, and removed when linuxcnc exits, both >> these behaviors make it harder than it should be to inspect them. > > Perhaps doing what the X server does is a considerable (and easy) > improvement: place the log file (with a fixed name) in /var/log/ and > rewrite it on each startup.
That would sure be a big improvement over what we have now. But there are difficulties: LinuxCNC runs as a regular user (at least in run-in-place mode, and i think also in when installed via the .debs), and users don't have permission to write directly to /var/log. So we'd need to think about maybe a setuid log helper. Also, in addition to stdout/stderr mentioned above, there are other log mechanisms that write directly to files or to the kernel log. Some way to unify all that would still be needed if we want everything in one place. -- Sebastian Kuzminsky ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
