Re: [Emc-developers] EMC2 for simultaneous 5-axis manufacturing

[Jeff E. <je...@un...>]

On Fri, Oct 05, 2007 at 12:21:12PM +0800, David wrote:
> Jeff wrote:
> > Never run emc2 as root.  Instead, use "sudo make setuid" to make the
> > emc_module_helper program able to load modules, and run it as a "regular
> > user".  For instance, I have been informed that when you run as root,
> > the special device file "/dev/tty" is removed when emc exits; this
> > does not happen when you run as a user.
> 
> If I don't ran EMC2 as root when building EMC2 (realtime) , the
> terminal will show:
> 
>   Can't write to /dev/rtai_shm - aborting

Put the file debian/extras-Ubuntu-6.06/etc/udev/rules.d in
/etc/udev/rules.d -- this makes the /dev/rtai_shm file writable by
non-root users, and is automatically installed with the official emc
packages (but not by 'make install' or for run-in-place systems)

Do the same for .../udev/scripts/rtai_fifos.sh if it exists in your
version of the emc2 source tree; this enables the rtai latency test to
run without manually executing "mknod".

Jeff