On 10/29/2017 08:05 PM, Gene Heskett wrote:
Which I guess is why I've never noticed a problem other than
whatever creates it always creates it only with root perms. I'm the
only user, no others.
But it was always my understanding that tmp's were cleaned out in
the boot process. And thats not true either after observing stuff
there that was not created during this uptime.
<snippage>
I've never seen it done any other way, on either Linux or Unix. Must
be an oddball distro that someone cobbed together and for some reason
got rid of the security measures on the /tmp directory.
/tmp should be cleared out at reboot. It's only a partition in
memory. Unless it's that weird distro you're using and whoever
created it made it a regular partition on disk. Or, it's been hard
linked to the /var/tmp directory which does not get flushed on reboot.
Two different 'tmp's here, and do not appear to have any matching
contents. From the dates on this machine, /tmp is apparently flushed at
reboot, but /var/tmp has stuff with much older creation dates in it.
Okay, so you do have two different tmp dirs. That's as it should be.
The /tmp should not have persistence across reboots, while the /var/tmp
should.
These are wheezy machines, uptodate a/o last night except for the Sheldon
r-pi3b running jessie, it was updated 2 hours ago.
The install dvd was compiled by our linuxcnc guys, so it installs and
pins, a realtime kernel, and uses the normal debian wheezy set of repo's
except for linuxcnc, I get that straight from the buildbot.linuxcnc.org.
We have a build for jessie on armhf's but stretch on an arm64 isn't
running linuxcnc yet, linuxcnc.org needs someone to donate an arm64
machine to add to the buildbot farm.
I've not managed to cobble together a realtime pre-emptable kernel,
something about a missing header file I think, nor have I succeeded in
making an rpspi.ko module that runs on the rock64. The rock64 is easily
10x faster than the pi, takes only a bit over an hour to make a kernel,
src downloaded from the rtai git repo & that I've not figured out how to
install yet because the rock64 doesn't use grub or lilo to boot, and it
does NOT have that usb-2 pinhole the i/o has to go thru (except for the
spi which is what actually moves the machine).
Wish I could help with this but I have absolutely no experience with
that hardware.
But I've been side tracked by the card failures in the G0704, so haven't
put any time into the rock64 in the last 3 weeks. Between that and
taking care of the missus, I seem to be spread a bit thin. That, and my
giddy up seems to be more reluctant these days. Too many years and miles
on this long pig chassis I guess. :(
Thanks Mark.
Cheers, Gene Heskett
Good luck, and may the Schwartz be wit' ya. ;-)
Mark
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