Configure SNMP to work on read-only RPi using tempFilePattern

Raspbian Jessie.

How can I configure SNMP to work with a pass command (shell script) on a
read-only disk?  I read that smnp.conf can have a tempFilePattern
specified, but what should I use?  Tried /var/log and it doesn't seem to
work (no such instance exists at this OID).  The SNMP/pass works
perfectly with a RW file system.  Does the Raspberry Pi version of
Jessie even use that variable?

I think the RPi may have been configured with something like the
following.  It's the Pi-Star image for use with MMDVM.

   https://openenergymonitor.org/forum-archive/node/5331.html

Thanks!
--
David
Web: http://www.satsignal.eu

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