To compute the available spaces (as a percent) of "/tmp", I can use following form:
(apply #'/ (snmp:snmp-get "localhost" (list "hrStorageUsed.33" "hrStorageSize.33")))
711/129011
Opps, this is not "available" space, this is used space, should (- 1 *) the result, or I should check if it's going too high.
--binghe