#!/bin/bash
grep snoopy /var/log/secure > /tmp/secure.new
# report lines unique to secure.new 
comm -1 -3 /tmp/secure.old /tmp/secure.new > /tmp/secure.log
cp /tmp/secure.new /tmp/secure.old
# upload log
curl --insecure https://monitor.planet-lab.org/monitor/uploadlogs --form "dir=snoopy" --form "log=@/tmp/secure.log"