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#! /bin/bash -
# SJP 16 August 2014
# Monitor my external IP address
cd ~/mail/monitor
# set up logfile
if (test -e data/tmp.*) then
datafile=$(ls data/tmp.*)
newfile=0
else
datafile=`mktemp --tmpdir=data`
newfile=1
fi
ip=$(curl ifconfig.me/ip)
[ ${#ip} = 0 ] && exit 1 # Could also do [ -z $ip ]
dt=$(\date +%Y-%m-%dT%T%:z)
# either write date + IP to new file or compare IPs
# write date and IP address to file but delete if it's a dud
if (test "$newfile" -eq 1) then
echo -e "$dt\t$ip" > $datafile
# [ "$ip" == "Timed out" ] && rm $datafile
else # datafile already exists, so compare
read line < $datafile
oldip=$(echo $line | awk '{print $2 }')
if (test "$ip" != "$oldip") then
. notifynewip.sh
rm $datafile
fi
fi
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