OS X version of ipfilter.dat updater

ipfilter-update

#!/bin/bash

url="http://tbg.iblocklist.com/Lists/ipfilter.dat.gz"
tempDirectory="/tmp"
fileDirectory="/usr/local/var/ipfilter"

tgzfile=$(basename $url)
NAME=$(basename $0)

#get local
wget $url -O $tempDirectory/$tgzfile -o /dev/null && \
gunzip $tempDirectory/$tgzfile
if [ $? != 0 ] ; then
 echo "erreur wget & gunzip" 2>&1
 rm $tempDirectory/$tgzfile
 /usr/bin/logger -p local0.err "$NAME: Error: wget & gunzip"
 exit 1
fi
#compare
if [ -e $fileDirectory/$(basename $tgzfile .gz) ] && [ "$(md5 $fileDirectory/$(basename $tgzfile .gz) | awk '{printf $4}')" == "$(md5 $tempDirectory/$(basename $tgzfile .gz) | awk '{printf $4}')" ] ; then
 echo "same hash - no change"
 rm $tempDirectory/$(basename $tgzfile .gz) && \
 /usr/bin/logger -p local0.notice "$NAME: same md5 hash - no change" && \
 exit 0
else
 echo "different hash - update new"
 cp $tempDirectory/$(basename $tgzfile .gz) $fileDirectory/$(basename $tgzfile .gz) && \
 rm $tempDirectory/$(basename $tgzfile .gz) && \
 /usr/bin/logger -p local0.notice "$NAME: success update new ipfilter IP list" && \
 exit 0
fi

echo "erreur" 2>&1
exit 1