Bluetack blocklist downloader

!/bin/bash
#  This script downloads bluetack blocklists, then merges them.
#
#  For descriptions of each list, see
#  http://www.bluetack.co.uk/forums/index.php?autocom=faq&CODE=02&qid=17
#
#  If using rtorrent with ipfilter enhancement patch from trac located at
#  http://libtorrent.rakshasa.no/ticket/239 ,
#  then remember to add the following 2 lines to your .rtorrent.rc:
#  ip_filter=path/to/ipfilter/blocklist
#  schedule = filter,18:30:00,24:00:00,reload_ip_filter=
#  Remember to change "path/to/ipfilter" above to the same path as below,
#  and then set cron to run this script daily.

#  Edit the following to the desired parent folder for the blocklist.
#  This folder should only be used for this script.
#  Choose either a writable nonexistant path, or an empty existing path.
dir=/path/to/ipfilter

#  This sets the name of the blocklist to "blocklist".
#  Change this if you need it to match your ip_filter= setting.
bl=$dir/blocklist

#  Directory and blocklist check
if [ -d $dir ]; then
  if [ -f $bl ]; then
    echo Blocklist exists.
  else
    touch $bl
    if [ $? = 0 ]; then
      echo Empty blocklist created.
    else
      echo -e "Error creating file.\nPlease repair permissions in $dir.\nExiting."
      exit 0
    fi
  fi
else
  mkdir $dir
  touch $bl
    if [ $? = 0 ]; then
      echo Directory and empty blocklist created.
    else
      echo -e "Error writing to directory.\nPlease repair permissions in parent directory.\nExiting."
      exit 0
    fi
fi

cd $dir

#  Backup current blocklist
mv -f blocklist blocklist.backup
if [ $? = 0 ]
then
  echo Downloading blocklists...
else
  echo -e "Error backing up current blocklist.\nPlease repair permissions in $dir.\nExiting."
  exit 0
fi

#  Uncomment each file you want included in the final blocklist
#
#wget -q -t 3 http://www.bluetack.co.uk/config/ads-trackers-and-bad-pr0n.gz
#wget -q -t 3 http://www.bluetack.co.uk/config/badpeers.gz
wget -q -t 3 http://www.bluetack.co.uk/config/bogon.gz
wget -q -t 3 http://www.bluetack.co.uk/config/dshield.gz
#wget -q -t 3 http://www.bluetack.co.uk/config/edu.gz
#wget -q -t 3 http://www.bluetack.co.uk/config/exclusions.gz
#wget -q -t 3 http://www.bluetack.co.uk/config/fornonlancomputers.gz
#wget -q -t 3 http://www.bluetack.co.uk/config/gnutella.gz
#wget -q -t 3 http://www.bluetack.co.uk/config/hijacked.gz
#wget -q -t 3 http://www.bluetack.co.uk/config/HOSTS.gz
#wget -q -t 3 http://www.bluetack.co.uk/config/iana-multicast.gz
#wget -q -t 3 http://www.bluetack.co.uk/config/iana-private.gz
#wget -q -t 3 http://www.bluetack.co.uk/config/iana-reserved.gz
wget -q -t 3 http://www.bluetack.co.uk/config/level1.gz
wget -q -t 3 http://www.bluetack.co.uk/config/level2.gz
#wget -q -t 3 http://www.bluetack.co.uk/config/level3.gz
wget -q -t 3 http://www.bluetack.co.uk/config/Microsoft.gz
#wget -q -t 3 http://www.bluetack.co.uk/config/proxy.gz
#wget -q -t 3 http://www.bluetack.co.uk/config/rangetest.gz
#wget -q -t 3 http://www.bluetack.co.uk/config/spider.gz
#wget -q -t 3 http://www.bluetack.co.uk/config/spyware.gz
#wget -q -t 3 http://www.bluetack.co.uk/config/webexploit-forumspam.gz

#  Extract blocklists (blocklist.backup is ignored)
gunzip -r $dir

#  Combine blocklists into one file
shopt -s extglob
cat !(blocklist.backup) > blocklist

#  Cleanup individual blocklists
rm !(bl*)

echo Done.

exit 0