# Adaway4linux by wb9688
# github.com/wb9688/Adaway4linux

if [ "$(id -u)" != "0" ]; then
   echo "This script must be run as root!" 1>&2
   exit 1
fi

echo "========================"
echo "  Downloading files...  "
echo "========================"
echo
curl "https://adaway.org/hosts.txt" > hosts1.txt
curl "http://winhelp2002.mvps.org/hosts.txt" > hosts2.txt
curl "http://hosts-file.net/ad_servers.txt" > hosts3.txt
curl "http://pgl.yoyo.org/adservers/serverlist.php?hostformat=hosts&showintro=0&mimetype=plaintex"t > hosts4.txt

echo
echo "===================="
echo "  Merging files...  "
echo "===================="
cat hosts1.txt hosts2.txt hosts3.txt hosts4.txt exceptions.txt >> hosts
rm hosts1.txt hosts2.txt hosts3.txt hosts4.txt
sed '/^\#/d' hosts > hosts.tmp
mv hosts.tmp hosts
sed '/^$/d' hosts > hosts.tmp
mv hosts.tmp hosts
sed '/127.0.0.1 localhost/d' hosts > hosts.tmp
mv hosts.tmp hosts
sed '/::1 localhost/d' hosts > hosts.tmp
mv hosts.tmp hosts
sed '/127.0.0.1  localhost/d' hosts > hosts.tmp
mv hosts.tmp hosts
sed '/::1  localhost/d' hosts > hosts.tmp
mv hosts.tmp hosts
sed '/adf\.ly/d' hosts > hosts.tmp
mv hosts.tmp hosts
echo "# This file is automatically generated by Adaway4linux by wb9688" >> hosts_license
echo "# If you run Adaway4linux again this file will be overwritten" >> hosts_license
echo "# # Please add extra lines in a file called extra_lines.txt in the same directory as Adaway4linux" >> hosts_license
echo >> hosts_license
mv hosts hosts.txt

echo
echo "====================================="
echo "  Backing up your old hosts file...  "
echo "====================================="
if [ -f /etc/hosts.bkup ];
then
   cat /etc/hosts.bkup > old_hosts
else
   cp /etc/hosts /etc/hosts.bkup
   cat /etc/hosts.bkup > old_hosts
fi

echo
echo "=========================================="
echo "  Including old hosts file in new one...  "
echo "=========================================="
cat hosts_license >> new_hosts
sed '/^\#/d' old_hosts > hosts.tmp
rm old_hosts
mv hosts.tmp old_hosts
cat old_hosts >> new_hosts
echo >> new_hosts
cat hosts.txt >> new_hosts
rm hosts_license
rm hosts.txt
mv new_hosts hosts

echo
echo "================================"
echo "  Installing new hosts file...  "
echo "================================"
cp hosts /etc/hosts
rm hosts

echo
echo "============="
echo "  Finished!  "
echo "============="