#!/bin/bash
#This script is intended to clear lingering DNS. Here is an example of the problems cleared
#[root@ash-sys-pro-imhzone ~]# grep -Rl chases /var/cpanel/users/*
#/var/cpanel/users/system
#[root@ash-sys-pro-imhzone ~]# grep -RH chases /var/cpanel/users/*
#/var/cpanel/users/system:DNS686=tester-domain-chases.com

zone=$1
echo "$zone" | grep -qP '^(([a-zA-Z](-?[a-zA-Z0-9])*)\.)*[a-zA-Z](-?[a-zA-Z0-9])+\.[a-zA-Z]{2,}$' #Validate argument is a domain
result=$?
if [[ $result == 0 ]]
  then
    echo 'Domain found'
  else
    echo 'Valid domain required';
    exit 1
  fi
echo "Executing /scripts/killdns $zone"
/scripts/killdns "$zone"
echo "Killing entry $zone from /etc/userdomains"
sed -i.$(date +%m-%d-%Y) "/^$zone:/d" /etc/userdomains
echo "Killing entry $zone from /var/cpanel/users/*"
shopt -s extglob #required for next line to not have system.bak.bak.bak.bak.bak
sed -i.bak "/DNS[0-9]\+=$zone/d" /var/cpanel/users/!(*.bak)