#!/bin/sh

usage="Usage: $0 domain-list-file name-server"

# Check for right number of arguments
if [ $# -ne 2 ]; then
  echo $usage
  exit 1
fi

if [ -f $1 ]; then
  # Setup output files
  cat /dev/null > $1.good
  cat /dev/null > $1.bad

  # Test domains
  echo "Testing `wc -l $1 | awk '{print $1}'` domains:"
  for domain in `cat $1`; do
    echo -n "."
    if [[ `dig $domain NS | grep -v "^;" | grep NS | grep $2 | wc -l` -gt 0 ]]; then
      echo $domain >> $1.good
    else
      echo $domain >> $1.bad
    fi
  done
  echo ""
else
  echo "No such file: $1"
  echo $usage
  exit 1
fi

echo "Saved `wc -l $1.good | awk '{print $1}'` \"good\" domains in $1.good"
echo "Saved `wc -l $1.bad | awk '{print $1}'` \"bad\" domains in $1.bad"

exit 0