#!/bin/sh
# Haven — revert DNS changes on this Mac. Run with sudo.
networksetup -listallnetworkservices | tail -n +2 | while IFS= read -r service; do
  case "$service" in \**) continue ;; esac
  echo "Resetting: $service"
  networksetup -setdnsservers "$service" "Empty"
done

# Remove the SafeSearch pins, leaving any other hosts entries untouched.
TMP=$(mktemp)
sed '/# BEGIN HAVEN SAFE SEARCH/,/# END HAVEN SAFE SEARCH/d' /etc/hosts > "$TMP"
cat "$TMP" > /etc/hosts
rm -f "$TMP"
dscacheutil -flushcache 2>/dev/null
killall -HUP mDNSResponder 2>/dev/null
echo 'Search and video safety locks removed.'

echo 'Done. This Mac now uses the network default DNS again.'