#!/bin/sh -e

AUTH="'authenticated' => 'yes'"

replace_stream()
{
  sed "s/\('_SESSION_REMOTE_ADDR'\)/$AUTH, \1/"
}

if [ "$1" ];
then
  cd /tmp
  mv "$1" "$1".unauthenticated
  cat "$1".unauthenticated|replace_stream > "$1"
  chown www-data.www-data "$1"
else
  replace_stream
fi