How to enable access for specific folder and subdomain in webfaction

gistfile1.sh

#!/bin/bash

wrong_input () {
  echo "Usage:  sh access.sh secondary_username application [-ln]"
  echo "        -ln: creates an application's symbolic link in the secondary_username home folder."
  exit 1;
}

if [ $# -lt 2 ]; then
  wrong_input
fi

setfacl -m u:$1:--x $HOME
setfacl -m u:$1:--- $HOME/webapps/*
setfacl -R -m u:$1:rwx $HOME/webapps/$2
setfacl -R -m d:u:$1:rwx $HOME/webapps/$2
chmod g+s $HOME/webapps/$2
setfacl -R -m d:u:$USER:rwx $HOME/webapps/$2

if [ $# -gt 2 ]; then
  if [ $3 = "-ln" ]; then
    USER=$USER
    echo "Insert secondary_username ($1) password."
    su - $1 -c "ln -s /home/$USER/webapps/$2 ~/$2"
  else
    wrong_input
  fi
fi