#!/bin/bash
set -euo pipefail
POLYDIR=$1
USERNAME=$4
chmod 711 "${POLYDIR}"
if [[ "$USERNAME" == "csuser" || "$USERNAME" == "emailcsuser" ]]; then
    [[ -d "/var/.${USERNAME}-home-real" ]] || { echo "ERROR: source dir /var/.${USERNAME}-home-real does not exist" >&2; exit 1; }
    mkdir -p "${POLYDIR}/${USERNAME}"
    mount --bind "/var/.${USERNAME}-home-real" "${POLYDIR}/${USERNAME}"
fi