Export xauth stuff when switching users

xsu.sh

#!/bin/sh

# Help
usage() {
        echo -e "Usage: $0 <user to switch to>"
}

# Check if we have enough args
if [ $# -ne 1 ]
then
        usage
        exit 1
fi

# User sudo'ing to
sudo_user=$1

# Variables needed
display_name=`sed -e 's/^.*://' -e 's/\.[0-9]*//' <<< $DISPLAY`
auth_entry=`xauth list | grep ":$display_name"`
auth_name=`echo $auth_entry | cut -d' ' -f1`
default_shell=`getent passwd $sudo_user | cut -d: -f7`

# Open new shell with xauth stuff exported
sudo su - $sudo_user --session-command "xauth add $auth_entry; DISPLAY=$DISPLAY $default_shell -; xauth remove $auth_name"