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#!/bin/bash

#
# This script is for Ubuntu 20.04 Focal Fossa to download and install XRDP+XORGXRDP via
# source.
#
# Major thanks to: http://c-nergy.be/blog/?p=11336 for the tips.
#

###############################################################################
# Use HWE kernel packages
#
HWE=""
#HWE="-hwe-20.04"

###############################################################################
# Update our machine to the latest code if we need to.
#

if [ "$(id -u)" -ne 0 ]; then
    echo 'This script must be run with root privileges' >&2
    exit 1
fi

apt update && apt upgrade -y

if [ -f /var/run/reboot-required ]; then
    echo "A reboot is required in order to proceed with the install." >&2
    echo "Please reboot and re-run this script to finish the install." >&2
    exit 1
fi

###############################################################################
# XRDP
#

# Install hv_kvp utils
apt install -y linux-tools-virtual${HWE}
apt install -y linux-cloud-tools-virtual${HWE}

# Install the xrdp service so we have the auto start behavior
apt install -y xrdp

systemctl stop xrdp
systemctl stop xrdp-sesman

# Configure the installed XRDP ini files.
# use vsock transport.
sed -i_orig -e 's/port=3389/port=vsock:\/\/-1:3389/g' /etc/xrdp/xrdp.ini
# use rdp security.
sed -i_orig -e 's/security_layer=negotiate/security_layer=rdp/g' /etc/xrdp/xrdp.ini
# remove encryption validation.
sed -i_orig -e 's/crypt_level=high/crypt_level=none/g' /etc/xrdp/xrdp.ini
# disable bitmap compression since its local its much faster
sed -i_orig -e 's/bitmap_compression=true/bitmap_compression=false/g' /etc/xrdp/xrdp.ini

# Add script to setup the ubuntu session properly
if [ ! -e /etc/xrdp/startubuntu.sh ]; then
cat >> /etc/xrdp/startubuntu.sh << EOF
#!/bin/sh
export XDG_CURRENT_DESKTOP=KDE
exec /etc/xrdp/startwm.sh
EOF
chmod a+x /etc/xrdp/startubuntu.sh
fi

# use the script to setup the ubuntu session
sed -i_orig -e 's/startwm/startubuntu/g' /etc/xrdp/sesman.ini

# rename the redirected drives to 'shared-drives'
sed -i -e 's/FuseMountName=thinclient_drives/FuseMountName=shared-drives/g' /etc/xrdp/sesman.ini

# Changed the allowed_users
sed -i_orig -e 's/allowed_users=console/allowed_users=anybody/g' /etc/X11/Xwrapper.config

# Blacklist the vmw module
if [ ! -e /etc/modprobe.d/blacklist_vmw_vsock_vmci_transport.conf ]; then
cat >> /etc/modprobe.d/blacklist_vmw_vsock_vmci_transport.conf <<EOF
blacklist vmw_vsock_vmci_transport
EOF
fi

#Ensure hv_sock gets loaded
if [ ! -e /etc/modules-load.d/hv_sock.conf ]; then
echo "hv_sock" > /etc/modules-load.d/hv_sock.conf
fi

# Configure the policy xrdp session
cat > /etc/polkit-1/localauthority/50-local.d/45-allow-colord.pkla <<EOF
[Allow Colord all Users]
Identity=unix-user:*
Action=org.freedesktop.color-manager.create-device;org.freedesktop.color-manager.create-profile;org.freedesktop.color-manager.delete-device;org.freedesktop.color-manager.delete-profile;org.freedesktop.color-manager.modify-device;org.freedesktop.color-manager.modify-profile
ResultAny=no
ResultInactive=no
ResultActive=yes
EOF

# reconfigure the service
systemctl daemon-reload
systemctl start xrdp

#
# End XRDP
###############################################################################

echo "Install is complete."
echo "Reboot your machine to begin using XRDP."