#!/bin/sh
# Run inside the container
# Install everything an Ubuntu 12.04 LXC container needs to run X with
# nvidia proprietary drivers
# Caution: it needs the same version of nvidia driver as the host

set -e
set -x

if [ ! -w / ]
then
    echo "Please run as root."
    exit 1
fi

# See https://www.redhat.com/archives/virt-tools-list/2013-April/msg00187.html
if [ -e $root/proc/1/environ ] &&
    cat $root/proc/1/environ | tr '\000' '\n' | grep -Eiq '^container='; then
    echo Running in lxc
else
    echo "Not running in lxc.  Please start the container first."
    exit 1
fi

if ! test -c /dev/input/mice
then
    # See e.g. https://lists.linuxcontainers.org/pipermail/lxc-users/2011-April/001817.html
    # NVIDIA graphics card devices
    mknod -m 666 /dev/nvidia0 c 195 0
    mknod -m 666 /dev/nvidiactl c 195 255
    # input devices
    mkdir  /dev/input
    chmod 755 /dev/input
    mknod -m 666 /dev/input/mice c 13 63
fi

if ! test -f /usr/lib/xorg/modules/input/kbd_drv.so
then
    apt-get update
    apt-get install -y xinit nvidia-current xserver-xorg-input-kbd xserver-xorg-input-mouse nvidia-settings
    # Extras like glxgears, xrandr, and xclock
    apt-get install -y mesa-utils x11-xserver-utils x11-apps
fi

# See e.g. https://lists.linuxcontainers.org/pipermail/lxc-users/2011-April/001817.html
cat > /usr/share/X11/xorg.conf.d/10-lxc-input.conf <<_EOF_
Section "ServerFlags"
     Option "AutoAddDevices" "False"
EndSection

Section "ServerLayout"
     Identifier     "Desktop"
     InputDevice    "Mouse0" "CorePointer"
     InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "InputDevice"
     Identifier "Keyboard0"
     Driver "kbd"
     Option "XkbLayout" "gb"
EndSection

Section "InputDevice"
     Identifier "Mouse0"
     Driver "mouse"
     Option "Protocol" "auto"
     Option "Device" "/dev/input/mice"
     Option "ZAxisMapping" "4 5 6 7"
EndSection
_EOF_

echo "If you like, test mouse input with 'cat /dev/input/mice' to verify you get garbage when the mouse moves"

echo "Then create ~/.xinitrc containing the line 'exec x-window-manager', and install a window manager (e.g. sudo apt-get install lwm)"

echo "You may need to tell startx you're allowed to run X by changing /etc/X11/Xwrapper.config to say 'anybody' instead of 'console'" 

echo "Then start X with 'startx -- vt9'"

echo "See https://lists.linuxcontainers.org/pipermail/lxc-users/2011-April/001817.html for more tips."