#!/bin/sh
# Description:  Script for preparing VirtualBox environment Diskless
#               Gets a xml file, reads needed information from it and
#               forwards it into B drive of VirtualBox
#
# Author(s):    see project authors file
#               last changes uhrig, 21/10/2008
# Copyright:    (c) 2003 - 2008 - RZ Universitaet Freiburg
#
# Version:      0.0.1
#
################################################################################

################################################################################
##
## Read needed variables from XML file
##
################################################################################
xml=$1
# todo: change it! We need to mount it like vmware, but it could be the
# same
imgpath="/var/lib/vmware"

# file name of the image
imagename="${imgpath}/$(grep -i "<image_name param=\"" ${xml} | awk -F "\"" '{ print $2 }')"
imagename="${imgpath}/vbox-winxppro_20gb.vdi"

# define name for VirtualBox window. no utf8, perhaps we don't need it any
# more. else change the next two lines
#short_description=$(grep "short_description param=\"" ${xml} | sed -e "s%&.*;%; %g" | awk -F "\"" '{print $2}')
# if ${short_description} not defined use ${image_name}
#short_description=${short_description:-"${image_name}"}
#displayname=${short_description}

# Definition of the client system
#vmostype=$(grep -i "<os param=\"" ${xml} | awk -F "\"" '{ print $2 }')

# Definition of the network kind. we should only need: nat, hostif
network_kind=$(grep -i "<network param=\"" ${xml} | awk -F "\"" '{ print $2 }')
network_kind="nat"
# compatibility to vmware xml's
if [ ${network_kind} = "bridge" ]; then
  network_kind="hostif"
else
  # wrong configuration or nat, hostonly currently not supported, do we
  # really need it?
  network_kind="nat"
fi

################################################################################
##
## Prepare stuff and configure Image
##
################################################################################

# Don't use $HOME/.VirtualBox!
export VBOX_USER_HOME=/tmp/vbox-${USER}-$$
# Current ID, to make sure it won't run into conflicts if started more
# as once at the same time, else delete would make the trick...
ID=$$

# Bind Image to VirtualBox, which won't get changed
VBoxManage registerimage disk ${imagename} -type immutable

# Get ID of VBox Image...
diskuid="$(VBoxManage showvdiinfo ${imagename} |grep UUID|awk '{ print $2; }')"

# Create Image and register it, so we are able to modify and start it
VBoxManage createvm -name "${ID}" -register


################################################################################
##
## Modify VM
##
################################################################################

# Add harddisk
VBoxManage modifyvm "${ID}" -hda ${diskuid}

## check if we have enough free memory
# get memory in MB
totalmem=$(expr $(grep -i "memtotal" /proc/meminfo | awk '{print $2}') / 1024)
# calculate memory for virtualbox
mem=$(expr ${totalmem} / 100 \* 66 / 4 \* 4)
# check memory range
memtest=${totalmem}-128

if [ "${mem}" -lt "128" ] || [ "${mem}" -gt "${totalmem}" ]; then
  echo "\n\n"
  echo "\tYour memory is out of range: ${mem} MB."
  echo "\tMin. 128 MB for host and guest!"
  exit 1
fi
VBoxManage modifyvm "${ID}" -memory ${mem}


## look for cdrom, dvd and add them to the vm config file
for cdrs in /dev/cdrom*; do
  if [ -L ${cdrs} ]; then
    VBoxManage modifyvm "${ID}" -dvd host:${cdrs} 
  fi
done

# Enable hardware virtualization
VBoxManage modifyvm "${ID}" -hwvirtex on

# HDD as boot device
VBoxManage modifyvm "${ID}" -boot1 disk

# Network settings
VBoxManage modifyvm "${ID}" -nic1 ${network_kind}
#VBoxManage modifyvm "${ID}" -nictype1 Am79C970a|aM79c973|82540em
if [ "${network_kind}" = "hostif" ]; then
  VBoxManage modifyvm "${ID}" -hostifdev1 eth0
fi
# Per default each virtual network card is assigned a random address by
# VBox at VM creation, due of this we can be sure that every mac is
# unique
# else we should use
#VBoxManage modifyvm "${ID}" -macaddress1 <mac>

# enable audio
VBoxManage modifyvm "${ID}" -audio oss

#TODO
#VBoxManage modifyvm "${ID}"
#VBoxManage modifyvm "${ID}" ­ostype <ostype>
#VBoxManage modifyvm "${ID}" ­vram <ram>_in_mb_of_virtual_graphic_card>
#VBoxManage modifyvm "${ID}" ­acpi <on|off> # acpi and i/o apic support
#VBoxManage modifyvm "${ID}" ­sata <on|off> # sata or ide
#VBoxManage modifyvm "${ID}" ­dvdpassthrough <on|off> # burn support, unstable
#VBoxManage modifyvm "${ID}" -floppy empty|uuid|filename # yes we need it
#VBoxManage modifyvm "${ID}" -floppy empty|uuid|filename # yes we need it



# adjust volume amixer -q sset Master 28 unmute 2>/dev/null
amixer -q sset PCM 28 unmute 2>/dev/null
amixer -q sset Headphone 28 unmute 2>/dev/null
amixer -q sset Front 0 mute 2>/dev/null


# start created image
VBoxManage startvm "${ID}" -type gui