#! /bin/bash
#
#  /usr/bin/leoclient2-directstart -m <VM> -s <Snapshot> -r <RAM>
#
#  m: Name der lokalen VM
#  s: Name des lokalen Snapshots, ohne wird "wie vorgefunden" verwendet
#  r: RAM in MB
#
#  Version 3 - September 2015

etcdir="/etc/leoclient2/machines"
OPTIND=1

vm=""
S_NAME=""
MACHINENAME=""
MACHINEPATH=""
RAM="1024"

while getopts "m:s:r:" opt; do
    case "$opt" in
    m)  vm=$OPTARG
        ;;
    s)  S_NAME=$OPTARG
        ;;
    r)  RAM=$OPTARG
        ;;
    esac
done

shift $((OPTIND-1))
[ "$1" = "--" ] && shift

for file in "$etcdir"/*.conf; do
  pfad=`cat $file`
  b=$(basename "$pfad")
  if [ "$b" = "$vm" ] ; then
    MACHINENAME=$b
    MACHINEPATH=$pfad
  fi
done

if [ "$MACHINENAME" = "" ] ; then
  echo "ERROR: Die Virtuelle Maschine $vm wurde nicht gefunden!"
  exit 1
fi

sudo /usr/bin/leovirtstarter2 --set-permissions

if [ "$S_NAME" != "" ] ; then
  SNAPSHOTPATH="$MACHINEPATH/snapshot-store/$S_NAME"
  if [ -d "$SNAPSHOTPATH" ]; then
    # Name des aktuellen Snapshots aus der VBox-XML-Dstei ermitteln
    XMLPATH="$MACHINEPATH/defaults/$MACHINENAME.vbox"
    SNAPSHOTNAME=`sed -n 's|.*location="Snapshots\/\([^"]*\).*|\1|p' $XMLPATH`
    # echo $SNAPSHOTNAME
    if [ -f "$SNAPSHOTPATH/$SNAPSHOTNAME.zip" ]; then
      rm -Rf "$MACHINEPATH/Snapshots"/*
      unzip "$SNAPSHOTPATH/$SNAPSHOTNAME.zip" -d "$MACHINEPATH/Snapshots"
      cp -f "$MACHINEPATH/defaults/$MACHINENAME.vbox" "$MACHINEPATH"
      echo "zip"
    elif [ -f "$SNAPSHOTPATH/$SNAPSHOTNAME.ZIP" ]; then
      rm -Rf "$MACHINEPATH/Snapshots"/*
      unzip "$SNAPSHOTPATH/$SNAPSHOTNAME.ZIP" -d "$MACHINEPATH/Snapshots"
      cp -f "$MACHINEPATH/defaults/$MACHINENAME.vbox" "$MACHINEPATH"
    else
      echo "ERROR: Snapshot $S_NAME wurde nicht gefunden!"
      exit 1
    fi
  fi
fi

# Berechtigungen des Snapshots Ueberpruefen

if [ -f "$SNAPSHOTPATH/image.conf" ]; then
  auser=1
  ahost=1
  buser=0
  bhost=0
  HOST=$(hostname)
  ROOM=`groups $HOST | gawk -F" " '{ print $3 }'`
  GROUP=`groups $USER | gawk -F" " '{ print $3 }'`
  # echo  "---$USER---$GROUP---$HOST---$ROOM---"
  IFS="="
  while read -r name value
  do
    liste=${value//\"/}
    # echo "Inhalt von $name ist $liste"
    if [ "$name" == "user" ]; then
      auser=0
      IFS=","
      for u in $liste
        do
          if [ "$USER" == "$u" ]; then
            buser=1
            echo "Berechtigung user gefunden: $u"
          fi
        done
    fi
    if [ "$name" == "group" ]; then
      auser=0
      IFS=","
      for u in $liste
        do
          if [ "$GROUP" == "$u" ]; then
            buser=1
            echo "Berechtigung group gefunden: $u"
          fi
        done
    fi
    if [ "$name" == "host" ]; then
      ahost=0
      IFS=","
      for u in $liste
        do
          if [ "$HOST" == "$u" ]; then
            bhost=1
            echo "Berechtigung host gefunden: $u"
          fi
        done
    fi
    if [ "$name" == "room" ]; then
      ahost=0
      IFS=","
      for u in $liste
        do
          if [ "$ROOM" == "$u" ]; then
            bhost=1
            echo "Berechtigung room gefunden: $u"
          fi
        done
    fi
    IFS="="
  done < "$SNAPSHOTPATH/image.conf"

  if [ $auser = 0 ] && [ $buser = 0 ]; then
    echo "User/Group hat keine Berechtigung -> ABBRUCH"
    exit 1
  fi

  if [ $ahost = 0 ] && [ $bhost = 0 ]; then
    echo "Host/Room hat keine Berechtigung -> ABBRUCH"
    exit 1
  fi
fi

export VBOX_USER_HOME=$MACHINEPATH

/usr/bin/VBoxManage sharedfolder remove "$vm" --name home 
/usr/bin/VBoxManage sharedfolder add "$vm" --name home --hostpath "$HOME/Home_auf_Server"
/usr/bin/VBoxManage modifyvm "$vm" --memory "$RAM"
/usr/bin/VBoxManage startvm "$vm" --type gui

exit 0