#! /bin/sh
#----------------------------------------------------
#shell used to setup the host part (network, cgroup)
#while starting a vzgot Virtual Host
#This shell is called from the vzgot executable
#	vzgot boot cont_name
#
#----------------------------------------------------
#Syntaxe
#vzgot.open VE_name VE_pid [base_dir]
#	VE_name is the container dir name
#	HS_pid is the vzgot container master process
#	VE_pid is the container main process ID as seen
#	by the host
#	base_dir is this application root directory
#	used for devel only.
#----------------------------------------------------
CONTNAME=$1
HSPID=$2
VEPID=$3
BASE=$4
#----------------------------------------------------
if ! [ -f $BASE/etc/vzgot/vzgot_config ] ; then
  echo "Missing vzgot config file"
  exit 1	#trouble trouble
  fi
. $BASE/etc/vzgot/vzgot_config

#specific container configuration override (if needed)
if [ -f $BASE/$VZLIB/vzdir/$CONTNAME/vzgot_config ] ; then
  $BASE/$VZLIB/vzdir/$CONTNAME/vzgot_config
  fi
#----------------------------------------------------
#Using cgroup if available and operational
if [ -f $CGROUP/tasks ] ; then
  ln -nsf $CGROUP/$VEPID $BASE/$VZLIB/vzdir/$CONTNAME/cgroup
  if [ -d $BASE/$VZLIB/vzdir/$CONTNAME/cgroup.d ] ; then
    for c in `ls $BASE/$VZLIB/vzdir/$CONTNAME/cgroup.d`
       do	#setting container limits
       sed 's/#.*//g' $BASE/$VZLIB/vzdir/$CONTNAME/cgroup.d/$c | \
		 grep -v '^[[:space:]]*$' > /tmp/$c.$$
       exec 5< /tmp/$c.$$
       while read -r -u 5 COMMAND
	 do
	 echo $COMMAND > $BASE/$VZLIB/vzdir/$CONTNAME/cgroup/$c
	 done
       exec 5<&-
       rm -fr /tmp/$c.$$
       
       done
    fi
  fi
#----------------------------------------------------
#to be sure to start fresh with veth pair
ip link del To_$HSPID > /dev/null 2>&1
#creation the veth pair.
ip link add name To_$HSPID type veth peer name From_$HSPID
ret=$?
if [ $ret -ne 0 ]; then
  echo "vzgot.init, unable to create veth To_$HSPID/From_$HSPID pair"
  exit $ret
  fi
#activating vteh HOST interface
ifconfig To_$HSPID up
ret=$?
if [ $ret -ne 0 ]; then
  echo "vzgot.init, unable to activate veth HOST part"
  exit $ret
  fi
#linking HOST vteh to bridge
brctl addif $BRIDGENAME To_$HSPID
ret=$?
if [ $ret -ne 0 ]; then
  echo "vzgot.init, unable to link veth HOST part to bridge"
  exit $ret
  fi
#giving the "from" part of the pair to VZ
ip link set From_$HSPID netns $VEPID
if [ $ret -ne 0 ]; then
  echo "vzgot.init, unable to give From_$HSPID veth pair to VZ process"
  exit $ret
  fi
#----------------------------------------------------
#lets prepare all routing
$BASE/$VZLIB/shell/vzgot.net $CONTNAME assign $BASE
#----------------------------------------------------
exit 0