#!/bin/bash
#
# Copyright (C) 2007-2009 Eric Shubert <ejs@shubes.net>
#
# Unmount a sandbox that uses union file-system
#
###################################################################
# change log
# ----------
# 08/14/09 shubes - changed $UNIONROOT to $OVERLAY
# 04/20/08 shubes - kill whatever processes are using the sandbox
#                   (possibly freshclam, minilogd) before umounting.
#                   Thanks to Kent Busbee <kbusbee@northlakechristian.org>
#                   for this tip.
# 03/22/07 shubes - created
#                   thanks to Justice London <jlondon@lawinfo.com>
#                   for pioneering unionfs usage with qtp-newmodel!
###################################################################
## check and set up the environment
#

a1_initialization(){

# Make sure we're root
if [ "$UID" != "0" ]; then
  echo "$me: Error: You are not root, please su -"
  exit 1
fi

echo "$me $myver"

#Bring in necessarily variables and functions from qtp-config
. qtp-config -s
}

###################################################################
## unmount the sandbox
#
a5_unmount_sandbox(){

# kill any processes that are still using the sandbox
fuser -s -k $SANDBOX

umount $SANDBOX/sys  2>/dev/null
umount $SANDBOX/proc 2>/dev/null

sort -r </etc/mtab | while read word1 word2 word3 word4 word5 word6
do
  if [ "${word1#$OVERLAY}" != "${word1}" ]; then
    umount $word2
  fi
done
}

###################################################################
## check to see if any part of the sandbox is mounted
#
q01_check_mounted(){

mtab_entry=$(grep "^$OVERLAY" /etc/mtab)
return $?
}

###################################################################
## main script execution begins here
#

me=${0##*/}
myver=v0.3.2

a1_initialization

q01_check_mounted

if [ $? != "0" ]; then
  echo "$me: sandbox not mounted"
  exit 0
fi

a5_unmount_sandbox

q01_check_mounted

if [ $? == "0" ]; then
  echo "$me: Error: sandbox still mounted!!!!"
  exit 1
fi

echo "$me: sandbox umounted successfully"
exit 0