#!/bin/sh
# This is <BFO2LSDF.sh>
# ----------------------------------------------------------------------------
# $Id$
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version. 
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
# 
# Copyright (c) 2012 by Daniel Armbruster (BFO Schiltach) 
# 
# Purpose: Backup BFO data to LSDF remotely.
# 
# REVISIONS and CHANGES 
#     05/08/2012   V1.0   Daniel Armbruster
#     10/09/2012   V1.1   set bandwidth limit for rsync
#     05/02/2013   V1.2   print rsync EXIT CODE to log message
# 
# ============================================================================
#

TUN_INTERFACE=tun0
# approx. 80% of 256 kBit/second
BWLIMIT=32
EXCLUDE="--exclude='.lock'"
BFO_BASEDIR=/media/BFO_archive
LSDF_BASEDIR=\
gpi-seis@gpilsdf.gpi.uni-karlsruhe.de:/gpfs/lsdf/gpi/GPI/SEIS/projects/BFO 
# NOTE: If adding an additional data directory an exclude pattern must be added,
# too. Add an empty string if no data has to be excluded.
DATADIRS=('seedlink/' 'SG/UIPC/')
EXCLUDE_PATTERNS=(\
"--exclude-from=/home/csback/csback.config/BFO2LSDF.sl.exclude" '')
#DATADIRS=('SG/UIPC/')
#EXCLUDE_PATTERNS=('')

# programs
IP=/bin/ip
LOGGER=/bin/logger
NETSTAT=/bin/netstat
JNC=/usr/local/bin/jnc
GREP=/usr/bin/grep
RSYNC=/usr/bin/rsync

# logger
LOGINFO="(BFO2LSDF) INFO:"
LOGERROR="(BFO2LSDF) ERROR:"

# check for further active processes
if pidof -x $(basename $0) > /dev/null
then
  for p in $(pidof -x $(basename $0)) 
  do
    if [ $p -ne $$ ]
    then
      ${LOGGER} -i -p user.err "${LOGERROR}  $(basename $0) already running \
with PID $p."
      exit 2
    fi
  done
fi

# establish VPN connection to KIT
${IP} addr show ${TUN_INTERFACE} > /dev/null 2>&1
if [ $? -eq 0 ]
then
  tunIPs=$(${IP} addr show ${TUN_INTERFACE} | ${GREP} -e "inet" | \
    awk '{print $2}')
  ${LOGGER} -i -p user.info "${LOGINFO}  VPN connection already had been \
established using IP ${tunIPs}."
else
# start juniper network client
  ${JNC} --nox kit > /dev/null 2>&1
  if [ $? -ne 0 ]
  then
    ${LOGGER} -i -p user.err "${LOGERROR}  Could not establish VPN \
connection."
    exit 2
  else
    tunIPs=$(${IP} addr show ${TUN_INTERFACE} | ${GREP} -e "inet" | \
      awk '{print $2}')
    ${LOGGER} -i -p user.info "${LOGINFO}  VPN connection successfully \
established using IP ${tunIPs}."
  fi
fi

# keychain related
source $HOME/.keychain/$HOSTNAME-sh

# transfer data
for i in ${!DATADIRS[*]}
do
  # copy data (compressed)
  ${RSYNC} -q -z -a --protocol=29 --bwlimit ${BWLIMIT} ${EXCLUDE} \
    ${EXCLUDE_PATTERNS[$i]} ${BFO_BASEDIR}/${DATADIRS[$i]} \
    ${LSDF_BASEDIR}/${DATADIRS[$i]}

  # write status to logfile
  if [ $? -eq 0 ]
  then
    ${LOGGER} -i -p user.info "${LOGINFO}  Copied data \
'${BFO_BASEDIR}/${DATADIRS[$i]}' successfully to LSDF (rsync EXIT CODE: $?)."
  else
    ${LOGGER} -i -p user.err "${LOGERROR}  While copying data \
'${BFO_BASEDIR}/${DATADIRS[$i]}' to LSDF (rsync EXIT CODE: $?)."
  fi
done

# close VPN connection
${JNC} stop > /dev/null 2>&1
if [ $? -eq 0 ]
then
  ${LOGGER} -i -p user.info "${LOGINFO}  VPN connection successfully closed."
else
  ${LOGGER} -i -p user.err "${LOGERROR}  While closing VNP connection."
fi

# ----- END OF BFO2LSDF.sh -----