#!/bin/sh
#
# Script to export files
# Parameters:
#  $1: password used to encrypt the file
#  $2: name of zipped file
#  $3: path to files to backup
#  $4: temporary path to store the zipped file

# Configuration
EXPORTER=/home/tool/bin/7za

# check exporter
if [ ! -e $EXPORTER ]; then
  echo "Exporter not found" >&2
  exit 1
fi

# param1 password check
if [ $#  -eq 0 ]; then
  echo "Password required" >&2
  exit 1
fi

PWD=$1

if [ "$PWD" = "" ]; then
  echo "No empty password" >&2
  exit 1
fi

# param2 export (zipped) file name
if [ $#  -eq 1 ]; then
  echo "Export file name required" >&2
  exit 1
fi

EXPORTFNAME=$2

if [ "$EXPORTFNAME" = "" ]; then
  echo "Empty export file name given" >&2
  exit 1
fi

# param3 the path to file name
if [ $#  -eq 2 ]; then
  echo "full target program file name required" >&2
  exit 1
fi

FILE_LIST=$3

# param4 the temporary path to save the zipped file
if [ $#  -eq 3 ]; then
  # use SD card
  logger -p user.info "log_exporter.sh use SD card"
  # check SD
  BLOCK_LIST=$(find /sys/class/block/mmcblk* -maxdepth 0 2>/dev/null)
  if [ ! $? -eq 0 ]; then
    echo "No SD card" >&2
    logger -p user.err "log_exporter.sh no SD card found"
    exit 1
  fi

  # get SD mount path
  PART_LIST=$(find /sys/class/block/mmcblk*p* -maxdepth 0 2>/dev/null)
  if [ ! $? -eq 0 ]; then
    # No partitions
    DEV_PATH=$(find /sys/class/block/mmcblk* -maxdepth 0 | head -n 1)
  else
    # Partitions. get the first
    DEV_PATH=$(find /sys/class/block/mmcblk*p* -maxdepth 0 | head -n 1)
  fi
  SD_PATH=/mnt/mmc/$(basename $DEV_PATH)
  if [ ! -e $SD_PATH ];then
    echo "SD card not mounted" >&2
    logger -p user.err "log_exporter.sh SD card not mounted"
    exit 1
  fi
  TARGET_FILE=$SD_PATH/$EXPORTFNAME
  TARGET_DIR=`dirname $SD_PATH/$EXPORTFNAME`
  if [ ! -d $TARGET_DIR ]
  then
    mkdir $TARGET_DIR
  fi
  echo "Exporting" $TARGET_FILE
  logger -p user.info "log_exporter.sh Exporting: " $TARGET_FILE
else
  TARGET_FILE=$4/$EXPORTFNAME
fi

# remove previous archive
rm -f $TARGET_FILE

#echo /bin/tar cf - $FILE_LIST \| $EXPORTER a -si -tzip -mx=1 $TARGET_FILE -p$PWD

$EXPORTER a -t7z -mx=3 $TARGET_FILE $FILE_LIST -p$PWD
sync
RETVAL=$?

if [ $RETVAL -eq 0 ];then
  logger -p user.info "log_exporter.sh Success"
  echo Success
fi
if [ $RETVAL -ne 0 ];then
  logger -p user.err "log_exporter.sh Failure"
  echo Failure
fi

exit $RETVAL