mjh-lglaf-2

#!/usr/bin/bash

REPO=/home/mhooten/lglaf/h872
cd $REPO

TWRPFILE="h872-twrp.img"   # twrp-3.2.1-0-h870.img
OUTFILE="twrp-out.img"     # twrptestout.img
INFILE="twrp-in.img"       # twrptest.img
LAFBAK=lafbak
COUNT=21244                # 21420
TRIES=10

while true; do
   let x=x+1
   echo "$(date)  Attempt #$x"

   echo "Storing $TWRPFILE in $LAFBAK partition"
   sudo ./partitions.py --restoremisc $TWRPFILE $LAFBAK
   [ -e $INFILE ] && rm -f $INFILE
   echo "Dumping $LAFBAK partition"
   sudo ./partitions.py --dump        $INFILE   $LAFBAK
   [ -e $OUTFILE ] && rm -f $OUTFILE
   echo "Trimming $TWRP file down"
   dd if=$INFILE of=$OUTFILE bs=1024 count=$COUNT

   RES1=$(sha256sum $TWRPFILE | awk '{print $1}')
   RES2=$(sha256sum $OUTFILE  | awk '{print $1}')

   echo "   RES1 = '$RES1'"
   echo "   RES2 = '$RES2'"

   if [[ "$RES1" == "$RES2" ]]; then
      echo "Success. RES1 equals RES2. Exiting."
      break # exit
   fi
   if [ $x -eq $TRIES ]; then
      echo "Failure. Giving up after $TRIES attempts."
      break # exit
   fi
done