DIRECTORY=system

if [ -d "$DIRECTORY" ]; then
   echo [unmounting and removing current "$DIRECTORY" dir];
   echo trying to unmount "$DIRECTORY" dir;
   sudo umount "$DIRECTORY";
   rm -rfv "$DIRECTORY";
   echo creating new "$DIRECTORY" dir;
   mkdir "$DIRECTORY";
else
   echo creating "$DIRECTORY";
   mkdir "$DIRECTORY";
fi

if ! sudo simg2img system.img sys.raw 2>/dev/null; then
      echo [failed to create sys.raw];
      rm -f sys.raw
      echo mounting system.img
      sudo mount -t ext4 -o loop system.img system/
else
      echo [succeeded to create sys.raw];
      echo mounting sys.raw
      sudo mount -t ext4 -o loop sys.raw system/
fi

sudo chown -R user:user system