echo checking if usb cable connected
usbstate=$(cat /sys/class/android_usb/android0/state)
if test "$usbstate" = "CONFIGURED"
then 
echo cable connected
echo

echo unmounting ext-sd card from phone
busybox umount /mnt/media_rw/external_SD
busybox umount /mnt/secure/asec

echo setting usb config to mass storage
setprop persist.sys.usb.config mass_storage,adb

echo mounting ext-sd card to pc
mountstatus=$(cat /sys/devices/virtual/android_usb/android0/f_mass_storage/lun/file)
if test "$mountstatus" != "/dev/block/vold/179:65"
then
echo /dev/block/vold/179:65 > /sys/devices/virtual/android_usb/android0/f_mass_storage/lun/file
fi
echo usb mass storage connected
echo

#waiting for disconnection
while test $usbstate = "CONFIGURED";do
sleep 5
usbstate=$(cat /sys/class/android_usb/android0/state)
done
echo cable disconnected
echo

echo remounting ext-sd card to phone...
busybox mount -t vfat -o rw,dirsync,nosuid,nodev,noexec,relatime,uid=1023,gid=1023,fmask=0007,dmask=0007,allow_utime=0020,utf8 /dev/block/vold/179:65 /mnt/media_rw/external_SD
busybox mount -t vfat -o rw,dirsync,nosuid,nodev,noexec,relatime,uid=1023,gid=1023,fmask=0007,dmask=0007,allow_utime=0020,utf8 /dev/block/vold/179:65 /mnt/secure/asec
echo mount complete
echo end


else 
echo cable not connected
echo run script after connecting cable
echo end

fi