#!/bin/bash

user=$(whoami)
if [ "$user" != "root" ] || ! test -b "$1"
then
 echo ""
 echo "Usage:   sudo $0 <device>"
 echo ""
 echo "Example: sudo $0 /dev/sdx"
 echo ""
 echo "$0 needs 'gdisk'"
 echo ""
 exit
fi


echo \
"v
q" \
| gdisk "$1" 2>/dev/null |grep -e 'GPT: damaged' -e 'Problem:'
if [ $? -ne 0 ]
then
 echo "The GPT seems fine or there is no GPT on '$1'"
 exit
fi

umount "$1"?
df -h | grep "$1"

if [ $? -ne 0 ]
then
 echo "--------------------------------------------------"
 read -p "Do you want to fix the GPT on '$1'? (y/N) " ans
 if [ "$ans" == "y" ]
 then

echo \
"v
x
e
r
d
w
y" \
| gdisk "$1"

 fi
fi