#!/bin/bash 

bootdevice=$(mount | awk '/ \/boot / {gsub(/[0-9]/,"",$1);print $1}')
rootdevice=$(mount | awk '/ \/ / {gsub(/[0-9]/,"",$1);print $1}')
if [[ -n "${bootdevice}" ]]
then
  grub-install ${bootdevice}
  exit $?
elif [[ -n "${rootdevice}" ]]
then
  grub-install ${rootdevice}
  exit $?
else
  echo "Le disque d'installation de grub ne peut pas être déterminé."
  exit 127
fi