gfu/install.sh

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#!/bin/bash
[ ${GFU_DEBUG} ] && set -x
# set -x
SCRIPT_NAME="${0}"
SCRIPT_PATH=$(dirname $(realpath ${SCRIPT_NAME}))
GFU_PARTED=$(which parted 2>/dev/null)
GFU_GRUB=$(which grub-install 2>/dev/null)
[ -z "${GFU_PARTED}" ] && echo "The parted utility is not installed" && exit 1
[ -z "${GFU_GRUB}" ] && echo "The grub-install utility is not installed" && exit 1
[ ! "$(id -u)" == 0 ] && echo "Need to run as superuser" && exit 1
main () {
local GFU_KEY=""
local GFU_DEVICE=""
local GFU_LEGACY_MODE=false
local GFU_EFI_MODE=false
local GFU_MOUNT_PATH=""
while [[ $# -gt 0 ]] ; do
GFU_KEY="$1"
case "${GFU_KEY}" in
-d|--device)
GFU_DEVICE="${2}"
shift
;;
-l|--legacy)
GFU_LEGACY_MODE=true
;;
-e|--efi)
GFU_EFI_MODE=true
;;
-p|--path)
GFU_MOUNT_PATH="${2}"
shift
;;
*)
break
;;
esac
shift
done
local GFU_GRUB_PATH="/usr/lib/grub"
local GFU_GRUB_EFI_X32="i386-efi"
local GFU_GRUB_EFI_X64="x86_64-efi"
local GFU_GRUB_LEGACY="i386-pc"
GFU_DEVICE=${GFU_DEVICE:-$ENV_GFU_DEVICE}
[ -z "${GFU_DEVICE}" ] && echo "ENV_GFU_DEVICE: The device was not set" && exit 1
[ ! -b ${GFU_DEVICE} ] && echo "ENV_GFU_DEVICE: Device not found: ${GFU_DEVICE}" && exit 1
${GFU_LEGACY_MODE} && ${GFU_EFI_MODE} && echo "You only need to set one mode: legacy or efi" && exit 1
! ${GFU_LEGACY_MODE} && ! ${GFU_EFI_MODE} && echo "None of the modes are set: legacy or efi" && exit 1
GFU_MOUNT_PATH=${GFU_MOUNT_PATH:-$ENV_GFU_MOUNT_PATH}
[ -z "${GFU_MOUNT_PATH}" ] && echo "ENV_GFU_MOUNT_PATH: The path to the mount directory was not set" && exit 1
GFU_MOUNT_PATH=$(realpath ${GFU_MOUNT_PATH} 2>/dev/null)
if ${GFU_LEGACY_MODE} ; then
local GFU_GRUB_LEGACY_MODE_PATH="${GFU_GRUB_PATH}/${GFU_GRUB_LEGACY}"
local GFU_GRUB_LEGACY_MODE=false
[ -d ${GFU_GRUB_LEGACY_MODE_PATH} ] && GFU_GRUB_LEGACY_MODE=true
! ${GFU_GRUB_LEGACY_MODE} && echo "No legacy bootloader was found for installation: ${GFU_GRUB_LEGACY}" && exit 1
fi
if ${GFU_EFI_MODE} ; then
local GFU_GRUB_EFI_MODE_X32_PATH="${GFU_GRUB_PATH}/${GFU_GRUB_EFI_X32}"
local GFU_GRUB_EFI_MODE_X64_PATH="${GFU_GRUB_PATH}/${GFU_GRUB_EFI_X64}"
local GFU_GRUB_EFI_MODE_X32=false
local GFU_GRUB_EFI_MODE_X64=false
[ -d ${GFU_GRUB_EFI_MODE_X32_PATH} ] && GFU_GRUB_EFI_MODE_X32=true
[ -d ${GFU_GRUB_EFI_MODE_X64_PATH} ] && GFU_GRUB_EFI_MODE_X64=true
! ${GFU_GRUB_EFI_MODE_X32} && ! ${GFU_GRUB_EFI_MODE_X64} && echo "No EFI bootloader was found for installation: ${GFU_GRUB_EFI_X32} or ${GFU_GRUB_EFI_X64}" && exit 1
fi
if [ ! -d ${GFU_MOUNT_PATH} ] ; then
echo "Path is not a directory: ${GFU_MOUNT_PATH}"
exit 1
fi
if [ ! -z "$(ls -A ${GFU_MOUNT_PATH})" ]; then
echo "Path is not empty: ${GFU_MOUNT_PATH}"
exit 1
fi
while true; do
read -p "All data will be deleted from your device ${GFU_DEVICE}. Are you ready to continue? [Y/N]: " answer
case "$answer" in
[Yy]* ) break ;;
[Nn]* ) exit 0 ;;
* ) ;;
esac
done
for partition in $(mount | grep "${GFU_DEVICE}[0-9]" | awk '{print $1}') ; do
if ! umount -f ${partition} ; then
echo "Failed to unmount ${partition}"
exit 1
fi
done
if ${GFU_LEGACY_MODE} ; then
parted ${GFU_DEVICE} -s mklabel msdos
else
parted ${GFU_DEVICE} -s mklabel gpt
fi
parted ${GFU_DEVICE} -s -- mkpart primary fat32 2048s 2099199s
parted ${GFU_DEVICE} -s set 1 boot on
if ${GFU_LEGACY_MODE} ; then
parted ${GFU_DEVICE} -s set 1 lba on
fi
mkfs.fat -F32 ${GFU_DEVICE}1
if ! mount -v -o umask=000 ${GFU_DEVICE}1 ${GFU_MOUNT_PATH} ; then
echo "Failed to mount the device ${GFU_DEVICE}1 to the path ${GFU_MOUNT_PATH}. Further installation will be terminated"
exit 1
fi
if ${GFU_LEGACY_MODE} ; then
${GFU_GRUB_LEGACY_MODE} && grub-install --no-floppy --boot-directory=${GFU_MOUNT_PATH}/boot --target=${GFU_GRUB_LEGACY} ${GFU_DEVICE}
else
${GFU_GRUB_EFI_MODE_X32} && grub-install --removable --boot-directory=${GFU_MOUNT_PATH}/boot --efi-directory=${GFU_MOUNT_PATH} --target=${GFU_GRUB_EFI_X32} ${GFU_DEVICE}
${GFU_GRUB_EFI_MODE_X64} && grub-install --removable --boot-directory=${GFU_MOUNT_PATH}/boot --efi-directory=${GFU_MOUNT_PATH} --target=${GFU_GRUB_EFI_X64} ${GFU_DEVICE}
fi
if [ -d ${SCRIPT_PATH}/grub ] ; then
cp -r ${SCRIPT_PATH}/grub ${GFU_MOUNT_PATH}/boot
else
touch ${GFU_MOUNT_PATH}/boot/grub/grub.cfg
fi
umount -v ${GFU_DEVICE}1
}
main "${@}"