192 lines
7.1 KiB
Bash
192 lines
7.1 KiB
Bash
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#!/bin/bash
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# title :gfu.sh
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# description :Installing the GRUB loader on a USB device.
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# author :Alexander Zhirov
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# date :20241014
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# version :0.1.0
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# usage :bash gfu.sh
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#===============================================================================
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[ ${GFU_DEBUG} ] && set -x
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SCRIPT_NAME="${0}"
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SCRIPT_PATH=$(dirname $(realpath ${SCRIPT_NAME}))
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GFU_PARTED=$(which parted 2>/dev/null)
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GFU_GRUB=$(which grub-install 2>/dev/null)
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[ -z "${GFU_PARTED}" ] && echo "The parted utility is not installed!" && exit 1
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[ -z "${GFU_GRUB}" ] && echo "The grub-install utility is not installed!" && exit 1
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[ ! "$(id -u)" == 0 ] && echo "Need to run as superuser!" && exit 1
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main () {
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local GFU_KEY=""
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local GFU_DEVICE=""
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local GFU_LEGACY_MODE=false
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local GFU_EFI_MODE=false
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local GFU_MOUNT_PATH=""
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while [[ $# -gt 0 ]] ; do
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GFU_KEY="$1"
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case "${GFU_KEY}" in
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-d|--device)
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GFU_DEVICE="${2}"
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shift
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;;
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-l|--legacy)
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GFU_LEGACY_MODE=true
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;;
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-e|--efi)
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GFU_EFI_MODE=true
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;;
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*)
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echo -e "Usage: $(basename ${SCRIPT_NAME}) -d <device> [OPTION]\n\n" \
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"\t-d, --device <device>\tBootloader Installation Device\n" \
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"\t-l, --legacy\t\tInstalling Legacy Bootloader\n" \
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"\t-e, --efi\t\tInstalling EFI Bootloader\n"
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exit 1
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;;
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esac
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shift
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done
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local GFU_GRUB_PATH="/usr/lib/grub"
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local GFU_GRUB_EFI_X32="i386-efi"
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local GFU_GRUB_EFI_X64="x86_64-efi"
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local GFU_GRUB_LEGACY="i386-pc"
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local GFU_MOUNT_PATH="$(mktemp -d)"
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GFU_DEVICE=${GFU_DEVICE:-$ENV_GFU_DEVICE}
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[ -z "${GFU_DEVICE}" ] && echo "ENV_GFU_DEVICE: The device was not set" && exit 1
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[ ! -b ${GFU_DEVICE} ] && echo "ENV_GFU_DEVICE: Device not found: ${GFU_DEVICE}" && exit 1
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${GFU_LEGACY_MODE} && ${GFU_EFI_MODE} && echo "You only need to set one mode: legacy or efi" && exit 1
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! ${GFU_LEGACY_MODE} && ! ${GFU_EFI_MODE} && echo "None of the modes are set: legacy or efi" && exit 1
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if ${GFU_LEGACY_MODE} ; then
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local GFU_GRUB_LEGACY_MODE_PATH="${GFU_GRUB_PATH}/${GFU_GRUB_LEGACY}"
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local GFU_GRUB_LEGACY_MODE=false
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[ -d ${GFU_GRUB_LEGACY_MODE_PATH} ] && GFU_GRUB_LEGACY_MODE=true
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! ${GFU_GRUB_LEGACY_MODE} && echo "No legacy bootloader was found for installation: ${GFU_GRUB_LEGACY}" && exit 1
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fi
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if ${GFU_EFI_MODE} ; then
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local GFU_GRUB_EFI_MODE_X32_PATH="${GFU_GRUB_PATH}/${GFU_GRUB_EFI_X32}"
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local GFU_GRUB_EFI_MODE_X64_PATH="${GFU_GRUB_PATH}/${GFU_GRUB_EFI_X64}"
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local GFU_GRUB_EFI_MODE_X32=false
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local GFU_GRUB_EFI_MODE_X64=false
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[ -d ${GFU_GRUB_EFI_MODE_X32_PATH} ] && GFU_GRUB_EFI_MODE_X32=true
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[ -d ${GFU_GRUB_EFI_MODE_X64_PATH} ] && GFU_GRUB_EFI_MODE_X64=true
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! ${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
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fi
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while true; do
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read -p "All data will be deleted from your device ${GFU_DEVICE}. Are you ready to continue? [Y/N]: " answer
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case "$answer" in
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[Yy]* ) break ;;
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[Nn]* ) exit 0 ;;
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* ) ;;
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esac
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done
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for partition in $(mount | grep "${GFU_DEVICE}[0-9]" | awk '{print $1}') ; do
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if ! umount -f ${partition} ; then
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echo "Failed to unmount ${partition}"
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exit 1
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fi
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done
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if ${GFU_LEGACY_MODE} ; then
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if parted ${GFU_DEVICE} -s mklabel msdos > /dev/null 2>&1 ; then
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echo "The msdos partition table on ${GFU_DEVICE} has been created successfully."
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else
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echo "Failed to create msdos partition table on ${GFU_DEVICE}. Further installation will be terminated."
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exit 1
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fi
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else
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if parted ${GFU_DEVICE} -s mklabel gpt > /dev/null 2>&1 ; then
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echo "The gpt partition table on ${GFU_DEVICE} has been created successfully."
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else
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echo "Failed to create gpt partition table on ${GFU_DEVICE}. Further installation will be terminated."
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exit 1
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fi
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fi
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if ! parted ${GFU_DEVICE} -s -- mkpart primary fat32 2048s 2099199s > /dev/null 2>&1 ; then
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echo "Failed to create primary partition on ${GFU_DEVICE}. Further installation will be terminated."
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exit 1
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fi
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if ! parted ${GFU_DEVICE} -s set 1 boot on > /dev/null 2>&1 ; then
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echo "Failed to make partition bootable. Further installation will be terminated."
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exit 1
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fi
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if ${GFU_LEGACY_MODE} ; then
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if ! parted ${GFU_DEVICE} -s set 1 lba on > /dev/null 2>&1 ; then
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echo "Failed to set lba flag. Further installation will be terminated."
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exit 1
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fi
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fi
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if ! mkfs.fat -F32 ${GFU_DEVICE}1 > /dev/null 2>&1 ; then
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echo "Failed to format ${GFU_DEVICE}1 to fat32. Further installation will be terminated."
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exti 1
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fi
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if ! mount -v -o umask=000 ${GFU_DEVICE}1 ${GFU_MOUNT_PATH} > /dev/null 2>&1 ; then
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echo "Failed to mount the device ${GFU_DEVICE}1 to the path ${GFU_MOUNT_PATH}. Further installation will be terminated."
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exit 1
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fi
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if ${GFU_LEGACY_MODE} ; then
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if ${GFU_GRUB_LEGACY_MODE} ; then
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if grub-install --no-floppy --boot-directory=${GFU_MOUNT_PATH}/boot --target=${GFU_GRUB_LEGACY} ${GFU_DEVICE} > /dev/null 2>&1 ; then
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echo "i386-pc bootloader was installed successfully."
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else
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echo "Failed to install i386-pc bootloader. Further installation will be terminated."
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exit 1
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fi
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fi
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else
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if ${GFU_GRUB_EFI_MODE_X32} ; then
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if grub-install --removable --boot-directory=${GFU_MOUNT_PATH}/boot --efi-directory=${GFU_MOUNT_PATH} --target=${GFU_GRUB_EFI_X32} ${GFU_DEVICE} > /dev/null 2>&1 ; then
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echo "i386-efi bootloader was installed successfully."
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else
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echo "Failed to install i386-efi bootloader. Further installation will be terminated."
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exit 1
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fi
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fi
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if ${GFU_GRUB_EFI_MODE_X64} ; then
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if grub-install --removable --boot-directory=${GFU_MOUNT_PATH}/boot --efi-directory=${GFU_MOUNT_PATH} --target=${GFU_GRUB_EFI_X64} ${GFU_DEVICE} > /dev/null 2>&1 ; then
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echo "x86_64-efi bootloader was installed successfully."
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else
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echo "Failed to install x86_64-efi bootloader. Further installation will be terminated."
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exit 1
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fi
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fi
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fi
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if [ -d ${SCRIPT_PATH}/grub ] ; then
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cp -r ${SCRIPT_PATH}/grub ${GFU_MOUNT_PATH}/boot
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else
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touch ${GFU_MOUNT_PATH}/boot/grub/grub.cfg
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fi
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if ! umount -v ${GFU_DEVICE}1 > /dev/null 2>&1 ; then
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echo "The installation is almost complete. But ${GFU_DEVICE} could not be unmounted."
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exit 1
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fi
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rm -rf ${GFU_MOUNT_PATH}
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echo "The boot device was created successfully!"
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}
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main "${@}"
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