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0.1.0

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CHANGELOG.md Normal file
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# Changelog
## [0.1.0]() (2024.10.14)
### The first stable working release
- Burning GRUB bootloader to USB device
- EFI and Legacy bootloader support (`x86_64-efi`, `i386-efi`, `i386-pc`)

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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
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Yoyodyne, Inc., hereby disclaims all copyright interest in the program
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<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
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consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.

54
README.md
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# GRUB for USB
```sh
NAME FSTYPE FSVER LABEL
sda
├─sda1 vfat FAT32
├─sda2 ext4 1.0 unix
├─sda3 ntfs win10lite
├─sda4 ntfs win11
└─sda5 ntfs win10
Installing the GRUB loader on a USB device.
**The script creates only the primary boot partition of 1 GiB (EFI or Legacy). Use other utilities to mark up the rest of the unallocated space.**
![gfu](data/gfu.png)
## Usage
Clone the repository:
```bash
$ git clone https://github.com/AlexanderZhirov/gfu.git
```
Go to "GRUB for USB":
```bash
$ cd gfu
```
Install bootloader on your device (eg `/dev/sdd`):
```bash
$ sudo ./gfu.sh --device /dev/sdd --legacy
All data will be deleted from your device /dev/sdd. Are you ready to continue? [Y/N]: y
The msdos partition table on /dev/sdd has been created successfully.
i386-pc bootloader was installed successfully.
The boot device was created successfully!
```
### Help
```
Usage: gfu.sh -d <device> [OPTION]
-d, --device <device> Bootloader Installation Device
-l, --legacy Installing Legacy Bootloader
-e, --efi Installing EFI Bootloader
```
## Menuentries
The `grub/menuentries` directory contains configuration files that are automatically read by `grub.cfg`. Therefore, there is no need to edit the main file. It is enough to place your boot configurations in `grub/menuentries`.
## Themes
You can also upload the theme you want to the theme directory and set it as the default theme in `themes/theme.cfg`

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gfu.sh Executable file
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#!/bin/bash
# title :gfu.sh
# description :Installing the GRUB loader on a USB device.
# author :Alexander Zhirov
# date :20241014
# version :0.1.0
# usage :bash gfu.sh
#===============================================================================
[ ${GFU_DEBUG} ] && set -x
SCRIPT_NAME="${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
;;
*)
echo -e "Usage: $(basename ${SCRIPT_NAME}) -d <device> [OPTION]\n\n" \
"\t-d, --device <device>\tBootloader Installation Device\n" \
"\t-l, --legacy\t\tInstalling Legacy Bootloader\n" \
"\t-e, --efi\t\tInstalling EFI Bootloader\n"
exit 1
;;
esac
shift
done
local GFU_GRUB_PATH="/usr/lib/grub"
local GFU_GRUB_EFI_X32="i386-efi"
local GFU_GRUB_EFI_X64="x86_64-efi"
local GFU_GRUB_LEGACY="i386-pc"
local GFU_MOUNT_PATH="$(mktemp -d)"
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
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
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
if parted ${GFU_DEVICE} -s mklabel msdos > /dev/null 2>&1 ; then
echo "The msdos partition table on ${GFU_DEVICE} has been created successfully."
else
echo "Failed to create msdos partition table on ${GFU_DEVICE}. Further installation will be terminated."
exit 1
fi
else
if parted ${GFU_DEVICE} -s mklabel gpt > /dev/null 2>&1 ; then
echo "The gpt partition table on ${GFU_DEVICE} has been created successfully."
else
echo "Failed to create gpt partition table on ${GFU_DEVICE}. Further installation will be terminated."
exit 1
fi
fi
if ! parted ${GFU_DEVICE} -s -- mkpart primary fat32 2048s 2099199s > /dev/null 2>&1 ; then
echo "Failed to create primary partition on ${GFU_DEVICE}. Further installation will be terminated."
exit 1
fi
if ! parted ${GFU_DEVICE} -s set 1 boot on > /dev/null 2>&1 ; then
echo "Failed to make partition bootable. Further installation will be terminated."
exit 1
fi
if ${GFU_LEGACY_MODE} ; then
if ! parted ${GFU_DEVICE} -s set 1 lba on > /dev/null 2>&1 ; then
echo "Failed to set lba flag. Further installation will be terminated."
exit 1
fi
fi
if ! mkfs.fat -F32 ${GFU_DEVICE}1 > /dev/null 2>&1 ; then
echo "Failed to format ${GFU_DEVICE}1 to fat32. Further installation will be terminated."
exti 1
fi
if ! mount -v -o umask=000 ${GFU_DEVICE}1 ${GFU_MOUNT_PATH} > /dev/null 2>&1 ; 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
if ${GFU_GRUB_LEGACY_MODE} ; then
if grub-install --no-floppy --boot-directory=${GFU_MOUNT_PATH}/boot --target=${GFU_GRUB_LEGACY} ${GFU_DEVICE} > /dev/null 2>&1 ; then
echo "i386-pc bootloader was installed successfully."
else
echo "Failed to install i386-pc bootloader. Further installation will be terminated."
exit 1
fi
fi
else
if ${GFU_GRUB_EFI_MODE_X32} ; then
if grub-install --removable --boot-directory=${GFU_MOUNT_PATH}/boot --efi-directory=${GFU_MOUNT_PATH} --target=${GFU_GRUB_EFI_X32} ${GFU_DEVICE} > /dev/null 2>&1 ; then
echo "i386-efi bootloader was installed successfully."
else
echo "Failed to install i386-efi bootloader. Further installation will be terminated."
exit 1
fi
fi
if ${GFU_GRUB_EFI_MODE_X64} ; then
if grub-install --removable --boot-directory=${GFU_MOUNT_PATH}/boot --efi-directory=${GFU_MOUNT_PATH} --target=${GFU_GRUB_EFI_X64} ${GFU_DEVICE} > /dev/null 2>&1 ; then
echo "x86_64-efi bootloader was installed successfully."
else
echo "Failed to install x86_64-efi bootloader. Further installation will be terminated."
exit 1
fi
fi
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
if ! umount -v ${GFU_DEVICE}1 > /dev/null 2>&1 ; then
echo "The installation is almost complete. But ${GFU_DEVICE} could not be unmounted."
exit 1
fi
rm -rf ${GFU_MOUNT_PATH}
echo "The boot device was created successfully!"
}
main "${@}"

10
grub/grub.cfg
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@ -94,7 +94,9 @@ function loadtheme {
set menu_color_highlight="black/light-gray"
}
loadtheme "default"
source (${root})/boot/grub/themes/theme.cfg
loadtheme ${default_theme}
if [ "${recordfail}" = 1 ] ; then
set timeout=30
@ -111,16 +113,14 @@ if [ "${grub_platform}" = "efi" ] ; then
rmmod tpm
fi
# Подключение конфигурационных файлов
for cfg in (${root})/boot/grub/menuentries/*.cfg ; do
source $cfg
done
menuentry 'Перезагрузить компьютер' --class restart {
menuentry 'Reboot' --class restart {
reboot
}
menuentry 'Выключить компьютер' --class shutdown {
menuentry 'Shutdown' --class shutdown {
halt
}

2
grub/themes/default/theme.txt
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@ -38,7 +38,7 @@ terminal-border: "0"
width = 30%
align = "center"
id = "__timeout__"
text = "Автоматическая загрузка через %d секунд"
text = "Booting in %d seconds"
color = "#cccccc"
font = "Unifont Regular 16"
}

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grub/themes/theme.cfg Normal file
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default_theme="default"

133
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="${2}"
shift
;;
-l|--legacy)
GFU_LEGACY_MODE=true
;;
-e|--efi)
GFU_EFI_MODE=true
;;
*)
break
;;
esac
shift
done
local GFU_GRUB_PATH="/usr/lib/grub"
local GFU_GRUB_EFI_X32="i386-efi"
local GFU_GRUB_EFI_X64="x86_64-efi"
local GFU_GRUB_LEGACY="i386-pc"
local GFU_MOUNT_PATH=`$(mktemp -d)`
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
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
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
rm -rf ${GFU_MOUNT_PATH}
}
main "${@}"