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#!/bin/bash
# Author: Steven Shiau <steven _at_ clonezilla org>
# License: GPL
# Program to create the EFI boot loader from grub2
# Settings
# Load functions
. /usr/share/gparted/bin/gl-functions
efi_required_mod="part_gpt part_msdos hfsplus fat ext2 ntfs btrfs normal chain boot configfile linux appleldr minicmd multiboot iso9660 acpi efi_gop efi_uga elf loadbios loopback video_fb usb search fixvideo png gfxterm gfxterm_background gfxterm_menu echo videotest video pci reboot halt gfxmenu gettext"
grub_required_files="/usr/share/grub/unicode.pf2"
# Functions
USAGE() {
echo "To create an EFI boot loader from grub2."
echo "Usage: $0 OUTPUT_DIR"
echo "OUTPUT_DIR is the where the created boot loader will be placed."
echo " E.g. $0 /tmp/efi/"
}
#
#############
### MAIN ###
#############
#
check_if_root
output_dir="$1"
# Checking
if [ ! -e /etc/debian_version ]; then
[ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
echo "This is not a Debian Linux system. This program only works on Debian Linux system."
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
echo "Program terminated!"
exit 1
fi
if [ -z "$output_dir" ]; then
[ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
echo "No output dir! Program terminated!"
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
USAGE
exit 1
fi
if [ ! -d "$output_dir" ]; then
[ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
echo "The output dir \"$output_dir\" does not exist, or it's not a directory."
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
echo "Program terminated!"
exit 1
fi
#
grub_efi_dir="$(mktemp -d /tmp/grub-efi.XXXXXX)"
for i in grub-efi-ia32 grub-efi-amd64; do
echo "Download $i from deb packages repository..."
LC_ALL=C apt-get -d --reinstall -y install $i &>/dev/null
done
for i in /var/cache/apt/archives/grub-efi*.deb; do
dpkg --extract $i $grub_efi_dir
done
# Prepare a grub.cfg so that the eltorito image could find it.
cat <<-GRUB_END > $grub_efi_dir/grub_head.cfg
search --file --set=root /.disk/info
set prefix=(\$root)/EFI/boot/
GRUB_END
# Check if xz compression is supported by grub-mkimage. If yes, use it. The prompt should look like:
# -C, --compression=(xz|none|auto) choose the compression to use
grub_mkimg_compress_opt=""
if [ -n "$(LC_ALL=C grub-mkimage --help 2>&1 | grep -Ew -- "-C" | grep -iw xz)" ]; then
# Even if grub-mkimage --help shows "-C xz" support, it still be possible that it actually lacks XZ support.
# Ref: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=692246
# Therefore we test here. When #692246 is fixed, we can remove this testing.
if LC_ALL=C grub-mkimage -C xz -O i386-efi -o /dev/null &>/dev/null; then
grub_mkimg_compress_opt="-C xz"
fi
fi
#
for i in i386 x86_64; do
export EFI_ARCH=$i
case "$EFI_ARCH" in
i386) out_f="$output_dir/bootia32.efi" ;;
x86_64) out_f="$output_dir/bootx64.efi" ;;
esac
# Checking the required modules
for im in $efi_required_mod; do
if [ ! -e "$grub_efi_dir/usr/lib/grub/$EFI_ARCH-efi/${im}.mod" ]; then
[ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
echo "Missing grub2 module ${im}.mod... Exluding ${im}.mod..."
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
efi_required_mod="$(echo $efi_required_mod | sed -r -e "s/$im //g")"
fi
done
grub-mkimage $grub_mkimg_compress_opt -O $EFI_ARCH-efi -d $grub_efi_dir/usr/lib/grub/$EFI_ARCH-efi/ -o $out_f --prefix=/EFI/boot/ -c $grub_efi_dir/grub_head.cfg $efi_required_mod
rc=$?
if [ "$rc" -gt 0 ]; then
# When grub-mkimage fails, an empty output file will still be created. We'd better to clean it.
rm -f $out_f
fi
done
# Copy the required files, e.g. fonts to the output dir.
cp -a $grub_required_files $output_dir
# Clean the temp dir
if [ -e "$grub_efi_dir" -a -n "$(echo $grub_efi_dir | grep -E "grub-efi")" ]; then
rm -rf $grub_efi_dir
fi
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