mkboot

#!/usr/bin/env bash
# $1=model $2=version
MODEL="$1"
VER="$2"
SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}"   )" && pwd   )"
ROOT=$(dirname ${SCRIPT_DIR})
MV=${MODEL}_${VER}
WORKDIR=$ROOT/$MV
PAT=$ROOT/pat/$MV

fallocate -l 50M $WORKDIR/synoboot.img
sgdisk -o -n 0:0:+15M -t 1:EF00  -n 0:0:+30M -n 0:0: -t 3:EF02 -c 1:boot -c 2:image -c 3:legacy $WORKDIR/synoboot.img

kpartx -as $WORKDIR/synoboot.img

loopdev=`sudo kpartx -l $WORKDIR/synoboot.img | tr ' ' '\n' | fgrep -m1 /dev/loop `

parts=`kpartx -l $WORKDIR/synoboot.img |cut -d: -f1`
for part in $parts;do
	mkfs.vfat "/dev/mapper/$part"
done

part1=`echo $parts | cut -d\  -f1`
part2=`echo $parts | cut -d\  -f2`
mkdir $WORKDIR/bl
mount -o noexec,nosuid,nodev "/dev/mapper/$part1" $WORKDIR/bl
grub-install --target=x86_64-efi --efi-directory=$WORKDIR/bl --removable --no-nvram  -s --no-bootsector --boot-directory=$WORKDIR/bl
grub-install --target=i386-pc -s --boot-directory=$WORKDIR/bl $loopdev
cp $WORKDIR/grub.cfg $WORKDIR/bl/grub/
umount $WORKDIR/bl
rm -rf $WORKDIR/bl

mkdir $WORKDIR/img
mount -o noexec,nosuid,nodev "/dev/mapper/$part2" $WORKDIR/img
cp $PAT/rd.gz $WORKDIR/img/rd.gz
if [ -f $WORKDIR/bzImage ]; then
	cp $WORKDIR/bzImage $WORKDIR/img/
fi
cp $PAT/zImage $WORKDIR/img/
if [ -f $WORKDIR/jun.lzma ]; then
	cp $WORKDIR/jun.lzma $WORKDIR/img/extra.lzma
fi
if [ -f $WORKDIR/info.txt ]; then
	cp $WORKDIR/info.txt $WORKDIR/img/
fi
umount $WORKDIR/img
rm -rf $WORKDIR/img
kpartx -d $WORKDIR/synoboot.img