操作系统开发 - 在disk image上安裝grub2

網上很少關於grub2在disk image上的安裝方法，所以寫這編教程:

Makefile:

dd if=/dev/zero of=hd.img count=20 bs=1047675

./createPartition.sh

kpartx -a hd.img

mkfs.vfat /dev/mapper/loop0p1

mount /dev/mapper/loop0p1 1

mkdir -p 1/boot/grub

cp grub.cfg 1/boot/grub/grub.cfg

cp testing_kernel 1/boot

echo "(hd0) /dev/loop0" > device.map

echo "set prefix=(hd0,msdos1)/boot/grub" > mycfg.cfg

~/grub2/bin/grub-mkimage --config=mycfg.cfg -p /boot -O i386-pc -o 1/boot/grub/core.img loadenv chain biosdisk part_dvh part_msdos msdospart part_gpt exfat ext2 fat vbe vga ntfs echo test configfile minicmd hdparm normal

cp ~/grub2/lib/grub/i386-pc/boot.img 1/boot/grub/

~/grub2/sbin/grub-bios-setup -m device.map -d 1/boot/grub /dev/loop0

sleep 1

umount 1

kpartx -d hd.img

grub.cfg:

set timeout=15

set root=(hd0,msdos1)

#set default=0 # Set the default menu entry

menuentry "china ar" {

insmod ext2

set root=(hd0,msdos1)

chainloader +1

# multiboot /boot/testing_kernel # The multiboot command replaces the kernel command

# boot

}

menuentry "OS Name 2" {

multiboot /boot/testing_kernel # The multiboot command replaces the kernel command

boot

}

creeatePartition.sh:

#!/bin/bash

cat <<EOM| fdisk hd.img

n

p

1

t

c

w

EOM

echo ok # you need this line