wee install script for grub4dos

发表于 2010-12-31

wee是由不点基于grub4dos开发的嵌入微型 grub,可以安装到硬盘MBR上代替原来的引导代码.

有什么用途呢?

得益于GRUB4DOS的灵活性,wee同样很灵活,可以启动任意支持的分区上的可启动文件.

比如你的系统引导文件损坏了,如果是默认的MBR,则这时整个系统就挂掉了.有安装了wee就不一样了.

可以利用它来启动备用的或其它的引导程序,然后进行修复工作.

英文好的可以看一下软件的说明和readme

This software initially aims to install on the MBR track of the hard drive,
though also possible to write to ROM by someone who is interested.

WEE access disk sectors only using EBIOS(int13/AH=42h), and never using
CHS mode BIOS call(int13/AH=02h). So, if the BIOS does not support EBIOS
on a drive, then WEE will not be able to access that drive.

WEE supports FAT12/16/32, NTFS and ext2/3/4, and no other file systems are
supported.

WEE can boot up IO.SYS(Win9x), KERNEL.SYS(FreeDOS), VMLINUZ(Linux), NTLDR/
BOOTMGR(Windows), GRLDR(grub4dos). And GRUB.EXE(grub4dos) is also bootable
because it is of a valid Linux kernel format.

Any single sector boot record file(with 55 AA at offset 0x1FE) can boot
as well.

Besides, WEE can run 32-bit programs written for it.

wee readme

本代码只是为了测试还有示范一下GRUB4DOS的批处理功能
安装会比较麻烦,可以参考无忧启动论坛的贴子进行图形界面安装.

我利用最新版GRUB4DOS的功能写了一个脚本,用于安装wee到硬盘上.可以把脚本和wee63.mbr放在u盘或光盘上用grub4dos启动来进行安装修复.

使用方法:

instwee NUM
NUM是0-9的数字,代表着要安装到哪个磁盘.

比如安装到第一个硬盘

instwee 0
instwee menu NUM
显示指定硬盘已经安装wee的内置菜单
instwee menu NUm weemenufile
导入菜单
例子: 导入/boot/grub/menu.wee菜单文件到第一硬盘已经安装的wee中.
instwee menu 0 /boot/grub/menu.wee

[2010-12-30更新下载] (http://dl.dbank.com/c0at23wlxf)

添加简易的GPT磁盘判断，如果是GPT磁盘，拒绝安装。
其它小调整。

安装界面截图: 按Y键确认安装,其它键退出.

如果之前已经安装过了,提示按R键重新安装.

安装成功,现在的MBR就是WEE引导代码了.

显示菜单截图.instwee menu 0

附上GRUB4DOS的批处理代码:

!BAT wee install script for grub4dos by chenall http://chenall.net/post/grub4dos_instwee/
debug off
checkrange 20101230:-1 read 0x8278 || goto :help
::对临时变量所使用的内存0x60000进行初始化(置0操作)
echo -n > (md)0x300+2
clear
write (md)0x300+1 %1 || goto :help
::检测第一个参数，如果是menu则跳到menu块执行．
checkrange 0x756e656d read 0x60000 && goto :menu
:0x30:0x39 是 0-9的ASCII码
checkrange 0x30:0x39 read 0x60000 || goto :help
cat (md)0x300+1,1 | call :confirm hd
exit

:menu
write (md)0x301+1 %2 || goto :Error
checkrange 0x30:0x39 read 0x60200 || goto :help
cat --locate=wee (hd%2)+1,0x1b0 || goto :failed
map --mem=0xf000 (hd%2)50+13 (rd)
:::自动检测菜单位置,注以下内容比较复杂,没有弄懂不要乱改,否则可能导致写盘出错.
debug 1
cat --locate=\xB0\x02\x1A\xCE --number=1 (rd)+1 > (md)0x300+1,8
debug off
cat (md)0x300+1,8 | echo -n | calc *0x60010=16+0x
calc *0x82d8=13<<9-*0x60010
calc *0x82d0=0x1E00000+*0x60010
::没有指定菜单文件参数显示当前菜单内容.
cat --length=0 %3 || goto :show_menu
echo Importing wee menu..
calc *0x82d8=*0x8290+0x1f&0xff0
cat %3 > (rd)+1
calc *0x82d0=0x1E00000+*0x60010-16
cat (md)0x300+1,5 | echo -n | dd if=(rd)+1 of=(hd%2)50+13 bs=1 seek=0x
echo succeeded!
exit

:show_menu
debug 1
cat --locate=\0 --number=1 (rd)+1 > (md)0x301+1,4
debug off
cat (md)0x301+1,4 | echo -n | calc *0x82d8=0x
clear
echo -P:0715 $[0104]wee menu export
echo -e -P:0408 $[0104]wee $[0003]install script for $[0106]grub4dos $[0105]by chenall
echo -P:0535 $[0003]http://chenall.net/post/grub4dos_instwee/
cat (rd)+1
exit

:confirm
checkrange 0xEE parttype (%1,0) && call :Err_msg Not support GPT DISK!
echo -e -P:0810 $[1104]Warning: $[0004]Will install wee63.mbr to %1 \n\n\n\t$[0003]Please press $[0002]'Y' $[0003]to confirm, any other keys to exit...
echo -e -P:0408 $[0104]wee $[0003]install script for $[0106]grub4dos $[0105]by chenall
echo -P:0535 $[0003]http://chenall.net/post/grub4dos_instwee/
checkrange 0x59,0x79 pause || call :Err_msg Cancelled.
:install
echo checking...
map --mem=0xF000 /boot/grub/wee63.mbr (rd) || call :Err_msg /boot/grub/wee63.mbr not found.
cat --locate=wee (rd)+1,0x1b8 || call :Err_msg wee63.mbr file.
::检测WEE63.MBR是否正确
dd if=(rd)+1 of=(md)0x300+1 bs=1 count=4 skip=0x86
checkrange 0xCE1A02B0 read 0x60000 || call :Err_msg wee63.mbr file.
call :check_installed %1
echo Installing...
::备份原来的MBR到第二扇区如果已经安装则直接备份第二扇区
checkrange 840202 read 0x60004 && dd if=(%1)1+1 of=(rd)1+1 ! dd if=(%1)+1 of=(rd)1+1
::复制分区表到第1扇区
dd if=(%1)+1 of=(rd)+1 skip=0x1b8 seek=0x1b8 bs=1
::检测是否有menu.wee文件
cat --length=0 /BOOT/GRUB/MENU.WEE && call :inst_menu
::写入硬盘前63扇区
dd if=(rd)+1 of=(%1) count=63
echo Good luck! succeeded!
exit

:inst_menu
::debug 1是必须的，因为我们要提取结果．
debug 1
::定位菜单开始位置
cat --locate=\xB0\x02\x1A\xCE --number=1 (rd)50+10 > (md)0x300+1,8
debug off
cat (md)0x300+1,5 | echo -n | calc *0x60010=50<<9+16+0x
::设置rd-base在菜单开始位置这样可以就直接用(rd)+1的方式来访问菜单内容．
calc *0x82D0=0x1E00000+*0x60010
::菜单长度，menu.wee文件长度,16字节对齐．最长不超过4KB
calc *0x82D8=*0x8290+0x1f&0xff0
::写入菜单
cat /BOOT/GRUB/MENU.WEE > (rd)+1
::重新计算rd-base和rd-size.
calc *0x82D8=*0x8290+0xf&0xff0+*0x60010
calc *0x82D0=0x1E00000
exit

:check_installed 
cat --locate=wee (%1)+1,0x1b8 || exit
echo wee already installed,Press 'R' to reinstall.
checkrange 0x52,0x72 pause || exit 5
write 0x60004 840202
exit

:failed
echo failed!
exit 3

:Err_msg
echo
echo Error: %1 %2 %3 %4 %5 %6 %7 %8 %9
pause Press any key to continue . . .
exit 1

:Error
:help
echo -e Usage:\n Install wee\t instwee NUM\n show menu\t instwee menu NUM\n import menu\t instwee menu NUM weemenufile\ne.g.:\tinstall wee to (hd0)\n\tinstwee 0
echo Notes: You must use grub4dos-0.4.5b-2010-12-30 or later!
exit 1

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