Re: [PATCH] Scan root device dynamically at startup

[Robert Millan]

On Tue, May 20, 2008 at 06:22:25PM +0800, Bean wrote:
> Hi,
> 
> For normal boot, the root device is passed to core.img in preloader.
> However, if we load grub2 using linux header, there is no way to know
> the root device. This patch add a new module findroot that can be used
> to scan the root directory at startup.
> 
> One important usage is to create a grub2 boot file for vista boot loader:
> 
> mkimage -o g2ntfs.img pc ntfs biosdisk findroot
> cat lnxboot.img g2ntfs.img > g2ntfs.mbr
> 
> The result g2ntfs.mbr is within 32K, which can be loaded by vista in
> one pass, no need to use the g2ldr.mbr anymore. The findroot modules
> ensure that prefix is set properly before switching to normal mode.
> 
> If findroot is not used to create core.img, the original booting method 
> remains.

The module is called findroot, but it initialises $prefix rather than $root.
Shouldn't it be findprefix or so?

Also, what this module is doing looks very similar to "search --set".  Did
you check if search command can be used for what you want?  (or otherwise
adapted)

-- 
Robert Millan

<GPLv2> I know my rights; I want my phone call!
<DRM> What good is a phone call… if you are unable to speak?
(as seen on /.)