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Re: Don`t understand error message

From: Yoshinori Okuji
Subject: Re: Don`t understand error message
Date: Sat, 4 Oct 2003 20:10:09 +0100 (BST)

 --- Robert Millan <address@hidden> wrote:
> If I understood correctly, the GRUB shell relies on device.map to translate
> BIOS devices into kernel device files, and uses standard Un*x calls on /dev
> to access the devices. Is that it?

Exactly. Also, the grub shell creates a new device map file "by guessing" if
the file is not found.

> I believe a good solution could be to fix kernels to forward requests on
> ioctl too, if that fixes the problem.

I don't think the problem is so complicated. I believe that the problem is just
that the script grub-install cannot identify, say, /dev/sda as 
/dev/scsi/host0/bus0/target0/lun0. It is not related to ioctl or any other
system call (note: the grub shell never specify O_NOFOLLOW when opening device

See the function "convert" in grub-install. It greps a device map file to
detect an OS device corresponding to a BIOS drive. Consider what happens in the
case that the OS device is a symlink.


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