Problem with gnu-setup

Problem with gnu-setup

[Yves BLUSSEAU]

Hi,

i'm trying to install grub2  to a partition instead of the MBR (i  
known it's a bad idea, but i need to chainload grub2 from another  
bootloader).
The problem is when i try to install the boot stages with grub-setup i  
have this error:

/usr/local/sbin/grub2-setup -v --force --directory=/tmp/mnt/boot/grub2  
--device-map=/tmp/mnt/boot/grub2/device.map '(hd2,2)'

grub-setup: error: Cannot read `/tmp/mnt/boot/grub2/core.img' correctly


The problem came from line 405 of grub-setup.c
  core_path_dev = grub_util_get_path (dir, core_file);

core_path_dev need to contain the path AND the device to the core  
file, but it's only a "concatenation" of dir and core_file.

In my case it contain /tmp/mnt/boot/grub2/core.img so when grub try to  
read the core image FROM grub it can't: grub_file_open return with an  
error because it don't know the device.

core_path_dev need to be (hd2,2)//tmp/mnt/boot/grub2/core.img in my  
case to work.

Can someone fix this bug ?

Another think i don't understand is that i don't see where the  
blocklists are saved because at this end of grub-setup.c (line 520):
  fp = fopen (core_path, "r+b");
  if (! fp)
    grub_util_error ("Cannot open `%s'", core_path);

  grub_util_write_image (core_img, GRUB_DISK_SECTOR_SIZE * 2, fp);

the core file is open in read mode so no datas can be written.

I hope that this can help you.

Yves Blusseau

Re: Problem with gnu-setup

[Vladimir 'phcoder' Serbinenko]

On Sat, Jun 27, 2009 at 12:39 PM, Yves BLUSSEAU<cl7m42e02@sneakemail.com> wrote:
> Hi,
>
> i'm trying to install grub2  to a partition instead of the MBR (i known it's
> a bad idea, but i need to chainload grub2 from another bootloader).
I would rather chainload other bootloader from grub2. If you use
another bootloader because of a specific feature speak about it here
perhaps someone will be interested to implement it in grub2
> The problem is when i try to install the boot stages with grub-setup i have
> this error:
>
> /usr/local/sbin/grub2-setup -v --force --directory=/tmp/mnt/boot/grub2
> --device-map=/tmp/mnt/boot/grub2/device.map '(hd2,2)'
>
> grub-setup: error: Cannot read `/tmp/mnt/boot/grub2/core.img' correctly
>
>
> The problem came from line 405 of grub-setup.c
>  core_path_dev = grub_util_get_path (dir, core_file);
>
> core_path_dev need to contain the path AND the device to the core file, but
> it's only a "concatenation" of dir and core_file.
>
> In my case it contain /tmp/mnt/boot/grub2/core.img so when grub try to read
> the core image FROM grub it can't: grub_file_open return with an error
> because it don't know the device.
>
> core_path_dev need to be (hd2,2)//tmp/mnt/boot/grub2/core.img in my case to
> work.
>
> Can someone fix this bug ?
use patch by Felix Zielcke
>
> Another think i don't understand is that i don't see where the blocklists
> are saved because at this end of grub-setup.c (line 520):
>  fp = fopen (core_path, "r+b");
>  if (! fp)
>   grub_util_error ("Cannot open `%s'", core_path);
>
>  grub_util_write_image (core_img, GRUB_DISK_SECTOR_SIZE * 2, fp);
>
> the core file is open in read mode so no datas can be written.
>
> I hope that this can help you.
>
> Yves Blusseau
>
>
> _______________________________________________
> Grub-devel mailing list
> Grub-devel@gnu.org
> http://lists.gnu.org/mailman/listinfo/grub-devel
>



-- 
Regards
Vladimir 'phcoder' Serbinenko

Personal git repository: http://repo.or.cz/w/grub2/phcoder.git