[bug #28843] Running grub-mkconfig under busybox outputs undesired configuration

[Marc Ferland]

URL:
  <http://savannah.gnu.org/bugs/?28843>

                 Summary: Running grub-mkconfig under busybox outputs
undesired configuration
                 Project: GNU GRUB
            Submitted by: bookmarc
            Submitted on: Mon 08 Feb 2010 07:02:30 PM GMT
                Category: Configuration
                Severity: Major
                Priority: 5 - Normal
              Item Group: Software Error
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Marc
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 
                 Release: 1.97
         Reproducibility: Every Time
         Planned Release: None

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Details:

Hi,

I am currently using grub version 1.97.1. 

I work on a small linux distro based on busybox and I recently observed a
strange behavior from grub-mkconfig. It seems that running grub-mkconfig on a
platform that doesn't have the /dev/disk/by-uuid/UUID nodes yields a grub
config that uses the kernel device name /dev/sdXN instead of the device UUID
even if this UUID is available through grub-probe.

This can be observed with the root=/dev/sdXY argument of the kernel boot
parameters.

This means that grub-mkconfig is dependant on whatever event system is
present on the system. For example, busybox uses mdev to create device nodes
under /dev, ubuntu-like distros use udev. mdev doesn't create the uuid
symlinks in /dev unlike udev.

IMHO, it would be desirable to use the UUID provided by grub-probe _even_ if
the device node UUID does not exists. This would ensure that grub works on a
wider range of linux platforms.

I was able to fix this on my platform by removing the:
test -e "/dev/disk/by-uuid/${GRUB_DEVICE_UUID}"
line in /etc/grub.d/10_linux.

Regards,

Marc





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