Bug#462218: Bug#461442: detection of other OSes in update-grub

[Fabian Greffrath]

Hi there,

Robert Millan schrieb:
> If you want the former, feel free to send a patch to grub-devel.  For the
> latter, look at my questions and send some feedback.

please find attached a patch that adds a new parameter '--device, -d' to 
grub-probe. If this parameter is set, grub-probe expects the given 
argument to be a block device. All of the '--target' parameters work 
with this option as well. If the '--device' parameter is not set, 
grub-probe will work as before.
Furthermore I had to add a new public function to getroot.c that returns 
the given argument if it is a block device and returns NULL else. This 
was necessary, because else you could force grub-probe to print 'foobar' 
if run as 'grub-probe --target=device --device foobar'.

I consider this (i.e. adding a new option to grub-probe) a better 
solution than writing a separate tool only for this purpose.

The second file that I attached is the 30_os-prober script making use of 
the new grub-probe feature. Please note that the 'case ... in' part is 
only run if 'grub-probe --device' actually returns something usefull.

I am looking forward to your feedback.

Cheers,
Fabian

-- 
Dipl.-Phys. Fabian Greffrath

Ruhr-Universität Bochum
Lehrstuhl für Energieanlagen und Energieprozesstechnik (LEAT)
Universitätsstr. 150, IB 3/134
D-44780 Bochum

Telefon: +49 (0)234 / 32-26334
Fax:     +49 (0)234 / 32-14227
E-Mail:  greffrath at leat.ruhr-uni-bochum.de

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