On 06/17/2010 07:22 PM, Michael Prokop wrote:
- T o n g mlist4suntong@yahoo.com [Thu Jun 17, 2010 at 05:14:40PM +0000]:
On Tue, 15 Jun 2010 17:38:59 +0200, Alexander 'Leo' Bergolth wrote:
I'd like to use the loopback feature of grub2 to boot a grml iso-image that resides on a USB drive.
IIRC, mika wrote about it in his blog, http://grml.supersized.org/ Hmm..., no, maybe somewhere else, 'cause searching loopback didn't help.
I wrote: http://michael-prokop.at/blog/2009/05/25/boot-an-iso-via-grub2/
And for the german speaking people, Marc Haber wrote about it as well: http://blog.zugschlus.de/archives/825-grml-als-eigenes-Rescuesystem.html
I know about those articles but my question was another one:
Is there a way to make grub jump to the existing /boot/grub/grub.cfg in the ISO and show its contents as a submenu?
I am trying to branch to grmls own grub configuration: -------------------- 8< -------------------- loopback loop $iso_path set root=(loop) configfile /boot/grub/grub.cfg -------------------- 8< --------------------
... which seems to fail because of a bug in grub. (set root=(loop) fails) See http://savannah.gnu.org/bugs/?30143 for the bug report.
As a workaround, I suggested to prepend a variable like ${loop} to all paths in grmls grub.conf, which could be set to loop="(loop)" by the calling grub.cfg on the usb drive. Besides a variable like ${kernelopts} at the end of each kernel commandline would allow passing custom boot options from the calling grub.cfg.
Cheers, --leo