Hi!
I'd like to use the loopback feature of grub2 to boot a grml iso-image that resides on a USB drive.
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 thinking about something like:
/boot/grub/grub.cfg on USB drive: -------------------- 8< -------------------- menuentry 'GRML' { iso_path=/iso/grml_2010.04.iso bootid=grml201004 export iso_path export bootid
loopback loop $iso_path set root=(loop) configfile /boot/grub/grub.cfg } -------------------- 8< --------------------
Unfortunately, when selecting the menuantry above, my box reboots.
When trying the same on the grub commandline, it reboots at "set root=(loop)". So root=loop doesn't seem to be supported...
On the other hand, "configfile (loop)/boot/grub/grub.cfg" perfectly jumps to grmls boot menu. But when using this approach, I guess some support in grml's grub.cfg would be needed so that grub can correctly locate the image files. (Maybe a $loop variable prepended to all filenames in grmls grub.cfg, which is conditionally set to "(loop)"?)
Any other hints?
Cheers, --leo