[syslinux] Determine from which device syslinux booted from

[Mattias Schlenker]

Am 30.09.2014 um 01:42 schrieb Don Cupp:
> Then again, I suppose you could have a script in your init that detects when it has been booted from a *special* UUID. In such cases it goes to the first instance of a volume with that *special* UUID and re-writes it to a genuine UUID, as well as updates the syslinux configs on the volume. You could then create your seed image with that *special* UUID and then even an XP user could write it to a thumb drive with DiskImage.

Just to back this suggestion: This is what I do in LessLinux. The ISO 
images are hybrid ISOs, but it was required to make a system installed 
on the USB drive upgradeable and not to lose the space not occupied by 
the ISO. So some initrams magic moves the ISO to the end of the device, 
creates a partition for it and boot partitions (one for UEFI, one for 
BIOS). Then the UUID of the filesystem is determined and written to the 
extlinux.conf to identify the boot device. Since the UUID is unique 
there are no problems when more than one thumbdrive with LessLinux is 
present.

Yours,
Mattias

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Mattias Schlenker - Redaktion + EDV-Beratung + Linux-CD/DVD-Konzepte
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