Hi Heinrich,
On Fri, 22 Sept 2023 at 19:38, Heinrich Schuchardt xypron.glpk@gmx.de wrote:
On 9/23/23 00:13, Simon Glass wrote:
Hi Heinrich & Bin,
I'd like to be able to figure out in U-Boot what OS is on a USB stick. For example, with the Ubuntu installer, I can boot it (through grub), but I cannot see how to read anything useful from the USB stick that would indicate that it is Ubuntu, what version it is, etc.
Does U-Boot need an ISO9660-filesystem driver for that? Is there any other way?
With Debian I can see the actual files (linux and initrd) , so it is a bit easier.
Regards, SImon
U-Boot only needs to support reading the ESP to boot. GRUB comes with a 9660 driver.
Yes, but this is not about booting, it is about visibility into what is being booted. Perhaps Ubuntu could put some information in partition 2?
On Ubuntu server installer images linux and initrd are in directory casper/ in the ISO9660 file-system.
There is also a file dists/mantic/Release
$ cat dists/mantic/Release Origin: Ubuntu Label: Ubuntu Suite: mantic Version: 23.10 Codename: mantic Date: Tue, 19 Sep 2023 23:07:01 UTC Architectures: amd64 i386 Components: main restricted Description: Ubuntu Mantic 23.10 Acquire-By-Hash: yes
That would be useful info. Ideally we would have a standard format for this file across all distros, perhaps something that VBE can help with.
Regards, Simon