Reading from ISO9660 in U-Boot

[Simon Glass]

Hi Heinrich,

On Sat, 23 Sept 2023 at 12:41, Heinrich Schuchardt <xypron.glpk at gmx.de> wrote:
>
>
>
> Am 23. September 2023 16:36:32 MESZ schrieb Simon Glass <sjg at chromium.org>:
> >Hi Heinrich,
> >
> >On Fri, 22 Sept 2023 at 19:38, Heinrich Schuchardt <xypron.glpk at 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.
>
> What problem do you want to solve? During installation you should know what you have downloaded.
>
> Afterwards UEFI boot options should receive reasonable labels.

I want to show it in the U-Boot boot menu.

Regards,
Simon

>
> Best regards
>
> Heinrich
>
>
> >
> >Regards,
> >Simon