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.
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
Best regards
Heinrich