[elbe-devel] How to retrieve files with mutable names from initvm?

[Lukasz Walewski]

Hi,

I build my RFS using initvm. Elbe generates a SquashFS image as requested in my XML input. Before such an image can be mounted as root filesystem on my target device, it needs a kernel to boot, and an initramfs to mount the partition where the image is stored. I use my own kernel (with third party drivers) that is stored in a local mirror. The initramfs must be generated for this very kernel, so I install it with my <pkg-list> and run mkinitramfs in <finetuning>. Then, apart from the RFS image itself, I need to retrieve the two artifacts: the kernel and the initramfs, and pass them to my bootloader (syslinux) in order for him to boot my target. This is easily done using "elbe control get_file" as soon as you know the filenames. Unfortunately, the filenames I am interested in contain the version number of the kernel:

vmlinuz-<version>-<arch>
initrd.img-<version>-<arch>

Needless to say, the <version> changes over time. Now, how can I retrieve those files programmatically without making any assumptions on the <version>?

I dimly remember there was some development towards wildcard support in elbe file operations but it's not documented (man elbe-control, https://elbe-rfs.org/docs/sphinx/elbe-control.html). If possible, I would also like to stay compatible with elbe 1.2, which might still be used by some of my vendors.

How do you guys handle such a use case in general? Maybe there is a better/simpler way?

Best regards,
Lukasz

PS This question is probably best suited for elbe-users, but there are not that many subscribers yet, so CCing to elbe-devel.


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