Is there an EFI configuration file?

[timkgh]

Looking at a system set up with Grub, there's /boot/efi/EFI/ubuntu/grub.cfg next to grubx64.efi

Is a similar file available or necessary for ZBM EFI or is the only way to configure it by editing the .cmdline section of the ZBM EFI executable, using zbm-kcl?

If there is no config file, what is the reasoning behind it? I think it would be easier to just edit a config file than run the tool to modify the executable.

[classabbyamp]

zbm-kcl is the way to edit the commandline for a zbm EFI, yes

there is a configuration file that stores the commandline for zbm if you're buildling your own images, but keeping everything self-contained in the ESP is desirable feature for us (this also means it's very portable - you only have to keep track of 1 file)

[zdykstra]

The ZFSBootMenu core is just a Linux kernel. We've chosen to use the kernel command line (KCL) as the way to configure the behavior of ZFSBootMenu. For the pre-built EFI releases, the EFI stub loader looks to the .cmdline section in the bundle for that configuration. Otherwise if you use rEFInd it can pass arbitrary command lines in to the EFI bundle or to a bare kernel/initramfs.

Configuration files in the same vein as grub.cfg on an ESP are not planned.

[timkgh]

It makes sense, though it makes upgrades a little different from what people may be used to. Instead of just downloading and copying a new EFI file and keeping an existing config file, the EFI needs to first be modified (using zbm-kcl).