Hi,
I'm think about the following implementation, please see if it's all right.
Config information is saved in a file named `defaults' in the grub
directory, it's format is something like this:
GRUBENV \0
key1=value1 \0
key2=value2 \0
...
keyN=valueN \0 \0
This file should be at least 8192 bytes, this should be ok for most file system.
In grub2, we use load_exports to load global variables, and
save_exports to save them. For example:
load_exports
menuentry "aa" {
default=0
export default
save_exports
}
menuentry "bb" {
default=1
export default
save_exports
}
we can also add a new tool such as grub-editenv to edit the config file.
--
Bean
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