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Re: edif / create files from a grub module

From: Andrei Borzenkov
Subject: Re: edif / create files from a grub module
Date: Sat, 10 Dec 2016 20:26:57 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1

07.12.2016 00:03, Jean-Francois Le Breton пишет:
> Hello,
>      I would like to add some checks and modifications to the Linux command 
> line 
> before booting the OS.
>      So I am considering writing a grub module which will modify some 
> grub.cfg 
> parameters according to data retreived somewhere on dedicated hardware.
>       I just realized that it was not possible to write files (on EFI 
> partition 
> or EXT4 partition).
>       Is there an available patch to allow file modifications ?
>       I am using grubx64.efi + my module.

There is no write support in GRUB nor am I aware of any plans to add
one. The only limited possibility is overwriting of existing file using
blocklists as long as it resides on plain device (no RAID/volume

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