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Re: [PATCH] Save/Load environment variable support

From: Robert Millan
Subject: Re: [PATCH] Save/Load environment variable support
Date: Sat, 14 Jun 2008 20:47:57 +0200
User-agent: Mutt/1.5.13 (2006-08-11)

On Fri, Jun 13, 2008 at 03:07:54PM +0800, Bean wrote:
> Hi,
> I separate the save/load environment variable function from my
> previous patch on environment block. It contains the command
> save_env/load_env/list_env and tool grub-editenv, but without the
> kernel patch.
> -- 
> Bean

> diff --git a/commands/loadenv.c b/commands/loadenv.c
> new file mode 100755
> index 0000000..970baf3
> --- /dev/null
> +++ b/commands/loadenv.c
> @@ -0,0 +1,250 @@
> +/* loadenv.c - command to load/save environment variable.  */

Is this useful as a standalone command?  If we're in a stage in which commands
can be executed, the same effect could be archieved with the "." command on
a grub.cfg-like formatted file?

IIRC you explained that this feature could be useful as the basis for
findroot style search, or to override existing variables like "root", "prefix"
or "default".  In both cases (if I understood correctly) you want it to be run
automaticaly as the init routine for your module.

However if your code is small enough, maybe it could replace the existing
use of grub_prefix (I commented this on the other mail), thereby reducing
kernel size and making it preferable to be part of kernel than a separate
module.  Do you think that's possible?

Robert Millan

<GPLv2> I know my rights; I want my phone call!
<DRM> What good is a phone call… if you are unable to speak?
(as seen on /.)

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