[U-Boot-Users] Delete all env vars except read onlys

Matthias Fuchs
2008-02-13T08:21:38Z

Hi Stefan,

what about a 'scrubenv' or 'cleanenv' command that tries to unset all
variables leaving readonlys untouched.

The command could request a confirmation:

=> scrubenv
Do you really want to do this ('yes' or 'no')? yes
Can't overwrite "serial#"
Can't overwrite "ethaddr"
=> saveenv

The above output is faked. So I did not start coding :-)

What do you think?

Matthias

On Tuesday 12 February 2008 15:49, Stefan Roese wrote:
> Hi Matthias,
>
> On Tuesday 12 February 2008, Matthias Fuchs wrote:
> > I am wondering if there is a way to delete all environment variables
> > but not the readonly ones. The common way to delete all variables
> > is to make the environment CRC invalid an do a reset. After reset
> > a saveenv saves a default environment.
> >
> > What I want to do is to delete all variables (preferable from an autoscr
> > script) but not the vendor variables like serial# and eth?addr.
> >
> > Wildcards in the setenv parameters would solve this issue,
> > but chars like '*' or '?' are valid chars for environment variables.
> >
> > Any idea?
>
> I don't know of such a solution. But such a "feature" would be handy
> sometimes. So perhaps this needs to get implemented as a new U-Boot command.
> But you should be careful. Such a command should require probably a password,
> to that users don't unintentionally erase their environment.
>
> Best regards,
> Stefan