Detlev Zundel dzu@denx.de writes:
Stefan Roese sr@denx.de writes:
On Wednesday 13 February 2008, Markus Klotzbücher wrote:
=> scrubenv Do you really want to do this ('yes' or 'no')? yes
Such a confirmation is not very Unix-like and will prevent this command to be used in scripts. I like the idea of a scrubenv/resetenv command but vote for leaving out the confirmation.
U-Boot provides many, much more serious ways to blow you foot off which don't ask such questions.
Sure. But not by "just" typing one command. Or at least I don't know those kind of destructive commands.
It need not be a single one, it could be a script. For instance, I once ran an "update" script without checking that _my_ version of U-Boot would be used. It used some ancient version which turned the board (temporarily) into a doorstop.
Stupid? Yes! But would such checks (e.g. to "mw") have avoided the problem? I doubt it. Probably I'd just have typed "yes" without checking.
BTW, after accidentally erasing the environment variables U-Boot will (likely) still start up, so it's really not that critical, is it?
Why not do both? Unix untilities do it sometimes this way: Use an interactive check for "scrubenv" but allow "scrubenv -force" not to ask. As many of the U-Boot users know Unix, this would follow from the "principle of least surprise"...
Yeah, why not both. That's fine with me!
Best regards
Markus Klotzbücher
-- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office@denx.de