From mboxrd@z Thu Jan 1 00:00:00 1970 From: Markus =?utf-8?Q?Klotzb=C3=BCcher?= Date: Wed, 13 Feb 2008 13:55:26 +0100 Subject: [U-Boot-Users] Delete all env vars except read onlys In-Reply-To: (Detlev Zundel's message of "Wed\, 13 Feb 2008 12\:13\:08 +0100") References: <200802120944.42632.matthias.fuchs@esd-electronics.com> <200802130921.38894.matthias.fuchs@esd-electronics.com> <87abm5jhst.fsf@denx.de> <200802131113.08367.sr@denx.de> <87ve4ti1rr.fsf@denx.de> Message-ID: <87tzkdqam9.fsf@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Detlev Zundel writes: >> Stefan Roese writes: >> >>> On Wednesday 13 February 2008, Markus Klotzb?cher 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 Klotzb?cher -- 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 at denx.de