Date: Wed, 04 Oct 2000 12:23:57 -0600 From: Warner Losh <imp@village.org> To: Jordan Hubbard <jkh@winston.osd.bsdi.com> Cc: nate@yogotech.com (Nate Williams), freebsd-hackers@FreeBSD.ORG Subject: Re: Automatic updates (was Re: How long for -stable...) Message-ID: <200010041823.MAA38586@harmony.village.org> In-Reply-To: Your message of "Wed, 04 Oct 2000 11:14:58 PDT." <92172.970683298@winston.osd.bsdi.com> References: <92172.970683298@winston.osd.bsdi.com>
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In message <92172.970683298@winston.osd.bsdi.com> Jordan Hubbard writes: : > I think that we can do a lot with cvsupd. I've used cvsupd to grab : > binaries on an experimental basis and it seems to work great. I've : : Hmmm. Does cvsupd also move a target out of the way if it already : exists and it's in the process of replacing it? What if the target is : chflag'd but can be unprotected at the current security level? : : What I'm trying to say is that if you have "/sbin/init" and cvsupd is : about to replace it, I would expect the steps to be something like : this: : : Receive new init as /sbin/init.${pid} (or something) : | : |<--------------------------------------------+ : | Yes |Yes : \/ No | No : Mv /sbin/init.${pid} /sbin/init --> chflags noschg /sbin/init --> Fail : | : | Yes : \/ : Done : : If cvsupd does that or can be gimmicked to do that (add : --potentially-hose-me flag? ;) then I'd say it's a serious : contender for being part of a binary update process. I don't know. I seem to recall that jdp told me at the talk I gave last year that it just wipes the flags completely and doesn't honor them. I think it deals well with this, but I've not tried to replace init on a running system. Given that the Pluto upgrade went well, I'd expect the answer is yes, it works. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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