Date: Sat, 2 Oct 2004 16:12:11 -0400 From: David Schultz <das@FreeBSD.ORG> To: Michael Reifenberger <mike@Reifenberger.com> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Protection from the dreaded "rm -fr /" Message-ID: <20041002201211.GA1677@VARK.MIT.EDU> In-Reply-To: <20041002211759.R24332@fw.reifenberger.com> References: <20041002081928.GA21439@gothmog.gr> <20041002102918.W22102@fw.reifenberger.com> <20041002185055.GA1029@VARK.MIT.EDU> <20041002211759.R24332@fw.reifenberger.com>
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On Sat, Oct 02, 2004, Michael Reifenberger wrote: > On Sat, 2 Oct 2004, David Schultz wrote: > ... > >Do you also want to be able to swap to the root partition while > >it's mounted? We can bring back that feature, too. But > >personally, I don't see anything wrong with the view that > >operations that are guaranteed to shoot people in the foot should > >be disallowed. > > > > Every anti foot shooting takes time to check for. > A strncmp for every arg is maybe ok. Traversing the tree for realpath is > not. > The job for `rm` is to remove whatever it is given to get removed. > As fast as possible. Nothing else. Sigh. The original patch that just used strcmp() wouldn't have increased the time to execute rm by more than a few hundred nanoseconds.
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