Date: Mon, 4 Nov 2002 16:18:53 +0100 From: Erik Trulsson <ertr1013@student.uu.se> To: freebsd-questions@FreeBSD.org Subject: Re: Re: non-writeable directory - can't be removed Message-ID: <20021104151853.GA8703@student.uu.se> In-Reply-To: <20021104150624.GC46132@keyslapper.org> References: <20021104145702.GB46132@keyslapper.org> <20021104145939.GA75425@arpa.com> <20021104150624.GC46132@keyslapper.org>
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On Mon, Nov 04, 2002 at 10:06:25AM -0500, Louis LeBlanc wrote: > On 11/04/02 08:59 AM, Chip Norkus sat at the `puter and typed: > > On Mon Nov 04, 2002; 09:57AM -0500 Louis LeBlanc propagated the following: > > > Hey all. I'm trying to get some temp files cleaned out, and the one > > > giving me trouble is /tmp/temproot/var/empty/ > > > > > > The empty directory is in fact empty, but the ownership and > > > permissions seem to make it impossible to remove it. I've tried rm > > > -rf, rm -df, and rmdir all as root, but all I get is: > > > # rm -df empty/ > > > rm: empty/: Operation not permitted > > > > > > > Try 'chflags noschg /tmp/temproot/var/empty' and then try removing it > > again. > > > Cool. That did the trick, but why would a directory be set > unwriteable *and* immutable? Like I said before, it seems it would > make the directory useless. Not quite. I think /var/empty is used for sshd to chroot into. This means that it needs to exist, but can be empty, and indeed *should* be empty to minimize security risks. That directory is unwriteable and immutable to make sure that it not only is empty but *stays* empty. Otherwise some unsuspecting sysadmin might remove it thinking it is unimportant, but this way said sysadmin will realize that there is *something* special about the directory. The directory in /tmp/temproot sounds like remains from a mergemaster run that didn't finish normally. (Since mergemaster normally cleans up after itself.) -- <Insert your favourite quote here.> Erik Trulsson ertr1013@student.uu.se To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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