Date: Sat, 24 Jul 1999 15:12:46 +0200 (CEST) From: Oliver Fromme <olli@dorifer.heim3.tu-clausthal.de> To: freebsd-hackers@FreeBSD.ORG Subject: Re: Filesystem question... Message-ID: <199907241312.PAA16516@dorifer.heim3.tu-clausthal.de>
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Ronald G. Minnich wrote in list.freebsd-hackers:
> On Fri, 23 Jul 1999, Kris Kennaway wrote:
> > On Thu, 22 Jul 1999, Ronald G. Minnich wrote:
> > > Are you saying that as an ordinary user I can mount something on top of
> > > /tmp, for example?
> > If the vfs.usermount sysctl is 1, and you have appropriate access to the
> > thing you're trying to mount (block device, etc).
>
> OK, so let's say it is 1. Let's say I have "appropriate access" to /tmp. I
> mount my own fs on /tmp. I now have read/write access to everything anyone
> writes to /tmp.
Not possible. You have to _own_ the mount point (which is
usually not the case for /tmp).
> Or, let's say I don't have "appropriate access" to /tmp. Pick some other
> place. I mount my file system there for my files. Now everyone who wants
> can look for these user mounts and walk them at will. My private stuff is
> quite public.
You own it, so you can set the permission appropriately,
so nobody else can access it if you don't want that.
Regards
Oliver
--
Oliver Fromme, Leibnizstr. 18/61, 38678 Clausthal, Germany
(Info: finger userinfo:olli@dorifer.heim3.tu-clausthal.de)
"In jedem Stück Kohle wartet ein Diamant auf seine Geburt"
(Terry Pratchett)
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