Re: Re[2]: chroot & mount --bind = security ?

sipior_at_science.uva.nl
Date: 04/11/04

  • Next message: Kirt S. Cathey: "Re: Re: chroot & mount --bind = security ?" 
    Date: Sun, 11 Apr 2004 16:59:45 +0200
To: focus-linux@securityfocus.com

    On Fri, Apr 09, 2004 at 05:21:44PM -0400, Scott Gifford wrote:
    > Most filesystems I've used are intolerant of hardlinks between
    > directories:
    >
    > [sgifford@sghome sgifford]$ ln tmp tmp2
    > ln: `tmp': hard link not allowed for directory
    >
    > The manpage on Linux says you can hardlink directories if you're
    > superuser, although I couldn't get the flags to work. On Solaris I've
    > created hardlinked directories before, but fsck destroyed them
    > whenever it ran, and I eventually used a solution much like the OP's.
    > IIRC, the manpage said directory hardlinks weren't recommended to
    > "prevent your directory tree from becoming an arbitrary mishmash."

    Specifically, hard links can cause cyclical references in your filesystem
    (if a subdirectory is hard linked to its parent, say). Since the reclaiming
    of disk resources is generally based upon the reference count, this can pose
    a problem :-)

    Cheers,

    Mike Sipior

  • Next message: Kirt S. Cathey: "Re: Re: chroot & mount --bind = security ?"