Re: O_NOLINK for open()

[Al Viro]

On Wed, Sep 12, 2007 at 05:44:30PM -0500, Brent Casavant wrote:

> P.S. By the way, there doesn't seem to be a way to remove /proc/#/mem
>      files.  That might be an additional nicety -- programs worried about
>      being snooped could unlink their own entry.  /dev/mem and /dev/kmem
>      can simply be removed by the sysadmin of such a system.  If all of
>      that were done you'd have to resort to attacking crash dumps, core
>      dumps, or via something like kdb to extract "hidden" data.

Give me a break.  And learn about ptrace(2).  This "unlinking" bullshit
buys you zero additional security, both for /proc/*/mem and for /dev/mem
(see mknod(2)).
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