linux-kernel - Re: Sysctl syscall

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Message-Id: <200611171007.57596.hasso@estpak.ee>
Date:	Fri, 17 Nov 2006 10:07:57 +0200
From:	Hasso Tepper <hasso@...pak.ee>
To:	Andi Kleen <ak@...e.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Sysctl syscall

Andi Kleen wrote:
> Hasso Tepper <hasso@...pak.ee> writes:
> > 2.4 and 2.6 kernels and would work with capabilities
> > (sys/capability.h)? Accessing `/proc/sys' directly isn't such
> > alternative as it doesn't work with capabilities.
>
> What do you mean with "/proc/sys doesn't work with capabilities"?

I have process which drops root privileges after startup and retains only 
some privileges using CAP_NET_ADMIN and CAP_SYS_ADMIN capabilities.
I can change values in /proc/sys/net/ipv[46]/* (like turning forwarding 
on/off) from this process using sysctl syscall, but I can't write 
directly into /proc/sys/net/ipv[46]/* from it.


regards,
 
-- 
Hasso Tepper
Elion Enterprises Ltd. [AS3249]
Data Communication Network Administrator
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