linux-kernel - Re: FW: FW: mq

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Message-ID: <87k4o4c9th.fsf@basil.nowhere.org>
Date:	Fri, 06 Aug 2010 12:30:34 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	"Berger\, Lutz \(External\)" <Lutz.Berger.External@...s.com>
Cc:	<linux-kernel@...r.kernel.org>,
	"Denninghoff\, Sven Dr. \(External\)" 
	<Sven.Denninghoff.External@...s.com>,
	"Maehner\, Herbert \(External\)" <Herbert.Maehner.External@...s.com>
Subject: Re: FW: FW: mq_open

"Berger, Lutz (External)" <Lutz.Berger.External@...s.com> writes:

>  
> Hello gentleman,
>
> we have a problem with 
> mq_open, shm_open and sem_open
>
> As stated in the manpage of "open(2)",  the
>   permissions of the created file are (mode & ~umask).
>
> But what is the use of the mode parameter, it it is not used like the programmers intention?
> On HP Unix or TRU64 the mode parameter is not modified.
>
> Could you please check, if this is a bug or a faulty system design on linux? 

Whatever it is -- it would be dangerous to change because suddenly
ignoring umask could add security problems to existing software.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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