linux-kernel - Re: [PATCH 0/2] vfs: Define new syscall getumask.

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Message-ID: <570E35F5.90002@virtuozzo.com>
Date:	Wed, 13 Apr 2016 15:05:09 +0300
From:	Pavel Emelyanov <xemul@...tuozzo.com>
To:	"Richard W.M. Jones" <rjones@...hat.com>,
	<linux-kernel@...r.kernel.org>
CC:	<tglx@...utronix.de>, <mingo@...hat.com>, <hpa@...or.com>,
	<akpm@...ux-foundation.org>, <luto@...nel.org>,
	<viro@...iv.linux.org.uk>, <mathieu.desnoyers@...icios.com>,
	<zab@...hat.com>, <emunson@...mai.com>,
	<paulmck@...ux.vnet.ibm.com>, <aarcange@...hat.com>,
	<josh@...htriplett.org>, <xemul@...allels.com>,
	<sfr@...b.auug.org.au>, <milosz@...in.com>, <rostedt@...dmis.org>,
	<arnd@...db.de>, <ebiederm@...ssion.com>, <gorcunov@...nvz.org>,
	<iulia.manda21@...il.com>, <dave.hansen@...ux.intel.com>,
	<mguzik@...hat.com>, <adobriyan@...il.com>, <dave@...olabs.net>,
	<linux-api@...r.kernel.org>
Subject: Re: [PATCH 0/2] vfs: Define new syscall getumask.

On 04/13/2016 02:43 PM, Richard W.M. Jones wrote:
> It's not possible to read the process umask without also modifying it,
> which is what umask(2) does.  A library cannot read umask safely,
> especially if the main program might be multithreaded.
> 
> This patch series adds a trivial system call "getumask" which returns
> the umask of the current process.

Ah! Thanks for this :)

Acked-by: Pavel Emelyanov <xemul@...tuozzo.com>