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To: linux-kernel@vger.kernel.org
From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: futimes()?
Date: 3 Feb 2003 11:07:15 -0800
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References: <b1htmi$9r6$1@cesium.transmeta.com> <20030202120752.GK5239@riesen-pc.gr05.synopsys.com>
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Followup to:  <20030202120752.GK5239@riesen-pc.gr05.synopsys.com>
By author:    Alex Riesen <alexander.riesen@synopsys.COM>
In newsgroup: linux.dev.kernel
>
> H. Peter Anvin, Sun, Feb 02, 2003 02:53:22 +0100:
> > In the general vein of avoiding security holes by using file
> > descriptors when doing repeated operations on the same filesystem
> > object, I have noticed that there doesn't seem to be a way to set
> > mtime using a file descriptor.  Do we need a futimes() syscall?
> 
> There is a small problem with close(). It can update mtime as well.
> 

Presumably it shouldn't unless the file descriptor has been written
to since the last fsync().

	-hpa
-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
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