From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sunil Mushran <sunil.mushran@oracle.com>
Subject: Re: ext4 - getting at birth time (file create time) and
	getting/setting nanosecond time stamps and utime
Date: Tue, 20 Oct 2009 15:16:13 -0700
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Cc: jim owens <jowens@hp.com>, linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	Andreas Dilger <adilger@sun.com>,
	samba-technical <samba-technical@lists.samba.org>
To: Steve French <smfrench@gmail.com>
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Steve French wrote:
> On Tue, Oct 20, 2009 at 4:49 PM, Sunil Mushran <sunil.mushran@oracle.com> wrote:
>> Steve French wrote:
>>> On Tue, Oct 20, 2009 at 4:23 PM, Sunil Mushran <sunil.mushran@oracle.com>
>>> wrote:
>>>
>>>> If you are trying to update it, you can use utimensat(2).
>>>>
>>> Looks like that should work based on what I see in fs/utimes.c ... but
>>> I have heard from two that think it doesn't work, so time to test it
>>> ... (unfortunately
>>> the libc is not new enough on this system ... ugh).
>
> strace shows that touch on my ubuntu system still calls utimesat
> (touch --version displays v6.10 2008).   What version of touch are you
> running?
$ touch --version
touch (GNU coreutils) 6.10

I am running the same and it calls utimensat(). Time to look at the source.