From: Andries Brouwer <aebr@win.tue.nl>
To: Zack Brown <zbrown@tumblerings.org>
Cc: "Ata, John" <John.Ata@digitalnet.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: incompatible open modes
Date: Thu, 31 Jul 2003 19:35:58 +0200 [thread overview]
Message-ID: <20030731173558.GA2939@win.tue.nl> (raw)
In-Reply-To: <20030731170345.GJ6693@renegade>
> On Thu, Jul 31, 2003 at 12:09:14PM -0400, Ata, John wrote:
> > the manpage on "open" states that if a file is opened "O_RDONLY|O_TRUNC",
> > the O_TRUNC is either ignored or an error is returned. The 2.4 kernel
> > appears to cheerfully truncate the file on open. I wondered which
> > behavior is actually intended.
> >
> > O_TRUNC
> > If the file already exists and is a regular file and the open
> > mode allows writing (i.e., is O_RDWR or O_WRONLY) it will be
> > truncated to length 0.
> > Otherwise the effect of O_TRUNC is unspecified.
> > (On many Linux versions it will be ignored; on other versions
> > it will return an error.)
This was just recently discussed, and it became clear that the parenthetical
remark only led to confusion. It has been deleted. Instead
The (undefined) effect of O_RDONLY | O_TRUNC various among
implementations. On many systems the file is actually
truncated.
has been added.
Andries
next prev parent reply other threads:[~2003-07-31 17:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <6DED202D454D3B4EB7D98A7439218D610C9AB7@vahqex2.gfgsi.com>
2003-07-31 17:03 ` incompatible open modes Zack Brown
2003-07-31 17:35 ` Andries Brouwer [this message]
2003-07-31 18:29 Ata, John
2003-07-31 19:14 ` Richard B. Johnson
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