From: Christoph Hellwig <hch@infradead.org>
To: Felix Janda <felix.janda@posteo.de>
Cc: xfs@oss.sgi.com
Subject: Re: [PATCH 2/6] libxfs/linux.c: Replace use of ustat by stat
Date: Tue, 12 Jan 2016 23:55:01 -0800 [thread overview]
Message-ID: <20160113075501.GC21939@infradead.org> (raw)
In-Reply-To: <20160112195945.GC568@nyan>
On Tue, Jan 12, 2016 at 08:59:45PM +0100, Felix Janda wrote:
> ustat has been used to check whether a device file is mounted.
> The function is deprecated and not supported by uclibc and musl.
> Now do the check using the *mntent functions.
>
> Based on patch by Natanael Copa <ncopa@alpinelinux.org>.
>
> Signed-off-by: Felix Janda <felix.janda@posteo.de>
ustat is a lot more efficient in checking for the mountedness
than this loop, so I'd really prefer not to do this unconditionally.
As far as Linux is concerned the best thing we could do is to use
O_EXCL for any open of a device file, as Linux overloadds O_EXCL
behavior for block devices so that any other O_EXCL open will
be rejected if one has the file open.
But that might be a major pain to find into the cross platform
framework..
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next prev parent reply other threads:[~2016-01-13 7:55 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1452627740.git.felix.janda@posteo.de>
2016-01-12 19:59 ` [PATCH 1/6] Move from __uint*_t types to uint*_t and likewise for __int*_t Felix Janda
2016-01-12 21:24 ` Dave Chinner
2016-01-12 21:46 ` Felix Janda
2016-01-12 22:02 ` Dave Chinner
2016-01-13 7:48 ` Christoph Hellwig
2016-01-20 0:46 ` Dave Chinner
2016-01-12 19:59 ` [PATCH 2/6] libxfs/linux.c: Replace use of ustat by stat Felix Janda
2016-01-12 21:24 ` Dave Chinner
2016-01-12 21:33 ` Felix Janda
2016-01-13 7:55 ` Christoph Hellwig [this message]
2016-01-13 17:42 ` Felix Janda
2016-01-14 10:20 ` Christoph Hellwig
2016-01-14 19:07 ` Felix Janda
2016-06-18 14:53 ` Felix Janda
2016-06-22 12:59 ` Christoph Hellwig
2016-09-04 1:23 ` Eric Sandeen
2016-09-08 0:00 ` Dave Chinner
2016-01-12 19:59 ` [PATCH 3/6] fsr/xfs_fsr.c: Include <paths.h> for _PATH_MOUNTED Felix Janda
2016-01-13 7:55 ` Christoph Hellwig
2016-01-12 20:00 ` [PATCH 4/6] linux.h: Use off64_t instead of loff_t Felix Janda
2016-01-13 7:55 ` Christoph Hellwig
2016-01-12 20:00 ` [PATCH 5/6] include/linux.h: Include <stdio.h> for fprintf and stderr Felix Janda
2016-01-13 7:55 ` Christoph Hellwig
2016-01-12 20:00 ` [PATCH 6/6] Add configure check for members of dirent for use in io/readdir.c Felix Janda
2016-01-12 21:30 ` Dave Chinner
2016-01-12 21:37 ` Felix Janda
2016-01-12 22:37 ` Dave Chinner
2016-01-13 7:58 ` Christoph Hellwig
2016-01-13 17:09 ` Felix Janda
2016-01-14 10:17 ` Christoph Hellwig
2016-01-14 19:06 ` Felix Janda
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