From: "Dmitry V. Levin" <ldv@altlinux.org>
To: ALT Devel discussion list <devel@lists.altlinux.org>
Subject: Re: [devel] Почему чтение из R/O /dev/loop* меняет исходный файл?
Date: Tue, 8 Nov 2011 16:43:52 +0400
Message-ID: <20111108124352.GA1693@altlinux.org> (raw)
In-Reply-To: <1320754703.28840.4@ildar.innovations.kz>
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On Tue, Nov 08, 2011 at 06:18:23PM +0600, Ildar Mulyukov wrote:
> Коллеги,
> не могу разобраться, это нормально или
> нет?
> $ sudo dd bs=1M seek=100 count=0 of=file
> 0+0 records in
> 0+0 records out
> 0 bytes (0 B) copied, 2.2506e-05 s, 0.0 kB/s
> $ sudo losetup /dev/loop0 file
Уже на этой стадии file изменится, если не сделать losetup -r.
> $ du -h file
> 344K file
> $ sudo chmod a+r /dev/loop0
> $ cat /dev/loop0 > /dev/null
> $ du -h file
> 101M file
Это происходит и в случае использования losetup -r.
--
ldv
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next prev parent reply other threads:[~2011-11-08 12:43 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-08 12:18 Ildar Mulyukov
2011-11-08 12:43 ` Dmitry V. Levin [this message]
2011-11-10 9:59 ` Ildar Mulyukov
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