From: Larry McVoy <lm@bitmover.com>
To: Ingo Oeser <ingo.oeser@informatik.tu-chemnitz.de>
Cc: Bob McElrath <mcelrath+linux@draal.physics.wisc.edu>,
linux-kernel@vger.kernel.org
Subject: Re: Editing-in-place of a large file
Date: Sun, 2 Sep 2001 17:59:38 -0700 [thread overview]
Message-ID: <20010902175938.D21576@work.bitmover.com> (raw)
In-Reply-To: <20010902152137.L23180@draal.physics.wisc.edu> <20010902233008.Q9870@nightmaster.csn.tu-chemnitz.de>
In-Reply-To: <20010902233008.Q9870@nightmaster.csn.tu-chemnitz.de>; from ingo.oeser@informatik.tu-chemnitz.de on Sun, Sep 02, 2001 at 11:30:08PM +0200
> What's needed is a generalisation of sparse files and truncate().
> They both handle similar problems.
how about
fzero(int fd, off_t off, size_t len)
which zeros the blocks and if it can creates a holey file?
However, that's not what Bob wants, he wants to remove commercials from
recorded TV. So what he wants is
fdelete(int fd, off_t off, size_t len)
which has the semantics of shifting the rest of the file backwards to "off".
The main problem with this is if the off/len are not block aligned. If they
are, then this is just block twiddling, if they aren't, then this is a file
rewrite anyway.
--
---
Larry McVoy lm at bitmover.com http://www.bitmover.com/lm
next prev parent reply other threads:[~2001-09-03 0:59 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-02 20:21 Editing-in-place of a large file Bob McElrath
2001-09-02 21:28 ` COW fs (Re: Editing-in-place of a large file) VDA
2001-09-09 14:46 ` John Ripley
2001-09-09 16:30 ` John Ripley
2001-09-09 17:41 ` Xavier Bestel
2001-09-10 1:29 ` John Ripley
2001-09-10 6:45 ` Ragnar Kjørstad
2001-09-14 10:06 ` Pavel Machek
2001-09-10 11:11 ` Ihar Filipau
2001-09-10 16:10 ` Kari Hurtta
2001-09-10 2:43 ` Daniel Phillips
2001-09-10 2:58 ` David Lang
2001-09-10 9:28 ` VDA
2001-09-10 9:35 ` John P. Looney
2001-09-14 10:03 ` Pavel Machek
2001-09-02 21:30 ` Editing-in-place of a large file Ingo Oeser
2001-09-03 0:59 ` Larry McVoy [this message]
2001-09-03 1:24 ` Ingo Oeser
2001-09-03 1:31 ` Alan Cox
2001-09-03 1:50 ` Ingo Oeser
2001-09-03 10:48 ` Alan Cox
2001-09-03 14:31 ` Daniel Phillips
2001-09-03 14:46 ` Bob McElrath
2001-09-03 14:54 ` Alan Cox
2001-09-03 15:42 ` Doug McNaught
2001-09-03 15:11 ` Richard Guenther
2001-09-03 21:19 ` Ben Ford
2001-09-03 4:27 ` Bob McElrath
2001-09-03 1:30 ` Daniel Phillips
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