From: Benjamin Riefenstahl <Benjamin.Riefenstahl@epost.de>
Subject: Re: Reading portions of large files
Date: 20 Jan 2003 13:46:53 +0100 [thread overview]
Message-ID: <m3fzroq98i.fsf@cicero.benny.turtle-trading.net> (raw)
In-Reply-To: m3n0lyhnxr.fsf@mika.informatik.uni-freiburg.de
Hi,
> [attribution cut off]
> >> head -c2000 bigfile > header-to-be-edited
> >> tail -c+2001 bigfile > the-rest
> >> [...]
> >>>>> "Benjamin" == Benjamin Riefenstahl <Benjamin.Riefenstahl@epost.de>
> writes:
> Benjamin> This assumes a) Unix, b) that you have the space and
> Benjamin> time ;-) to deal with the large temporary files.
Lee Sau Dan <danlee@informatik.uni-freiburg.de> writes:
> (b) is assumed even if you use other method.
With something like the dd method I don't ever have to copy the whole
file. Makes a difference when your file is a CD image of 600 MB and
all you want to do is patch the partition table.
> Time? It doesn't take much time to 'split' and 'cat'.
It takes several minutes on my machine with the mentioned file.
> Why not 'split'?
I didn't think of that one before. But it also copies the whole
file.
> There are hex editors which doesn't need to load the whole file into
> memory.
I'm not aware of a commonly used hex editor on Unix. Do you have a
recommendation?
so long, benny
next prev parent reply other threads:[~2003-01-20 12:46 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.100.1042135372.21513.help-gnu-emacs@gnu.org>
2003-01-09 18:20 ` Reading portions of large files David Kastrup
2003-01-10 19:21 ` Eli Zaretskii
[not found] ` <mailman.153.1042230313.21513.help-gnu-emacs@gnu.org>
2003-01-10 20:51 ` David Kastrup
2003-01-11 8:51 ` Eli Zaretskii
[not found] ` <mailman.169.1042278925.21513.help-gnu-emacs@gnu.org>
2003-01-11 10:42 ` David Kastrup
2003-01-12 20:38 ` Stefan Monnier <foo@acm.com>
2003-01-13 7:40 ` Miles Bader
2003-01-13 7:42 ` Miles Bader
2003-01-13 7:55 ` David Kastrup
2003-01-13 8:05 ` Miles Bader
2003-01-20 7:50 ` Lee Sau Dan
2003-01-24 7:55 ` Mac
2003-01-27 14:44 ` Stefan Monnier <foo@acm.com>
2003-01-10 16:27 ` Eric Pement
2003-01-10 17:16 ` Brendan Halpin
2003-01-10 20:35 ` Benjamin Riefenstahl
2003-01-11 10:25 ` Klaus Berndl
2003-01-20 7:50 ` Lee Sau Dan
2003-01-20 12:46 ` Benjamin Riefenstahl [this message]
2003-01-20 7:50 ` Lee Sau Dan
2003-01-09 15:45 Gerald.Jean
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