Proposed truncate command attached
From 34b9bc72ffe70ec83710b12021e889d5ae65e508 Mon Sep 17 00:00:00 2001
From: =?utf-8?q?P=C3=A1draig=20Brady?= [EMAIL PROTECTED]
Date: Wed, 26 Mar 2008 14:03:31 +
Subject: [PATCH] Add new program: truncate
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Pádraig Brady [EMAIL PROTECTED] wrote:
Subject: [PATCH] Add new program: truncate
Nice!
Thanks for doing all that.
Here's a first pass:
- fix a typo s/tound/round/ : [EMAIL PROTECTED] = tound up to multiple of
- please indent using only spaces (no TABs) and add this at the end of
Paul Eggert [EMAIL PROTECTED] wrote:
Jim Meyering [EMAIL PROTECTED] writes:
If you don't mind truncating first, how about this?
true /var/spool/whatever/foo
dd bs=1 seek=2G of=/var/spool/whatever/foo /dev/null
Also, the latter command works even if the former command is omitted.
Jim Meyering wrote:
Paul Eggert [EMAIL PROTECTED] wrote:
Jim Meyering [EMAIL PROTECTED] writes:
If you don't mind truncating first, how about this?
true /var/spool/whatever/foo
dd bs=1 seek=2G of=/var/spool/whatever/foo /dev/null
Also, the latter command works even if the former
Russell Coker wrote:
On Tuesday 26 February 2008 21:03, Pádraig Brady [EMAIL PROTECTED] wrote:
That depends on your definition of works.
If you don't mind retaining the first 2GiB of content in
a preexisting output file, then it works fine. But the initial
truncation is required if you want
On Tuesday 26 February 2008 21:03, Pádraig Brady [EMAIL PROTECTED] wrote:
That depends on your definition of works.
If you don't mind retaining the first 2GiB of content in
a preexisting output file, then it works fine. But the initial
truncation is required if you want to be sure it's a
Jim Meyering wrote:
Russell Coker [EMAIL PROTECTED] wrote:
If I have a file that is 2G in size but wish to discard the last 1G of data
then there seems to be no program available to do this.
I think it would be ideal to have a program as part of coreutils that allows
you to resize a file.
Russell Coker wrote:
Bob Proulx wrote:
There is always 'head'.
head --bytes=1024m
That doesn't do what I want at all.
I knew you wouldn't be happy with it. :-) I did mention that it
copied the data twice for example. But it was an obvious program to
mention because it could be used
Russell Coker [EMAIL PROTECTED] wrote:
On Monday 25 February 2008 21:29, Pádraig Brady [EMAIL PROTECTED] wrote:
Russell if you want to push code to me it's fine,
but I was going to work on this tool anyway.
I don't have any code (yet). If you are going to work on it then I would be
more
On Monday 25 February 2008 21:29, Pádraig Brady [EMAIL PROTECTED] wrote:
Russell if you want to push code to me it's fine,
but I was going to work on this tool anyway.
I don't have any code (yet). If you are going to work on it then I would be
more than happy to leave it to you. I would be
On Mon, Feb 25, 2008 at 11:28:41AM +1100, Russell Coker wrote:
I would be happy to contribute the code for this. This will require some
discussion with upstream, but it seemed best to start the discussion here.
No, I'd start it upstream and try to solicit input from a wider base
than the
On Monday 25 February 2008 22:11, Jim Meyering [EMAIL PROTECTED] wrote:
One non-obvious feature request that I have is for a truncate on a
non-existant file to create it (similar to the way touch is commonly
used to create files).
The obvious question is then Why?
One specific case is
Russell Coker [EMAIL PROTECTED] wrote:
On Monday 25 February 2008 22:11, Jim Meyering [EMAIL PROTECTED] wrote:
One non-obvious feature request that I have is for a truncate on a
non-existant file to create it (similar to the way touch is commonly
used to create files).
The obvious
Jim Meyering [EMAIL PROTECTED] writes:
If you don't mind truncating first, how about this?
true /var/spool/whatever/foo
dd bs=1 seek=2G of=/var/spool/whatever/foo /dev/null
Also, the latter command works even if the former command is omitted.
That is, by itself, that invocation of
On Tuesday 26 February 2008 10:08, Paul Eggert [EMAIL PROTECTED] wrote:
dd bs=1 seek=2G of=/var/spool/whatever/foo /dev/null
Also, the latter command works even if the former command is omitted.
That is, by itself, that invocation of dd resizes
/var/spool/whatever/foo to 2 GiB,
Package: coreutils
Version: 5.97-5.3
Severity: wishlist
If I have a file that is 2G in size but wish to discard the last 1G of data
then there seems to be no program available to do this.
I think it would be ideal to have a program as part of coreutils that allows
you to resize a file. If the
Russell Coker wrote:
If I have a file that is 2G in size but wish to discard the last 1G of data
then there seems to be no program available to do this.
There is always 'head'.
head --bytes=1024m
But that does still perform 1G x 2 of I/O.
Let me guess. You have a partially downloaded
On Monday 25 February 2008 12:26, Bob Proulx [EMAIL PROTECTED] wrote:
There is always 'head'.
head --bytes=1024m
That doesn't do what I want at all. It creates a new file, which is an
entirely different thing, it uses temporary file space (in the above example
it won't work unless there
Russell Coker [EMAIL PROTECTED] wrote:
If I have a file that is 2G in size but wish to discard the last 1G of data
then there seems to be no program available to do this.
I think it would be ideal to have a program as part of coreutils that allows
you to resize a file. If the new length is
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