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Re: Bug#467378: coreutils: Please include a program to truncate files
From: |
Pádraig Brady |
Subject: |
Re: Bug#467378: coreutils: Please include a program to truncate files |
Date: |
Tue, 26 Feb 2008 11:59:04 +0000 |
User-agent: |
Thunderbird 2.0.0.6 (X11/20071008) |
Russell Coker wrote:
> On Tuesday 26 February 2008 21:03, Pádraig Brady <address@hidden> 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 big sparse
>>> file with nothing but NUL bytes.
>>>
>>> Try this:
>>>
>>> echo foo > k
>>> dd bs=1 seek=2G of=k < /dev/null
>>> head -c4 k
>>>
>>> and note that it prints "foo\n".
>> That's how I would expect it to work,
>> and is how I'm currently implementing it.
>> Given the name "truncate" I think this
>> operation should be obvious to users.
>
> What exactly do you mean by "how I expect it to work", do you mean "reducing
> the file size" or "removing all content and extending it to size N"? The
> latter is not truncation, it's replacement.
Exactly. I expect it to work as per Jim's example above.
I.E. truncate rather than replace.
Pádraig.
- Re: Bug#467378: coreutils: Please include a program to truncate files, (continued)
- Re: Bug#467378: coreutils: Please include a program to truncate files, Pádraig Brady, 2008/02/25
- Re: Bug#467378: coreutils: Please include a program to truncate files, Russell Coker, 2008/02/25
- Re: Bug#467378: coreutils: Please include a program to truncate files, Jim Meyering, 2008/02/25
- Re: Bug#467378: coreutils: Please include a program to truncate files, Russell Coker, 2008/02/25
- Re: Bug#467378: coreutils: Please include a program to truncate files, Jim Meyering, 2008/02/25
- Re: Bug#467378: coreutils: Please include a program to truncate files, Paul Eggert, 2008/02/25
- Re: Bug#467378: coreutils: Please include a program to truncate files, Russell Coker, 2008/02/25
- Re: Bug#467378: coreutils: Please include a program to truncate files, Jim Meyering, 2008/02/26
- Re: Bug#467378: coreutils: Please include a program to truncate files, Pádraig Brady, 2008/02/26
- Re: Bug#467378: coreutils: Please include a program to truncate files, Russell Coker, 2008/02/26
- Re: Bug#467378: coreutils: Please include a program to truncate files,
Pádraig Brady <=