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Re: [PATCH] dd: do not unnecesarilly allocate memory for input block siz
From: |
Ondřej Vašík |
Subject: |
Re: [PATCH] dd: do not unnecesarilly allocate memory for input block size, when not needed |
Date: |
Fri, 22 May 2009 15:18:50 +0200 |
Pádraig Brady wrote:
> So that would not run skip(STDOUT_FILENO,...) if count==0.
> Would this break existing scripts that for example used
> this command to position a non seekable device?
>
> dd count=0 of=/dev/tape seek=1234
Thanks for objection, you are right, my patch seems to be not correct
way as it doesn't run that part and could break something. However - for
many cases (when file_size && offset < OFF_T_MAX and file seekable)
buffer allocation is not required in skip(), so it could be handled
somehow for those cases even without buffer allocation...
Greetings,
Ondřej
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