Subject: Re: dd and pipe question
To: der Mouse <mouse@Collatz.McRCIM.McGill.EDU>
From: Travis Hassloch x231 <travis@EvTech.com>
Date: 04/15/1996 16:31:29
In message <199604111214.IAA03454@Collatz.McRCIM.McGill.EDU> you write:
> Yes. dd is not the right tool here. The effect you want can be
> expressed as "dd ibs=1 obs=10240 ....", but that is ruinously
Inefficient, but not too slow :)
> With most systems, you can use dd obs=, without specifying an ibs (or
> equivalently specify ibs=512, which is the default), and it will "just
Unless you need output padded to a larger blocksize :(
> Unfortunately, I know of no other tool shipped with NetBSD that is
> capable of blocking out writes like this. I have one, called
> "catblock", ...
Is there anything you haven't written? :)
Also pointed out to me; the 4.4 manuals refer to a "osync" option to dd,
which has no current GNU equivalent.
I fixed my problem by writing to a temp file, so that the read() would
grab however much I asked for, although There's More Than One Way To
Do It (sm). Thanks for all the help, folks; I got no answers from
my post to UselessNet.