GNU bug report logs - #15680
dd: suggest iflag=fullblock ... but only if count > 1

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From: Eric Blake <eblake <at> redhat.com>
To: Bernhard Voelker <mail <at> bernhard-voelker.de>, 15680 <at> debbugs.gnu.org
Subject: bug#15680: dd: suggest iflag=fullblock ... but only if count > 1
Date: Tue, 22 Oct 2013 08:05:12 +0100

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On 10/22/2013 07:47 AM, Bernhard Voelker wrote:
> dd(1) issues a nice warning about short reads ...
> 
>   src/dd if=/dev/random of=sample bs=1000 count=2
>   src/dd: warning: partial read (128 bytes); suggest iflag=fullblock
>   0+2 records in
>   0+2 records out
>   256 bytes (256 B) copied, 0.000423371 s, 605 kB/s
> 
> ... but only if count was > 1:
> 
>   src/dd if=/dev/random of=sample bs=1000 count=1
>   0+1 records in
>   0+1 records out
>   128 bytes (128 B) copied, 0.000270231 s, 474 kB/s
> 
> Is this by intension or an off-by-one?

My understanding is that it is intentional.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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