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bug#14897: dd skip exit code

From: Pádraig Brady
Subject: bug#14897: dd skip exit code
Date: Thu, 18 Jul 2013 16:02:13 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2

On 07/18/2013 03:40 PM, Paul Eggert wrote:
> On 07/18/2013 02:03 AM, ffx wrote:
>> Is it the expected behaviour to have a success exit code when skip fails, 
>> even with the notice message "cannot skip..."?
> That's the change that was put in a few years ago, yes:
> http://git.sv.gnu.org/cgit/coreutils.git/commit/?id=460ebb078

Right that commit added the new warning in this case

> As the changelog says, POSIX doesn't say what to do in this situation.

Right the code portion from the above commit explaining this is:

/* POSIX doesn't say what to do when dd detects it has been
   asked to skip past EOF, so I assume it's non-fatal.
   There are 3 reasons why there might be unskipped blocks/bytes:
     1. file is too small
     2. pipe has not enough data
     3. short reads   */

Hmm I wonder since this is informational, should it be suppressed with 
status=none was added recently and I'm leaning towards it
also supressing informational warnings like this?

> Traditional 'dd' (e.g., Solaris 11.1) exits with status 3 (!).



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