[clug] 'dd' command detecting EOF: an example script

[Steve Jenkin]

Dave,

Many thanks.

It seems GNU dd have added a side-effect with ‘direct’ - it has a non-zero return on EOF, which was my complaint.
Or GN did it right… 

cheers
steve

PS: On Debian Jessie, dd (coreutils) 8.23, I get this error. (‘direct’ is supported)

> dd: setting flags for ‘standard input’: Invalid argument

> On 15 May 2019, at 12:25, David Deaves <David.Deaves at dd.id.au> wrote:
> 
> Using  iflag=direct  seems to do what you want, as long as the input is a file (doesn't work
> for a pipe, not sure about networked file...).
> 
> (
>  i=0;
>  while dd count=32 bs=1k of=part_$i iflag=direct
>  do
>    let i++
>  done
> ) < ~/somefile
> 
> 
> Dave !

--
Steve Jenkin, IT Systems and Design 
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