Re: Why tail coreutil cannot work as its input is from tee

[felix]

Because your last pipe will pipe BOTH output of `echo` AND `head` with
delay due to fork, head output will comme after. try this:

  echo -e '9\n4\n3\n2\n8\n7\n3\n1' |tee >(head -1 >&2) |tail -1

or 

  echo -e '9\n4\n3\n2\n8\n7\n3\n1' |tee >(head -1 >&2) >(tail -1 >&2) >/dev/null

...

On Mon, Sep 06, 2021 at 07:38:03AM +0000, Budi wrote:
> How come tail coreutil cannot work as its input is from tee
> 
> $ echo -e '9\n4\n3\n2\n8\n7\n3\n1' |tail -1
> 1
> 
> But :
> 
> $ echo -e '9\n4\n3\n2\n8\n7\n3\n1' |tee >(head -1) |tail -1
> 9
> 
> Please help explain
> 

-- 
 Félix Hauri  -  <felix@f-hauri.ch>  -  http://www.f-hauri.ch