Re: Use of pipe in $(< filename | program) returns null

[Bernd Eggink]

Am 28.11.2009 06:35, schrieb root@saturn.syslang.net:
> Description:
>         use of $(<  filename | program) does not work. It either should or it 
> should be properly documented.
>         The problem also happens on bash4.
>
> Repeat-By:
>
>         qq=$(<  /etc/passwd | grep sys)
>         echo $qq
>         # result is null
>
> Fix:
>         Either fix the docs to tell people that a pipe is not allowed or fix 
> the code to allow it.

The problem is not the pipe but the fact that '<filename' is an empty 
command which does nothing. If you want 'program' to read from 'file', 
use 'program<file'.

Bernd

--
Bernd Eggink
http://sudrala.de