GNUPG CLI endless loop when using --batch and --decrypt on detached signature file

[Harakiri]

--- On Tue, 4/21/09, Werner Koch <wk at gnupg.org> wrote:

> From: Werner Koch <wk at gnupg.org>
> Subject: Re: GNUPG CLI endless loop when using --batch and --decrypt on detached signature file
> To: harakiri_23 at yahoo.com
> Cc: gnupg-users at gnupg.org
> Date: Tuesday, April 21, 2009, 1:27 PM
> On Tue, 21 Apr 2009 17:25, Harakiri said:
> 
> > 2. using -decrypt without batch on detached signature
> file
> 
> 
> > i can enter what i want - gnupg will never quit -
> adding --debug-all or -v doesnt reveal anything, only
> control c will quit - but this doesnt help in a batch
> processing cronjob or similar.
> 
> You must use --batch in unattended mode unless you write
> the necessary
> code to control gpg via --command-fd.
> 

could you please be a bit more specific?

Im using --batch in unattended mode but when i use --decrypt on a detached signature file there is no way to quit the program except control + c - what am i supposed to do? status-fd does not indicate that this is a signature file (not encrypted) - so i cant do anything