Verifying Signatures in a Script

[Keith Hellman]

I would like a script to verify that I've signed a document.  Verifying
a signature is easy with gnupg, but I can't find a switch that requires 
the signature be that of a particular public key.

As it is, a document signed by someone else (whose public key I have)
would slip through my script if I just use the exit code.  My best
solution so far is to detect the identity printed out by gpg on stderr
--- but this seems a fragile solution.

I'd like to be able to say:
  $ gpg --verify-specific-user khellman at mcprogramming.com 
          --verify signedoc.gpg

Does this functionality exist? Did I miss something in the docs? Is
there a workaround?

TIA
-- 
Keith Hellman                             #include <disclaimer.h>
khellman at mcprogramming.com                from disclaimer import standard
khellman at mines.edu
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                    public key @ pgp.mit.edu B5354B76                     
    Y!M: mcprogramming                           AIM/ICQ: 485403897       
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"In any project that is multi-threaded, most bugs will come from threading
issues.  This is regardless of programming language -- it's a deep, as yet
ununderstood property of threads."

-- Guido van Rossum
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