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From: Christian Neukirchen <chneukirchen@gmail.com>
To: zsh-workers@zsh.org
Subject: exec -a and parameter expansion
Date: Fri, 07 Jan 2011 23:09:54 +0100
Message-ID: <8739p4wekt.fsf@gmail.com>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux)
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Hi,

trying to write a script that sets argv[0] for a child process, I tried
using exec -a and noticed this difference:

% zsh -c 'exec -a $OSTYPE ps ax' |grep ax
 3755 pts/19   RN+    0:00 ?OSTYPE ax

% bash -c 'exec -a $OSTYPE ps ax' |grep ax
 3876 pts/19   RN+    0:00 linux-gnu ax

I expected the latter output for zsh too.  (And I can't explain the "?".)
Is this a bug?

Thanks,
-- 
Christian Neukirchen  <chneukirchen@gmail.com>  http://chneukirchen.org