From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-workers-return-28596-mason-zsh=primenet.com.au@zsh.org>
Received: (qmail 7072 invoked by alias); 8 Jan 2011 02:33:10 -0000
Mailing-List: contact zsh-workers-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Workers List <zsh-workers.zsh.org>
List-Post: <mailto:zsh-workers@zsh.org>
List-Help: <mailto:zsh-workers-help@zsh.org>
X-Seq: 28596
Received: (qmail 1049 invoked from network); 8 Jan 2011 02:33:09 -0000
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on f.primenet.com.au
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE
	autolearn=ham version=3.3.1
Received-SPF: none (ns1.primenet.com.au: domain at closedmail.com does not designate permitted sender hosts)
From: Bart Schaefer <schaefer@brasslantern.com>
Message-id: <110107183257.ZM674@torch.brasslantern.com>
Date: Fri, 07 Jan 2011 18:32:57 -0800
In-reply-to: <110107181708.ZM628@torch.brasslantern.com>
Comments: In reply to Bart Schaefer <schaefer@brasslantern.com>
 "Re: exec -a and parameter expansion" (Jan  7,  6:17pm)
References: <8739p4wekt.fsf@gmail.com>
	<20110107225616.GA99800@redoubt.spodhuis.org>
	<110107181708.ZM628@torch.brasslantern.com>
X-Mailer: OpenZMail Classic (0.9.2 24April2005)
To: zsh-workers@zsh.org
Subject: Re: exec -a and parameter expansion
MIME-version: 1.0
Content-type: text/plain; charset=us-ascii

On Jan 7,  6:17pm, Bart Schaefer wrote:
} Subject: Re: exec -a and parameter expansion
}
} So either there are some missing test cases for other things that
} this would cause to break, or we should rearrange execcmd() so that
} "typeset" is the only special-cased builtin ahead of prefork().

The question, I guess, is whether/how this is supposed to work:

dash_p="-p"
command $dash_p echo "what path did I search?"

dash_a="-a"
exec $dash_a $OSTYPE echo "what did I exec?"

Currently options of special builtins must only appear literally, and
both of the above would report "command not found" (unless by some odd
chance you do have commands named "-p" and "-a").

If we follow bash's example, we should indeed be performing prefork()
a lot earlier in the handling of those special builtins, but I'm not
sure about the ones that are supposed to be true parser keywords.