From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jonathan Nieder <jrnieder@gmail.com>
Subject: Re: Bug: temporary assignments vs shell function
Date: Thu, 14 Jul 2011 05:25:14 -0500
Message-ID: <20110714102514.GA12904@elie>
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To: Rudolf Polzer <divverent@xonotic.org>
Cc: dash@vger.kernel.org

Rudolf Polzer wrote:

> So basically - when using an assignment for the duration of a shell command
> execution, an explicit subshell must be used in portable scripts, as
> interpretation of this construct differs among shells and thus cannot be relied
> on.

If "shell command execution" means "function call", then yes.

[...]
> exported() { :; }
>
> foo=bar exported
> sh -c 'echo $foo'

Ah, yuck.  On this machine:

 - dash does not export
 - zsh with "emulate sh" exports
 - ksh93 does not export
 - pdksh does not export
 - posh does not export
 - mksh exports
 - "bash -o posix" exports
 - busybox sh does not export

Fun.