From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <94ec8e21ec12b4dc3ae41b46df9420b8@vitanuova.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] multiple inputs
From: rog@vitanuova.com
In-Reply-To: <4623606e74a91925b510cd480e7738da@cwru.edu>
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Date: Thu,  1 Apr 2004 20:47:56 +0100
Topicbox-Message-UUID: 4d4c176a-eacd-11e9-9e20-41e7f4b1d025

> a way to make the shell less dangerous when it expands metacharacters

it's easy...  don't use eval!  (i've written loads of rc scripts and i
don't think i've ever used eval).

if you really wanted to use eval in a safe way, you'd need some
support for quoting; for instance:

% quote a 'b c' d
a 'b c' d
% 

but it'd be awkward to use this in rc due to the `{} $ifs splitting.

i made this kind of thing easier to do in the inferno shell, but i'm
still not that convinced - it's very easy to build up inpenetrable
layers.