Re: currently doable? Indirect notation used w/a hash

[Chris F.A. Johnson]

On Mon, 10 Jun 2013, Greg Wooledge wrote:

> > On 10 Jun 2013 14:15, "Chris F.A. Johnson" <chris@cfajohnson.com> wrote:
> > >    It is not the least bit difficult with eval:
> > >
> > > eval "array=( \"\${$1[@]}\" )"
>
> On Mon, Jun 10, 2013 at 09:17:23PM +0800, Chris Down wrote:
> > Enjoy your arbitrary command execution.
>
> To be fair, Chris Johnson was probably assuming a programming environment
> where the function is only callable from within the same script, and
> thus has only trustworthy arguments provided by the caller.  Sometimes,
> this is the case.  Sometimes, it isn't.

   The example I gave is always safe; it expands, given 'q' as the argument, to:

array=( "${q[@]}" )

   What's unsafe about that? Why would it need any preprocessing?

--
   Chris F.A. Johnson, <http://cfajohnson.com/>
   Author:
   Pro Bash Programming: Scripting the GNU/Linux Shell (2009, Apress)
   Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)