[BusyBox] ash variable dereference

[Steve Wahl]

On Thu, Aug 08, 2002 at 04:38:21PM +0200, Rolland Dudemaine wrote:
> Hello there,
> 
> I have two separated questions :
> 
> 1) Is there a way to do a double dereferencing of variables (like {!$a} 
> in bash) in ash :
> example :
> # i is a value iterated
> i=12
> # v will contain the name of the variable to dereference
> v=ITEM$i
> # this is working in both bash and ash, but is darn slow
> result=`sh -c 'echo -n $'"$v"`
> 
> I have not found another way to do that, and when checking a dozens 
> values, it is becoming to take some time launching as many shells as 
> dereferences...

You mean like this?

$ ITEM12=HereItIs
$ i=12
$ v=ITEM$i
$ eval result=\$$v
$ echo $result
HereItIs
$ 

--> Steve Wahl

P.S. I have no idea about the sed question.