Re: How to do? Possible?

[Linda Walsh]

Linda Walsh wrote:
> 
> Bob Proulx wrote:
>> Yes, but it is a fork(2) of the parent shell and all of the variables
>> from the parent are copied along with the fork into the child process
>> and that includes non-exported variables.  Normally you would expect
>> that a subprocess wouldn't have access to parent shell variables
>> unless they were exported.  But with a subshell a copy of all
>> variables are available.
>>
>> Bob
> --
>   Not really.
>   It only seems that way because within () any "$xxxx" is usually
> expanded BEFORE the () starts from the parent....
> 
> You can see this by
>   GLOBAL="hi there"
>   (echo $GLOBAL)
> prints out "hi there" as expected, but if we hide
> $GLOBAL so it isn't seen by parent:
>   (foo=GLOBAL; echo ${!foo})
> prints ""
---
I mistyped that but it brings me to an interesting
conundrum:

GLOBAL="hi there"
{foo=GLOBAL echo ${!foo}; }

> (foo=GLOBAL echo ${!foo} )

But:
> { foo=GLOBAL;echo ${!foo}; }
hi there
> (foo=GLOBAL; echo ${!foo})
hi there
 ----
Weird...