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...
