On Mon, 25 Jul 2011 14:28:52 -0700, Linda Walsh <b...@tlinx.org> wrote:
> 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 ""
>
> So, they aren't really available in a subshell, only
> that a subshell's contents are evaluated before the subshell is
> called.
There is a distinction to make between exported and non-exported variables.
Also,
foo=bar command
is quite different from
foo=bar; command
(although sometimes, under certain conditions, they may appear to yield the
same result).
--
D.
