Re: Passing variables by reference conflicts with local

[Chet Ramey]

On 5/1/10 6:19 PM, Freddy Vulto wrote:

> I have to give local variables a value (append an equal sign) in order
> to get them listed with 'local' in "blackbox()".  Is there a bash
> builtin which lists all defined local variable names, even those not
> having a value yet?

A variable that has not been assigned a value is not set.  After a
statement like `declare -r foo', bash keeps a placeholder so that if
foo will have the appropriate attributes if is is later assigned a value,
but such variables are not set, cannot be referenced, and should not be
listed by `set' or `declare'.

Chet

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/