Re: [Help-bash] How to tell if an environment variable exists or not

[Chet Ramey]

On 3/7/12 9:35 AM, Stefano Lattarini wrote:

>> Both those flags also behave unexpectedly and non-portably in a
>> number of situations, like in subshells, nesting of compound
>> commands, functions...
>>
> True for "set -e"; I don't see how this can be a problem with "set -u".

Keep in mind that Posix has changed the definition of how -u applies
at least once (with respect to expanding $@ and $* when there are no
positional parameters).  Maybe that's what he meant, though I agree
that set -e applies more in the scenarios he mentioned above.

Chet
-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
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Chet Ramey, ITS, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/