[mv] GlobalSubs handled differently in MV 4.x than in 3.x

[Randy Moore <ramoore@axion-it.net>]

******    message to minivend-users from Randy Moore <ramoore@axion-it.net>     ******

Hi,

I just wanted to give a warning to anyone converting existing stores from 
MV 3.x to MV 4.x about GlobalSubs.

GlobalSubs are not supposed to be subject to Safe checks, and so, can do 
unSafe things.

In MV 3.x, you could call a Globalsub from embedded Perl code and it would 
be allowed to do unSafe operations, as expected.

But, under MV 4.x, this is no longer true.  If you call your GlobalSub from 
embedded Perl code, it can NOT do unSafe operations.

I was able to get around this problem by replacing my GlobalSubs with 
globally defined (in minivend.cfg) UserTags.  Since these are not called 
from within Perl, they are still exempt from Safe checking.

If someone can explain the technical details as to why this changed (or 
correct any misconceptions I have above), I'd love to know.  It may make it 
easier to know when and if GlobalSubs can still be used for unSafe operations.

Hope this warning helps someone.
Randy Moore
Axion Information Technologies, Inc.

email     ramoore@axion-it.net
phone   301-408-1200
fax        301-445-3947
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