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  3. December 2009

Re: Need an RPG pgm that returns Days Until Password Expires

Bruce Vining wrote:
Agreed, but I didn't want to give the answer away by saying "in an error
situation".

This sample will actually corrupt storage in the "non-error" situation. If
an API "sees" a Bytes Provided value greater than 8 (which qualifies with
this example) then the storage address four bytes beyond the address of the
"blank" is going to be updated to x'00000000' (Bytes Available) when no
error in the API call is detected. So storage is corrupted simply by calling
the API as demonstrated in the example. Assuming the temporaries RPG sets
aside for consts are 16-byte aligned then this corruption would go
undetected (for now and assuming RPG isn't using the other 15 bytes for
"something", which I doubt).


An alpha temporary would be declared as 1-byte aligned by the RPG compiler. The RPG compiler doesn't have any control over the layout of storage, so I don't know if the 15 bytes following the temporary would be used or not.

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