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Phil Gardner's Wrapper.sys & MS-DOS7 bug (Miscellaneous)

posted by geoffchappell(R), 14.12.2009, 08:29

> No, the kernel function only fills the DPB with data. For this, the DPB
> must be allocated. DEVLOAD needs to know the DPB's size to allocate it.
> (Sorry, me stating it needs to "create" DPBs was too vague.)

Can't it just start with the larger amount while trying the new function and reduce if it has to fall back to the old function?

> My previous example Int21.71A0 is called "LFN Get volume information"
> and one of the returned flags is "Supports DOS long filename functions".
> I'd count that as explicit, though you're right: many other interfaces
> don't have explicit checks.

Sure, that one is very explicit - as explicit as it's exceptional. Someone with control of the DOS interface may just have been feeling kind that day or been asked for it by the "right" people.

 

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