UDF and stacked scanners

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Hi folks. after reading a bit UDF source code, is feasible having 2
scanners at the same time?,. Have you tested with this? Are they
stacked? for example marking clamavd as a scanner and set tripwire as
another one. With this approach You could make for example to only
allow access to a file if sha256sum is correct forbiding access if
none (tripwire returns code 8 if I remember correctly so it would be
seen as denied by UDF).

I think there could be multiple scenarios interesting to this
approach, as it could be in NAS scenarios or just as an integrity
"model" as BIBA :P or why not spamasassing ones :)

Maybe UDF could be a user space REG model :)

Have any of you hacked with this?

What do you think?
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