[Python-Dev] doc for new restricted execution design for Python (original) (raw)
Nick Coghlan ncoghlan at gmail.com
Fri Jul 7 13:45:04 CEST 2006
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Greg Ewing wrote:
Another thing I perhaps should point out is that I'm proposing the separation of open() and file() for all code, not just restricted code. So it's not a matter of "crippling" file() specially for restricted code.
What would the signature of the file constructor be in that case? Would it accept a single CObject instance, with open() bypassing the normal constructor, and handing the file pointer directly to the file object instance?
It seems like a reasonable approach for making 'dangerous' objects like file and socket much easier to secure - have a separate factory function to create new instances at the C level, so that you can hand the objects over without worrying about providing access to the constructor (because the constructor accepts the OS-level object as an argument, rather than creating it anew).
Alternatively, using a "no-Python-level-introspection" metaclass might be another way to achieve the same effect in a more universal fashion.
Cheers, Nick.
-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia
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