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This allows us to track execution, although the tracking for it
requires some additional thought -- the basic assumption is that we
don't want to canonicalize names into the chroot() directory, but
since all the filename canonicalization assumes that we want this,
that will take some sneaking. It's a little useful as is, though,
so I'm running with it.
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This patch adds support for checking whether a file was opened for
reading, writing, or both, as well as tracking append flags. It is
not very well tested. This is preparation for improved host
contamination checking.
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Add chroot() and a large number of things needed to make it work.
The list of intercepted calls is large but not exhaustive.
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Peter Seebach