[Rd] File permissions test during R CMD check

[Kurt Hornik]

>>>>> "David Kane writes:

> I think that I understand why R CMD check should warn if the
> permissions on a file are too restrictive, but I don't understand why
> it should warn if they are "too" loose. On UNIX, why is a file with
> 644 OK, but one with 664 (just adding group writability) problematic
> enough to require a warning?

I think we want the *installed* files to be 644 and dirs to be 755 (by
default).  Can we be sure that all routes to installing a package (as
source or binary) lead to this even if permissions originally were too
loose?  I don't, hence I prefer being on the defensive side.

-k
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