The posix module is subdivided according to C headers; for instance, posix.unistd contains routines available from unistd.h, such as chown(2). A quirk of our implementation is that each of the modules is a direct entry in the global table. That is, there is no "posix" table. Instead, "posix.foo" and "posix.bar.baz" are both top-level tables. This is surprising and goes against Lua's shorthand of using "." to access keys in a table. lua-posix also doesn't work this way. Rework things so that "posix" and "posix.sys" are proper tables. Existing flua code which uses require() to bind posix submodules to a name will be unaffected. Code which accesses them directly using something like _G["posix.sys.utsname"].uname() will be broken, but I don't think anything like that exists. In particular, it is now possible to call posix.sys.utsname.uname() without any require statements. Reviewed by: imp, bapt MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D51158