Default message handling

Since a large number of the messages received by a resource manager deal with a common set of attributes, the OS provides an iofunc_*() shared library that lets a resource manager handle functions like stat(), chmod(), chown(), lseek(), and so on automatically, without your having to write additional code. As an added benefit, these iofunc_*() default handlers implement the POSIX semantics for the messages, offloading some work from you.

The library contains iofunc_*() default handlers for these client functions: