0                  Indicates success.
    -1                 Indicates failure. The function sets errno to
                       one of the following values:

                       The fchown function will fail if:

                       o  EBADF - The fildes argument is not an open
                          file descriptor.

                       o  EPERM - The effective user ID does not
                          match the owner of the file, or the process
                          does not have appropriate privilege.

                       o  EROFS - The file referred to by fildes
                          resides on a read-only file system.

                       The fchown function may fail if:

                       o  EINVAL - The owner or group ID is not a
                          value supported by the implementation.

                       o  EIO - A physical I/O error has occurred.

                       o  EINTR - The fchown function was interrupted
                          by a signal that was intercepted.