Provides users with a mechanism for multiplexing input/output
    over a set of file descriptors that reference open streams.

    This function is supported on OpenVMS Integrity servers and
    Alpha only.

    Format

      #include  <poll.h>

      int poll  (struct pollfd filedes [], nfds_t nfds, int timeout);

  Additional Information (explode) :

• Argument
• Description
• Return Values