HPUX hpib_ppoll_[3i]

 hpib_ppoll_resp_ctl(3I)  Series 300, 400, 800 Only  hpib_ppoll_resp_ctl(3I)





 NAME
      hpib_ppoll_resp_ctl() - define interface parallel poll response

 SYNOPSIS
      #include <dvio.h>

      int hpib_ppoll_resp_ctl(int eid, int response);

 DESCRIPTION
      hpib_ppoll_resp_ctl() defines a response to be sent when an active
      controller performs a parallel poll on an HP-IB interface.  eid is an
      entity identifier of an open HP-IB raw bus device file, obtained from
      an open(), dup(), fcntl(), or creat() call.

      The value of response indicates whether this computer does or does not
      need service.  A non-zero response value indicates that service is
      required.  This statement only sets up a potential response; no actual
      response is generated when the statement is executed.  The sense of
      the response and the line number to respond on are set by
      hpib_card_ppoll_resp() (see hpib_card_ppoll_resp(3I)) or by the active
      controller.

 RETURN VALUE
      hpib_ppoll_resp_ctl() returns 0 if the response is successfully set,
      or -1 if an error has occured.

 ERRORS
      hpib_ppoll_resp_ctl() fails under the following situations, and sets
      errno (see errno(2)) to the value in square brackets:

           [EBADF]        eid does not refer to an open file.

           [ENOTTY]       eid does not refer to a raw HP-IB device file.

           [EACCES]       The interface associated with this eid is locked
                          by another process and O_NDELAY is set for this
                          eid (see io_lock(3I)).

 AUTHOR
      hpib_ppoll_resp_ctl() was developed by HP.

 SEE ALSO
      hpib_ppoll(3I), hpib_card_ppoll_resp(3I)











 Hewlett-Packard Company            - 1 -     HP-UX Release 9.0: August 1992