NAME

hpib_ppoll_resp_ctl − Define interface parallel poll response

SYNOPSIS

int hpib_ppoll_resp_ctl (eid, response)
int eid, response;

DESCRIPTION

Eid is an entity identifier of an open HP-IB raw bus device file, obtained from an open(2), dup(2), fcntl(2), or creat(2) call. 

Hpib_ppoll_resp_ctl defines a response to be sent when an active controller performs a parallel poll on an HP-IB interface. 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 if 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(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. 

AUTHOR

Hpib_ppoll_resp_ctl was developed by the Hewlett-Packard Company. 

SEE ALSO

hpib_ppoll(3I), hpib_card_ppoll_resp(3I)

Hewlett-Packard Company  —  Version B.1,  May 11, 2021