HPUX hpib_eoi_ct[3i]

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





 NAME
      hpib_eoi_ctl() - control EOI mode for HP-IB file

 SYNOPSIS
      #include <dvio.h>

      int hpib_eoi_ctl(int eid, int flag);

 DESCRIPTION
      hpib_eoi_ctl() enables you to turn EOI mode on or off.  eid is an
      entity identifier of an open HP-IB raw device file obtained from an
      open(), dup(), fcntl(), or creat() call.  flag is an integer which, if
      non-zero, enables EOI mode, and otherwise disables it.

      EOI mode causes the last byte of all subsequent write operations to be
      written out with the EOI line asserted, signifying the end of the data
      transmission.  By default, EOI mode is disabled when the device file
      is opened.

      Entity identifiers for the same device file obtained by separate
      open() requests have their own EOI modes associated with them.  Entity
      identifiers for the same device file obtained by dup() or inherited by
      a fork() request share the same EOI mode.  In the latter case, if one
      process enables EOI mode, then EOI mode is in effect for all such
      entity identifiers.

 RETURN VALUE
      hpib_eoi_ctl() returns a 0 (zero) if successful, or -1 if an error was
      encountered.

 ERRORS
      hpib_eoi_ctl() fails under any of the following circumstances 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 an HP-IB device file.

 DEPENDENCIES
    Series 800:
      EOI mode is enabled when the device file is first opened.

 AUTHOR
      hpib_eoi_ctl() was developed by HP.










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