{
{   This is the file access procedure (fap) for files that are the subject  of
{ file  connections.   Only  record  level access is supported.  The following
{ notes descirbe the processing involved for various requests.
{
{   1.  If the subject file is not  connected  to  any  target  files  or  no
{       descriptor can be found for the subject file, the request is  passed
{       to the "null device" fap.
{   2.  Output requests are passed on to all connected target files.
{   3.  Input  requests  are  passed  on  only  to the most recently connected
{       target file.
{   4.  The amc$fetch_access_information_rq is passed on to the most  recently
{       connected  target  file  if  the  last_access_operation  was  an input
{       request, otherwise it is passed on to  the  least  recently  connected
{       target file.
{   5.  The amc$fetch_req and amc$store_req requests are passed on only to the
{       least recently connected target file.  Store is also processed for the
{       subject file itself.
{   6.  The  ifp$fetch_terminal  and ifp$store_terminal requests are passed on
{       to the most recently connected target  file  that  is  assigned  to  a
{       terminal.
{
{   The first error detected during the processing of a request is reported as
{ the completion status  of  the  request.   For  requests  other  than  open,
{ processing  continues  in  order to allow the effect of the request to reach
{ all possible target files (errors other than the first are ignored).
{
{
{       BAP$CONNECTED_FILE_DEVICE (FILE_IDENTIFIER, CALL_BLOCK, LAYER_NUMBER,
{         STATUS)
{
{ FILE_IDENTIFIER: (input) This parameter specifies the file access identifier
{       established when the file was opened.
{
{ CALL_BLOCK:  (input)  This parameter specifies the call block that describes
{       the request to be performed.
{
{ LAYER_NUMBER: (input) This  parameter  specifies  the  index  into  the  fap
{       control information for this layer.
{
{ STATUS: (output) This parameter specifies the request status.
{
