File Border Code
     open/4 option:  end_of_file(FileBorder)
     QP_stream:      int file_border

This is the code to be returned on reading at the end of file for an input stream. This field is not used for an output stream. The value in file_border field can be any integer greater than or equal to QP_NOFB (-2). If the value is QP_NOFB, there is no file border code for the stream. If the file_border field is QP_NOFB, reading at the end of file is the same as reading past the end of file.