[open-cobol-list] File IO error handling

[Roger While]

Hi Keisuke,
We discussed (1) some months ago.

1)
In the case of a serious error on the OPEN statement,
we need to terminate the program. (Otherwise the
program may loop)

Currently I have these corrections to achieve this :
Prime IO exceptions ->
In typeck.c after line 2552
    CB_EXCEPTION_ENABLE (COB_EC_I_O) = 1;
Bomb out after error ->
In codegen.c replace line 2159 ("break;") with
    exit(1);

Maybe we should exit with file status or errno.
Note the above does not affect any USE statements
in DECLARATIVES which will still work as intended.

2)
The problem with OPEN OPTIONAL EXTEND reported on the list
needs something like this :
In fileio.c after line 1069
   if ( mode == COB_OPEN_EXTEND )
      RETURN_STATUS (COB_STATUS_30_PERMANENT_ERROR);

Problem is that ENOENT can also mean error in path name

3)
In numeric.c we seem to be missing some checks on
!flag_binary_truncate
(IIRC, you have my mods)

Roger While