Re: _Rwrite and _RIOFB_T->dup_key

Wow, found this (https://www.ibm.com/docs/en/i/7.2?topic=paths-duplicate-key-values):

"If an I⁄O operation on a record is successful and a duplicate key value is found in that record, the dup_key flag in the _RIOFB_T structure is set."

But how to understand that my I/O operation on a record is _un_successful because of duplicate keys? In RPGLE, we can monitor 01021 exceptions on WRITE statements. But what about C?

Regards,
Alexei

-------- Original Message --------
Subject : [C400-L] _Rwrite and _RIOFB_T->dup_key
From : Alexei Baranov alexei.baranov@xxxxxxxxxx
To : C400-L@xxxxxxxxxxxxxxxxxx
Cc :
Date : Friday, December 13, 2024 15:31

Hello everyone!

I encountered a problem - the _Rwrite does not set the dup_key in _RIOFB_T, when writing a duplicate unique value to unique keyed file.
Tried on several servers, same result everywhere. Has anyone encountered something similar?

My code is simple:

#include <recio.h>
#include <stdio.h>
#include <errno.h>

void main(void) {
char buffer[9999];
_RFILE *file1 = _Ropen("<some file keyed with UNIQUE=Yes>", "rr+,dupkey=Y");
_RFILE *file2 = _Ropen("<same file as here ^>", "rr+,dupkey=Y");
_RIOFB_T *fb;

fb = _Rreadf(file1, buffer, file1->buf_length, __NO_LOCK);
fb = _Rwrite(file2, buffer, file2->buf_length);

// Joblog says "Duplicate key on access path"
// fb->num_bytes==0
// BUT: fb->dup_key==0!
// Where I'm wrong?????

return;
}