Using a function to compute the working backend, it could be something like :

void setWorkingBackend( syncinfo_t *syncInfo, Backend *backend ) { if ( !syncInfo->si_wbe ) { if ( SLAP_GLUE_SUBORDINATE( backend ) && !overlay_is_inst( backend, "syncprov" ) ) { // The backend has a parent backend, fetch it. Note that we want to get the // top parent, not one of the intermediary subordinate, unless one of them // has a syncprov overlay declared. If the top level backend // does not have a syncprov overlay declared, then we use the local DB // as a working backend. BackendDB *currentBackend = backend; struct berval bv; ber_str2bv( currentBackend->be_nsuffix[0].bv_val, 0, 0, &bv ); dnParent( &bv, &bv );

while ( ( currentBackend = select_backend( &bv, 0 ) ) != NULL ) { if ( overlay_is_inst( currentBackend, "syncprov" ) ) { syncInfo->si_wbe = currentBackend; break; }

dnParent( &bv, &bv ); }

if ( syncInfo->si_wbe == NULL ) { syncInfo->si_wbe = backend; } } else { syncInfo->si_wbe = backend; }

if ( SLAP_SYNC_SUBENTRY( syncInfo->si_wbe ) ) { build_new_dn( &syncInfo->si_contextdn, &syncInfo->si_wbe->be_nsuffix[0], (struct berval *) &slap_ldapsync_cn_bv, NULL ); } else { syncInfo->si_contextdn = syncInfo->si_wbe->be_nsuffix[0]; } } }

We call it with

setWorkingBackend( si, be );