Function PQconndefaults

src/interfaces/libpq/fe-connect.c:1545–1569

* PQconndefaults * * Construct a default connection options array, which identifies all the * available options and shows any default values that are available from the * environment etc. On error (eg out of memory), NULL is returned. * * Using this function, an application may determine all possible options * and their current default values. * * NOTE: as of PostgreSQL 7.0, the returne

 * until they are updated to call PQconninfoFree.
 */
PQconninfoOption *
PQconndefaults(void)
{
	PQExpBufferData errorBuf;
	PQconninfoOption *connOptions;

	/* We don't actually report any errors here, but callees want a buffer */
	initPQExpBuffer(&errorBuf);
	if (PQExpBufferDataBroken(errorBuf))
		return NULL;			/* out of memory already :-( */

	connOptions = conninfo_init(&errorBuf);
	if (connOptions != NULL)
	{
		/* pass NULL errorBuf to ignore errors */
		if (!conninfo_add_defaults(connOptions, NULL))
		{
			PQconninfoFree(connOptions);
			connOptions = NULL;
		}
	}

	termPQExpBuffer(&errorBuf);
	return connOptions;
}

/* ----------------
 *		PQsetdbLogin