EOPNOTSUPP is also called ENOTSUP in userland. ENOTSUP is the appropriate POSIX errno code for a situation such as a clock type that cannot be used in a certain call (like setting when you can only read it, etc.). Thanks, Roland -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html