Hello Just looking at this page: http://man7.org/linux/man-pages/man3/gethostbyname.3.html NO_ADDRESS or NO_DATA The requested name is valid but does not have an IP address. These macros are actually the same value, is there a good way to explain that? i.e. no way to have a switch for both. perhaps just say NO_DATA, then add the following for compatibility? #define NO_ADDRESS NO_DATA Regards, Jonny -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html