+#if defined UT_LINESIZE \
+ && ((UT_LINESIZE != 32) || (UT_NAMESIZE != 32) || (UT_HOSTSIZE != 256))
+#error struct utmp member char[] size(s) have changed!
+#elif defined __UT_LINESIZE \
+ && ((__UT_LINESIZE != 32) || (__UT_NAMESIZE != 64) || (__UT_HOSTSIZE != 256))