$NetBSD: patch-ab,v 1.2 2016/03/09 06:52:02 tnn Exp $

It's 2016. Everyone has strerror.

--- utils.c.orig	1999-02-11 12:44:15.000000000 +0000
+++ utils.c
@@ -1,13 +1,8 @@
 #include <errno.h>
-#define NULL 0
+#include <string.h>
 
 
 char *
 uerror() {
-	extern int sys_nerr;
-	extern char *sys_errlist[];
-	if (errno > sys_nerr)
-	    return NULL;
-	else
-	    return sys_errlist[errno];
+	return strerror(errno);
 }