From 109dad819f2b6d2c8dc28404c5f40cd936a967e2 Mon Sep 17 00:00:00 2001
From: Julian Elischer <julian@FreeBSD.org>
Date: Fri, 14 Jul 2006 23:32:43 +0000
Subject: [PATCH] Not having ipv6 in your kernel is not an error and should not
 be reported. MFC after:	1 week

---
 usr.bin/netstat/inet6.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/usr.bin/netstat/inet6.c b/usr.bin/netstat/inet6.c
index 984f525dd53..677d82d918f 100644
--- a/usr.bin/netstat/inet6.c
+++ b/usr.bin/netstat/inet6.c
@@ -67,6 +67,7 @@ __FBSDID("$FreeBSD$");
 #include <netdb.h>
 
 #include <stdio.h>
+#include <errno.h>
 #include <string.h>
 #include <unistd.h>
 #include "netstat.h"
@@ -1030,7 +1031,9 @@ rip6_stats(u_long off __unused, const char *name, int af1 __unused)
 	mib[3] = IPV6CTL_RIP6STATS;
 	l = sizeof(rip6stat);
 	if (sysctl(mib, 4, &rip6stat, &l, NULL, 0) < 0) {
-		perror("Warning: sysctl(net.inet6.ip6.rip6stats)");
+		/* Just shut up if the kernel doesn't have ipv6. */
+		if (errno != ENOENT)
+			perror("Warning: sysctl(net.inet6.ip6.rip6stats)");
 		return;
 	}