From 72d2eacd06d9783122c75b0e6ba238d4b82340be Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Mon, 13 Aug 2012 11:41:57 +0200
Subject: utils: iftest: check return value of nlif_query

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 utils/iftest.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'utils/iftest.c')

diff --git a/utils/iftest.c b/utils/iftest.c
index 63cf163..a8117fa 100644
--- a/utils/iftest.c
+++ b/utils/iftest.c
@@ -2,6 +2,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <errno.h>
 #include <net/if.h>
 
@@ -25,7 +26,11 @@ int main(int argc, char *argv[])
 		exit(EXIT_FAILURE);
 	}
 
-	nlif_query(h);
+	if (nlif_query(h) == -1) {
+		fprintf(stderr, "failed query to retrieve interfaces: %s\n",
+			strerror(errno));
+		exit(EXIT_FAILURE);
+	}
 
 	idx = if_nametoindex(argv[1]);
 
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