utils: fix wrong use of errno in example files

This patch removes the use of strerr(errno) when the returned
valued is != -1. This fixes random segfaults in my x86_64
machines. According to the documentation, errno should not be
used unless the returned value is -1.

This patch also includes some missing nfct_close() calls in
the examples.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 6 insertions, 5 deletions

diff --git a/utils/expect_events.c b/utils/expect_events.c
index 956ca42..a8b84cc 100644
--- a/utils/expect_events.c
+++ b/utils/expect_events.c
@@ -37,12 +37,13 @@ int main()
 
 	ret = nfexp_catch(h);
 
-	printf("TEST: OK (%d)(%s)\n", ret, strerror(errno));
+	printf("TEST: expectation events ");
+	if (ret == -1)
+		printf("(%d)(%s)\n", ret, strerror(errno));
+	else
+		printf("(OK)\n");
 
 	nfct_close(h);
 
-	if (ret == -1)
-		exit(EXIT_FAILURE);
-
-	exit(EXIT_SUCCESS);
+	ret == -1 ? exit(EXIT_FAILURE) : exit(EXIT_SUCCESS);
 }