netdev - [PATCH 2/2] ping6: Fix -F switch.

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Date:	Fri,  7 Dec 2012 09:25:24 +0100
From:	Jan Synacek <jsynacek@...hat.com>
To:	yoshfuji@...ux-ipv6.org
Cc:	netdev@...r.kernel.org, Jan Synacek <jsynacek@...hat.com>
Subject: [PATCH 2/2] ping6: Fix -F switch.

Even when the flowlabel is set correctly, ping6 exits with a warning. For some
reason, the errno is set when it should not be.

Signed-off-by: Jan Synacek <jsynacek@...hat.com>
---
 ping6.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ping6.c b/ping6.c
index 358a035..85d3782 100644
--- a/ping6.c
+++ b/ping6.c
@@ -725,7 +725,8 @@ int main(int argc, char *argv[])
 		switch(ch) {
 		case 'F':
 			flowlabel = hextoui(optarg);
-			if (errno || (flowlabel & ~IPV6_FLOWINFO_FLOWLABEL)) {
+			if ((flowlabel < 0 && errno) ||
+			    (flowlabel & ~IPV6_FLOWINFO_FLOWLABEL)) {
 				fprintf(stderr, "ping: Invalid flowinfo %s\n", optarg);
 				exit(2);
 			}
-- 
1.8.0.1

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