netdev - [iproute PATCH 09/10] rtmon: List options in help text

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Message-Id: <20180816102802.31782-10-phil@nwl.cc>
Date:   Thu, 16 Aug 2018 12:28:01 +0200
From:   Phil Sutter <phil@....cc>
To:     Stephen Hemminger <stephen@...workplumber.org>
Cc:     netdev@...r.kernel.org
Subject: [iproute PATCH 09/10] rtmon: List options in help text

Signed-off-by: Phil Sutter <phil@....cc>
---
 ip/rtmon.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ip/rtmon.c b/ip/rtmon.c
index acc11df49b423..0e795f740e627 100644
--- a/ip/rtmon.c
+++ b/ip/rtmon.c
@@ -63,7 +63,9 @@ static int dump_msg2(const struct sockaddr_nl *who,
 
 static void usage(void)
 {
-	fprintf(stderr, "Usage: rtmon file FILE [ all | LISTofOBJECTS]\n");
+	fprintf(stderr, "Usage: rtmon [ OPTIONS ] file FILE [ all | LISTofOBJECTS ]\n");
+	fprintf(stderr, "OPTIONS := { -f[amily] { inet | inet6 | link | help } |\n"
+			"             -4 | -6 | -0 | -V[ersion] }\n");
 	fprintf(stderr, "LISTofOBJECTS := [ link ] [ address ] [ route ]\n");
 	exit(-1);
 }
-- 
2.18.0