netdev - [PATCH V2 5/5 nf] selftests: netfilter: add command usage

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Message-Id: <20200823181806.13463-1-fabf@skynet.be>
Date:   Sun, 23 Aug 2020 20:18:06 +0200
From:   Fabian Frederick <fabf@...net.be>
To:     pablo@...filter.org, kadlec@...filter.org, fw@...len.de,
        sbrivio@...hat.com
Cc:     netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        netdev@...r.kernel.org, Fabian Frederick <fabf@...net.be>
Subject: [PATCH V2 5/5 nf] selftests: netfilter: add command usage

Avoid bad command arguments.
Based on tools/power/cpupower/bench/cpufreq-bench_plot.sh

Signed-off-by: Fabian Frederick <fabf@...net.be>
---
V2: new patch

 tools/testing/selftests/netfilter/nft_flowtable.sh | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/tools/testing/selftests/netfilter/nft_flowtable.sh b/tools/testing/selftests/netfilter/nft_flowtable.sh
index 44a8798262369..431296c0f91cf 100755
--- a/tools/testing/selftests/netfilter/nft_flowtable.sh
+++ b/tools/testing/selftests/netfilter/nft_flowtable.sh
@@ -86,12 +86,23 @@ omtu=9000
 lmtu=1500
 rmtu=2000
 
+usage(){
+	echo "nft_flowtable.sh [OPTIONS]"
+	echo
+	echo "MTU options"
+	echo "   -o originator"
+	echo "   -l link"
+	echo "   -r responder"
+	exit 1
+}
+
 while getopts "o:l:r:" o
 do
 	case $o in
 		o) omtu=$OPTARG;;
 		l) lmtu=$OPTARG;;
 		r) rmtu=$OPTARG;;
+		*) usage;;
 	esac
 done
 
-- 
2.27.0