mse/cmd/mse: Fail on missing subcommand

diff --git a/mse/cmd/mse/main.go b/mse/cmd/mse/main.go
index c4311ca379eea809e3e5a646ddb0caabaa53d8b5..2d90398a085bc7b72ac8b4f0331e49b1feeae1e6 100644 (file)
--- a/mse/cmd/mse/main.go
+++ b/mse/cmd/mse/main.go
@@ -37,7 +37,7 @@ func mainErr() error {
        }{
                CryptoMethod: mse.AllSupportedCrypto,
        }
-       arg.MustParse(&args)
+       p := arg.MustParse(&args)
        if args.Dial != nil {
                cn, err := net.Dial(args.Dial.Network, args.Dial.Address)
                if err != nil {
@@ -72,6 +72,9 @@ func mainErr() error {
                }
                doStreaming(rw)
        }
+       if p.Subcommand() == nil {
+               p.Fail("missing subcommand")
+       }
        return nil
 }