From 5c1346dd169a32638aa70812aee0fc0dea3ccb70 Mon Sep 17 00:00:00 2001
From: =?utf8?q?J=C3=A9r=C3=B4me=20Benoit?= <jerome.benoit@piment-noir.org>
Date: Thu, 30 Nov 2017 21:27:30 +0100
Subject: [PATCH] print usage message if options are invalid.
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Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>
---
 lexer/main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lexer/main.c b/lexer/main.c
index a187f8e..85adea0 100644
--- a/lexer/main.c
+++ b/lexer/main.c
@@ -91,6 +91,8 @@ int main(int argc, char **argv) {
                 /* invalid option */
                 pr_error("%s: option '-%c' is invalid: ignored\n",
                          argv[0], optopt);
+                /* print the help message for invalid options */
+                hflag = 1;
                 break;
         }
     }
-- 
2.34.1