From 2d05c0853a6d15bd7abcfa873ea1bd9d3f4ff67f Mon Sep 17 00:00:00 2001
From: Steffen Vogel <post@steffenvogel.de>
Date: Mon, 4 Sep 2017 18:03:05 +0200
Subject: [PATCH] signal: show usage info

---
 lib/nodes/signal.c | 2 +-
 src/signal.c       | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/lib/nodes/signal.c b/lib/nodes/signal.c
index 397dd0f33..43f50b98c 100644
--- a/lib/nodes/signal.c
+++ b/lib/nodes/signal.c
@@ -149,7 +149,7 @@ int signal_parse_cli(struct node *n, int argc, char *argv[])
 		continue;
 
 check:		if (optarg == endptr)
-			error("Failed to parse parse option argument '-%c %s'", c, optarg);
+			warn("Failed to parse parse option argument '-%c %s'", c, optarg);
 	}
 
 	if (argc != optind + 1)
diff --git a/src/signal.c b/src/signal.c
index 8b862261c..f65b681b3 100644
--- a/src/signal.c
+++ b/src/signal.c
@@ -145,8 +145,10 @@ int main(int argc, char *argv[])
 		error("Failed to open output");
 
 	ret = node_parse_cli(&n, argc, argv);
-	if (ret)
-		error("Failed to parse command line options");
+	if (ret) {
+		usage();
+		exit(EXIT_FAILURE);
+	}
 
 	ret = node_check(&n);
 	if (ret)