From b41c471090a4bb9d5bbbe1a0b65946338f64143d Mon Sep 17 00:00:00 2001
From: ChristophTobler <christoph.tob@gmail.com>
Date: Tue, 3 Oct 2017 08:51:17 +0200
Subject: [PATCH] accelsim/gyrosim: fix seg fault if not enough arguments

happens with 'accelsim/gyrosim -R'
---
 src/platforms/posix/drivers/accelsim/accelsim.cpp | 2 +-
 src/platforms/posix/drivers/gyrosim/gyrosim.cpp   | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/platforms/posix/drivers/accelsim/accelsim.cpp b/src/platforms/posix/drivers/accelsim/accelsim.cpp
index 061715984b..a7cc7d9d72 100644
--- a/src/platforms/posix/drivers/accelsim/accelsim.cpp
+++ b/src/platforms/posix/drivers/accelsim/accelsim.cpp
@@ -1168,7 +1168,7 @@ accelsim_main(int argc, char *argv[])
 		}
 	}
 
-	if (argc <= 1) {
+	if (myoptind >= argc) {
 		accelsim::usage();
 		return 1;
 	}
diff --git a/src/platforms/posix/drivers/gyrosim/gyrosim.cpp b/src/platforms/posix/drivers/gyrosim/gyrosim.cpp
index 8e647453df..810a874225 100644
--- a/src/platforms/posix/drivers/gyrosim/gyrosim.cpp
+++ b/src/platforms/posix/drivers/gyrosim/gyrosim.cpp
@@ -1482,6 +1482,11 @@ gyrosim_main(int argc, char *argv[])
 		}
 	}
 
+	if (myoptind >= argc) {
+		gyrosim::usage();
+		return 1;
+	}
+
 	const char *verb = argv[myoptind];
 
 	/*