From: Juergen Beisert <j.beisert@pengutronix.de>
Date: Thu, 18 Oct 2012 14:25:03 +0200
Subject: [PATCH] Output help if no parameters are given

Output a help, if a user omit any parameter instead of silently start the
job and do something.

Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>
---
 tiotest.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tiotest.c b/tiotest.c
index 38f54e7917a0..6407d70252bf 100644
--- a/tiotest.c
+++ b/tiotest.c
@@ -112,6 +112,9 @@ void parse_args( ArgumentOptions* args, int argc, char *argv[] )
 	int c;
 	int once = 0;
 
+	if (argc == 1)
+		print_help_and_exit();
+
 	while (1)
 	{
 		c = getopt( argc, argv, "f:b:d:t:r:D:k:o:hLRTWSOc");