commands: exit on invalid option

Barebox commands should not perform any action and return 0 if an
invalid parameter was given. This might cause undetected unintended
behvaior when calling commands with wrong options, either manually or
from a script.

Signed-off-by: Enrico Jorns <ejo@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/commands/help.c b/commands/help.c
index 3d36d9bf48..819c40653c 100644
--- a/commands/help.c
+++ b/commands/help.c
@@ -98,6 +98,8 @@ static int do_help(int argc, char *argv[])
 		case 'a':
 			all = 1;
 			break;
+		default:
+			return COMMAND_ERROR_USAGE;
 		}
 	}