give help if no options are given

diff --git a/ebtablesu.c b/ebtablesu.c
index cd86783..1fed0c1 100644 (file)
--- a/ebtablesu.c
+++ b/ebtablesu.c
@@ -35,7 +35,8 @@ int main(int argc, char *argv[])
                return -1;
        } else if (argc == 1) {
                fprintf(stderr, "At least one argument is needed.\n");
-               return -1;
+               print_help();
+               exit(0);
        }
 
        for (i = 0; i < argc; i++)