return nonzero exit code if invalid option was used

diff --git a/src/metaflac/main.c b/src/metaflac/main.c
index 3097755..4324125 100644 (file)
--- a/src/metaflac/main.c
+++ b/src/metaflac/main.c
@@ -39,6 +39,8 @@ int main(int argc, char *argv[])
 
        if(parse_options(argc, argv, &options))
                ret = !do_operations(&options);
+       else
+               ret = 1;
 
        free_options(&options);