print a warning if a parameter didn't expect an argument

diff --git a/lib/args.h b/lib/args.h
index cc9a58d..733ab75 100644 (file)
--- a/lib/args.h
+++ b/lib/args.h
@@ -81,6 +81,9 @@ int args_long2shortoption(struct options_t*options, char*name, char*val)
                if(equal) {
                    //strcpy(&tmp[strlen(tmp)], equal);
                    int ret = args_callback_option(tmp, equal);
+                   if(!ret) {
+                       fprintf(stderr, "Warning: Option --%s takes no parameter.\n", name);
+                   }
                    return 0;
                }
                return args_callback_option(tmp,val);