1 files changed, 26 insertions, 0 deletions

diff --git a/tools/perf/util/ui/helpline.c b/tools/perf/util/ui/helpline.c
index 6a11e1301559..ff584606a4dc 100644
--- a/tools/perf/util/ui/helpline.c
+++ b/tools/perf/util/ui/helpline.c
@@ -3,6 +3,7 @@
 #include <stdlib.h>
 #include <newt.h>
 
+#include "../debug.h"
 #include "helpline.h"
 
 void ui_helpline__pop(void)
@@ -41,3 +42,28 @@ void ui_helpline__puts(const char *msg)
         ui_helpline__pop();
         ui_helpline__push(msg);
 }
+
+void ui_helpline__init(void)
+{
+        ui_helpline__puts(" ");
+}
+
+char ui_helpline__last_msg[1024];
+
+int ui_helpline__show_help(const char *format, va_list ap)
+{
+        int ret;
+        static int backlog;
+
+        ret = vsnprintf(ui_helpline__last_msg + backlog,
+                        sizeof(ui_helpline__last_msg) - backlog, format, ap);
+        backlog += ret;
+
+        if (ui_helpline__last_msg[backlog - 1] == '\n') {
+                ui_helpline__puts(ui_helpline__last_msg);
+                newtRefresh();
+                backlog = 0;
+        }
+
+        return ret;
+}