provided code

src/tests/userprog/exec-once.c

@@ -0,0 +1,11 @@
+/* Executes and waits for a single child process. */
+
+#include <syscall.h>
+#include "tests/lib.h"
+#include "tests/main.h"
+
+void
+test_main (void) 
+{
+  wait (exec ("child-simple"));
+}