provided code

src/tests/userprog/read-stdout.c

@@ -0,0 +1,14 @@
+/* Try reading from fd 1 (stdout), 
+   which may just fail or terminate the process with -1 exit
+   code. */
+
+#include <stdio.h>
+#include <syscall.h>
+#include "tests/main.h"
+
+void
+test_main (void) 
+{
+  char buf;
+  read (STDOUT_FILENO, &buf, 1);
+}