provided code

src/tests/userprog/rox-child.inc

@@ -0,0 +1,33 @@
+/* -*- c -*- */
+
+#include <syscall.h>
+#include "tests/lib.h"
+#include "tests/main.h"
+
+void
+test_main (void) 
+{
+  const char *child_cmd = "child-rox " CHILD_CNT;
+  int handle;
+  pid_t child;
+  char buffer[16];
+
+  /* Open child-rox, read from it, write back same data. */
+  CHECK ((handle = open ("child-rox")) > 1, "open \"child-rox\"");
+  CHECK (read (handle, buffer, sizeof buffer) == (int) sizeof buffer,
+         "read \"child-rox\"");
+  seek (handle, 0);
+  CHECK (write (handle, buffer, sizeof buffer) == (int) sizeof buffer,
+         "write \"child-rox\"");
+
+  /* Execute child-rox and wait for it. */
+  CHECK ((child = exec (child_cmd)) != -1, "exec \"%s\"", child_cmd);
+  quiet = true;
+  CHECK (wait (child) == 12, "wait for child");
+  quiet = false;
+
+  /* Write to child-rox again. */
+  seek (handle, 0);
+  CHECK (write (handle, buffer, sizeof buffer) == (int) sizeof buffer,
+         "write \"child-rox\"");
+}