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diff --git a/apps/interpreters/prun/prun.c b/apps/interpreters/prun/prun.c
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+++ b/apps/interpreters/prun/prun.c
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+/****************************************************************************
+ * apps/system/prun/prun.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <apps/interpreters/prun.h>
+
+#include "pexec.h"
+#include "pedefs.h"
+#include "prun.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: prun
+ *
+ * Description:
+ *   Execute/interpret a P-Code file.  This function does not return until
+ *   the P-code program terminates or until a fatal error occurs.
+ *
+ * Input Parameters:
+ *   exepath - The full path to the P-Code binary.
+ *   varsize - Size of the P-Code variable stack
+ *   strsize - the size of the P-Code string stack.
+ *
+ * Returned Value:
+ *   OK if the P-Code program successfully terminated; A negated errno value
+ *   is returned on the event of any failure.
+ *
+ ****************************************************************************/
+
+int prun(FAR char *exepath, size_t varsize, size_t strsize)
+{
+  FAR struct pexec_s *st;
+  int errcode;
+  int ret = OK;
+
+  /* Load the POFF file into memory */
+
+  st = pload(exepath, varsize, varsize);
+  if (!st)
+    {
+      bdbg("ERROR: Could not load %s\n", exepath);
+      return -ENOEXEC;
+    }
+
+  bvdbg("Loaded %s\n", exepath);
+
+  /* Execute the P-Code program until a stopping condition occurs */
+
+  for (;;)
+    {
+      /* Execute the instruction; Check for exceptional conditions */
+
+      errcode = pexec(st);
+      if (errcode != eNOERROR)
+        {
+          break;
+        }
+    }
+
+  if (errcode != eEXIT)
+    {
+      /* REVISIT: Select a more appropriated return errocode */
+
+      bdbg("ERROR: Runtime error 0x%02x -- Execution Stopped\n", errcode);
+      ret = -ENOEXEC;
+    }
+
+  /* Clean up resources used by the interpreter */
+
+  bvdbg("Execution terminated\n");
+  pexec_release(st);
+  return ret;
+}