[NaCl SDK] nacl_io: Added support for access() syscall.

native_client_sdk/src/libraries/nacl_io/mount_passthrough.cc

 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "nacl_io/mount_passthrough.h"
 #include <errno.h>
 #include "nacl_io/kernel_wrap_real.h"
 
 class MountNodePassthrough : public MountNode {
  public:
@@ skipping 90 matching lines @@
 MountPassthrough::MountPassthrough() {}
 
 Error MountPassthrough::Init(int dev,
                              StringMap_t& args,
                              PepperInterface* ppapi) {
   return Mount::Init(dev, args, ppapi);
 }
 
 void MountPassthrough::Destroy() {}
 
+Error MountPassthrough::Access(const Path& path, int a_mode) {
+  // There is no underlying 'access' syscall in NaCl. It just returns ENOSYS.
+  return ENOSYS;
+}
+
 Error MountPassthrough::Open(const Path& path, int mode, MountNode** out_node) {
   *out_node = NULL;
 
   int real_fd;
   int error = _real_open(path.Join().c_str(), mode, 0666, &real_fd);
   if (error)
     return error;
 
   MountNodePassthrough* node = new MountNodePassthrough(this, real_fd);
   *out_node = node;
@@ skipping 23 matching lines @@
 }
 
 Error MountPassthrough::Rmdir(const Path& path) {
   return _real_rmdir(path.Join().c_str());
 }
 
 Error MountPassthrough::Remove(const Path& path) {
   // Not implemented by NaCl.
   return ENOSYS;
 }