[NaCl SDK] nacl_io: Fix utime() on directories.

native_client_sdk/src/libraries/nacl_io/kernel_handle.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/kernel_handle.h"
 
 #include <errno.h>
 #include <pthread.h>
 
 #include "nacl_io/filesystem.h"
@@ skipping 26 matching lines @@
   return NULL;
 }
 
 Error KernelHandle::Init(int open_flags) {
   handle_attr_.flags = open_flags;
 
   if ((open_flags & O_CREAT) == 0 && !node_->CanOpen(open_flags)) {
     return EACCES;
   }
 
+  // Directories can only be opened read-only.
+  if ((open_flags & 3) != O_RDONLY && node_->IsaDir()) {
+    return EISDIR;
+  }
+
   if (open_flags & O_APPEND) {
     Error error = node_->GetSize(&handle_attr_.offs);
     if (error)
       return error;
   }
 
   return 0;
 }
 
 Error KernelHandle::Seek(off_t offset, int whence, off_t* out_offset) {
@@ skipping 171 matching lines @@
     return ENOTSOCK;
   if (OpenMode() == O_RDONLY)
     return EACCES;
 
   AUTO_LOCK(handle_lock_);
   return sock->SendTo(handle_attr_, buf, len, flags, dest_addr, addrlen,
                       out_len);
 }
 
 }  // namespace nacl_io