Plumbing though mode parameter to open, since fusefs can make use of it.

native_client_sdk/src/tests/nacl_io_test/jspipe_test.cc

 // Copyright 2014 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 <errno.h>
 #include <fcntl.h>
 #include <string.h>
 #include <sys/ioctl.h>
 #include <sys/select.h>
 #include <sys/stat.h>
@@ skipping 416 matching lines @@
     return -3;  // error
   return 1;     // readable
 }
 
 TEST_F(JSPipeTest, JSPipeSelect) {
   struct timeval timeout;
   fd_set readfds;
   fd_set writefds;
   fd_set errorfds;
 
-  int pipe_fd = ki_open("/dev/jspipe1", O_RDONLY);
+  int pipe_fd = ki_open("/dev/jspipe1", O_RDONLY, 0);
   ASSERT_GT(pipe_fd, 0) << "jspipe1 open failed: " << errno;
 
   FD_ZERO(&readfds);
   FD_ZERO(&errorfds);
   FD_SET(pipe_fd, &readfds);
   FD_SET(pipe_fd, &errorfds);
   // 10 millisecond timeout
   timeout.tv_sec = 0;
   timeout.tv_usec = 10 * 1000;
   // Should timeout when no input is available.
@@ skipping 20 matching lines @@
   ASSERT_EQ(0, ki_ioctl_wrapper(pipe_fd, NACL_IOC_HANDLEMESSAGE, &message));
   ppapi_.GetVarInterface()->Release(message);
 
   // Pipe should now be readable
   ASSERT_EQ(1, IsReadable(pipe_fd));
 
   ki_close(pipe_fd);
 }
 
 }