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

native_client_sdk/src/libraries/nacl_io/kernel_intercept.h

 /* 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. */
 
 #ifndef LIBRARIES_NACL_IO_KERNEL_INTERCEPT_H_
 #define LIBRARIES_NACL_IO_KERNEL_INTERCEPT_H_
 
 #include <stdarg.h>
 #include <sys/time.h>
 
@@ skipping 67 matching lines @@
 int ki_fchmod(int fd, mode_t mode);
 int ki_stat(const char* path, struct stat* buf);
 int ki_mkdir(const char* path, mode_t mode);
 int ki_rmdir(const char* path);
 int ki_mount(const char* source,
              const char* target,
              const char* filesystemtype,
              unsigned long mountflags,
              const void* data);
 int ki_umount(const char* path);
-int ki_open(const char* path, int oflag);
+int ki_open(const char* path, int oflag, mode_t mode);
 int ki_pipe(int pipefds[2]);
 ssize_t ki_read(int fd, void* buf, size_t nbyte);
 ssize_t ki_write(int fd, const void* buf, size_t nbyte);
 int ki_fstat(int fd, struct stat* buf);
 int ki_getdents(int fd, void* buf, unsigned int count);
 int ki_fsync(int fd);
 int ki_fdatasync(int fd);
 int ki_ftruncate(int fd, off_t length);
 int ki_isatty(int fd);
 int ki_close(int fd);
@@ skipping 88 matching lines @@
                   const void* optval,
                   socklen_t len);
 int ki_shutdown(int fd, int how);
 int ki_socket(int domain, int type, int protocol);
 int ki_socketpair(int domain, int type, int protocl, int* sv);
 #endif  /* PROVIDES_SOCKET_API */
 
 EXTERN_C_END
 
 #endif  /* LIBRARIES_NACL_IO_KERNEL_INTERCEPT_H_ */