DON'T USE THIS -- Providing some missing POSIX File syscalls.

src/trusted/service_runtime/include/bits/nacl_syscalls.h

 /*
  * Copyright (c) 2012 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /*
  * NaCl kernel / service run-time system call numbers
  */
 
@@ skipping 13 matching lines @@
 #define NACL_sys_open                   10
 #define NACL_sys_close                  11
 #define NACL_sys_read                   12
 #define NACL_sys_write                  13
 #define NACL_sys_lseek                  14
 /* 15 used to be ioctl */
 #define NACL_sys_stat                   16
 #define NACL_sys_fstat                  17
 #define NACL_sys_chmod                  18
 #define NACL_sys_isatty                 19
-/* no fchmod emulation on windows */
 
 #define NACL_sys_brk                    20
 #define NACL_sys_mmap                   21
 #define NACL_sys_munmap                 22
 
 #define NACL_sys_getdents               23
 
 #define NACL_sys_mprotect               24
 
 #define NACL_sys_list_mappings          25
 
+#define NACL_sys_fsync                  26
+#define NACL_sys_fdatasync              27
+#define NACL_sys_fchmod                 28
+
 #define NACL_sys_exit                   30
 #define NACL_sys_getpid                 31
 #define NACL_sys_sched_yield            32
 #define NACL_sys_sysconf                33
 
 #define NACL_sys_gettimeofday           40
 #define NACL_sys_clock                  41
 #define NACL_sys_nanosleep              42
 #define NACL_sys_clock_getres           43
 #define NACL_sys_clock_gettime          44
 
 #define NACL_sys_mkdir                  45
 #define NACL_sys_rmdir                  46
 #define NACL_sys_chdir                  47
 #define NACL_sys_getcwd                 48
 #define NACL_sys_unlink                 49
+#define NACL_sys_fchdir                 50
+
+#define NACL_sys_ftruncate              52
 
 /* 50-58 previously used for multimedia syscalls */
 
 #define NACL_sys_imc_makeboundsock      60
 #define NACL_sys_imc_accept             61
 #define NACL_sys_imc_connect            62
 #define NACL_sys_imc_sendmsg            63
 #define NACL_sys_imc_recvmsg            64
 #define NACL_sys_imc_mem_obj_create     65
 #define NACL_sys_imc_socketpair         66
@@ skipping 51 matching lines @@
 #define NACL_sys_symlink                144
 #define NACL_sys_access                 145
 #define NACL_sys_readlink               146
 #define NACL_sys_utimes                 147
 
 #define NACL_sys_get_random_bytes       150
 
 #define NACL_MAX_SYSCALLS               151
 
 #endif