Provides some of the missing POSIX file syscalls

src/trusted/desc/nacl_desc_dir.c

 /*
  * 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 Service Runtime.  Directory descriptor abstraction.
  */
 
@@ skipping 127 matching lines @@
   memset(statbuf, 0, sizeof *statbuf);
   /*
    * TODO(bsy): saying it's executable/searchable might be a lie.
    */
   statbuf->nacl_abi_st_mode = (NACL_ABI_S_IFDIR |
                                NACL_ABI_S_IRUSR |
                                NACL_ABI_S_IXUSR);
   return 0;
 }
 
+static int NaClDescDirDescFchdir(struct NaClDesc *vself) {
+  struct NaClDescDirDesc *self = (struct NaClDescDirDesc *) vself;
+
+  return NaClHostDirFchdir(self->hd);
+}
+
+static int NaClDescDirDescFchmod(struct NaClDesc  *vself,
+                                 int              mode) {
+  struct NaClDescDirDesc *self = (struct NaClDescDirDesc *) vself;
+
+  return NaClHostDirFchmod(self->hd, mode);
+}
+
+static int NaClDescDirDescFsync(struct NaClDesc *vself) {
+  struct NaClDescDirDesc *self = (struct NaClDescDirDesc *) vself;
+
+  return NaClHostDirFsync(self->hd);
+}
+
+static int NaClDescDirDescFdatasync(struct NaClDesc *vself) {
+  struct NaClDescDirDesc *self = (struct NaClDescDirDesc *) vself;
+
+  return NaClHostDirFdatasync(self->hd);
+}
+
 static struct NaClDescVtbl const kNaClDescDirDescVtbl = {
   {
     NaClDescDirDescDtor,
   },
   NaClDescMapNotImplemented,
   NACL_DESC_UNMAP_NOT_IMPLEMENTED
   NaClDescDirDescRead,
   NaClDescWriteNotImplemented,
   NaClDescSeekNotImplemented,
   NaClDescPReadNotImplemented,
   NaClDescPWriteNotImplemented,
   NaClDescIoctlNotImplemented,
   NaClDescDirDescFstat,
+  NaClDescDirDescFchdir,
+  NaClDescDirDescFchmod,
+  NaClDescDirDescFsync,
+  NaClDescDirDescFdatasync,
+  NaClDescFtruncateNotImplemented,
   NaClDescDirDescGetdents,
   NaClDescExternalizeSizeNotImplemented,
   NaClDescExternalizeNotImplemented,
   NaClDescLockNotImplemented,
   NaClDescTryLockNotImplemented,
   NaClDescUnlockNotImplemented,
   NaClDescWaitNotImplemented,
   NaClDescTimedWaitAbsNotImplemented,
   NaClDescSignalNotImplemented,
   NaClDescBroadcastNotImplemented,
   NaClDescSendMsgNotImplemented,
   NaClDescRecvMsgNotImplemented,
   NaClDescLowLevelSendMsgNotImplemented,
   NaClDescLowLevelRecvMsgNotImplemented,
   NaClDescConnectAddrNotImplemented,
   NaClDescAcceptConnNotImplemented,
   NaClDescPostNotImplemented,
   NaClDescSemWaitNotImplemented,
   NaClDescGetValueNotImplemented,
   NaClDescSetMetadata,
   NaClDescGetMetadata,
   NaClDescSetFlags,
   NaClDescGetFlags,
   NACL_DESC_DIR,
 };