Provides some of the missing POSIX file syscalls

src/trusted/desc/nacl_desc_io.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.  I/O Descriptor / Handle abstraction.  Memory
  * mapping using descriptors.
  */
@@ skipping 293 matching lines @@
   int                   rv;
   nacl_host_stat_t      hstatbuf;
 
   rv = NaClHostDescFstat(self->hd, &hstatbuf);
   if (0 != rv) {
     return rv;
   }
   return NaClAbiStatHostDescStatXlateCtor(statbuf, &hstatbuf);
 }
 
+static int NaClDescIoDescFchmod(struct NaClDesc *vself,
+                                int             mode) {
+  struct NaClDescIoDesc *self = (struct NaClDescIoDesc *) vself;
+
+  return NaClHostDescFchmod(self->hd, mode);
+}
+
+static int NaClDescIoDescFsync(struct NaClDesc *vself) {
+  struct NaClDescIoDesc *self = (struct NaClDescIoDesc *) vself;
+
+  return NaClHostDescFsync(self->hd);
+}
+
+static int NaClDescIoDescFdatasync(struct NaClDesc *vself) {
+  struct NaClDescIoDesc *self = (struct NaClDescIoDesc *) vself;
+
+  return NaClHostDescFdatasync(self->hd);
+}
+
+static int NaClDescIoDescFtruncate(struct NaClDesc  *vself,
+                                   nacl_abi_off_t   length) {
+  struct NaClDescIoDesc *self = (struct NaClDescIoDesc *) vself;
+
+  return NaClHostDescFtruncate(self->hd, length);
+}
+
 static int NaClDescIoDescExternalizeSize(struct NaClDesc *vself,
                                          size_t          *nbytes,
                                          size_t          *nhandles) {
   struct NaClDescIoDesc *self = (struct NaClDescIoDesc *) vself;
   int rv;
 
   rv = NaClDescExternalizeSize(vself, nbytes, nhandles);
   if (0 != rv) {
     return rv;
   }
@@ skipping 37 matching lines @@
 #else
   NACL_DESC_UNMAP_NOT_IMPLEMENTED
 #endif
   NaClDescIoDescRead,
   NaClDescIoDescWrite,
   NaClDescIoDescSeek,
   NaClDescIoDescPRead,
   NaClDescIoDescPWrite,
   NaClDescIoDescIoctl,
   NaClDescIoDescFstat,
+  NaClDescFchdirNotImplemented,
+  NaClDescIoDescFchmod,
+  NaClDescIoDescFsync,
+  NaClDescIoDescFdatasync,
+  NaClDescIoDescFtruncate,
   NaClDescGetdentsNotImplemented,
   NaClDescIoDescExternalizeSize,
   NaClDescIoDescExternalize,
   NaClDescLockNotImplemented,
   NaClDescTryLockNotImplemented,
   NaClDescUnlockNotImplemented,
   NaClDescWaitNotImplemented,
   NaClDescTimedWaitAbsNotImplemented,
   NaClDescSignalNotImplemented,
   NaClDescBroadcastNotImplemented,
@@ skipping 96 matching lines @@
  cleanup:
   if (rv < 0) {
     free(nhdp);
     free(ndidp);
     if (NACL_INVALID_HANDLE != h) {
       (void) NaClClose(h);
     }
   }
   return rv;
 }