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

src/shared/platform/osx/nacl_host_dir.c

Index: src/shared/platform/osx/nacl_host_dir.c
diff --git a/src/shared/platform/osx/nacl_host_dir.c b/src/shared/platform/osx/nacl_host_dir.c
index 1852a7bf5443f5cc8fd3959b105194ede06dfebf..b8d624ddffe0f5690ef1c8eca9685cdb135eaff4 100644
--- a/src/shared/platform/osx/nacl_host_dir.c
+++ b/src/shared/platform/osx/nacl_host_dir.c
@@ -156,3 +156,31 @@ int NaClHostDirClose(struct NaClHostDir *d) {
   NaClMutexDtor(&d->mu);
   return (-1 == retval) ? -NaClXlateErrno(errno) : retval;
 }
+
+int NaClHostDirFchdir(struct NaClHostDir *d) {
+  if (-1 == fchdir(d->fd)) {
+    return -NaClXlateErrno(errno);
+  }
+  return 0;
+}
+
+int NaClHostDirFchmod(struct NaClHostDir *d, int mode) {
+  if (-1 == fchmod(d->fd, mode)) {
+    return -NaClXlateErrno(errno);
+  }
+  return 0;
+}
+
+int NaClHostDirFsync(struct NaClHostDir *d) {
+  if (-1 == fsync(d->fd)) {
+    return -NaClXlateErrno(errno);
+  }
+  return 0;
+}
+
+int NaClHostDirFdatasync(struct NaClHostDir *d) {
+  if (-1 == fdatasync(d->fd)) {
+    return -NaClXlateErrno(errno);
+  }
+  return 0;
+}