Rename mount

native_client_sdk/src/libraries/nacl_mounts/kernel_handle.cc

-/* 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.
- */
-#include "nacl_mounts/kernel_handle.h"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <pthread.h>
-
-#ifndef WIN32
-// Needed for SEEK_SET/SEEK_CUR/SEEK_END.
-#include <unistd.h>
-#endif
-
-#include "nacl_mounts/mount.h"
-#include "nacl_mounts/mount_node.h"
-
-// It is only legal to construct a handle while the kernel lock is held.
-KernelHandle::KernelHandle(Mount* mnt, MountNode* node, int mode)
-    : mount_(mnt),
-      node_(node),
-      mode_(mode),
-      offs_(0) {
-  if (mode & O_APPEND) offs_ = node->GetSize();
-}
-
-off_t KernelHandle::Seek(off_t offset, int whence) {
-  size_t base;
-  size_t node_size = node_->GetSize();
-
-  switch (whence) {
-    default: return -1;
-    case SEEK_SET: base = 0; break;
-    case SEEK_CUR: base = offs_; break;
-    case SEEK_END: base = node_size; break;
-  }
-
-  if (base + offset < 0) {
-    errno = EINVAL;
-    return -1;
-  }
-
-  offs_ = base + offset;
-
-  // Seeking past the end of the file will zero out the space between the old
-  // end and the new end.
-  if (offs_ > node_size) {
-    if (node_->Truncate(offs_) < 0) {
-      errno = EINVAL;
-      return -1;
-    }
-  }
-
-  return offs_;
-}