content/browser/download/base_file_posix.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/download/base_file.h"
   6
   7 #include "base/file_util.h"
   8 #include "content/public/browser/download_interrupt_reasons.h"
   9
  10 namespace content {
  11
  12 DownloadInterruptReason BaseFile::MoveFileAndAdjustPermissions(
  13     const base::FilePath& new_path) {
  14   // Similarly, on Unix, we're moving a temp file created with permissions 600
  15   // to |new_path|. Here, we try to fix up the destination file with appropriate
  16   // permissions.
  17   struct stat st;
  18   // First check the file existence and create an empty file if it doesn't
  19   // exist.
  20   if (!file_util::PathExists(new_path)) {
  21     int write_error = file_util::WriteFile(new_path, "", 0);
  22     if (write_error < 0)
  23       return LogSystemError("WriteFile", errno);
  24   }
  25   int stat_error = stat(new_path.value().c_str(), &st);
  26   bool stat_succeeded = (stat_error == 0);
  27   if (!stat_succeeded)
  28     LogSystemError("stat", errno);
  29
  30   // TODO(estade): Move() falls back to copying and deleting when a simple
  31   // rename fails. Copying sucks for large downloads. crbug.com/8737
  32   if (!file_util::Move(full_path_, new_path))
  33     return LogSystemError("Move", errno);
  34
  35   if (stat_succeeded) {
  36     // On Windows file systems (FAT, NTFS), chmod fails.  This is OK.
  37     int chmod_error = chmod(new_path.value().c_str(), st.st_mode);
  38     if (chmod_error < 0)
  39       LogSystemError("chmod", errno);
  40   }
  41   return DOWNLOAD_INTERRUPT_REASON_NONE;
  42 }
  43
  44 }  // namespace content