components/nacl/common/nacl_paths.cc

   1 // Copyright 2013 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 "components/nacl/common/nacl_paths.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/files/file_util.h"
   9 #include "base/path_service.h"
  10 #include "components/nacl/common/nacl_switches.h"
  11
  12 namespace {
  13
  14 #if defined(OS_LINUX)
  15 // File name of the nacl_helper and nacl_helper_bootstrap, Linux only.
  16 const base::FilePath::CharType kInternalNaClHelperFileName[] =
  17     FILE_PATH_LITERAL("nacl_helper");
  18 const base::FilePath::CharType kInternalNaClHelperNonSfiFileName[] =
  19     FILE_PATH_LITERAL("nacl_helper_nonsfi");
  20 const base::FilePath::CharType kInternalNaClHelperBootstrapFileName[] =
  21     FILE_PATH_LITERAL("nacl_helper_bootstrap");
  22
  23 bool GetNaClHelperPath(const base::FilePath::CharType* filename,
  24                        base::FilePath* output) {
  25   if (!PathService::Get(base::DIR_MODULE, output))
  26     return false;
  27   *output = output->Append(filename);
  28   return true;
  29 }
  30
  31 #endif
  32
  33 }  // namespace
  34
  35 namespace nacl {
  36
  37 bool PathProvider(int key, base::FilePath* result) {
  38   switch (key) {
  39 #if defined(OS_LINUX)
  40     case FILE_NACL_HELPER:
  41       return GetNaClHelperPath(kInternalNaClHelperFileName, result);
  42     case FILE_NACL_HELPER_NONSFI:
  43       if (base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
  44               switches::kUseNaClHelperNonSfi) == "false") {
  45         // nacl_helper_nonsfi is disabled by the flag. So, use nacl_helper
  46         // in Non-SFI mode instead. This is old behavior just in case.
  47         // TODO(hidehiko): Remove this code path, when the old feature is
  48         // cleaned after nacl_helper_nonsfi is officially launched and
  49         // its stability is confirmed.
  50         return GetNaClHelperPath(kInternalNaClHelperFileName, result);
  51       }
  52       return GetNaClHelperPath(kInternalNaClHelperNonSfiFileName, result);
  53     case FILE_NACL_HELPER_BOOTSTRAP:
  54       return GetNaClHelperPath(kInternalNaClHelperBootstrapFileName, result);
  55 #endif
  56     default:
  57       return false;
  58   }
  59 }
  60
  61 // This cannot be done as a static initializer sadly since Visual Studio will
  62 // eliminate this object file if there is no direct entry point into it.
  63 void RegisterPathProvider() {
  64   PathService::RegisterProvider(PathProvider, PATH_START, PATH_END);
  65 }
  66
  67 }  // namespace nacl