chrome/app_shim/win/app_shim_main.cc

   1 // Copyright 2014 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 <windows.h>
   6
   7 #include <string>
   8
   9 #include "base/command_line.h"
  10 #include "base/files/file_path.h"
  11 #include "base/logging.h"
  12 #include "base/process/launch.h"
  13 #include "chrome/installer/launcher_support/chrome_launcher_support.h"
  14
  15 namespace {
  16
  17 // Return codes.
  18 const int kOK = 0;
  19 const int kNoProgram = 1;
  20 const int kLaunchFailure = 2;
  21
  22 // Command-line switches.
  23 const char kChromeSxS[] = "chrome-sxs";
  24
  25 }  // namespace
  26
  27 // This program runs chrome.exe, passing its arguments on to the Chrome binary.
  28 // It uses the Windows registry to find chrome.exe (and hence it only works if
  29 // Chrome/Chromium has been properly installed). It terminates as soon as the
  30 // program is launched. It is intended to allow file types to be associated with
  31 // Chrome apps, with a custom name (and in some cases, icon) rather than simply
  32 // the name of the Chrome binary.
  33 //
  34 // Usage: app_shim_win [--chrome-sxs] -- [CHROME_ARGS...]
  35 //
  36 // The -- is required if switches are to be passed to Chrome; any switches
  37 // before the -- will be interpreted by app_shim_win, and not passed to Chrome.
  38 //
  39 // If --chrome-sxs is specified, looks for the SxS (Canary) build of Chrome.
  40 // This will always fail for Chromium.
  41 int WINAPI wWinMain(HINSTANCE instance,
  42                     HINSTANCE prev_instance,
  43                     wchar_t* /*command_line*/,
  44                     int show_command) {
  45   base::CommandLine::Init(0, nullptr);
  46
  47   // Log to stderr. Otherwise it will log to a file by default.
  48   logging::LoggingSettings logging_settings;
  49   logging_settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
  50   logging::InitLogging(logging_settings);
  51
  52   // Get the command-line for the Chrome binary.
  53   // --chrome-sxs on the command line means we should run the SxS binary.
  54   bool is_sxs = base::CommandLine::ForCurrentProcess()->HasSwitch(kChromeSxS);
  55   base::FilePath chrome_path =
  56       chrome_launcher_support::GetAnyChromePath(is_sxs);
  57   if (chrome_path.empty()) {
  58     LOG(ERROR) << "Could not find chrome.exe path in the registry.";
  59     return kNoProgram;
  60   }
  61   base::CommandLine command_line(chrome_path);
  62
  63   // Get the command-line arguments for the subprocess, consisting of the
  64   // arguments (but not switches) to this binary. This gets everything after the
  65   // "--".
  66   for (const auto& arg : base::CommandLine::ForCurrentProcess()->GetArgs())
  67     command_line.AppendArgNative(arg);
  68
  69   if (!base::LaunchProcess(command_line, base::LaunchOptions()).IsValid()) {
  70     LOG(ERROR) << "Could not run chrome.exe.";
  71     return kLaunchFailure;
  72   }
  73
  74   return kOK;
  75 }