src/remoting/host/host_main.cc

   1 // Copyright (c) 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 // This file implements the common entry point shared by all Chromoting Host
   6 // processes.
   7
   8 #include "remoting/host/host_main.h"
   9
  10 #include <string>
  11
  12 #include "base/at_exit.h"
  13 #include "base/command_line.h"
  14 #include "base/files/file_path.h"
  15 #include "base/i18n/icu_util.h"
  16 #include "base/logging.h"
  17 #include "base/strings/string_util.h"
  18 #include "base/strings/stringize_macros.h"
  19 #include "base/strings/stringprintf.h"
  20 #include "base/strings/utf_string_conversions.h"
  21 #include "remoting/base/breakpad.h"
  22 #include "remoting/base/resources.h"
  23 #include "remoting/host/host_exit_codes.h"
  24 #include "remoting/host/logging.h"
  25 #include "remoting/host/setup/me2me_native_messaging_host.h"
  26 #include "remoting/host/usage_stats_consent.h"
  27
  28 #if defined(OS_MACOSX)
  29 #include "base/mac/scoped_nsautorelease_pool.h"
  30 #endif  // defined(OS_MACOSX)
  31
  32 #if defined(OS_WIN)
  33 #include <commctrl.h>
  34 #include <shellapi.h>
  35 #endif  // defined(OS_WIN)
  36
  37 namespace remoting {
  38
  39 // Known entry points.
  40 int HostProcessMain();
  41 #if defined(OS_WIN)
  42 int DaemonProcessMain();
  43 int DesktopProcessMain();
  44 int ElevatedControllerMain();
  45 int RdpDesktopSessionMain();
  46 #endif  // defined(OS_WIN)
  47
  48 const char kElevateSwitchName[] = "elevate";
  49 const char kProcessTypeSwitchName[] = "type";
  50
  51 const char kProcessTypeController[] = "controller";
  52 const char kProcessTypeDaemon[] = "daemon";
  53 const char kProcessTypeDesktop[] = "desktop";
  54 const char kProcessTypeHost[] = "host";
  55 const char kProcessTypeRdpDesktopSession[] = "rdp_desktop_session";
  56
  57 namespace {
  58
  59 typedef int (*MainRoutineFn)();
  60
  61 // "--help" or "--?" prints the usage message.
  62 const char kHelpSwitchName[] = "help";
  63 const char kQuestionSwitchName[] = "?";
  64
  65 // The command line switch used to get version of the daemon.
  66 const char kVersionSwitchName[] = "version";
  67
  68 const char kUsageMessage[] =
  69   "Usage: %s [options]\n"
  70   "\n"
  71   "Options:\n"
  72   "  --audio-pipe-name=<pipe> - Sets the pipe name to capture audio on Linux.\n"
  73   "  --console                - Runs the daemon interactively.\n"
  74   "  --daemon-pipe=<pipe>     - Specifies the pipe to connect to the daemon.\n"
  75   "  --elevate=<binary>       - Runs <binary> elevated.\n"
  76   "  --host-config=<config>   - Specifies the host configuration.\n"
  77   "  --help, -?               - Print this message.\n"
  78   "  --type                   - Specifies process type.\n"
  79   "  --version                - Prints the host version and exits.\n";
  80
  81 void Usage(const base::FilePath& program_name) {
  82   printf(kUsageMessage, program_name.MaybeAsASCII().c_str());
  83 }
  84
  85 #if defined(OS_WIN)
  86
  87 // Runs the binary specified by the command line, elevated.
  88 int RunElevated() {
  89   const base::CommandLine::SwitchMap& switches =
  90       base::CommandLine::ForCurrentProcess()->GetSwitches();
  91   base::CommandLine::StringVector args =
  92       base::CommandLine::ForCurrentProcess()->GetArgs();
  93
  94   // Create the child process command line by copying switches from the current
  95   // command line.
  96   base::CommandLine command_line(base::CommandLine::NO_PROGRAM);
  97   for (base::CommandLine::SwitchMap::const_iterator i = switches.begin();
  98        i != switches.end(); ++i) {
  99     if (i->first != kElevateSwitchName)
 100       command_line.AppendSwitchNative(i->first, i->second);
 101   }
 102   for (base::CommandLine::StringVector::const_iterator i = args.begin();
 103        i != args.end(); ++i) {
 104     command_line.AppendArgNative(*i);
 105   }
 106
 107   // Get the name of the binary to launch.
 108   base::FilePath binary =
 109       base::CommandLine::ForCurrentProcess()->GetSwitchValuePath(
 110           kElevateSwitchName);
 111   base::CommandLine::StringType parameters =
 112       command_line.GetCommandLineString();
 113
 114   // Launch the child process requesting elevation.
 115   SHELLEXECUTEINFO info;
 116   memset(&info, 0, sizeof(info));
 117   info.cbSize = sizeof(info);
 118   info.lpVerb = L"runas";
 119   info.lpFile = binary.value().c_str();
 120   info.lpParameters = parameters.c_str();
 121   info.nShow = SW_SHOWNORMAL;
 122
 123   if (!ShellExecuteEx(&info)) {
 124     DWORD exit_code = GetLastError();
 125     PLOG(ERROR) << "Unable to launch '" << binary.value() << "'";
 126     return exit_code;
 127   }
 128
 129   return kSuccessExitCode;
 130 }
 131
 132 #endif  // !defined(OS_WIN)
 133
 134 // Select the entry point corresponding to the process type.
 135 MainRoutineFn SelectMainRoutine(const std::string& process_type) {
 136   MainRoutineFn main_routine = NULL;
 137
 138   if (process_type == kProcessTypeHost) {
 139     main_routine = &HostProcessMain;
 140 #if defined(OS_WIN)
 141   } else if (process_type == kProcessTypeDaemon) {
 142     main_routine = &DaemonProcessMain;
 143   } else if (process_type == kProcessTypeDesktop) {
 144     main_routine = &DesktopProcessMain;
 145   } else if (process_type == kProcessTypeController) {
 146     main_routine = &ElevatedControllerMain;
 147   } else if (process_type == kProcessTypeRdpDesktopSession) {
 148     main_routine = &RdpDesktopSessionMain;
 149 #endif  // defined(OS_WIN)
 150   }
 151
 152   return main_routine;
 153 }
 154
 155 }  // namespace
 156
 157 int HostMain(int argc, char** argv) {
 158 #if defined(OS_MACOSX)
 159   // Needed so we don't leak objects when threads are created.
 160   base::mac::ScopedNSAutoreleasePool pool;
 161 #endif
 162
 163   base::CommandLine::Init(argc, argv);
 164
 165   // Initialize Breakpad as early as possible. On Mac the command-line needs to
 166   // be initialized first, so that the preference for crash-reporting can be
 167   // looked up in the config file.
 168 #if defined(REMOTING_ENABLE_BREAKPAD)
 169   if (IsUsageStatsAllowed()) {
 170     InitializeCrashReporting();
 171   }
 172 #endif  // defined(REMOTING_ENABLE_BREAKPAD)
 173
 174   // This object instance is required by Chrome code (for example,
 175   // LazyInstance, MessageLoop).
 176   base::AtExitManager exit_manager;
 177
 178   // Enable debug logs.
 179   InitHostLogging();
 180
 181   // Register and initialize common controls.
 182 #if defined(OS_WIN)
 183   INITCOMMONCONTROLSEX info;
 184   info.dwSize = sizeof(info);
 185   info.dwICC = ICC_STANDARD_CLASSES;
 186   InitCommonControlsEx(&info);
 187 #endif  // defined(OS_WIN)
 188
 189   // Parse the command line.
 190   const base::CommandLine* command_line =
 191       base::CommandLine::ForCurrentProcess();
 192   if (command_line->HasSwitch(kHelpSwitchName) ||
 193       command_line->HasSwitch(kQuestionSwitchName)) {
 194     Usage(command_line->GetProgram());
 195     return kSuccessExitCode;
 196   }
 197
 198   if (command_line->HasSwitch(kVersionSwitchName)) {
 199     printf("%s\n", STRINGIZE(VERSION));
 200     return kSuccessExitCode;
 201   }
 202
 203 #if defined(OS_WIN)
 204   if (command_line->HasSwitch(kElevateSwitchName)) {
 205     return RunElevated();
 206   }
 207 #endif  // defined(OS_WIN)
 208
 209   // Assume the host process by default.
 210   std::string process_type = kProcessTypeHost;
 211   if (command_line->HasSwitch(kProcessTypeSwitchName)) {
 212     process_type = command_line->GetSwitchValueASCII(kProcessTypeSwitchName);
 213   }
 214
 215   MainRoutineFn main_routine = SelectMainRoutine(process_type);
 216   if (!main_routine) {
 217     fprintf(stderr, "Unknown process type '%s' specified.",
 218             process_type.c_str());
 219     Usage(command_line->GetProgram());
 220     return kUsageExitCode;
 221   }
 222
 223   // Required to find the ICU data file, used by some file_util routines.
 224   base::i18n::InitializeICU();
 225
 226   remoting::LoadResources("");
 227
 228   // Invoke the entry point.
 229   int exit_code = main_routine();
 230   if (exit_code == kUsageExitCode) {
 231     Usage(command_line->GetProgram());
 232   }
 233
 234   remoting::UnloadResources();
 235
 236   return exit_code;
 237 }
 238
 239 }  // namespace remoting