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 CommandLine::SwitchMap& switches =
  90       CommandLine::ForCurrentProcess()->GetSwitches();
  91   CommandLine::StringVector args = CommandLine::ForCurrentProcess()->GetArgs();
  92
  93   // Create the child process command line by copying switches from the current
  94   // command line.
  95   CommandLine command_line(CommandLine::NO_PROGRAM);
  96   for (CommandLine::SwitchMap::const_iterator i = switches.begin();
  97        i != switches.end(); ++i) {
  98     if (i->first != kElevateSwitchName)
  99       command_line.AppendSwitchNative(i->first, i->second);
 100   }
 101   for (CommandLine::StringVector::const_iterator i = args.begin();
 102        i != args.end(); ++i) {
 103     command_line.AppendArgNative(*i);
 104   }
 105
 106   // Get the name of the binary to launch.
 107   base::FilePath binary =
 108       CommandLine::ForCurrentProcess()->GetSwitchValuePath(kElevateSwitchName);
 109   CommandLine::StringType parameters = command_line.GetCommandLineString();
 110
 111   // Launch the child process requesting elevation.
 112   SHELLEXECUTEINFO info;
 113   memset(&info, 0, sizeof(info));
 114   info.cbSize = sizeof(info);
 115   info.lpVerb = L"runas";
 116   info.lpFile = binary.value().c_str();
 117   info.lpParameters = parameters.c_str();
 118   info.nShow = SW_SHOWNORMAL;
 119
 120   if (!ShellExecuteEx(&info)) {
 121     DWORD exit_code = GetLastError();
 122     LOG_GETLASTERROR(ERROR) << "Unable to launch '" << binary.value() << "'";
 123     return exit_code;
 124   }
 125
 126   return kSuccessExitCode;
 127 }
 128
 129 #endif  // !defined(OS_WIN)
 130
 131 // Select the entry point corresponding to the process type.
 132 MainRoutineFn SelectMainRoutine(const std::string& process_type) {
 133   MainRoutineFn main_routine = NULL;
 134
 135   if (process_type == kProcessTypeHost) {
 136     main_routine = &HostProcessMain;
 137 #if defined(OS_WIN)
 138   } else if (process_type == kProcessTypeDaemon) {
 139     main_routine = &DaemonProcessMain;
 140   } else if (process_type == kProcessTypeDesktop) {
 141     main_routine = &DesktopProcessMain;
 142   } else if (process_type == kProcessTypeController) {
 143     main_routine = &ElevatedControllerMain;
 144   } else if (process_type == kProcessTypeRdpDesktopSession) {
 145     main_routine = &RdpDesktopSessionMain;
 146 #endif  // defined(OS_WIN)
 147   }
 148
 149   return main_routine;
 150 }
 151
 152 }  // namespace
 153
 154 int HostMain(int argc, char** argv) {
 155 #if defined(OS_MACOSX)
 156   // Needed so we don't leak objects when threads are created.
 157   base::mac::ScopedNSAutoreleasePool pool;
 158 #endif
 159
 160   CommandLine::Init(argc, argv);
 161
 162   // Initialize Breakpad as early as possible. On Mac the command-line needs to
 163   // be initialized first, so that the preference for crash-reporting can be
 164   // looked up in the config file.
 165 #if defined(REMOTING_ENABLE_BREAKPAD)
 166   if (IsUsageStatsAllowed()) {
 167     InitializeCrashReporting();
 168   }
 169 #endif  // defined(REMOTING_ENABLE_BREAKPAD)
 170
 171   // This object instance is required by Chrome code (for example,
 172   // LazyInstance, MessageLoop).
 173   base::AtExitManager exit_manager;
 174
 175   // Enable debug logs.
 176   InitHostLogging();
 177
 178   // Register and initialize common controls.
 179 #if defined(OS_WIN)
 180   INITCOMMONCONTROLSEX info;
 181   info.dwSize = sizeof(info);
 182   info.dwICC = ICC_STANDARD_CLASSES;
 183   InitCommonControlsEx(&info);
 184 #endif  // defined(OS_WIN)
 185
 186   // Parse the command line.
 187   const CommandLine* command_line = CommandLine::ForCurrentProcess();
 188   if (command_line->HasSwitch(kHelpSwitchName) ||
 189       command_line->HasSwitch(kQuestionSwitchName)) {
 190     Usage(command_line->GetProgram());
 191     return kSuccessExitCode;
 192   }
 193
 194   if (command_line->HasSwitch(kVersionSwitchName)) {
 195     printf("%s\n", STRINGIZE(VERSION));
 196     return kSuccessExitCode;
 197   }
 198
 199 #if defined(OS_WIN)
 200   if (command_line->HasSwitch(kElevateSwitchName)) {
 201     return RunElevated();
 202   }
 203 #endif  // defined(OS_WIN)
 204
 205   // Assume the host process by default.
 206   std::string process_type = kProcessTypeHost;
 207   if (command_line->HasSwitch(kProcessTypeSwitchName)) {
 208     process_type = command_line->GetSwitchValueASCII(kProcessTypeSwitchName);
 209   }
 210
 211   MainRoutineFn main_routine = SelectMainRoutine(process_type);
 212   if (!main_routine) {
 213     fprintf(stderr, "Unknown process type '%s' specified.",
 214             process_type.c_str());
 215     Usage(command_line->GetProgram());
 216     return kUsageExitCode;
 217   }
 218
 219   // Required to find the ICU data file, used by some file_util routines.
 220   base::i18n::InitializeICU();
 221
 222   remoting::LoadResources("");
 223
 224   // Invoke the entry point.
 225   int exit_code = main_routine();
 226   if (exit_code == kUsageExitCode) {
 227     Usage(command_line->GetProgram());
 228   }
 229
 230   remoting::UnloadResources();
 231
 232   return exit_code;
 233 }
 234
 235 }  // namespace remoting