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 RdpDesktopSessionMain();
  45 #endif  // defined(OS_WIN)
  46
  47 const char kElevateSwitchName[] = "elevate";
  48 const char kProcessTypeSwitchName[] = "type";
  49
  50 const char kProcessTypeDaemon[] = "daemon";
  51 const char kProcessTypeDesktop[] = "desktop";
  52 const char kProcessTypeHost[] = "host";
  53 const char kProcessTypeRdpDesktopSession[] = "rdp_desktop_session";
  54
  55 namespace {
  56
  57 typedef int (*MainRoutineFn)();
  58
  59 // "--help" or "--?" prints the usage message.
  60 const char kHelpSwitchName[] = "help";
  61 const char kQuestionSwitchName[] = "?";
  62
  63 // The command line switch used to get version of the daemon.
  64 const char kVersionSwitchName[] = "version";
  65
  66 const char kUsageMessage[] =
  67   "Usage: %s [options]\n"
  68   "\n"
  69   "Options:\n"
  70   "  --audio-pipe-name=<pipe> - Sets the pipe name to capture audio on Linux.\n"
  71   "  --console                - Runs the daemon interactively.\n"
  72   "  --daemon-pipe=<pipe>     - Specifies the pipe to connect to the daemon.\n"
  73   "  --elevate=<binary>       - Runs <binary> elevated.\n"
  74   "  --host-config=<config>   - Specifies the host configuration.\n"
  75   "  --help, -?               - Print this message.\n"
  76   "  --type                   - Specifies process type.\n"
  77   "  --version                - Prints the host version and exits.\n"
  78   "  --window-id=<id>         - Specifies a window to remote,"
  79                                 " instead of the whole desktop.\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 = nullptr;
 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 == kProcessTypeRdpDesktopSession) {
 146     main_routine = &RdpDesktopSessionMain;
 147 #endif  // defined(OS_WIN)
 148   }
 149
 150   return main_routine;
 151 }
 152
 153 }  // namespace
 154
 155 int HostMain(int argc, char** argv) {
 156 #if defined(OS_MACOSX)
 157   // Needed so we don't leak objects when threads are created.
 158   base::mac::ScopedNSAutoreleasePool pool;
 159 #endif
 160
 161   base::CommandLine::Init(argc, argv);
 162
 163   // Initialize Breakpad as early as possible. On Mac the command-line needs to
 164   // be initialized first, so that the preference for crash-reporting can be
 165   // looked up in the config file.
 166 #if defined(REMOTING_ENABLE_BREAKPAD)
 167   if (IsUsageStatsAllowed()) {
 168     InitializeCrashReporting();
 169   }
 170 #endif  // defined(REMOTING_ENABLE_BREAKPAD)
 171
 172   // This object instance is required by Chrome code (for example,
 173   // LazyInstance, MessageLoop).
 174   base::AtExitManager exit_manager;
 175
 176   // Enable debug logs.
 177   InitHostLogging();
 178
 179   // Register and initialize common controls.
 180 #if defined(OS_WIN)
 181   INITCOMMONCONTROLSEX info;
 182   info.dwSize = sizeof(info);
 183   info.dwICC = ICC_STANDARD_CLASSES;
 184   InitCommonControlsEx(&info);
 185 #endif  // defined(OS_WIN)
 186
 187   // Parse the command line.
 188   const base::CommandLine* command_line =
 189       base::CommandLine::ForCurrentProcess();
 190   if (command_line->HasSwitch(kHelpSwitchName) ||
 191       command_line->HasSwitch(kQuestionSwitchName)) {
 192     Usage(command_line->GetProgram());
 193     return kSuccessExitCode;
 194   }
 195
 196   if (command_line->HasSwitch(kVersionSwitchName)) {
 197     printf("%s\n", STRINGIZE(VERSION));
 198     return kSuccessExitCode;
 199   }
 200
 201 #if defined(OS_WIN)
 202   if (command_line->HasSwitch(kElevateSwitchName)) {
 203     return RunElevated();
 204   }
 205 #endif  // defined(OS_WIN)
 206
 207   // Assume the host process by default.
 208   std::string process_type = kProcessTypeHost;
 209   if (command_line->HasSwitch(kProcessTypeSwitchName)) {
 210     process_type = command_line->GetSwitchValueASCII(kProcessTypeSwitchName);
 211   }
 212
 213   MainRoutineFn main_routine = SelectMainRoutine(process_type);
 214   if (!main_routine) {
 215     fprintf(stderr, "Unknown process type '%s' specified.",
 216             process_type.c_str());
 217     Usage(command_line->GetProgram());
 218     return kUsageExitCode;
 219   }
 220
 221   // Required to find the ICU data file, used by some file_util routines.
 222   base::i18n::InitializeICU();
 223
 224   remoting::LoadResources("");
 225
 226   // Invoke the entry point.
 227   int exit_code = main_routine();
 228   if (exit_code == kUsageExitCode) {
 229     Usage(command_line->GetProgram());
 230   }
 231
 232   remoting::UnloadResources();
 233
 234   return exit_code;
 235 }
 236
 237 }  // namespace remoting
 238
 239 #if !defined(OS_WIN)
 240 int main(int argc, char** argv) {
 241   return remoting::HostMain(argc, argv);
 242 }
 243 #endif  // !defined(OS_WIN)