chrome/browser/browser_main_gtk.cc

   1 // Copyright (c) 2011 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 "chrome/browser/browser_main_gtk.h"
   6
   7 #include <gtk/gtk.h>
   8 #include <sys/stat.h>
   9 #include <sys/types.h>
  10 #include <unistd.h>
  11
  12 #include "base/command_line.h"
  13 #include "base/debug/debugger.h"
  14 #include "chrome/browser/browser_main_win.h"
  15 #include "chrome/browser/metrics/metrics_service.h"
  16 #include "chrome/browser/ui/browser_list.h"
  17 #include "chrome/common/chrome_switches.h"
  18 #include "content/browser/renderer_host/render_sandbox_host_linux.h"
  19 #include "content/browser/zygote_host_linux.h"
  20 #include "content/common/result_codes.h"
  21 #include "grit/chromium_strings.h"
  22 #include "grit/generated_resources.h"
  23 #include "ui/base/l10n/l10n_util.h"
  24 #include "ui/base/resource/resource_bundle.h"
  25 #include "ui/base/x/x11_util.h"
  26 #include "ui/base/x/x11_util_internal.h"
  27 #include "ui/gfx/gtk_util.h"
  28
  29 #if defined(USE_NSS)
  30 #include "crypto/nss_util.h"
  31 #endif
  32
  33 #if defined(USE_LINUX_BREAKPAD)
  34 #include "chrome/app/breakpad_linux.h"
  35 #endif
  36
  37 namespace {
  38
  39 // Indicates that we're currently responding to an IO error (by shutting down).
  40 bool g_in_x11_io_error_handler = false;
  41
  42 // Number of seconds to wait for UI thread to get an IO error if we get it on
  43 // the background thread.
  44 const int kWaitForUIThreadSeconds = 10;
  45
  46 int BrowserX11ErrorHandler(Display* d, XErrorEvent* error) {
  47   if (!g_in_x11_io_error_handler)
  48     MessageLoop::current()->PostTask(
  49         FROM_HERE,
  50         NewRunnableFunction(ui::LogErrorEventDescription, d, *error));
  51   return 0;
  52 }
  53
  54
  55 // This function is used to help us diagnose crash dumps that happen
  56 // during the shutdown process.
  57 NOINLINE void WaitingForUIThreadToHandleIOError() {
  58   // Ensure function isn't optimized away.
  59   asm("");
  60   sleep(kWaitForUIThreadSeconds);
  61 }
  62
  63 int BrowserX11IOErrorHandler(Display* d) {
  64   if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
  65     // Wait for the UI thread (which has a different connection to the X server)
  66     // to get the error. We can't call shutdown from this thread without
  67     // tripping an error. Doing it through a function so that we'll be able
  68     // to see it in any crash dumps.
  69     WaitingForUIThreadToHandleIOError();
  70     return 0;
  71   }
  72   // If there's an IO error it likely means the X server has gone away
  73   if (!g_in_x11_io_error_handler) {
  74     g_in_x11_io_error_handler = true;
  75     LOG(ERROR) << "X IO Error detected";
  76     BrowserList::SessionEnding();
  77   }
  78
  79   return 0;
  80 }
  81
  82 }  // namespace
  83
  84 void BrowserMainPartsGtk::PreEarlyInitialization() {
  85   DetectRunningAsRoot();
  86
  87   BrowserMainPartsPosix::PreEarlyInitialization();
  88
  89   SetupSandbox();
  90
  91 #if defined(USE_NSS)
  92   // We want to be sure to init NSPR on the main thread.
  93   crypto::EnsureNSPRInit();
  94 #endif
  95 }
  96
  97 void BrowserMainPartsGtk::DetectRunningAsRoot() {
  98   if (geteuid() == 0) {
  99     const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 100     if (parsed_command_line().HasSwitch(switches::kUserDataDir))
 101       return;
 102
 103     gfx::GtkInitFromCommandLine(command_line);
 104
 105     // Get just enough of our resource machinery up so we can extract the
 106     // locale appropriate string. Note that the GTK implementation ignores the
 107     // passed in parameter and checks the LANG environment variables instead.
 108     ResourceBundle::InitSharedInstance("");
 109
 110     std::string message = l10n_util::GetStringFUTF8(
 111             IDS_REFUSE_TO_RUN_AS_ROOT,
 112             l10n_util::GetStringUTF16(IDS_PRODUCT_NAME));
 113     GtkWidget* dialog = gtk_message_dialog_new(
 114         NULL,
 115         static_cast<GtkDialogFlags>(0),
 116         GTK_MESSAGE_ERROR,
 117         GTK_BUTTONS_CLOSE,
 118         "%s",
 119         message.c_str());
 120
 121     LOG(ERROR) << "Startup refusing to run as root.";
 122     message = l10n_util::GetStringFUTF8(
 123         IDS_REFUSE_TO_RUN_AS_ROOT_2,
 124         l10n_util::GetStringUTF16(IDS_PRODUCT_NAME));
 125     gtk_message_dialog_format_secondary_text(GTK_MESSAGE_DIALOG(dialog),
 126                                              "%s",
 127                                              message.c_str());
 128
 129     message = l10n_util::GetStringUTF8(IDS_PRODUCT_NAME);
 130     gtk_window_set_title(GTK_WINDOW(dialog), message.c_str());
 131
 132     gtk_dialog_run(GTK_DIALOG(dialog));
 133     gtk_widget_destroy(dialog);
 134     exit(EXIT_FAILURE);
 135   }
 136 }
 137
 138 void BrowserMainPartsGtk::SetupSandbox() {
 139   // TODO(evanm): move this into SandboxWrapper; I'm just trying to move this
 140   // code en masse out of chrome_main for now.
 141   const char* sandbox_binary = NULL;
 142   struct stat st;
 143
 144   // In Chromium branded builds, developers can set an environment variable to
 145   // use the development sandbox. See
 146   // http://code.google.com/p/chromium/wiki/LinuxSUIDSandboxDevelopment
 147   if (stat("/proc/self/exe", &st) == 0 && st.st_uid == getuid())
 148     sandbox_binary = getenv("CHROME_DEVEL_SANDBOX");
 149
 150 #if defined(LINUX_SANDBOX_PATH)
 151   if (!sandbox_binary)
 152     sandbox_binary = LINUX_SANDBOX_PATH;
 153 #endif
 154
 155   std::string sandbox_cmd;
 156   if (sandbox_binary && !parsed_command_line().HasSwitch(switches::kNoSandbox))
 157     sandbox_cmd = sandbox_binary;
 158
 159   // Tickle the sandbox host and zygote host so they fork now.
 160   RenderSandboxHostLinux* shost = RenderSandboxHostLinux::GetInstance();
 161   shost->Init(sandbox_cmd);
 162   ZygoteHost* zhost = ZygoteHost::GetInstance();
 163   zhost->Init(sandbox_cmd);
 164 }
 165
 166 void DidEndMainMessageLoop() {
 167 }
 168
 169 void RecordBreakpadStatusUMA(MetricsService* metrics) {
 170 #if defined(USE_LINUX_BREAKPAD)
 171   metrics->RecordBreakpadRegistration(IsCrashReporterEnabled());
 172 #else
 173   metrics->RecordBreakpadRegistration(false);
 174 #endif
 175   metrics->RecordBreakpadHasDebugger(base::debug::BeingDebugged());
 176 }
 177
 178 void WarnAboutMinimumSystemRequirements() {
 179   // Nothing to warn about on GTK right now.
 180 }
 181
 182 void RecordBrowserStartupTime() {
 183   // Not implemented on GTK for now.
 184 }
 185
 186 // From browser_main_win.h, stubs until we figure out the right thing...
 187
 188 int DoUninstallTasks(bool chrome_still_running) {
 189   return ResultCodes::NORMAL_EXIT;
 190 }
 191
 192 int HandleIconsCommands(const CommandLine &parsed_command_line) {
 193   return 0;
 194 }
 195
 196 bool CheckMachineLevelInstall() {
 197   return false;
 198 }
 199
 200 void PrepareRestartOnCrashEnviroment(const CommandLine &parsed_command_line) {
 201 }
 202
 203 void SetBrowserX11ErrorHandlers() {
 204   // Set up error handlers to make sure profile gets written if X server
 205   // goes away.
 206   ui::SetX11ErrorHandlers(BrowserX11ErrorHandler, BrowserX11IOErrorHandler);
 207 }
 208
 209 #if !defined(OS_CHROMEOS)
 210 // static
 211 BrowserMainParts* BrowserMainParts::CreateBrowserMainParts(
 212     const MainFunctionParams& parameters) {
 213   return new BrowserMainPartsGtk(parameters);
 214 }
 215 #endif