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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// On Mac, shortcuts can't have command-line arguments. Instead, produce small
// app bundles which locate the Chromium framework and load it, passing the
// appropriate data. This is the code for such an app bundle. It should be kept
// minimal and do as little work as possible (with as much work done on
// framework side as possible).
#include <dlfcn.h>
#import <Cocoa/Cocoa.h>
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/logging.h"
#include "base/mac/foundation_util.h"
#include "base/mac/launch_services_util.h"
#include "base/mac/scoped_nsautorelease_pool.h"
#include "base/process/launch.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/sys_string_conversions.h"
#include "chrome/common/chrome_constants.h"
#include "chrome/common/chrome_switches.h"
#import "chrome/common/mac/app_mode_chrome_locator.h"
#include "chrome/common/mac/app_mode_common.h"
namespace {
typedef int (*StartFun)(const app_mode::ChromeAppModeInfo*);
int LoadFrameworkAndStart(app_mode::ChromeAppModeInfo* info) {
using base::SysNSStringToUTF8;
using base::SysNSStringToUTF16;
using base::mac::CFToNSCast;
using base::mac::CFCastStrict;
using base::mac::NSToCFCast;
base::mac::ScopedNSAutoreleasePool scoped_pool;
// Get the current main bundle, i.e., that of the app loader that's running.
NSBundle* app_bundle = [NSBundle mainBundle];
CHECK(app_bundle) << "couldn't get loader bundle";
// ** 1: Get path to outer Chrome bundle.
// Get the bundle ID of the browser that created this app bundle.
NSString* cr_bundle_id = base::mac::ObjCCast<NSString>(
[app_bundle objectForInfoDictionaryKey:app_mode::kBrowserBundleIDKey]);
CHECK(cr_bundle_id) << "couldn't get browser bundle ID";
// First check if Chrome exists at the last known location.
base::FilePath cr_bundle_path;
NSString* cr_bundle_path_ns =
[CFToNSCast(CFCastStrict<CFStringRef>(CFPreferencesCopyAppValue(
NSToCFCast(app_mode::kLastRunAppBundlePathPrefsKey),
NSToCFCast(cr_bundle_id)))) autorelease];
cr_bundle_path = base::mac::NSStringToFilePath(cr_bundle_path_ns);
bool found_bundle =
!cr_bundle_path.empty() && base::DirectoryExists(cr_bundle_path);
if (!found_bundle) {
// If no such bundle path exists, try to search by bundle ID.
if (!app_mode::FindBundleById(cr_bundle_id, &cr_bundle_path)) {
// TODO(jeremy): Display UI to allow user to manually locate the Chrome
// bundle.
LOG(FATAL) << "Failed to locate bundle by identifier";
}
}
// ** 2: Read the running Chrome version.
// The user_data_dir for shims actually contains the app_data_path.
// I.e. <user_data_dir>/<profile_dir>/Web Applications/_crx_extensionid/
base::FilePath app_data_dir = base::mac::NSStringToFilePath([app_bundle
objectForInfoDictionaryKey:app_mode::kCrAppModeUserDataDirKey]);
base::FilePath user_data_dir = app_data_dir.DirName().DirName().DirName();
CHECK(!user_data_dir.empty());
// If the version file does not exist, |cr_version_str| will be empty and
// app_mode::GetChromeBundleInfo will default to the latest version.
base::FilePath cr_version_str;
base::ReadSymbolicLink(
user_data_dir.Append(app_mode::kRunningChromeVersionSymlinkName),
&cr_version_str);
// If the version file does exist, it may have been left by a crashed Chrome
// process. Ensure the process is still running.
if (!cr_version_str.empty()) {
NSArray* existing_chrome = [NSRunningApplication
runningApplicationsWithBundleIdentifier:cr_bundle_id];
if ([existing_chrome count] == 0)
cr_version_str.clear();
}
// ** 3: Read information from the Chrome bundle.
base::FilePath executable_path;
base::FilePath version_path;
base::FilePath framework_shlib_path;
if (!app_mode::GetChromeBundleInfo(cr_bundle_path,
cr_version_str.value(),
&executable_path,
&version_path,
&framework_shlib_path)) {
LOG(FATAL) << "Couldn't ready Chrome bundle info";
}
base::FilePath app_mode_bundle_path =
base::mac::NSStringToFilePath([app_bundle bundlePath]);
// ** 4: Fill in ChromeAppModeInfo.
info->chrome_outer_bundle_path = cr_bundle_path;
info->chrome_versioned_path = version_path;
info->app_mode_bundle_path = app_mode_bundle_path;
// Read information about the this app shortcut from the Info.plist.
// Don't check for null-ness on optional items.
NSDictionary* info_plist = [app_bundle infoDictionary];
CHECK(info_plist) << "couldn't get loader Info.plist";
info->app_mode_id = SysNSStringToUTF8(
[info_plist objectForKey:app_mode::kCrAppModeShortcutIDKey]);
CHECK(info->app_mode_id.size()) << "couldn't get app shortcut ID";
info->app_mode_name = SysNSStringToUTF16(
[info_plist objectForKey:app_mode::kCrAppModeShortcutNameKey]);
info->app_mode_url = SysNSStringToUTF8(
[info_plist objectForKey:app_mode::kCrAppModeShortcutURLKey]);
info->user_data_dir = base::mac::NSStringToFilePath(
[info_plist objectForKey:app_mode::kCrAppModeUserDataDirKey]);
info->profile_dir = base::mac::NSStringToFilePath(
[info_plist objectForKey:app_mode::kCrAppModeProfileDirKey]);
// ** 5: Open the framework.
StartFun ChromeAppModeStart = NULL;
void* cr_dylib = dlopen(framework_shlib_path.value().c_str(), RTLD_LAZY);
if (cr_dylib) {
// Find the entry point.
ChromeAppModeStart = (StartFun)dlsym(cr_dylib, "ChromeAppModeStart");
if (!ChromeAppModeStart)
LOG(ERROR) << "Couldn't get entry point: " << dlerror();
} else {
LOG(ERROR) << "Couldn't load framework: " << dlerror();
}
if (ChromeAppModeStart)
return ChromeAppModeStart(info);
LOG(ERROR) << "Loading Chrome failed, launching Chrome with command line";
base::CommandLine command_line(executable_path);
// The user_data_dir from the plist is actually the app data dir.
command_line.AppendSwitchPath(
switches::kUserDataDir,
info->user_data_dir.DirName().DirName().DirName());
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
app_mode::kLaunchedByChromeProcessId) ||
info->app_mode_id == app_mode::kAppListModeId) {
// Pass --app-shim-error to have Chrome rebuild this shim.
// If Chrome has rebuilt this shim once already, then rebuilding doesn't fix
// the problem, so don't try again.
if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
app_mode::kLaunchedAfterRebuild)) {
command_line.AppendSwitchPath(app_mode::kAppShimError,
app_mode_bundle_path);
}
} else {
// If the shim was launched directly (instead of by Chrome), first ask
// Chrome to launch the app. Chrome will launch the shim again, the same
// error will occur and be handled above. This approach allows the app to be
// started without blocking on fixing the shim and guarantees that the
// profile is loaded when Chrome receives --app-shim-error.
command_line.AppendSwitchPath(switches::kProfileDirectory,
info->profile_dir);
command_line.AppendSwitchASCII(switches::kAppId, info->app_mode_id);
}
// Launch the executable directly since base::mac::OpenApplicationWithPath
// uses LSOpenApplication which doesn't pass command line arguments if the
// application is already running.
if (!base::LaunchProcess(command_line, base::LaunchOptions()).IsValid()) {
LOG(ERROR) << "Could not launch Chrome: "
<< command_line.GetCommandLineString();
return 1;
}
return 0;
}
} // namespace
__attribute__((visibility("default")))
int main(int argc, char** argv) {
base::CommandLine::Init(argc, argv);
app_mode::ChromeAppModeInfo info;
// Hard coded info parameters.
info.major_version = app_mode::kCurrentChromeAppModeInfoMajorVersion;
info.minor_version = app_mode::kCurrentChromeAppModeInfoMinorVersion;
info.argc = argc;
info.argv = argv;
// Exit instead of returning to avoid the the removal of |main()| from stack
// backtraces under tail call optimization.
exit(LoadFrameworkAndStart(&info));
}
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