1 // Copyright (c) 2012 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.
5 // On Mac, shortcuts can't have command-line arguments. Instead, produce small
6 // app bundles which locate the Chromium framework and load it, passing the
7 // appropriate data. This is the code for such an app bundle. It should be kept
8 // minimal and do as little work as possible (with as much work done on
9 // framework side as possible).
13 #import <Cocoa/Cocoa.h>
15 #include "base/command_line.h"
16 #include "base/files/file_path.h"
17 #include "base/files/file_util.h"
18 #include "base/logging.h"
19 #include "base/mac/foundation_util.h"
20 #include "base/mac/launch_services_util.h"
21 #include "base/mac/scoped_nsautorelease_pool.h"
22 #include "base/process/launch.h"
23 #include "base/strings/string_number_conversions.h"
24 #include "base/strings/sys_string_conversions.h"
25 #include "chrome/common/chrome_constants.h"
26 #include "chrome/common/chrome_switches.h"
27 #import "chrome/common/mac/app_mode_chrome_locator.h"
28 #include "chrome/common/mac/app_mode_common.h"
32 typedef int (*StartFun)(const app_mode::ChromeAppModeInfo*);
34 int LoadFrameworkAndStart(app_mode::ChromeAppModeInfo* info) {
35 using base::SysNSStringToUTF8;
36 using base::SysNSStringToUTF16;
37 using base::mac::CFToNSCast;
38 using base::mac::CFCastStrict;
39 using base::mac::NSToCFCast;
41 base::mac::ScopedNSAutoreleasePool scoped_pool;
43 // Get the current main bundle, i.e., that of the app loader that's running.
44 NSBundle* app_bundle = [NSBundle mainBundle];
45 CHECK(app_bundle) << "couldn't get loader bundle";
47 // ** 1: Get path to outer Chrome bundle.
48 // Get the bundle ID of the browser that created this app bundle.
49 NSString* cr_bundle_id = base::mac::ObjCCast<NSString>(
50 [app_bundle objectForInfoDictionaryKey:app_mode::kBrowserBundleIDKey]);
51 CHECK(cr_bundle_id) << "couldn't get browser bundle ID";
53 // First check if Chrome exists at the last known location.
54 base::FilePath cr_bundle_path;
55 NSString* cr_bundle_path_ns =
56 [CFToNSCast(CFCastStrict<CFStringRef>(CFPreferencesCopyAppValue(
57 NSToCFCast(app_mode::kLastRunAppBundlePathPrefsKey),
58 NSToCFCast(cr_bundle_id)))) autorelease];
59 cr_bundle_path = base::mac::NSStringToFilePath(cr_bundle_path_ns);
61 !cr_bundle_path.empty() && base::DirectoryExists(cr_bundle_path);
64 // If no such bundle path exists, try to search by bundle ID.
65 if (!app_mode::FindBundleById(cr_bundle_id, &cr_bundle_path)) {
66 // TODO(jeremy): Display UI to allow user to manually locate the Chrome
68 LOG(FATAL) << "Failed to locate bundle by identifier";
72 // ** 2: Read the running Chrome version.
73 // The user_data_dir for shims actually contains the app_data_path.
74 // I.e. <user_data_dir>/<profile_dir>/Web Applications/_crx_extensionid/
75 base::FilePath app_data_dir = base::mac::NSStringToFilePath([app_bundle
76 objectForInfoDictionaryKey:app_mode::kCrAppModeUserDataDirKey]);
77 base::FilePath user_data_dir = app_data_dir.DirName().DirName().DirName();
78 CHECK(!user_data_dir.empty());
80 // If the version file does not exist, |cr_version_str| will be empty and
81 // app_mode::GetChromeBundleInfo will default to the latest version.
82 base::FilePath cr_version_str;
83 base::ReadSymbolicLink(
84 user_data_dir.Append(app_mode::kRunningChromeVersionSymlinkName),
87 // If the version file does exist, it may have been left by a crashed Chrome
88 // process. Ensure the process is still running.
89 if (!cr_version_str.empty()) {
90 NSArray* existing_chrome = [NSRunningApplication
91 runningApplicationsWithBundleIdentifier:cr_bundle_id];
92 if ([existing_chrome count] == 0)
93 cr_version_str.clear();
96 // ** 3: Read information from the Chrome bundle.
97 base::FilePath executable_path;
98 base::FilePath version_path;
99 base::FilePath framework_shlib_path;
100 if (!app_mode::GetChromeBundleInfo(cr_bundle_path,
101 cr_version_str.value(),
104 &framework_shlib_path)) {
105 LOG(FATAL) << "Couldn't ready Chrome bundle info";
107 base::FilePath app_mode_bundle_path =
108 base::mac::NSStringToFilePath([app_bundle bundlePath]);
110 // ** 4: Fill in ChromeAppModeInfo.
111 info->chrome_outer_bundle_path = cr_bundle_path;
112 info->chrome_versioned_path = version_path;
113 info->app_mode_bundle_path = app_mode_bundle_path;
115 // Read information about the this app shortcut from the Info.plist.
116 // Don't check for null-ness on optional items.
117 NSDictionary* info_plist = [app_bundle infoDictionary];
118 CHECK(info_plist) << "couldn't get loader Info.plist";
120 info->app_mode_id = SysNSStringToUTF8(
121 [info_plist objectForKey:app_mode::kCrAppModeShortcutIDKey]);
122 CHECK(info->app_mode_id.size()) << "couldn't get app shortcut ID";
124 info->app_mode_name = SysNSStringToUTF16(
125 [info_plist objectForKey:app_mode::kCrAppModeShortcutNameKey]);
127 info->app_mode_url = SysNSStringToUTF8(
128 [info_plist objectForKey:app_mode::kCrAppModeShortcutURLKey]);
130 info->user_data_dir = base::mac::NSStringToFilePath(
131 [info_plist objectForKey:app_mode::kCrAppModeUserDataDirKey]);
133 info->profile_dir = base::mac::NSStringToFilePath(
134 [info_plist objectForKey:app_mode::kCrAppModeProfileDirKey]);
136 // ** 5: Open the framework.
137 StartFun ChromeAppModeStart = NULL;
138 void* cr_dylib = dlopen(framework_shlib_path.value().c_str(), RTLD_LAZY);
140 // Find the entry point.
141 ChromeAppModeStart = (StartFun)dlsym(cr_dylib, "ChromeAppModeStart");
142 if (!ChromeAppModeStart)
143 LOG(ERROR) << "Couldn't get entry point: " << dlerror();
145 LOG(ERROR) << "Couldn't load framework: " << dlerror();
148 if (ChromeAppModeStart)
149 return ChromeAppModeStart(info);
151 LOG(ERROR) << "Loading Chrome failed, launching Chrome with command line";
152 base::CommandLine command_line(executable_path);
153 // The user_data_dir from the plist is actually the app data dir.
154 command_line.AppendSwitchPath(
155 switches::kUserDataDir,
156 info->user_data_dir.DirName().DirName().DirName());
157 if (base::CommandLine::ForCurrentProcess()->HasSwitch(
158 app_mode::kLaunchedByChromeProcessId) ||
159 info->app_mode_id == app_mode::kAppListModeId) {
160 // Pass --app-shim-error to have Chrome rebuild this shim.
161 // If Chrome has rebuilt this shim once already, then rebuilding doesn't fix
162 // the problem, so don't try again.
163 if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
164 app_mode::kLaunchedAfterRebuild)) {
165 command_line.AppendSwitchPath(app_mode::kAppShimError,
166 app_mode_bundle_path);
169 // If the shim was launched directly (instead of by Chrome), first ask
170 // Chrome to launch the app. Chrome will launch the shim again, the same
171 // error will occur and be handled above. This approach allows the app to be
172 // started without blocking on fixing the shim and guarantees that the
173 // profile is loaded when Chrome receives --app-shim-error.
174 command_line.AppendSwitchPath(switches::kProfileDirectory,
176 command_line.AppendSwitchASCII(switches::kAppId, info->app_mode_id);
178 // Launch the executable directly since base::mac::OpenApplicationWithPath
179 // uses LSOpenApplication which doesn't pass command line arguments if the
180 // application is already running.
181 if (!base::LaunchProcess(command_line, base::LaunchOptions()).IsValid()) {
182 LOG(ERROR) << "Could not launch Chrome: "
183 << command_line.GetCommandLineString();
192 __attribute__((visibility("default")))
193 int main(int argc, char** argv) {
194 base::CommandLine::Init(argc, argv);
195 app_mode::ChromeAppModeInfo info;
197 // Hard coded info parameters.
198 info.major_version = app_mode::kCurrentChromeAppModeInfoMajorVersion;
199 info.minor_version = app_mode::kCurrentChromeAppModeInfoMinorVersion;
203 // Exit instead of returning to avoid the the removal of |main()| from stack
204 // backtraces under tail call optimization.
205 exit(LoadFrameworkAndStart(&info));