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Tao Bao6d99d4b2018-04-25 16:47:04 -07001/*
2 * Copyright (C) 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
Tao Bao42c45e22018-07-31 09:37:12 -070017#include <dlfcn.h>
Jerry Zhangf5e319a2018-05-04 11:24:10 -070018#include <errno.h>
19#include <fcntl.h>
20#include <getopt.h>
21#include <inttypes.h>
22#include <limits.h>
23#include <linux/fs.h>
24#include <stdarg.h>
Tao Bao6d99d4b2018-04-25 16:47:04 -070025#include <stdio.h>
26#include <stdlib.h>
Jerry Zhangf5e319a2018-05-04 11:24:10 -070027#include <string.h>
28#include <sys/stat.h>
29#include <sys/types.h>
30#include <time.h>
Tao Bao6d99d4b2018-04-25 16:47:04 -070031#include <unistd.h>
32
Hridya Valsaraju20c81b32018-07-27 22:09:12 -070033#include <atomic>
Jerry Zhangf5e319a2018-05-04 11:24:10 -070034#include <string>
Hridya Valsaraju20c81b32018-07-27 22:09:12 -070035#include <thread>
Jerry Zhangf5e319a2018-05-04 11:24:10 -070036#include <vector>
Tao Bao6d99d4b2018-04-25 16:47:04 -070037
Jerry Zhangf5e319a2018-05-04 11:24:10 -070038#include <android-base/file.h>
Tao Bao6d99d4b2018-04-25 16:47:04 -070039#include <android-base/logging.h>
Jerry Zhangf5e319a2018-05-04 11:24:10 -070040#include <android-base/properties.h>
41#include <android-base/strings.h>
Hridya Valsaraju20c81b32018-07-27 22:09:12 -070042#include <android-base/unique_fd.h>
Jerry Zhangf5e319a2018-05-04 11:24:10 -070043#include <bootloader_message/bootloader_message.h>
44#include <cutils/android_reboot.h>
Hridya Valsaraju20c81b32018-07-27 22:09:12 -070045#include <cutils/sockets.h>
Tao Bao6d99d4b2018-04-25 16:47:04 -070046#include <private/android_logger.h> /* private pmsg functions */
Jerry Zhangf5e319a2018-05-04 11:24:10 -070047#include <selinux/android.h>
48#include <selinux/label.h>
49#include <selinux/selinux.h>
Tao Bao6d99d4b2018-04-25 16:47:04 -070050
51#include "common.h"
Hridya Valsaraju20c81b32018-07-27 22:09:12 -070052#include "fastboot/fastboot.h"
xunchang316e9712019-04-12 16:22:15 -070053#include "install/wipe_data.h"
54#include "otautil/logging.h"
Tao Bao6d99d4b2018-04-25 16:47:04 -070055#include "otautil/paths.h"
xunchang24788852019-03-22 16:08:52 -070056#include "otautil/roots.h"
Jerry Zhangf5e319a2018-05-04 11:24:10 -070057#include "otautil/sysutil.h"
58#include "recovery.h"
Tianjie Xu8f397302018-08-20 13:40:47 -070059#include "recovery_ui/device.h"
60#include "recovery_ui/stub_ui.h"
61#include "recovery_ui/ui.h"
Tao Bao6d99d4b2018-04-25 16:47:04 -070062
Jerry Zhangf5e319a2018-05-04 11:24:10 -070063static constexpr const char* COMMAND_FILE = "/cache/recovery/command";
64static constexpr const char* LOCALE_FILE = "/cache/recovery/last_locale";
65
66static constexpr const char* CACHE_ROOT = "/cache";
67
68bool has_cache = false;
69
70RecoveryUI* ui = nullptr;
71struct selabel_handle* sehandle;
72
Tao Bao6d99d4b2018-04-25 16:47:04 -070073static void UiLogger(android::base::LogId /* id */, android::base::LogSeverity severity,
74 const char* /* tag */, const char* /* file */, unsigned int /* line */,
75 const char* message) {
76 static constexpr char log_characters[] = "VDIWEF";
77 if (severity >= android::base::ERROR && ui != nullptr) {
78 ui->Print("E:%s\n", message);
79 } else {
80 fprintf(stdout, "%c:%s\n", log_characters[severity], message);
81 }
82}
83
Jerry Zhangf5e319a2018-05-04 11:24:10 -070084// command line args come from, in decreasing precedence:
85// - the actual command line
86// - the bootloader control block (one per line, after "recovery")
87// - the contents of COMMAND_FILE (one per line)
88static std::vector<std::string> get_args(const int argc, char** const argv) {
89 CHECK_GT(argc, 0);
90
91 bootloader_message boot = {};
92 std::string err;
93 if (!read_bootloader_message(&boot, &err)) {
94 LOG(ERROR) << err;
95 // If fails, leave a zeroed bootloader_message.
96 boot = {};
97 }
98 stage = std::string(boot.stage);
99
David Andersoneee4e262018-08-21 13:10:45 -0700100 std::string boot_command;
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700101 if (boot.command[0] != 0) {
David Andersoneee4e262018-08-21 13:10:45 -0700102 if (memchr(boot.command, '\0', sizeof(boot.command))) {
103 boot_command = std::string(boot.command);
104 } else {
105 boot_command = std::string(boot.command, sizeof(boot.command));
106 }
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700107 LOG(INFO) << "Boot command: " << boot_command;
108 }
109
110 if (boot.status[0] != 0) {
111 std::string boot_status = std::string(boot.status, sizeof(boot.status));
112 LOG(INFO) << "Boot status: " << boot_status;
113 }
114
115 std::vector<std::string> args(argv, argv + argc);
116
117 // --- if arguments weren't supplied, look in the bootloader control block
118 if (args.size() == 1) {
119 boot.recovery[sizeof(boot.recovery) - 1] = '\0'; // Ensure termination
120 std::string boot_recovery(boot.recovery);
121 std::vector<std::string> tokens = android::base::Split(boot_recovery, "\n");
122 if (!tokens.empty() && tokens[0] == "recovery") {
123 for (auto it = tokens.begin() + 1; it != tokens.end(); it++) {
124 // Skip empty and '\0'-filled tokens.
125 if (!it->empty() && (*it)[0] != '\0') args.push_back(std::move(*it));
126 }
127 LOG(INFO) << "Got " << args.size() << " arguments from boot message";
128 } else if (boot.recovery[0] != 0) {
129 LOG(ERROR) << "Bad boot message: \"" << boot_recovery << "\"";
130 }
131 }
132
133 // --- if that doesn't work, try the command file (if we have /cache).
134 if (args.size() == 1 && has_cache) {
135 std::string content;
136 if (ensure_path_mounted(COMMAND_FILE) == 0 &&
137 android::base::ReadFileToString(COMMAND_FILE, &content)) {
138 std::vector<std::string> tokens = android::base::Split(content, "\n");
139 // All the arguments in COMMAND_FILE are needed (unlike the BCB message,
140 // COMMAND_FILE doesn't use filename as the first argument).
141 for (auto it = tokens.begin(); it != tokens.end(); it++) {
142 // Skip empty and '\0'-filled tokens.
143 if (!it->empty() && (*it)[0] != '\0') args.push_back(std::move(*it));
144 }
145 LOG(INFO) << "Got " << args.size() << " arguments from " << COMMAND_FILE;
146 }
147 }
148
149 // Write the arguments (excluding the filename in args[0]) back into the
150 // bootloader control block. So the device will always boot into recovery to
151 // finish the pending work, until finish_recovery() is called.
152 std::vector<std::string> options(args.cbegin() + 1, args.cend());
153 if (!update_bootloader_message(options, &err)) {
154 LOG(ERROR) << "Failed to set BCB message: " << err;
155 }
156
David Andersoneee4e262018-08-21 13:10:45 -0700157 // Finally, if no arguments were specified, check whether we should boot
158 // into fastboot.
159 if (args.size() == 1 && boot_command == "boot-fastboot") {
160 args.emplace_back("--fastboot");
161 }
162
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700163 return args;
164}
165
166static std::string load_locale_from_cache() {
167 if (ensure_path_mounted(LOCALE_FILE) != 0) {
168 LOG(ERROR) << "Can't mount " << LOCALE_FILE;
169 return "";
170 }
171
172 std::string content;
173 if (!android::base::ReadFileToString(LOCALE_FILE, &content)) {
174 PLOG(ERROR) << "Can't read " << LOCALE_FILE;
175 return "";
176 }
177
178 return android::base::Trim(content);
179}
180
Tao Baoe0cfab32019-03-29 15:53:23 -0700181// Sets the usb config to 'state'.
182static bool SetUsbConfig(const std::string& state) {
183 android::base::SetProperty("sys.usb.config", state);
184 return android::base::WaitForProperty("sys.usb.state", state);
185}
186
Hridya Valsaraju20c81b32018-07-27 22:09:12 -0700187static void ListenRecoverySocket(RecoveryUI* ui, std::atomic<Device::BuiltinAction>& action) {
188 android::base::unique_fd sock_fd(android_get_control_socket("recovery"));
189 if (sock_fd < 0) {
190 PLOG(ERROR) << "Failed to open recovery socket";
191 return;
192 }
193 listen(sock_fd, 4);
194
195 while (true) {
196 android::base::unique_fd connection_fd;
197 connection_fd.reset(accept(sock_fd, nullptr, nullptr));
198 if (connection_fd < 0) {
199 PLOG(ERROR) << "Failed to accept socket connection";
200 continue;
201 }
202 char msg;
203 constexpr char kSwitchToFastboot = 'f';
204 constexpr char kSwitchToRecovery = 'r';
205 ssize_t ret = TEMP_FAILURE_RETRY(read(connection_fd, &msg, sizeof(msg)));
206 if (ret != sizeof(msg)) {
207 PLOG(ERROR) << "Couldn't read from socket";
208 continue;
209 }
210 switch (msg) {
211 case kSwitchToRecovery:
212 action = Device::BuiltinAction::ENTER_RECOVERY;
213 break;
214 case kSwitchToFastboot:
215 action = Device::BuiltinAction::ENTER_FASTBOOT;
216 break;
217 default:
218 LOG(ERROR) << "Unrecognized char from socket " << msg;
219 continue;
220 }
221 ui->InterruptKey();
222 }
223}
224
Tao Bao6d99d4b2018-04-25 16:47:04 -0700225static void redirect_stdio(const char* filename) {
Tao Bao6fcd2082019-01-16 09:29:17 -0800226 android::base::unique_fd pipe_read, pipe_write;
227 // Create a pipe that allows parent process sending logs over.
228 if (!android::base::Pipe(&pipe_read, &pipe_write)) {
229 PLOG(ERROR) << "Failed to create pipe for redirecting stdio";
Tao Bao6d99d4b2018-04-25 16:47:04 -0700230
231 // Fall back to traditional logging mode without timestamps. If these fail, there's not really
232 // anywhere to complain...
233 freopen(filename, "a", stdout);
234 setbuf(stdout, nullptr);
235 freopen(filename, "a", stderr);
236 setbuf(stderr, nullptr);
237
238 return;
239 }
240
241 pid_t pid = fork();
242 if (pid == -1) {
Tao Bao6fcd2082019-01-16 09:29:17 -0800243 PLOG(ERROR) << "Failed to fork for redirecting stdio";
Tao Bao6d99d4b2018-04-25 16:47:04 -0700244
245 // Fall back to traditional logging mode without timestamps. If these fail, there's not really
246 // anywhere to complain...
247 freopen(filename, "a", stdout);
248 setbuf(stdout, nullptr);
249 freopen(filename, "a", stderr);
250 setbuf(stderr, nullptr);
251
252 return;
253 }
254
255 if (pid == 0) {
Tao Bao6fcd2082019-01-16 09:29:17 -0800256 // Child process reads the incoming logs and doesn't write to the pipe.
257 pipe_write.reset();
Tao Bao6d99d4b2018-04-25 16:47:04 -0700258
259 auto start = std::chrono::steady_clock::now();
260
261 // Child logger to actually write to the log file.
262 FILE* log_fp = fopen(filename, "ae");
263 if (log_fp == nullptr) {
264 PLOG(ERROR) << "fopen \"" << filename << "\" failed";
Tao Bao6d99d4b2018-04-25 16:47:04 -0700265 _exit(EXIT_FAILURE);
266 }
267
Tao Bao6fcd2082019-01-16 09:29:17 -0800268 FILE* pipe_fp = android::base::Fdopen(std::move(pipe_read), "r");
Tao Bao6d99d4b2018-04-25 16:47:04 -0700269 if (pipe_fp == nullptr) {
270 PLOG(ERROR) << "fdopen failed";
271 check_and_fclose(log_fp, filename);
Tao Bao6d99d4b2018-04-25 16:47:04 -0700272 _exit(EXIT_FAILURE);
273 }
274
275 char* line = nullptr;
276 size_t len = 0;
277 while (getline(&line, &len, pipe_fp) != -1) {
278 auto now = std::chrono::steady_clock::now();
279 double duration =
280 std::chrono::duration_cast<std::chrono::duration<double>>(now - start).count();
281 if (line[0] == '\n') {
282 fprintf(log_fp, "[%12.6lf]\n", duration);
283 } else {
284 fprintf(log_fp, "[%12.6lf] %s", duration, line);
285 }
286 fflush(log_fp);
287 }
288
289 PLOG(ERROR) << "getline failed";
290
Tao Bao6fcd2082019-01-16 09:29:17 -0800291 fclose(pipe_fp);
Tao Bao6d99d4b2018-04-25 16:47:04 -0700292 free(line);
293 check_and_fclose(log_fp, filename);
Tao Bao6d99d4b2018-04-25 16:47:04 -0700294 _exit(EXIT_FAILURE);
295 } else {
296 // Redirect stdout/stderr to the logger process. Close the unused read end.
Tao Bao6fcd2082019-01-16 09:29:17 -0800297 pipe_read.reset();
Tao Bao6d99d4b2018-04-25 16:47:04 -0700298
299 setbuf(stdout, nullptr);
300 setbuf(stderr, nullptr);
301
Tao Bao6fcd2082019-01-16 09:29:17 -0800302 if (dup2(pipe_write.get(), STDOUT_FILENO) == -1) {
Tao Bao6d99d4b2018-04-25 16:47:04 -0700303 PLOG(ERROR) << "dup2 stdout failed";
304 }
Tao Bao6fcd2082019-01-16 09:29:17 -0800305 if (dup2(pipe_write.get(), STDERR_FILENO) == -1) {
Tao Bao6d99d4b2018-04-25 16:47:04 -0700306 PLOG(ERROR) << "dup2 stderr failed";
307 }
Tao Bao6d99d4b2018-04-25 16:47:04 -0700308 }
309}
310
311int main(int argc, char** argv) {
312 // We don't have logcat yet under recovery; so we'll print error on screen and log to stdout
313 // (which is redirected to recovery.log) as we used to do.
314 android::base::InitLogging(argv, &UiLogger);
315
316 // Take last pmsg contents and rewrite it to the current pmsg session.
317 static constexpr const char filter[] = "recovery/";
318 // Do we need to rotate?
319 bool do_rotate = false;
320
321 __android_log_pmsg_file_read(LOG_ID_SYSTEM, ANDROID_LOG_INFO, filter, logbasename, &do_rotate);
322 // Take action to refresh pmsg contents
323 __android_log_pmsg_file_read(LOG_ID_SYSTEM, ANDROID_LOG_INFO, filter, logrotate, &do_rotate);
324
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700325 time_t start = time(nullptr);
326
Tao Bao6d99d4b2018-04-25 16:47:04 -0700327 // redirect_stdio should be called only in non-sideload mode. Otherwise we may have two logger
328 // instances with different timestamps.
329 redirect_stdio(Paths::Get().temporary_log_file().c_str());
330
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700331 load_volume_table();
332 has_cache = volume_for_mount_point(CACHE_ROOT) != nullptr;
333
334 std::vector<std::string> args = get_args(argc, argv);
Tao Bao1700cc42018-07-16 22:09:59 -0700335 auto args_to_parse = StringVectorToNullTerminatedArray(args);
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700336
337 static constexpr struct option OPTIONS[] = {
Hridya Valsaraju20c81b32018-07-27 22:09:12 -0700338 { "fastboot", no_argument, nullptr, 0 },
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700339 { "locale", required_argument, nullptr, 0 },
340 { "show_text", no_argument, nullptr, 't' },
341 { nullptr, 0, nullptr, 0 },
342 };
343
344 bool show_text = false;
Hridya Valsaraju20c81b32018-07-27 22:09:12 -0700345 bool fastboot = false;
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700346 std::string locale;
347
348 int arg;
349 int option_index;
Tao Bao1700cc42018-07-16 22:09:59 -0700350 while ((arg = getopt_long(args_to_parse.size() - 1, args_to_parse.data(), "", OPTIONS,
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700351 &option_index)) != -1) {
352 switch (arg) {
353 case 't':
354 show_text = true;
355 break;
356 case 0: {
357 std::string option = OPTIONS[option_index].name;
358 if (option == "locale") {
359 locale = optarg;
Hridya Valsaraju7f41a2c2018-09-19 16:29:01 -0700360 } else if (option == "fastboot" &&
Yifan Hongd17174c2018-11-16 12:49:33 -0800361 android::base::GetBoolProperty("ro.boot.dynamic_partitions", false)) {
Hridya Valsaraju20c81b32018-07-27 22:09:12 -0700362 fastboot = true;
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700363 }
364 break;
365 }
366 }
367 }
Jerry Zhang49fd5d22018-05-17 12:54:41 -0700368 optind = 1;
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700369
370 if (locale.empty()) {
371 if (has_cache) {
372 locale = load_locale_from_cache();
373 }
374
375 if (locale.empty()) {
376 static constexpr const char* DEFAULT_LOCALE = "en-US";
377 locale = DEFAULT_LOCALE;
378 }
379 }
380
Tao Bao42c45e22018-07-31 09:37:12 -0700381 static constexpr const char* kDefaultLibRecoveryUIExt = "librecovery_ui_ext.so";
382 // Intentionally not calling dlclose(3) to avoid potential gotchas (e.g. `make_device` may have
383 // handed out pointers to code or static [or thread-local] data and doesn't collect them all back
384 // in on dlclose).
385 void* librecovery_ui_ext = dlopen(kDefaultLibRecoveryUIExt, RTLD_NOW);
386
387 using MakeDeviceType = decltype(&make_device);
388 MakeDeviceType make_device_func = nullptr;
389 if (librecovery_ui_ext == nullptr) {
390 printf("Failed to dlopen %s: %s\n", kDefaultLibRecoveryUIExt, dlerror());
391 } else {
392 reinterpret_cast<void*&>(make_device_func) = dlsym(librecovery_ui_ext, "make_device");
393 if (make_device_func == nullptr) {
394 printf("Failed to dlsym make_device: %s\n", dlerror());
395 }
396 }
397
398 Device* device;
399 if (make_device_func == nullptr) {
400 printf("Falling back to the default make_device() instead\n");
401 device = make_device();
402 } else {
403 printf("Loading make_device from %s\n", kDefaultLibRecoveryUIExt);
404 device = (*make_device_func)();
405 }
406
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700407 if (android::base::GetBoolProperty("ro.boot.quiescent", false)) {
408 printf("Quiescent recovery mode.\n");
409 device->ResetUI(new StubRecoveryUI());
410 } else {
411 if (!device->GetUI()->Init(locale)) {
412 printf("Failed to initialize UI; using stub UI instead.\n");
413 device->ResetUI(new StubRecoveryUI());
414 }
415 }
416 ui = device->GetUI();
417
418 if (!has_cache) {
419 device->RemoveMenuItemForAction(Device::WIPE_CACHE);
420 }
421
Yifan Hongd17174c2018-11-16 12:49:33 -0800422 if (!android::base::GetBoolProperty("ro.boot.dynamic_partitions", false)) {
Hridya Valsarajudaa301e2018-09-18 14:48:01 -0700423 device->RemoveMenuItemForAction(Device::ENTER_FASTBOOT);
424 }
425
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700426 ui->SetBackground(RecoveryUI::NONE);
427 if (show_text) ui->ShowText(true);
428
Hridya Valsaraju20c81b32018-07-27 22:09:12 -0700429 LOG(INFO) << "Starting recovery (pid " << getpid() << ") on " << ctime(&start);
430 LOG(INFO) << "locale is [" << locale << "]";
431
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700432 sehandle = selinux_android_file_context_handle();
433 selinux_android_set_sehandle(sehandle);
434 if (!sehandle) {
435 ui->Print("Warning: No file_contexts\n");
436 }
437
xunchang2239b9e2019-04-15 15:24:24 -0700438 SetLoggingSehandle(sehandle);
xunchang316e9712019-04-12 16:22:15 -0700439
Hridya Valsaraju20c81b32018-07-27 22:09:12 -0700440 std::atomic<Device::BuiltinAction> action;
441 std::thread listener_thread(ListenRecoverySocket, ui, std::ref(action));
442 listener_thread.detach();
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700443
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700444 while (true) {
Hridya Valsaraju20c81b32018-07-27 22:09:12 -0700445 std::string usb_config = fastboot ? "fastboot" : is_ro_debuggable() ? "adb" : "none";
446 std::string usb_state = android::base::GetProperty("sys.usb.state", "none");
447 if (usb_config != usb_state) {
448 if (!SetUsbConfig("none")) {
449 LOG(ERROR) << "Failed to clear USB config";
450 }
451 if (!SetUsbConfig(usb_config)) {
452 LOG(ERROR) << "Failed to set USB config to " << usb_config;
453 }
454 }
455
David Anderson983e2d52019-01-02 11:35:38 -0800456 ui->SetEnableFastbootdLogo(fastboot);
457
Hridya Valsaraju20c81b32018-07-27 22:09:12 -0700458 auto ret = fastboot ? StartFastboot(device, args) : start_recovery(device, args);
459
460 if (ret == Device::KEY_INTERRUPTED) {
461 ret = action.exchange(ret);
462 if (ret == Device::NO_ACTION) {
463 continue;
464 }
465 }
466 switch (ret) {
467 case Device::SHUTDOWN:
468 ui->Print("Shutting down...\n");
469 android::base::SetProperty(ANDROID_RB_PROPERTY, "shutdown,");
470 break;
471
472 case Device::REBOOT_BOOTLOADER:
473 ui->Print("Rebooting to bootloader...\n");
474 android::base::SetProperty(ANDROID_RB_PROPERTY, "reboot,bootloader");
475 break;
476
477 case Device::ENTER_FASTBOOT:
David Anderson2b2f4232018-10-29 18:48:56 -0700478 if (logical_partitions_mapped()) {
479 ui->Print("Partitions may be mounted - rebooting to enter fastboot.");
480 android::base::SetProperty(ANDROID_RB_PROPERTY, "reboot,fastboot");
481 } else {
482 LOG(INFO) << "Entering fastboot";
483 fastboot = true;
484 }
Hridya Valsaraju20c81b32018-07-27 22:09:12 -0700485 break;
486
487 case Device::ENTER_RECOVERY:
488 LOG(INFO) << "Entering recovery";
489 fastboot = false;
490 break;
491
492 default:
493 ui->Print("Rebooting...\n");
494 reboot("reboot,");
495 break;
496 }
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700497 }
Hridya Valsaraju20c81b32018-07-27 22:09:12 -0700498
Jerry Zhangf5e319a2018-05-04 11:24:10 -0700499 // Should be unreachable.
500 return EXIT_SUCCESS;
Tao Bao6d99d4b2018-04-25 16:47:04 -0700501}