From f5e319ac96a565d8ea3ff984b0f9f34fc4b6f157 Mon Sep 17 00:00:00 2001 From: Jerry Zhang Date: Fri, 4 May 2018 11:24:10 -0700 Subject: recovery: Refactor common setup into main() Move more common setup into the main function. Main() handles all 1 time setup, such as ui, logging, and secontext. Recovery_main() takes in command line arguments, does any necessary recovery work, and can be called multiple times from main(). Test: Recovery works Bug: 78793464 Change-Id: I2d2595fc342b4ddfa80f4e06b30e44263132acd9 Merged-In: I2d2595fc342b4ddfa80f4e06b30e44263132acd9 --- recovery_main.cpp | 226 +++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 223 insertions(+), 3 deletions(-) (limited to 'recovery_main.cpp') diff --git a/recovery_main.cpp b/recovery_main.cpp index 3147511ee..e21c782d0 100644 --- a/recovery_main.cpp +++ b/recovery_main.cpp @@ -14,22 +14,57 @@ * limitations under the License. */ +#include +#include +#include +#include +#include +#include +#include #include #include +#include +#include +#include +#include #include -#include +#include +#include +#include +#include #include +#include +#include +#include +#include #include /* private pmsg functions */ +#include +#include +#include #include "common.h" +#include "device.h" #include "logging.h" #include "minadbd/minadbd.h" #include "otautil/paths.h" -#include "private/recovery.h" +#include "otautil/sysutil.h" +#include "recovery.h" +#include "roots.h" +#include "stub_ui.h" #include "ui.h" +static constexpr const char* COMMAND_FILE = "/cache/recovery/command"; +static constexpr const char* LOCALE_FILE = "/cache/recovery/last_locale"; + +static constexpr const char* CACHE_ROOT = "/cache"; + +bool has_cache = false; + +RecoveryUI* ui = nullptr; +struct selabel_handle* sehandle; + static void UiLogger(android::base::LogId /* id */, android::base::LogSeverity severity, const char* /* tag */, const char* /* file */, unsigned int /* line */, const char* message) { @@ -41,6 +76,92 @@ static void UiLogger(android::base::LogId /* id */, android::base::LogSeverity s } } +// command line args come from, in decreasing precedence: +// - the actual command line +// - the bootloader control block (one per line, after "recovery") +// - the contents of COMMAND_FILE (one per line) +static std::vector get_args(const int argc, char** const argv) { + CHECK_GT(argc, 0); + + bootloader_message boot = {}; + std::string err; + if (!read_bootloader_message(&boot, &err)) { + LOG(ERROR) << err; + // If fails, leave a zeroed bootloader_message. + boot = {}; + } + stage = std::string(boot.stage); + + if (boot.command[0] != 0) { + std::string boot_command = std::string(boot.command, sizeof(boot.command)); + LOG(INFO) << "Boot command: " << boot_command; + } + + if (boot.status[0] != 0) { + std::string boot_status = std::string(boot.status, sizeof(boot.status)); + LOG(INFO) << "Boot status: " << boot_status; + } + + std::vector args(argv, argv + argc); + + // --- if arguments weren't supplied, look in the bootloader control block + if (args.size() == 1) { + boot.recovery[sizeof(boot.recovery) - 1] = '\0'; // Ensure termination + std::string boot_recovery(boot.recovery); + std::vector tokens = android::base::Split(boot_recovery, "\n"); + if (!tokens.empty() && tokens[0] == "recovery") { + for (auto it = tokens.begin() + 1; it != tokens.end(); it++) { + // Skip empty and '\0'-filled tokens. + if (!it->empty() && (*it)[0] != '\0') args.push_back(std::move(*it)); + } + LOG(INFO) << "Got " << args.size() << " arguments from boot message"; + } else if (boot.recovery[0] != 0) { + LOG(ERROR) << "Bad boot message: \"" << boot_recovery << "\""; + } + } + + // --- if that doesn't work, try the command file (if we have /cache). + if (args.size() == 1 && has_cache) { + std::string content; + if (ensure_path_mounted(COMMAND_FILE) == 0 && + android::base::ReadFileToString(COMMAND_FILE, &content)) { + std::vector tokens = android::base::Split(content, "\n"); + // All the arguments in COMMAND_FILE are needed (unlike the BCB message, + // COMMAND_FILE doesn't use filename as the first argument). + for (auto it = tokens.begin(); it != tokens.end(); it++) { + // Skip empty and '\0'-filled tokens. + if (!it->empty() && (*it)[0] != '\0') args.push_back(std::move(*it)); + } + LOG(INFO) << "Got " << args.size() << " arguments from " << COMMAND_FILE; + } + } + + // Write the arguments (excluding the filename in args[0]) back into the + // bootloader control block. So the device will always boot into recovery to + // finish the pending work, until finish_recovery() is called. + std::vector options(args.cbegin() + 1, args.cend()); + if (!update_bootloader_message(options, &err)) { + LOG(ERROR) << "Failed to set BCB message: " << err; + } + + return args; +} + +static std::string load_locale_from_cache() { + if (ensure_path_mounted(LOCALE_FILE) != 0) { + LOG(ERROR) << "Can't mount " << LOCALE_FILE; + return ""; + } + + std::string content; + if (!android::base::ReadFileToString(LOCALE_FILE, &content)) { + PLOG(ERROR) << "Can't read " << LOCALE_FILE; + return ""; + } + + return android::base::Trim(content); +} + static void redirect_stdio(const char* filename) { int pipefd[2]; if (pipe(pipefd) == -1) { @@ -154,9 +275,108 @@ int main(int argc, char** argv) { return 0; } + time_t start = time(nullptr); + // redirect_stdio should be called only in non-sideload mode. Otherwise we may have two logger // instances with different timestamps. redirect_stdio(Paths::Get().temporary_log_file().c_str()); - return start_recovery(argc, argv); + printf("Starting recovery (pid %d) on %s", getpid(), ctime(&start)); + + load_volume_table(); + has_cache = volume_for_mount_point(CACHE_ROOT) != nullptr; + + std::vector args = get_args(argc, argv); + std::vector args_to_parse(args.size()); + std::transform(args.cbegin(), args.cend(), args_to_parse.begin(), + [](const std::string& arg) { return const_cast(arg.c_str()); }); + + static constexpr struct option OPTIONS[] = { + { "locale", required_argument, nullptr, 0 }, + { "show_text", no_argument, nullptr, 't' }, + { nullptr, 0, nullptr, 0 }, + }; + + bool show_text = false; + std::string locale; + + int arg; + int option_index; + while ((arg = getopt_long(args_to_parse.size(), args_to_parse.data(), "", OPTIONS, + &option_index)) != -1) { + switch (arg) { + case 't': + show_text = true; + break; + case 0: { + std::string option = OPTIONS[option_index].name; + if (option == "locale") { + locale = optarg; + } + break; + } + } + } + + if (locale.empty()) { + if (has_cache) { + locale = load_locale_from_cache(); + } + + if (locale.empty()) { + static constexpr const char* DEFAULT_LOCALE = "en-US"; + locale = DEFAULT_LOCALE; + } + } + + printf("locale is [%s]\n", locale.c_str()); + + Device* device = make_device(); + if (android::base::GetBoolProperty("ro.boot.quiescent", false)) { + printf("Quiescent recovery mode.\n"); + device->ResetUI(new StubRecoveryUI()); + } else { + if (!device->GetUI()->Init(locale)) { + printf("Failed to initialize UI; using stub UI instead.\n"); + device->ResetUI(new StubRecoveryUI()); + } + } + ui = device->GetUI(); + + if (!has_cache) { + device->RemoveMenuItemForAction(Device::WIPE_CACHE); + } + + ui->SetBackground(RecoveryUI::NONE); + if (show_text) ui->ShowText(true); + + sehandle = selinux_android_file_context_handle(); + selinux_android_set_sehandle(sehandle); + if (!sehandle) { + ui->Print("Warning: No file_contexts\n"); + } + + Device::BuiltinAction after = start_recovery(device, args); + + switch (after) { + case Device::SHUTDOWN: + ui->Print("Shutting down...\n"); + android::base::SetProperty(ANDROID_RB_PROPERTY, "shutdown,"); + break; + + case Device::REBOOT_BOOTLOADER: + ui->Print("Rebooting to bootloader...\n"); + android::base::SetProperty(ANDROID_RB_PROPERTY, "reboot,bootloader"); + break; + + default: + ui->Print("Rebooting...\n"); + reboot("reboot,"); + break; + } + while (true) { + pause(); + } + // Should be unreachable. + return EXIT_SUCCESS; } -- cgit v1.2.3