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Diffstat (limited to 'toolkit/xre/nsUpdateDriver.cpp')
| -rw-r--r-- | toolkit/xre/nsUpdateDriver.cpp | 1025 |
1 files changed, 1025 insertions, 0 deletions
diff --git a/toolkit/xre/nsUpdateDriver.cpp b/toolkit/xre/nsUpdateDriver.cpp new file mode 100644 index 0000000000..268b3cfbf2 --- /dev/null +++ b/toolkit/xre/nsUpdateDriver.cpp @@ -0,0 +1,1025 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim:set ts=2 sw=2 sts=2 et cindent: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include <stdlib.h> +#include <stdio.h> +#include "nsUpdateDriver.h" + +#include "nsDebug.h" +#include "nsXULAppAPI.h" +#include "nsAppRunner.h" +#include "nsIFile.h" +#include "nsVariant.h" +#include "nsCOMPtr.h" +#include "nsString.h" +#include "prproces.h" +#include "mozilla/Logging.h" +#include "prenv.h" +#include "nsVersionComparator.h" +#include "nsDirectoryServiceDefs.h" +#include "nsThreadUtils.h" +#include "nsIXULAppInfo.h" +#include "mozilla/Preferences.h" +#include "nsPrintfCString.h" +#include "mozilla/DebugOnly.h" +#include "mozilla/ErrorNames.h" +#include "mozilla/Printf.h" +#include "mozilla/UniquePtr.h" +#include "nsIObserverService.h" +#include "nsNetCID.h" +#include "mozilla/ScopeExit.h" +#include "mozilla/Services.h" +#include "mozilla/dom/Promise.h" +#include "mozilla/CmdLineAndEnvUtils.h" + +#ifdef XP_MACOSX +# include "nsILocalFileMac.h" +# include "nsCommandLineServiceMac.h" +# include "MacLaunchHelper.h" +# include "updaterfileutils_osx.h" +# include "mozilla/Monitor.h" +# include "gfxPlatformMac.h" +#endif + +#if defined(XP_WIN) +# include <direct.h> +# include <process.h> +# include <windows.h> +# include <shlwapi.h> +# include <strsafe.h> +# include <shellapi.h> +# include "commonupdatedir.h" +# include "nsWindowsHelpers.h" +# include "pathhash.h" +# include "WinUtils.h" +# define getcwd(path, size) _getcwd(path, size) +# define getpid() GetCurrentProcessId() +#elif defined(XP_UNIX) +# include <unistd.h> +# include <sys/wait.h> +#endif + +using namespace mozilla; + +static LazyLogModule sUpdateLog("updatedriver"); +// Some other file in our unified batch might have defined LOG already. +#ifdef LOG +# undef LOG +#endif +#define LOG(args) MOZ_LOG(sUpdateLog, mozilla::LogLevel::Debug, args) + +static nsresult GetCurrentWorkingDir(nsACString& aOutPath) { + // Cannot use NS_GetSpecialDirectory because XPCOM is not yet initialized. + // This code is duplicated from xpcom/io/SpecialSystemDirectory.cpp: + + aOutPath.Truncate(); + +#if defined(XP_WIN) + wchar_t wpath[MAX_PATH]; + if (!_wgetcwd(wpath, ArrayLength(wpath))) { + return NS_ERROR_FAILURE; + } + CopyUTF16toUTF8(nsDependentString(wpath), aOutPath); +#else + char path[MAXPATHLEN]; + if (!getcwd(path, ArrayLength(path))) { + return NS_ERROR_FAILURE; + } + aOutPath = path; +#endif + + return NS_OK; +} + +/** + * Get the path to the installation directory. For Mac OS X this will be the + * bundle directory. + * + * @param appDir the application directory file object + * @param installDirPath the path to the installation directory + */ +static nsresult GetInstallDirPath(nsIFile* appDir, nsACString& installDirPath) { + nsresult rv; +#ifdef XP_MACOSX + nsCOMPtr<nsIFile> parentDir1, parentDir2; + rv = appDir->GetParent(getter_AddRefs(parentDir1)); + NS_ENSURE_SUCCESS(rv, rv); + rv = parentDir1->GetParent(getter_AddRefs(parentDir2)); + NS_ENSURE_SUCCESS(rv, rv); + rv = parentDir2->GetNativePath(installDirPath); + NS_ENSURE_SUCCESS(rv, rv); +#elif XP_WIN + nsAutoString installDirPathW; + rv = appDir->GetPath(installDirPathW); + NS_ENSURE_SUCCESS(rv, rv); + CopyUTF16toUTF8(installDirPathW, installDirPath); +#else + rv = appDir->GetNativePath(installDirPath); + NS_ENSURE_SUCCESS(rv, rv); +#endif + return NS_OK; +} + +static bool GetFile(nsIFile* dir, const nsACString& name, + nsCOMPtr<nsIFile>& result) { + nsresult rv; + + nsCOMPtr<nsIFile> file; + rv = dir->Clone(getter_AddRefs(file)); + if (NS_FAILED(rv)) { + return false; + } + + rv = file->AppendNative(name); + if (NS_FAILED(rv)) { + return false; + } + + result = file; + return true; +} + +static bool GetStatusFile(nsIFile* dir, nsCOMPtr<nsIFile>& result) { + return GetFile(dir, "update.status"_ns, result); +} + +/** + * Get the contents of the update.status file when the update.status file can + * be opened with read and write access. The reason it is opened for both read + * and write is to prevent trying to update when the user doesn't have write + * access to the update directory. + * + * @param statusFile the status file object. + * @param buf the buffer holding the file contents + * + * @return true if successful, false otherwise. + */ +template <size_t Size> +static bool GetStatusFileContents(nsIFile* statusFile, char (&buf)[Size]) { + static_assert( + Size > 16, + "Buffer needs to be large enough to hold the known status codes"); + + PRFileDesc* fd = nullptr; + nsresult rv = statusFile->OpenNSPRFileDesc(PR_RDWR, 0660, &fd); + if (NS_FAILED(rv)) { + return false; + } + + const int32_t n = PR_Read(fd, buf, Size); + PR_Close(fd); + + return (n >= 0); +} + +enum UpdateStatus { + eNoUpdateAction, + ePendingUpdate, + ePendingService, + ePendingElevate, + eAppliedUpdate, + eAppliedService, +}; + +/** + * Returns a value indicating what needs to be done in order to handle an + * update. + * + * @param dir the directory in which we should look for an update.status file. + * @param statusFile the update.status file found in the directory. + * + * @return the update action to be performed. + */ +static UpdateStatus GetUpdateStatus(nsIFile* dir, + nsCOMPtr<nsIFile>& statusFile) { + if (GetStatusFile(dir, statusFile)) { + char buf[32]; + if (GetStatusFileContents(statusFile, buf)) { + const char kPending[] = "pending"; + const char kPendingService[] = "pending-service"; + const char kPendingElevate[] = "pending-elevate"; + const char kApplied[] = "applied"; + const char kAppliedService[] = "applied-service"; + if (!strncmp(buf, kPendingElevate, sizeof(kPendingElevate) - 1)) { + return ePendingElevate; + } + if (!strncmp(buf, kPendingService, sizeof(kPendingService) - 1)) { + return ePendingService; + } + if (!strncmp(buf, kPending, sizeof(kPending) - 1)) { + return ePendingUpdate; + } + if (!strncmp(buf, kAppliedService, sizeof(kAppliedService) - 1)) { + return eAppliedService; + } + if (!strncmp(buf, kApplied, sizeof(kApplied) - 1)) { + return eAppliedUpdate; + } + } + } + return eNoUpdateAction; +} + +static bool GetVersionFile(nsIFile* dir, nsCOMPtr<nsIFile>& result) { + return GetFile(dir, "update.version"_ns, result); +} + +// Compares the current application version with the update's application +// version. +static bool IsOlderVersion(nsIFile* versionFile, const char* appVersion) { + PRFileDesc* fd = nullptr; + nsresult rv = versionFile->OpenNSPRFileDesc(PR_RDONLY, 0660, &fd); + if (NS_FAILED(rv)) { + return true; + } + + char buf[32]; + const int32_t n = PR_Read(fd, buf, sizeof(buf)); + PR_Close(fd); + + if (n < 0) { + return false; + } + + // Trim off the trailing newline + if (buf[n - 1] == '\n') { + buf[n - 1] = '\0'; + } + + // If the update xml doesn't provide the application version the file will + // contain the string "null" and it is assumed that the update is not older. + const char kNull[] = "null"; + if (strncmp(buf, kNull, sizeof(kNull) - 1) == 0) { + return false; + } + + return mozilla::Version(appVersion) > buf; +} + +/** + * Applies, switches, or stages an update. + * + * @param greDir the GRE directory + * @param updateDir the update root directory + * @param appDir the application directory + * @param appArgc the number of args passed to the application + * @param appArgv the args passed to the application + * (used for restarting the application when necessary) + * @param restart true when a restart is necessary. + * @param isStaged true when the update has already been staged + * @param outpid (out) parameter holding the handle to the updater application + * when staging updates + */ +static void ApplyUpdate(nsIFile* greDir, nsIFile* updateDir, nsIFile* appDir, + int appArgc, char** appArgv, bool restart, + bool isStaged, ProcessType* outpid) { + MOZ_DIAGNOSTIC_ASSERT( + !restart || NS_IsMainThread(), + "restart may only be set when called on the main thread"); + // The following determines the update operation to perform. + // 1. When restart is false the update will be staged. + // 2. When restart is true and isStaged is false the update will apply the mar + // file to the installation directory. + // 3. When restart is true and isStaged is true the update will switch the + // staged update with the installation directory. + + nsresult rv; + + nsCOMPtr<nsIFile> updater; + nsAutoCString updaterPath; + nsAutoCString updateDirPath; +#if defined(XP_WIN) + // Get an nsIFile reference for the updater in the installation dir. + if (!GetFile(greDir, nsLiteralCString(UPDATER_BIN), updater)) { + return; + } + + // Get the path to the updater. + nsAutoString updaterPathW; + rv = updater->GetPath(updaterPathW); + if (NS_FAILED(rv)) { + return; + } + CopyUTF16toUTF8(updaterPathW, updaterPath); + + // Get the path to the update dir. + nsAutoString updateDirPathW; + rv = updateDir->GetPath(updateDirPathW); + if (NS_FAILED(rv)) { + return; + } + CopyUTF16toUTF8(updateDirPathW, updateDirPath); +#elif defined(XP_MACOSX) + // Get an nsIFile reference for the updater in the installation dir. + if (!GetFile(appDir, nsLiteralCString(UPDATER_APP), updater)) { + return; + } + rv = updater->AppendNative("Contents"_ns); + if (NS_FAILED(rv)) { + return; + } + rv = updater->AppendNative("MacOS"_ns); + if (NS_FAILED(rv)) { + return; + } + rv = updater->AppendNative(nsLiteralCString(UPDATER_BIN)); + if (NS_FAILED(rv)) { + return; + } + + // Get the path to the updater. + rv = updater->GetNativePath(updaterPath); + if (NS_FAILED(rv)) { + return; + } + + // Get the path to the update dir. + rv = updateDir->GetNativePath(updateDirPath); + if (NS_FAILED(rv)) { + return; + } +#else + // Get an nsIFile reference for the updater in the installation dir. + if (!GetFile(greDir, nsLiteralCString(UPDATER_BIN), updater)) { + return; + } + + // Get the path to the updater. + rv = updater->GetNativePath(updaterPath); + if (NS_FAILED(rv)) { + return; + } + + // Get the path to the update dir. + rv = updateDir->GetNativePath(updateDirPath); + if (NS_FAILED(rv)) { + return; + } +#endif + + // appFilePath and workingDirPath are only used when the application will be + // restarted. + nsAutoCString appFilePath; + nsAutoCString workingDirPath; + if (restart) { + // Get the path to the current working directory. + rv = GetCurrentWorkingDir(workingDirPath); + if (NS_FAILED(rv)) { + return; + } + + // Get the application file path used by the updater to restart the + // application after the update has finished. + nsCOMPtr<nsIFile> appFile; + XRE_GetBinaryPath(getter_AddRefs(appFile)); + if (!appFile) { + return; + } + +#if defined(XP_WIN) + nsAutoString appFilePathW; + rv = appFile->GetPath(appFilePathW); + if (NS_FAILED(rv)) { + return; + } + CopyUTF16toUTF8(appFilePathW, appFilePath); +#else + rv = appFile->GetNativePath(appFilePath); + if (NS_FAILED(rv)) { + return; + } +#endif + } + + // Get the installation directory path. + nsAutoCString installDirPath; + rv = GetInstallDirPath(appDir, installDirPath); + if (NS_FAILED(rv)) { + return; + } + +#if defined(XP_MACOSX) + // If we're going to do a restart, we need to make sure the font registration + // thread has finished before this process exits (bug 1777332). + if (restart) { + gfxPlatformMac::WaitForFontRegistration(); + } + + // We need to detect whether elevation is required for this update. This can + // occur when an admin user installs the application, but another admin + // user attempts to update (see bug 394984). + // We only check if we need elevation if we are restarting. We don't attempt + // to stage if elevation is required. Staging happens without the user knowing + // about it, and we don't want to ask for elevation for seemingly no reason. + bool needElevation = false; + if (restart) { + needElevation = !IsRecursivelyWritable(installDirPath.get()); + if (needElevation) { + // Normally we would check this via nsIAppStartup::wasSilentlyStarted, + // but nsIAppStartup isn't available yet. + char* mozAppSilentStart = PR_GetEnv("MOZ_APP_SILENT_START"); + bool wasSilentlyStarted = + mozAppSilentStart && (strcmp(mozAppSilentStart, "") != 0); + if (wasSilentlyStarted) { + // Elevation always requires prompting for credentials on macOS. If we + // are trying to restart silently, we must not display UI such as this + // prompt. + // We make this check here rather than in the updater, because it is + // actually Firefox that shows the elevation prompt (via + // InstallPrivilegedHelper), not the updater. + return; + } + } + } +#endif + + nsAutoCString applyToDirPath; + nsCOMPtr<nsIFile> updatedDir; + if (restart && !isStaged) { + // The install directory is the same as the apply to directory. + applyToDirPath.Assign(installDirPath); + } else { + // Get the directory where the update is staged or will be staged. This is + // `updateDir` for macOS and `appDir` for all other platforms. macOS cannot + // stage updates inside the .app bundle (`appDir`) without breaking the code + // signature on the bundle, so we use `updateDir` instead. +#if defined(XP_MACOSX) + if (!GetFile(updateDir, "Updated.app"_ns, updatedDir)) { +#else + if (!GetFile(appDir, "updated"_ns, updatedDir)) { +#endif + return; + } +#if defined(XP_WIN) + nsAutoString applyToDirPathW; + rv = updatedDir->GetPath(applyToDirPathW); + if (NS_FAILED(rv)) { + return; + } + CopyUTF16toUTF8(applyToDirPathW, applyToDirPath); +#else + rv = updatedDir->GetNativePath(applyToDirPath); +#endif + } + if (NS_FAILED(rv)) { + return; + } + + if (restart && isStaged) { + // When the update should already be staged make sure that the updated + // directory exists. + bool updatedDirExists = false; + if (NS_FAILED(updatedDir->Exists(&updatedDirExists)) || !updatedDirExists) { + return; + } + } + + // On platforms where we are not calling execv, we may need to make the + // updater executable wait for the calling process to exit. Otherwise, the + // updater may have trouble modifying our executable image (because it might + // still be in use). This is accomplished by passing our PID to the updater + // so that it can wait for us to exit. This is not perfect as there is a race + // condition that could bite us. It's possible that the calling process could + // exit before the updater waits on the specified PID, and in the meantime a + // new process with the same PID could be created. This situation is + // unlikely, however, given the way most operating systems recycle PIDs. We'll + // take our chances ;-) Construct the PID argument for this process to pass to + // the updater. + nsAutoCString pid; + if (restart) { +#if defined(XP_UNIX) & !defined(XP_MACOSX) + // When execv is used for an update that requires a restart 0 is passed + // which is ignored by the updater. + pid.AssignLiteral("0"); +#else + pid.AppendInt((int32_t)getpid()); +#endif + if (isStaged) { + // Append a special token to the PID in order to inform the updater that + // it should replace install with the updated directory. + pid.AppendLiteral("/replace"); + } + } else { + // Signal the updater application that it should stage the update. + pid.AssignLiteral("-1"); + } + + int argc = 5; + if (restart) { + argc = appArgc + 6; + if (gRestartedByOS) { + argc += 1; + } + } + char** argv = static_cast<char**>(malloc((argc + 1) * sizeof(char*))); + if (!argv) { + return; + } + argv[0] = (char*)updaterPath.get(); + argv[1] = (char*)updateDirPath.get(); + argv[2] = (char*)installDirPath.get(); + argv[3] = (char*)applyToDirPath.get(); + argv[4] = (char*)pid.get(); + if (restart && appArgc) { + argv[5] = (char*)workingDirPath.get(); + argv[6] = (char*)appFilePath.get(); + for (int i = 1; i < appArgc; ++i) { + argv[6 + i] = appArgv[i]; + } + if (gRestartedByOS) { + // We haven't truly started up, restore this argument so that we will have + // it upon restart. + argv[6 + appArgc] = const_cast<char*>("-os-restarted"); + } + } + argv[argc] = nullptr; + + if (restart && gSafeMode) { + PR_SetEnv("MOZ_SAFE_MODE_RESTART=1"); + } + + LOG(("spawning updater process [%s]\n", updaterPath.get())); + +#if defined(XP_UNIX) && !defined(XP_MACOSX) + // We use execv to spawn the updater process on all UNIX systems except Mac + // OSX since it is known to cause problems on the Mac. Windows has execv, but + // it is a faked implementation that doesn't really replace the current + // process. Instead it spawns a new process, so we gain nothing from using + // execv on Windows. + if (restart) { + int execResult = execv(updaterPath.get(), argv); + free(argv); + exit(execResult); + } + *outpid = fork(); + if (*outpid == -1) { + free(argv); + return; + } + if (*outpid == 0) { + int execResult = execv(updaterPath.get(), argv); + free(argv); + exit(execResult); + } +#elif defined(XP_WIN) + if (isStaged) { + // Launch the updater to replace the installation with the staged updated. + if (!WinLaunchChild(updaterPathW.get(), argc, argv)) { + free(argv); + return; + } + } else { + // Launch the updater to either stage or apply an update. + if (!WinLaunchChild(updaterPathW.get(), argc, argv, nullptr, outpid)) { + free(argv); + return; + } + } +#elif defined(XP_MACOSX) +if (restart) { + // Ensure we've added URLs to load into the app command line if we're + // restarting. + CommandLineServiceMac::SetupMacCommandLine(argc, argv, restart); + + if (needElevation) { + bool hasLaunched = LaunchElevatedUpdate(argc, argv, outpid); + free(argv); + if (!hasLaunched) { + LOG(("Failed to launch elevated update!")); + exit(1); + } + exit(0); + } +} + +if (isStaged) { + // Launch the updater to replace the installation with the staged updated. + LaunchChildMac(argc, argv); +} else { + // Launch the updater to either stage or apply an update. + LaunchChildMac(argc, argv, outpid); +} +#else +if (isStaged) { + // Launch the updater to replace the installation with the staged updated. + PR_CreateProcessDetached(updaterPath.get(), argv, nullptr, nullptr); +} else { + // Launch the updater to either stage or apply an update. + *outpid = PR_CreateProcess(updaterPath.get(), argv, nullptr, nullptr); +} +#endif + free(argv); + if (restart) { + exit(0); + } +} + +#if !defined(XP_WIN) +/** + * Wait briefly to see if a process terminates, then return true if it has. + * + * (Not implemented on Windows, where HandleWatcher is used instead.) + */ +static bool ProcessHasTerminated(ProcessType pt) { +# if defined(XP_MACOSX) + // We're waiting for the process to terminate in LaunchChildMac. + return true; +# elif defined(XP_UNIX) + int exitStatus; + pid_t exited = waitpid(pt, &exitStatus, WNOHANG); + if (exited == 0) { + // Process is still running. + sleep(1); + return false; + } + if (exited == -1) { + LOG(("Error while checking if the updater process is finished")); + // This shouldn't happen, but if it does, the updater process is lost to us, + // so the best we can do is pretend that it's exited. + return true; + } + // If we get here, the process has exited; make sure it exited normally. + if (WIFEXITED(exitStatus) && (WEXITSTATUS(exitStatus) != 0)) { + LOG(("Error while running the updater process, check update.log")); + } + return true; +# else + // No way to have a non-blocking implementation on these platforms, + // because we're using NSPR and it only provides a blocking wait. + int32_t exitCode; + PR_WaitProcess(pt, &exitCode); + if (exitCode != 0) { + LOG(("Error while running the updater process, check update.log")); + } + return true; +# endif +} +#endif + +nsresult ProcessUpdates(nsIFile* greDir, nsIFile* appDir, nsIFile* updRootDir, + int argc, char** argv, const char* appVersion, + bool restart, ProcessType* pid) { + nsresult rv; + +#ifdef XP_WIN + // If we're in a package, we know any updates that we find are not for us. + if (mozilla::widget::WinUtils::HasPackageIdentity()) { + return NS_OK; + } +#endif + + nsCOMPtr<nsIFile> updatesDir; + rv = updRootDir->Clone(getter_AddRefs(updatesDir)); + NS_ENSURE_SUCCESS(rv, rv); + rv = updatesDir->AppendNative("updates"_ns); + NS_ENSURE_SUCCESS(rv, rv); + rv = updatesDir->AppendNative("0"_ns); + NS_ENSURE_SUCCESS(rv, rv); + + // Return early since there isn't a valid update when the update application + // version file doesn't exist or if the update's application version is less + // than the current application version. The cleanup of the update will happen + // during post update processing in nsUpdateService.js. + nsCOMPtr<nsIFile> versionFile; + if (!GetVersionFile(updatesDir, versionFile) || + IsOlderVersion(versionFile, appVersion)) { + return NS_OK; + } + + nsCOMPtr<nsIFile> statusFile; + UpdateStatus status = GetUpdateStatus(updatesDir, statusFile); + switch (status) { + case ePendingUpdate: + case ePendingService: { + ApplyUpdate(greDir, updatesDir, appDir, argc, argv, restart, false, pid); + break; + } + case eAppliedUpdate: + case eAppliedService: + // An update was staged and needs to be switched so the updated + // application is used. + ApplyUpdate(greDir, updatesDir, appDir, argc, argv, restart, true, pid); + break; + case ePendingElevate: + // No action should be performed since the user hasn't opted into + // elevating for the update so continue application startup. + case eNoUpdateAction: + // We don't need to do any special processing here, we'll just continue to + // startup the application. + break; + } + + return NS_OK; +} + +NS_IMPL_ISUPPORTS(nsUpdateProcessor, nsIUpdateProcessor) + +nsUpdateProcessor::nsUpdateProcessor() : mUpdaterPID(0) {} + +#ifdef XP_WIN +nsUpdateProcessor::~nsUpdateProcessor() { mProcessWatcher.Stop(); } +#else +nsUpdateProcessor::~nsUpdateProcessor() = default; +#endif + +NS_IMETHODIMP +nsUpdateProcessor::ProcessUpdate() { + nsresult rv; + + nsCOMPtr<nsIProperties> ds = + do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID, &rv); + NS_ENSURE_SUCCESS(rv, rv); + + nsCOMPtr<nsIFile> exeFile; + rv = ds->Get(XRE_EXECUTABLE_FILE, NS_GET_IID(nsIFile), + getter_AddRefs(exeFile)); + NS_ENSURE_SUCCESS(rv, rv); + + nsCOMPtr<nsIFile> appDir; + rv = exeFile->GetParent(getter_AddRefs(appDir)); + NS_ENSURE_SUCCESS(rv, rv); + + nsCOMPtr<nsIFile> greDir; + rv = ds->Get(NS_GRE_DIR, NS_GET_IID(nsIFile), getter_AddRefs(greDir)); + NS_ENSURE_SUCCESS(rv, rv); + + nsCOMPtr<nsIFile> updRoot; + rv = ds->Get(XRE_UPDATE_ROOT_DIR, NS_GET_IID(nsIFile), + getter_AddRefs(updRoot)); + NS_ASSERTION(NS_SUCCEEDED(rv), "Can't get the UpdRootD dir"); + + // XRE_UPDATE_ROOT_DIR should not fail but if it does fallback to the + // application directory just to be safe. + if (NS_FAILED(rv)) { + rv = appDir->Clone(getter_AddRefs(updRoot)); + NS_ENSURE_SUCCESS(rv, rv); + } + + nsCOMPtr<nsIXULAppInfo> appInfo = + do_GetService("@mozilla.org/xre/app-info;1", &rv); + NS_ENSURE_SUCCESS(rv, rv); + + nsAutoCString appVersion; + rv = appInfo->GetVersion(appVersion); + NS_ENSURE_SUCCESS(rv, rv); + + // Copy the parameters to the StagedUpdateInfo structure shared with the + // worker thread. + mInfo.mGREDir = greDir; + mInfo.mAppDir = appDir; + mInfo.mUpdateRoot = updRoot; + mInfo.mArgc = 0; + mInfo.mArgv = nullptr; + mInfo.mAppVersion = appVersion; + + MOZ_ASSERT(NS_IsMainThread(), "not main thread"); + nsCOMPtr<nsIRunnable> r = + NewRunnableMethod("nsUpdateProcessor::StartStagedUpdate", this, + &nsUpdateProcessor::StartStagedUpdate); + return NS_NewNamedThread("UpdateProcessor", getter_AddRefs(mWorkerThread), r); +} + +void nsUpdateProcessor::StartStagedUpdate() { + MOZ_ASSERT(!NS_IsMainThread(), "main thread"); + + // If we fail to launch the updater process or its monitor for some reason, we + // need to shut down the worker thread, as there isn't anything more for us to + // do. + auto onExitStopThread = mozilla::MakeScopeExit([&] { + nsresult rv = NS_DispatchToMainThread( + NewRunnableMethod("nsUpdateProcessor::ShutdownWorkerThread", this, + &nsUpdateProcessor::ShutdownWorkerThread)); + NS_ENSURE_SUCCESS_VOID(rv); + }); + + // Launch updater. (We do this on a worker thread to avoid blocking the main + // thread with file I/O.) + nsresult rv = ProcessUpdates(mInfo.mGREDir, mInfo.mAppDir, mInfo.mUpdateRoot, + mInfo.mArgc, mInfo.mArgv, + mInfo.mAppVersion.get(), false, &mUpdaterPID); + if (NS_FAILED(rv)) { + MOZ_LOG(sUpdateLog, mozilla::LogLevel::Error, + ("could not start updater process: %s", GetStaticErrorName(rv))); + return; + } + + if (!mUpdaterPID) { + // not an error + MOZ_LOG(sUpdateLog, mozilla::LogLevel::Verbose, + ("ProcessUpdates() indicated nothing to do")); + return; + } + +#ifdef WIN32 + // Set up a HandleWatcher to report to the main thread when we're done. + RefPtr<nsIThread> mainThread; + NS_GetMainThread(getter_AddRefs(mainThread)); + mProcessWatcher.Watch(mUpdaterPID, mainThread, + NewRunnableMethod("nsUpdateProcessor::UpdateDone", this, + &nsUpdateProcessor::UpdateDone)); + +// On Windows, that's all we need the worker thread for. Let +// `onExitStopThread` shut us down. +#else + // Monitor the state of the updater process while it is staging an update. + rv = NS_DispatchToCurrentThread( + NewRunnableMethod("nsUpdateProcessor::WaitForProcess", this, + &nsUpdateProcessor::WaitForProcess)); + if (NS_FAILED(rv)) { + MOZ_LOG(sUpdateLog, mozilla::LogLevel::Error, + ("could not start updater process poll: error %s", + GetStaticErrorName(rv))); + return; + } + + // Leave the worker thread alive to run WaitForProcess. Either it or its + // successors will be responsible for shutting down the worker thread. + onExitStopThread.release(); +#endif +} + +void nsUpdateProcessor::ShutdownWorkerThread() { + MOZ_ASSERT(NS_IsMainThread(), "not main thread"); + mWorkerThread->Shutdown(); + mWorkerThread = nullptr; +} + +#ifndef WIN32 +void nsUpdateProcessor::WaitForProcess() { + MOZ_ASSERT(!NS_IsMainThread(), "main thread"); + if (ProcessHasTerminated(mUpdaterPID)) { + NS_DispatchToMainThread(NewRunnableMethod( + "nsUpdateProcessor::UpdateDone", this, &nsUpdateProcessor::UpdateDone)); + } else { + NS_DispatchToCurrentThread( + NewRunnableMethod("nsUpdateProcessor::WaitForProcess", this, + &nsUpdateProcessor::WaitForProcess)); + } +} +#endif + +void nsUpdateProcessor::UpdateDone() { + MOZ_ASSERT(NS_IsMainThread(), "not main thread"); + + nsCOMPtr<nsIUpdateManager> um = + do_GetService("@mozilla.org/updates/update-manager;1"); + if (um) { + // This completes asynchronously, but nothing else that we are doing in this + // function requires waiting for this to complete. + RefPtr<mozilla::dom::Promise> outPromise; + um->RefreshUpdateStatus(getter_AddRefs(outPromise)); + } + +// On Windows, shutting down the worker thread is taken care of by another task. +// (Which may not have run yet, so we can't assert.) +#ifndef XP_WIN + ShutdownWorkerThread(); +#endif +} + +NS_IMETHODIMP +nsUpdateProcessor::GetServiceRegKeyExists(bool* aResult) { +#ifndef XP_WIN + return NS_ERROR_NOT_IMPLEMENTED; +#else // #ifdef XP_WIN + nsCOMPtr<nsIProperties> dirSvc( + do_GetService("@mozilla.org/file/directory_service;1")); + NS_ENSURE_TRUE(dirSvc, NS_ERROR_SERVICE_NOT_AVAILABLE); + + nsCOMPtr<nsIFile> installBin; + nsresult rv = dirSvc->Get(XRE_EXECUTABLE_FILE, NS_GET_IID(nsIFile), + getter_AddRefs(installBin)); + NS_ENSURE_SUCCESS(rv, rv); + + nsCOMPtr<nsIFile> installDir; + rv = installBin->GetParent(getter_AddRefs(installDir)); + NS_ENSURE_SUCCESS(rv, rv); + + nsAutoString installPath; + rv = installDir->GetPath(installPath); + NS_ENSURE_SUCCESS(rv, rv); + + wchar_t maintenanceServiceKey[MAX_PATH + 1]; + BOOL success = CalculateRegistryPathFromFilePath( + PromiseFlatString(installPath).get(), maintenanceServiceKey); + NS_ENSURE_TRUE(success, NS_ERROR_FAILURE); + + HKEY regHandle; + LSTATUS ls = RegOpenKeyExW(HKEY_LOCAL_MACHINE, maintenanceServiceKey, 0, + KEY_QUERY_VALUE | KEY_WOW64_64KEY, ®Handle); + if (ls == ERROR_SUCCESS) { + RegCloseKey(regHandle); + *aResult = true; + return NS_OK; + } + if (ls == ERROR_FILE_NOT_FOUND) { + *aResult = false; + return NS_OK; + } + // We got an error we weren't expecting reading the registry. + return NS_ERROR_NOT_AVAILABLE; +#endif // #ifdef XP_WIN +} + +NS_IMETHODIMP +nsUpdateProcessor::AttemptAutomaticApplicationRestartWithLaunchArgs( + const nsTArray<nsString>& argvExtra, int32_t* pidRet) { +#ifndef XP_WIN + return NS_ERROR_NOT_IMPLEMENTED; +#else + // Retrieve current command line arguments for restart + // GetCommandLineW() returns a read only pointer to + // the arguments the process was launched with. + LPWSTR currentCommandLine = GetCommandLineW(); + + // Spawn a new process for the application based on the current + // command line with the -restart-pid <pid> flag. This flag + // can be used with MaybeWaitForProcessExit() to have + // the process wait until the parent process has exited. + if (currentCommandLine) { + // Append additional command line arguments to current command line for + // restart. + int currentArgc = 0; + UniquePtr<LPWSTR, LocalFreeDeleter> currentArgv( + CommandLineToArgvW(currentCommandLine, ¤tArgc)); + nsTArray<wchar_t*> restartCommandLineArgv(currentArgc + argvExtra.Length() + + 2); + for (int i = 0; i < currentArgc; i++) { + restartCommandLineArgv.AppendElement(currentArgv.get()[i]); + } + for (const nsString& arg : argvExtra) { + restartCommandLineArgv.AppendElement(static_cast<wchar_t*>(arg.get())); + } + // Append -restart-pid flag and pid to restart command line. + DWORD pidCurrent = GetCurrentProcessId(); + nsString pid; + pid.AppendInt(static_cast<uint32_t>(pidCurrent)); + nsString pidFlag = u"-restart-pid"_ns; + restartCommandLineArgv.AppendElement(pidFlag.get()); + restartCommandLineArgv.AppendElement(pid.get()); + + // Create new process that interacts with MaybeWaitForProcessExit() + // and sleeps until the original process is killed. + wchar_t exeName[MAX_PATH]; + GetModuleFileNameW(NULL, exeName, MAX_PATH); + HANDLE childHandle; + WinLaunchChild(exeName, restartCommandLineArgv.Length(), + restartCommandLineArgv.Elements(), nullptr, &childHandle); + *pidRet = GetProcessId(childHandle); + CloseHandle(childHandle); + if (!*pidRet) { + printf_stderr("*** ApplyUpdate: !pidRet ***\n"); + return NS_ERROR_ABORT; + } + printf_stderr("*** ApplyUpdate: launched pidRet = %d ***\n", *pidRet); + + MOZ_LOG(sUpdateLog, mozilla::LogLevel::Debug, + ("register application restart succeeded")); + } else { + MOZ_LOG(sUpdateLog, mozilla::LogLevel::Error, + ("could not register application restart")); + return NS_ERROR_NOT_AVAILABLE; + } + return NS_OK; +#endif // #ifndef XP_WIN +} + +NS_IMETHODIMP +nsUpdateProcessor::WaitForProcessExit(uint32_t pid, uint32_t timeoutMS) { +#ifndef XP_WIN + return NS_ERROR_NOT_IMPLEMENTED; +#else + + nsAutoHandle hProcess(OpenProcess(SYNCHRONIZE, FALSE, pid)); + if (!hProcess) { + // It's possible the pid is incorrect, or the process has exited. + // This isn't necessarily a failure state as if the process has + // already exited then that is the desired behavior. + MOZ_LOG(sUpdateLog, mozilla::LogLevel::Warning, + ("WaitForProcessExit(%d): failed to OpenProcess", pid)); + return NS_OK; + } + + // Wait up to timeoutMS milliseconds for termination. + DWORD waitRv = WaitForSingleObjectEx(hProcess, timeoutMS, FALSE); + if (waitRv != WAIT_OBJECT_0) { + if (waitRv == WAIT_TIMEOUT) { + MOZ_LOG( + sUpdateLog, mozilla::LogLevel::Debug, + ("WaitForProcessExit(%d): timed out after %d MS", pid, timeoutMS)); + return NS_ERROR_ABORT; + } + + MOZ_LOG(sUpdateLog, mozilla::LogLevel::Warning, + ("WaitForProcessExit(%d): unexpected error %lx", pid, waitRv)); + return NS_ERROR_FAILURE; + } + + MOZ_LOG(sUpdateLog, mozilla::LogLevel::Debug, + ("WaitForProcessExit(%d): success", pid)); + return NS_OK; +#endif // XP_WIN +} |