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gecko-dev/toolkit/xre/nsUpdateDriver.cpp

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/* -*- 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 "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/Printf.h"
#include "mozilla/UniquePtr.h"
#include "nsIObserverService.h"
#include "nsNetCID.h"
#include "mozilla/Services.h"
#ifdef XP_MACOSX
# include "nsILocalFileMac.h"
# include "nsCommandLineServiceMac.h"
# include "MacLaunchHelper.h"
# include "updaterfileutils_osx.h"
# include "mozilla/Monitor.h"
#endif
#if defined(XP_WIN)
# include <direct.h>
# include <process.h>
# include <windows.h>
# include <shlwapi.h>
# include <strsafe.h>
# include "commonupdatedir.h"
# include "nsWindowsHelpers.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)
#ifdef XP_WIN
# define UPDATER_BIN "updater.exe"
# define MAINTENANCE_SVC_NAME L"MozillaMaintenance"
#elif XP_MACOSX
# define UPDATER_APP "updater.app"
# define UPDATER_BIN "org.mozilla.updater"
#else
# define UPDATER_BIN "updater"
#endif
#ifdef XP_MACOSX
static void UpdateDriverSetupMacCommandLine(int& argc, char**& argv,
bool restart) {
if (NS_IsMainThread()) {
CommandLineServiceMac::SetupMacCommandLine(argc, argv, restart);
return;
}
// Bug 1335916: SetupMacCommandLine calls a CoreFoundation function that
// asserts that it was called from the main thread, so if we are not the main
// thread, we have to dispatch that call to there. But we also have to get the
// result from it, so we can't just dispatch and return, we have to wait
// until the dispatched operation actually completes. So we also set up a
// monitor to signal us when that happens, and block until then.
Monitor monitor("nsUpdateDriver SetupMacCommandLine");
nsresult rv = NS_DispatchToMainThread(NS_NewRunnableFunction(
"UpdateDriverSetupMacCommandLine",
[&argc, &argv, restart, &monitor]() -> void {
CommandLineServiceMac::SetupMacCommandLine(argc, argv, restart);
MonitorAutoLock(monitor).Notify();
}));
if (NS_FAILED(rv)) {
LOG(
("Update driver error dispatching SetupMacCommandLine to main thread: "
"%d\n",
rv));
return;
}
// The length of this wait is arbitrary, but should be long enough that having
// it expire means something is seriously wrong.
CVStatus status =
MonitorAutoLock(monitor).Wait(TimeDuration::FromSeconds(60));
if (status == CVStatus::Timeout) {
LOG(("Update driver timed out waiting for SetupMacCommandLine\n"));
}
}
#endif
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);
}
typedef enum {
eNoUpdateAction,
ePendingUpdate,
ePendingService,
ePendingElevate,
eAppliedUpdate,
eAppliedService,
} UpdateStatus;
/**
* 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) {
// 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;
}
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.
#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)
UpdateDriverSetupMacCommandLine(argc, argv, restart);
// 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).
if (restart && !IsRecursivelyWritable(installDirPath.get())) {
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);
}
}
/**
* Wait briefly to see if a process terminates, then return true if it has.
*/
static bool ProcessHasTerminated(ProcessType pt) {
#if defined(XP_WIN)
if (WaitForSingleObject(pt, 1000)) {
return false;
}
CloseHandle(pt);
return true;
#elif 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
}
nsresult ProcessUpdates(nsIFile* greDir, nsIFile* appDir, nsIFile* updRootDir,
int argc, char** argv, const char* appVersion,
bool restart, ProcessType* pid) {
nsresult rv;
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) {}
nsUpdateProcessor::~nsUpdateProcessor() = default;
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
// watcher 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("Update Watcher", getter_AddRefs(mProcessWatcher),
r);
}
NS_IMETHODIMP
nsUpdateProcessor::FixUpdateDirectoryPerms(bool aUseServiceOnFailure) {
#ifndef XP_WIN
return NS_ERROR_NOT_IMPLEMENTED;
#else
enum class State {
Initializing,
WaitingToStart,
Starting,
WaitingForFinish,
};
class FixUpdateDirectoryPermsRunnable final : public mozilla::Runnable {
public:
FixUpdateDirectoryPermsRunnable(const char* aName,
bool aUseServiceOnFailure,
const nsAutoString& aInstallPath)
: Runnable(aName),
mState(State::Initializing)
# ifdef MOZ_MAINTENANCE_SERVICE
,
mUseServiceOnFailure(aUseServiceOnFailure)
# endif
{
size_t installPathSize = aInstallPath.Length() + 1;
mInstallPath = mozilla::MakeUnique<wchar_t[]>(installPathSize);
if (mInstallPath) {
HRESULT hrv = StringCchCopyW(mInstallPath.get(), installPathSize,
PromiseFlatString(aInstallPath).get());
if (FAILED(hrv)) {
mInstallPath.reset();
}
}
}
NS_IMETHOD Run() override {
# ifdef MOZ_MAINTENANCE_SERVICE
// These constants control how often and how many times we poll the
// maintenance service to see if it has stopped. If there is no delay in
// the event queue, this works out to 8 minutes of polling.
const unsigned int kMaxQueries = 2400;
const unsigned int kQueryIntervalMS = 200;
// These constants control how often and how many times we attempt to
// start the service. If there is no delay in the event queue, this works
// out to 5 seconds of polling.
const unsigned int kMaxStartAttempts = 50;
const unsigned int kStartAttemptIntervalMS = 100;
# endif
if (mState == State::Initializing) {
if (!mInstallPath) {
LOG(
("Warning: No install path available in "
"FixUpdateDirectoryPermsRunnable\n"));
}
// In the event that the directory is owned by this user, we may be able
// to fix things without the maintenance service
mozilla::UniquePtr<wchar_t[]> updateDir;
HRESULT permResult = GetCommonUpdateDirectory(
mInstallPath.get(), SetPermissionsOf::AllFilesAndDirs, updateDir);
if (SUCCEEDED(permResult)) {
LOG(("Successfully fixed permissions from within Firefox\n"));
return NS_OK;
}
# ifdef MOZ_MAINTENANCE_SERVICE
else if (!mUseServiceOnFailure) {
LOG(
("Error: Unable to fix permissions within Firefox and "
"maintenance service is disabled\n"));
return ReportUpdateError();
}
# else
LOG(("Error: Unable to fix permissions\n"));
return ReportUpdateError();
# endif
# ifdef MOZ_MAINTENANCE_SERVICE
SC_HANDLE serviceManager =
OpenSCManager(nullptr, nullptr,
SC_MANAGER_CONNECT | SC_MANAGER_ENUMERATE_SERVICE);
mServiceManager.own(serviceManager);
if (!serviceManager) {
LOG(
("Error: Unable to get the service manager. Cannot fix "
"permissions.\n"));
return NS_ERROR_FAILURE;
}
SC_HANDLE service = OpenServiceW(serviceManager, MAINTENANCE_SVC_NAME,
SERVICE_QUERY_STATUS | SERVICE_START);
mService.own(service);
if (!service) {
LOG(
("Error: Unable to get the maintenance service. Unable fix "
"permissions without it.\n"));
return NS_ERROR_FAILURE;
}
mStartServiceArgCount = mInstallPath ? 3 : 2;
mStartServiceArgs =
mozilla::MakeUnique<LPCWSTR[]>(mStartServiceArgCount);
if (!mStartServiceArgs) {
LOG(
("Error: Unable to allocate memory for argument pointers. Cannot "
"fix permissions.\n"));
return NS_ERROR_FAILURE;
}
mStartServiceArgs[0] = L"MozillaMaintenance";
mStartServiceArgs[1] = L"fix-update-directory-perms";
if (mInstallPath) {
mStartServiceArgs[2] = mInstallPath.get();
}
mState = State::WaitingToStart;
mCurrentTry = 1;
# endif
}
# ifdef MOZ_MAINTENANCE_SERVICE
if (mState == State::WaitingToStart ||
mState == State::WaitingForFinish) {
SERVICE_STATUS_PROCESS ssp;
DWORD bytesNeeded;
BOOL success =
QueryServiceStatusEx(mService, SC_STATUS_PROCESS_INFO, (LPBYTE)&ssp,
sizeof(SERVICE_STATUS_PROCESS), &bytesNeeded);
if (!success) {
DWORD lastError = GetLastError();
// These 3 errors can occur when the service is not yet stopped but it
// is stopping. If we got another error, waiting will probably not
// help.
if (lastError != ERROR_INVALID_SERVICE_CONTROL &&
lastError != ERROR_SERVICE_CANNOT_ACCEPT_CTRL &&
lastError != ERROR_SERVICE_NOT_ACTIVE) {
LOG(
("Error: Unable to query service when fixing permissions. Got "
"an error that cannot be fixed by waiting: 0x%lx\n",
lastError));
return NS_ERROR_FAILURE;
}
if (mCurrentTry >= kMaxQueries) {
LOG(
("Error: Unable to query service when fixing permissions: "
"Timed out after %u attempts.\n",
mCurrentTry));
return NS_ERROR_FAILURE;
}
return RetryInMS(kQueryIntervalMS);
} else { // We successfully queried the service
if (ssp.dwCurrentState != SERVICE_STOPPED) {
return RetryInMS(kQueryIntervalMS);
}
if (mState == State::WaitingForFinish) {
if (ssp.dwWin32ExitCode != NO_ERROR) {
LOG(
("Error: Maintenance Service was unable to fix update "
"directory permissions\n"));
return ReportUpdateError();
}
LOG(
("Maintenance service successully fixed update directory "
"permissions\n"));
return NS_OK;
}
mState = State::Starting;
mCurrentTry = 1;
}
}
if (mState == State::Starting) {
BOOL success = StartServiceW(mService, mStartServiceArgCount,
mStartServiceArgs.get());
if (success) {
mState = State::WaitingForFinish;
mCurrentTry = 1;
return RetryInMS(kQueryIntervalMS);
} else if (mCurrentTry >= kMaxStartAttempts) {
LOG(
("Error: Unable to fix permissions: Timed out after %u attempts "
"to start the maintenance service\n",
mCurrentTry));
return NS_ERROR_FAILURE;
}
return RetryInMS(kStartAttemptIntervalMS);
}
# endif
// We should not have fallen through all three state checks above
LOG(
("Error: Reached logically unreachable code when correcting update "
"directory permissions\n"));
return NS_ERROR_FAILURE;
}
private:
State mState;
mozilla::UniquePtr<wchar_t[]> mInstallPath;
# ifdef MOZ_MAINTENANCE_SERVICE
bool mUseServiceOnFailure;
unsigned int mCurrentTry;
nsAutoServiceHandle mServiceManager;
nsAutoServiceHandle mService;
DWORD mStartServiceArgCount;
mozilla::UniquePtr<LPCWSTR[]> mStartServiceArgs;
nsresult RetryInMS(unsigned int aDelayMS) {
++mCurrentTry;
nsCOMPtr<nsIRunnable> runnable(this);
return NS_DelayedDispatchToCurrentThread(runnable.forget(), aDelayMS);
}
# endif
nsresult ReportUpdateError() {
return NS_DispatchToMainThread(NS_NewRunnableFunction(
"nsUpdateProcessor::FixUpdateDirectoryPerms::"
"FixUpdateDirectoryPermsRunnable::ReportUpdateError",
[]() -> void {
nsCOMPtr<nsIObserverService> observerService =
services::GetObserverService();
if (NS_WARN_IF(!observerService)) {
return;
}
observerService->NotifyObservers(nullptr, "update-error",
u"bad-perms");
}));
}
};
nsCOMPtr<nsIProperties> dirSvc(
do_GetService("@mozilla.org/file/directory_service;1"));
NS_ENSURE_TRUE(dirSvc, NS_ERROR_FAILURE);
nsCOMPtr<nsIFile> appPath;
nsresult rv = dirSvc->Get(XRE_EXECUTABLE_FILE, NS_GET_IID(nsIFile),
getter_AddRefs(appPath));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIFile> installDir;
rv = appPath->GetParent(getter_AddRefs(installDir));
NS_ENSURE_SUCCESS(rv, rv);
nsAutoString installPath;
rv = installDir->GetPath(installPath);
NS_ENSURE_SUCCESS(rv, rv);
// Stream transport service has a thread pool we can use so that this happens
// off the main thread.
nsCOMPtr<nsIEventTarget> eventTarget =
do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID);
NS_ENSURE_TRUE(eventTarget, NS_ERROR_FAILURE);
nsCOMPtr<nsIRunnable> runnable = new FixUpdateDirectoryPermsRunnable(
"FixUpdateDirectoryPermsRunnable", aUseServiceOnFailure, installPath);
rv = eventTarget->Dispatch(runnable.forget());
NS_ENSURE_SUCCESS(rv, rv);
#endif
return NS_OK;
}
void nsUpdateProcessor::StartStagedUpdate() {
MOZ_ASSERT(!NS_IsMainThread(), "main thread");
nsresult rv = ProcessUpdates(mInfo.mGREDir, mInfo.mAppDir, mInfo.mUpdateRoot,
mInfo.mArgc, mInfo.mArgv,
mInfo.mAppVersion.get(), false, &mUpdaterPID);
NS_ENSURE_SUCCESS_VOID(rv);
if (mUpdaterPID) {
// Track the state of the updater process while it is staging an update.
rv = NS_DispatchToCurrentThread(
NewRunnableMethod("nsUpdateProcessor::WaitForProcess", this,
&nsUpdateProcessor::WaitForProcess));
NS_ENSURE_SUCCESS_VOID(rv);
} else {
// Failed to launch the updater process for some reason.
// We need to shutdown the current thread as there isn't anything more for
// us to do...
rv = NS_DispatchToMainThread(
NewRunnableMethod("nsUpdateProcessor::ShutdownWatcherThread", this,
&nsUpdateProcessor::ShutdownWatcherThread));
NS_ENSURE_SUCCESS_VOID(rv);
}
}
void nsUpdateProcessor::ShutdownWatcherThread() {
MOZ_ASSERT(NS_IsMainThread(), "not main thread");
mProcessWatcher->Shutdown();
mProcessWatcher = nullptr;
}
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));
}
}
void nsUpdateProcessor::UpdateDone() {
MOZ_ASSERT(NS_IsMainThread(), "not main thread");
nsCOMPtr<nsIUpdateManager> um =
do_GetService("@mozilla.org/updates/update-manager;1");
if (um) {
um->RefreshUpdateStatus();
}
ShutdownWatcherThread();
}
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