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gecko/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 "nsCOMPtr.h"
#include "nsString.h"
#include "prproces.h"
#include "prlog.h"
#include "prenv.h"
#include "nsVersionComparator.h"
#include "nsXREDirProvider.h"
#include "SpecialSystemDirectory.h"
#include "nsDirectoryServiceDefs.h"
#include "nsThreadUtils.h"
#include "nsIXULAppInfo.h"
#include "mozilla/Preferences.h"
#ifdef XP_MACOSX
#include "nsILocalFileMac.h"
#include "nsCommandLineServiceMac.h"
#include "MacLaunchHelper.h"
#endif
#if defined(XP_WIN)
# include <direct.h>
# include <process.h>
# include <windows.h>
# include <shlwapi.h>
# define getcwd(path, size) _getcwd(path, size)
# define getpid() GetCurrentProcessId()
#elif defined(XP_OS2)
# include <unistd.h>
# define INCL_DOSFILEMGR
# include <os2.h>
#elif defined(XP_UNIX)
# include <unistd.h>
#endif
//
// 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.
//
// 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 ;-)
//
// A similar #define lives in updater.cpp and should be kept in sync with this.
//
#if defined(XP_UNIX) && !defined(XP_MACOSX)
#define USE_EXECV
#endif
#ifdef PR_LOGGING
static PRLogModuleInfo *sUpdateLog = PR_NewLogModule("updatedriver");
#endif
#define LOG(args) PR_LOG(sUpdateLog, PR_LOG_DEBUG, args)
#ifdef XP_WIN
static const char kUpdaterBin[] = "updater.exe";
#else
static const char kUpdaterBin[] = "updater";
#endif
static const char kUpdaterINI[] = "updater.ini";
#ifdef XP_MACOSX
static const char kUpdaterApp[] = "updater.app";
#endif
#if defined(XP_UNIX) && !defined(XP_MACOSX)
static const char kUpdaterPNG[] = "updater.png";
#endif
#if defined(MOZ_WIDGET_GONK)
static const int kB2GServiceArgc = 2;
static const char *kB2GServiceArgv[] = { "/system/bin/start", "b2g" };
#endif
static nsresult
GetCurrentWorkingDir(char *buf, size_t size)
{
// Cannot use NS_GetSpecialDirectory because XPCOM is not yet initialized.
// This code is duplicated from xpcom/io/SpecialSystemDirectory.cpp:
#if defined(XP_OS2)
if (DosQueryPathInfo( ".", FIL_QUERYFULLNAME, buf, size))
return NS_ERROR_FAILURE;
#elif defined(XP_WIN)
wchar_t wpath[MAX_PATH];
if (!_wgetcwd(wpath, size))
return NS_ERROR_FAILURE;
NS_ConvertUTF16toUTF8 path(wpath);
strncpy(buf, path.get(), size);
#else
if(!getcwd(buf, size))
return NS_ERROR_FAILURE;
#endif
return NS_OK;
}
#if defined(XP_MACOSX)
// This is a copy of OS X's XRE_GetBinaryPath from nsAppRunner.cpp with the
// gBinaryPath check removed so that the updater can reload the stub executable
// instead of xulrunner-bin. See bug 349737.
static nsresult
GetXULRunnerStubPath(const char* argv0, nsIFile* *aResult)
{
// Works even if we're not bundled.
CFBundleRef appBundle = ::CFBundleGetMainBundle();
if (!appBundle)
return NS_ERROR_FAILURE;
CFURLRef bundleURL = ::CFBundleCopyExecutableURL(appBundle);
if (!bundleURL)
return NS_ERROR_FAILURE;
nsCOMPtr<nsILocalFileMac> lfm;
nsresult rv = NS_NewLocalFileWithCFURL(bundleURL, true, getter_AddRefs(lfm));
::CFRelease(bundleURL);
if (NS_FAILED(rv))
return rv;
NS_ADDREF(*aResult = static_cast<nsIFile*>(lfm.get()));
return NS_OK;
}
#endif /* XP_MACOSX */
static bool
GetFile(nsIFile *dir, const nsCSubstring &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 = do_QueryInterface(file, &rv);
return NS_SUCCEEDED(rv);
}
static bool
GetStatusFile(nsIFile *dir, nsCOMPtr<nsIFile> &result)
{
return GetFile(dir, NS_LITERAL_CSTRING("update.status"), result);
}
/**
* Get the contents of the update.status file.
*
* @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])
{
// The buffer needs to be large enough to hold the known status codes
PR_STATIC_ASSERT(Size > 16);
PRFileDesc *fd = nullptr;
nsresult rv = statusFile->OpenNSPRFileDesc(PR_RDONLY, 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,
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 kApplied[] = "applied";
const char kAppliedService[] = "applied-service";
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, NS_LITERAL_CSTRING("update.version"), 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;
if (mozilla::Version(appVersion) > buf)
return true;
return false;
}
static bool
CopyFileIntoUpdateDir(nsIFile *parentDir, const char *leafName, nsIFile *updateDir)
{
nsDependentCString leaf(leafName);
nsCOMPtr<nsIFile> file;
// Make sure there is not an existing file in the target location.
nsresult rv = updateDir->Clone(getter_AddRefs(file));
if (NS_FAILED(rv))
return false;
rv = file->AppendNative(leaf);
if (NS_FAILED(rv))
return false;
file->Remove(true);
// Now, copy into the target location.
rv = parentDir->Clone(getter_AddRefs(file));
if (NS_FAILED(rv))
return false;
rv = file->AppendNative(leaf);
if (NS_FAILED(rv))
return false;
rv = file->CopyToNative(updateDir, EmptyCString());
if (NS_FAILED(rv))
return false;
return true;
}
static bool
CopyUpdaterIntoUpdateDir(nsIFile *greDir, nsIFile *appDir, nsIFile *updateDir,
nsCOMPtr<nsIFile> &updater)
{
// Copy the updater application from the GRE and the updater ini from the app
#if defined(XP_MACOSX)
if (!CopyFileIntoUpdateDir(greDir, kUpdaterApp, updateDir))
return false;
#else
if (!CopyFileIntoUpdateDir(greDir, kUpdaterBin, updateDir))
return false;
#endif
CopyFileIntoUpdateDir(appDir, kUpdaterINI, updateDir);
#if defined(XP_UNIX) && !defined(XP_MACOSX) && !defined(ANDROID)
nsCOMPtr<nsIFile> iconDir;
appDir->Clone(getter_AddRefs(iconDir));
iconDir->AppendNative(NS_LITERAL_CSTRING("icons"));
if (!CopyFileIntoUpdateDir(iconDir, kUpdaterPNG, updateDir))
return false;
#endif
// Finally, return the location of the updater binary.
nsresult rv = updateDir->Clone(getter_AddRefs(updater));
if (NS_FAILED(rv))
return false;
#if defined(XP_MACOSX)
rv = updater->AppendNative(NS_LITERAL_CSTRING(kUpdaterApp));
nsresult tmp = updater->AppendNative(NS_LITERAL_CSTRING("Contents"));
if (NS_FAILED(tmp)) {
rv = tmp;
}
tmp = updater->AppendNative(NS_LITERAL_CSTRING("MacOS"));
if (NS_FAILED(tmp) || NS_FAILED(rv))
return false;
#endif
rv = updater->AppendNative(NS_LITERAL_CSTRING(kUpdaterBin));
return NS_SUCCEEDED(rv);
}
/**
* Switch an existing application directory to an updated version which has been
* previously constructed in the background.
*
* @param greDir the GRE dir
* @param updateDir the update root dir
* @param statusFile the update.status file
* @param appDir the app dir
* @param appArgc the number of args to the application
* @param appArgv the args to the application, used for restarting if needed
*/
static void
SwitchToUpdatedApp(nsIFile *greDir, nsIFile *updateDir, nsIFile *statusFile,
nsIFile *appDir, int appArgc, char **appArgv)
{
nsresult rv;
// Steps:
// - copy updater into temp dir
// - run updater with the correct arguments
nsCOMPtr<nsIFile> tmpDir;
GetSpecialSystemDirectory(OS_TemporaryDirectory,
getter_AddRefs(tmpDir));
if (!tmpDir) {
LOG(("failed getting a temp dir\n"));
return;
}
// Try to create our own new temp directory in case there is already an
// updater binary in the OS temporary location which we cannot write to.
// Note that we don't check for errors here, as if this directory can't
// be created, the following CopyUpdaterIntoUpdateDir call will fail.
tmpDir->Append(NS_LITERAL_STRING("MozUpdater"));
tmpDir->CreateUnique(nsIFile::DIRECTORY_TYPE, 0755);
nsCOMPtr<nsIFile> updater;
if (!CopyUpdaterIntoUpdateDir(greDir, appDir, tmpDir, updater)) {
LOG(("failed copying updater\n"));
return;
}
// We need to use the value returned from XRE_GetBinaryPath when attempting
// to restart the running application.
nsCOMPtr<nsIFile> appFile;
#if defined(XP_MACOSX)
// On OS X we need to pass the location of the xulrunner-stub executable
// rather than xulrunner-bin. See bug 349737.
GetXULRunnerStubPath(appArgv[0], getter_AddRefs(appFile));
#else
XRE_GetBinaryPath(appArgv[0], getter_AddRefs(appFile));
#endif
if (!appFile)
return;
#ifdef XP_WIN
nsAutoString appFilePathW;
rv = appFile->GetPath(appFilePathW);
if (NS_FAILED(rv))
return;
NS_ConvertUTF16toUTF8 appFilePath(appFilePathW);
nsAutoString updaterPathW;
rv = updater->GetPath(updaterPathW);
if (NS_FAILED(rv))
return;
NS_ConvertUTF16toUTF8 updaterPath(updaterPathW);
#else
nsAutoCString appFilePath;
#if defined(MOZ_WIDGET_GONK)
appFilePath.Assign(kB2GServiceArgv[0]);
appArgc = kB2GServiceArgc;
appArgv = const_cast<char**>(kB2GServiceArgv);
#else
rv = appFile->GetNativePath(appFilePath);
if (NS_FAILED(rv))
return;
#endif
nsAutoCString updaterPath;
rv = updater->GetNativePath(updaterPath);
if (NS_FAILED(rv))
return;
#endif
// Get the directory to which the update will be applied. On Mac OSX we need
// to apply the update to the Updated.app directory under the Foo.app
// directory which is the parent of the parent of the appDir. On other
// platforms we will just apply to the appDir/updated.
nsCOMPtr<nsIFile> updatedDir;
#if defined(XP_MACOSX)
nsAutoCString applyToDir;
{
nsCOMPtr<nsIFile> parentDir1, parentDir2;
rv = appDir->GetParent(getter_AddRefs(parentDir1));
if (NS_FAILED(rv))
return;
rv = parentDir1->GetParent(getter_AddRefs(parentDir2));
if (NS_FAILED(rv))
return;
if (!GetFile(parentDir2, NS_LITERAL_CSTRING("Updated.app"), updatedDir))
return;
rv = updatedDir->GetNativePath(applyToDir);
}
#else
if (!GetFile(appDir, NS_LITERAL_CSTRING("updated"), updatedDir))
return;
#if defined(XP_WIN)
nsAutoString applyToDirW;
rv = updatedDir->GetPath(applyToDirW);
NS_ConvertUTF16toUTF8 applyToDir(applyToDirW);
#else
nsAutoCString applyToDir;
rv = updatedDir->GetNativePath(applyToDir);
#endif
#endif
if (NS_FAILED(rv))
return;
// Make sure that the updated directory exists
bool updatedDirExists = false;
updatedDir->Exists(&updatedDirExists);
if (!updatedDirExists) {
return;
}
#if defined(XP_WIN)
nsAutoString updateDirPathW;
rv = updateDir->GetPath(updateDirPathW);
NS_ConvertUTF16toUTF8 updateDirPath(updateDirPathW);
#else
nsAutoCString updateDirPath;
rv = updateDir->GetNativePath(updateDirPath);
#endif
if (NS_FAILED(rv))
return;
// Get the current working directory.
char workingDirPath[MAXPATHLEN];
rv = GetCurrentWorkingDir(workingDirPath, sizeof(workingDirPath));
if (NS_FAILED(rv))
return;
// Construct the PID argument for this process. If we are using execv, then
// we pass "0" which is then ignored by the updater.
#if defined(USE_EXECV)
nsAutoCString pid("0");
#else
nsAutoCString pid;
pid.AppendInt((int32_t) getpid());
#endif
// Append a special token to the PID in order to let the updater know that it
// just needs to replace the update directory.
pid.AppendASCII("/replace");
int argc = appArgc + 5;
char **argv = new char*[argc + 1];
if (!argv)
return;
argv[0] = (char*) updaterPath.get();
argv[1] = (char*) updateDirPath.get();
argv[2] = (char*) applyToDir.get();
argv[3] = (char*) pid.get();
if (appArgc) {
argv[4] = workingDirPath;
argv[5] = (char*) appFilePath.get();
for (int i = 1; i < appArgc; ++i)
argv[5 + i] = appArgv[i];
argc = 5 + appArgc;
argv[argc] = NULL;
} else {
argc = 4;
argv[4] = NULL;
}
if (gSafeMode) {
PR_SetEnv("MOZ_SAFE_MODE_RESTART=1");
}
LOG(("spawning updater process for replacing [%s]\n", updaterPath.get()));
#if defined(USE_EXECV)
# if defined(MOZ_WIDGET_GONK)
// In Gonk, we preload libmozglue, which the updater process doesn't need.
// Since the updater will move and delete libmozglue.so, this can actually
// stop the /system mount from correctly being remounted as read-only.
unsetenv("LD_PRELOAD");
# endif
execv(updaterPath.get(), argv);
#elif defined(XP_WIN)
// Switch the application using updater.exe
if (!WinLaunchChild(updaterPathW.get(), argc, argv)) {
return;
}
_exit(0);
#elif defined(XP_MACOSX)
CommandLineServiceMac::SetupMacCommandLine(argc, argv, true);
// LaunchChildMac uses posix_spawnp and prefers the current
// architecture when launching. It doesn't require a
// null-terminated string but it doesn't matter if we pass one.
LaunchChildMac(argc, argv);
exit(0);
#else
PR_CreateProcessDetached(updaterPath.get(), argv, NULL, NULL);
exit(0);
#endif
}
/**
* Apply an update, possibly in the background.
*
* @param greDir the GRE dir
* @param updateDir the update root dir
* @param statusFile the update.status file
* @param appDir the app dir
* @param appArgc the number of args to the application
* @param appArgv the args to the application, used for restarting if needed
* @param restart if true, apply the update in the foreground and restart the
* application when done. otherwise, apply the update in the
* background and don't restart the application.
* @param outpid out parameter holding the handle to the updater application for
* background updates.
*/
static void
ApplyUpdate(nsIFile *greDir, nsIFile *updateDir, nsIFile *statusFile,
nsIFile *appDir, int appArgc, char **appArgv, bool restart,
ProcessType *outpid)
{
nsresult rv;
// Steps:
// - mark update as 'applying'
// - copy updater into update dir
// - run updater w/ appDir as the current working dir
nsCOMPtr<nsIFile> updater;
if (!CopyUpdaterIntoUpdateDir(greDir, appDir, updateDir, updater)) {
LOG(("failed copying updater\n"));
return;
}
// We need to use the value returned from XRE_GetBinaryPath when attempting
// to restart the running application.
nsCOMPtr<nsIFile> appFile;
#if defined(XP_MACOSX)
// On OS X we need to pass the location of the xulrunner-stub executable
// rather than xulrunner-bin. See bug 349737.
GetXULRunnerStubPath(appArgv[0], getter_AddRefs(appFile));
#else
XRE_GetBinaryPath(appArgv[0], getter_AddRefs(appFile));
#endif
if (!appFile)
return;
#ifdef XP_WIN
nsAutoString appFilePathW;
rv = appFile->GetPath(appFilePathW);
if (NS_FAILED(rv))
return;
NS_ConvertUTF16toUTF8 appFilePath(appFilePathW);
nsAutoString updaterPathW;
rv = updater->GetPath(updaterPathW);
if (NS_FAILED(rv))
return;
NS_ConvertUTF16toUTF8 updaterPath(updaterPathW);
#else
nsAutoCString appFilePath;
rv = appFile->GetNativePath(appFilePath);
if (NS_FAILED(rv))
return;
nsAutoCString updaterPath;
rv = updater->GetNativePath(updaterPath);
if (NS_FAILED(rv))
return;
#endif
// Get the directory to which the update will be applied. On Mac OSX we need
// to apply the update to the Updated.app directory under the Foo.app
// directory which is the parent of the parent of the appDir. On other
// platforms we will just apply to the appDir/updated.
nsCOMPtr<nsIFile> updatedDir;
#if defined(XP_MACOSX)
nsAutoCString applyToDir;
{
nsCOMPtr<nsIFile> parentDir1, parentDir2;
rv = appDir->GetParent(getter_AddRefs(parentDir1));
if (NS_FAILED(rv))
return;
rv = parentDir1->GetParent(getter_AddRefs(parentDir2));
if (NS_FAILED(rv))
return;
if (restart) {
// Use the correct directory if we're not applying the update in the
// background.
rv = parentDir2->GetNativePath(applyToDir);
} else {
if (!GetFile(parentDir2, NS_LITERAL_CSTRING("Updated.app"), updatedDir))
return;
rv = updatedDir->GetNativePath(applyToDir);
}
}
#else
if (restart) {
// Use the correct directory if we're not applying the update in the
// background.
updatedDir = do_QueryInterface(appDir);
} else if (!GetFile(appDir, NS_LITERAL_CSTRING("updated"), updatedDir)) {
return;
}
#if defined(XP_WIN)
nsAutoString applyToDirW;
rv = updatedDir->GetPath(applyToDirW);
NS_ConvertUTF16toUTF8 applyToDir(applyToDirW);
#else
nsAutoCString applyToDir;
rv = updatedDir->GetNativePath(applyToDir);
#endif
#endif
if (NS_FAILED(rv))
return;
#if defined(XP_WIN)
nsAutoString updateDirPathW;
rv = updateDir->GetPath(updateDirPathW);
NS_ConvertUTF16toUTF8 updateDirPath(updateDirPathW);
#else
nsAutoCString updateDirPath;
rv = updateDir->GetNativePath(updateDirPath);
#endif
if (NS_FAILED(rv))
return;
// Get the current working directory.
char workingDirPath[MAXPATHLEN];
rv = GetCurrentWorkingDir(workingDirPath, sizeof(workingDirPath));
if (NS_FAILED(rv))
return;
// We used to write out "Applying" to the update.status file here.
// Instead we do this from within the updater application now.
// This is so that we don't overwrite the status of pending-service
// in the Windows case. This change was made for all platforms so
// that it stays consistent across all OS.
// Construct the PID argument for this process. If we are using execv, then
// we pass "0" which is then ignored by the updater.
nsAutoCString pid;
if (!restart) {
// Signal the updater application that it should apply the update in the
// background.
pid.AssignASCII("-1");
} else {
#if defined(USE_EXECV)
pid.AssignASCII("0");
#else
pid.AppendInt((int32_t) getpid());
#endif
}
int argc = appArgc + 5;
char **argv = new char*[argc + 1];
if (!argv)
return;
argv[0] = (char*) updaterPath.get();
argv[1] = (char*) updateDirPath.get();
argv[2] = (char*) applyToDir.get();
argv[3] = (char*) pid.get();
if (restart && appArgc) {
argv[4] = workingDirPath;
argv[5] = (char*) appFilePath.get();
for (int i = 1; i < appArgc; ++i)
argv[5 + i] = appArgv[i];
argc = 5 + appArgc;
argv[argc] = NULL;
} else {
argc = 4;
argv[4] = NULL;
}
if (gSafeMode) {
PR_SetEnv("MOZ_SAFE_MODE_RESTART=1");
}
LOG(("spawning updater process [%s]\n", updaterPath.get()));
#if defined(USE_EXECV)
// Don't use execv for background updates.
if (restart) {
execv(updaterPath.get(), argv);
} else {
*outpid = PR_CreateProcess(updaterPath.get(), argv, NULL, NULL);
}
#elif defined(XP_WIN)
// Launch the update using updater.exe
if (!WinLaunchChild(updaterPathW.get(), argc, argv, NULL, outpid)) {
return;
}
if (restart) {
// We are going to process an update so we should exit now
_exit(0);
}
#elif defined(XP_MACOSX)
CommandLineServiceMac::SetupMacCommandLine(argc, argv, true);
// LaunchChildMac uses posix_spawnp and prefers the current
// architecture when launching. It doesn't require a
// null-terminated string but it doesn't matter if we pass one.
LaunchChildMac(argc, argv, 0, outpid);
if (restart) {
exit(0);
}
#else
*outpid = PR_CreateProcess(updaterPath.get(), argv, NULL, NULL);
if (restart) {
exit(0);
}
#endif
}
/**
* Wait for a process until it terminates. This call is blocking.
*/
static void
WaitForProcess(ProcessType pt)
{
#if defined(XP_WIN)
WaitForSingleObject(pt, INFINITE);
CloseHandle(pt);
#elif defined(XP_MACOSX)
waitpid(pt, 0, 0);
#else
int32_t exitCode;
PR_WaitProcess(pt, &exitCode);
if (exitCode != 0) {
LOG(("Error while running the updater process, check update.log"));
}
#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));
if (NS_FAILED(rv))
return rv;
rv = updatesDir->AppendNative(NS_LITERAL_CSTRING("updates"));
if (NS_FAILED(rv))
return rv;
rv = updatesDir->AppendNative(NS_LITERAL_CSTRING("0"));
if (NS_FAILED(rv))
return rv;
ProcessType dummyPID; // this will only be used for MOZ_UPDATE_BACKGROUND
const char *processingUpdates = PR_GetEnv("MOZ_PROCESS_UPDATES");
if (processingUpdates && *processingUpdates) {
// Enable the tests to request us to use a different update root directory
const char *updRootOverride = PR_GetEnv("MOZ_UPDATE_ROOT_OVERRIDE");
if (updRootOverride && *updRootOverride) {
nsCOMPtr<nsIFile> overrideDir;
nsAutoCString path(updRootOverride);
rv = NS_NewNativeLocalFile(path, false, getter_AddRefs(overrideDir));
if (NS_FAILED(rv)) {
return rv;
}
updatesDir = do_QueryInterface(overrideDir);
}
// Enable the tests to request us to use a different app directory
const char *appDirOverride = PR_GetEnv("MOZ_UPDATE_APPDIR_OVERRIDE");
if (appDirOverride && *appDirOverride) {
nsCOMPtr<nsIFile> overrideDir;
nsAutoCString path(appDirOverride);
rv = NS_NewNativeLocalFile(path, false, getter_AddRefs(overrideDir));
if (NS_FAILED(rv)) {
return rv;
}
NS_ADDREF(appDir = overrideDir);
}
// Enable the tests to request us to perform a background update
const char *backgroundUpdate = PR_GetEnv("MOZ_UPDATE_BACKGROUND");
if (backgroundUpdate && *backgroundUpdate) {
restart = false;
pid = &dummyPID;
}
}
nsCOMPtr<nsIFile> statusFile;
UpdateStatus status = GetUpdateStatus(updatesDir, statusFile);
switch (status) {
case ePendingUpdate:
case ePendingService: {
nsCOMPtr<nsIFile> versionFile;
// Remove the update if the update application version file doesn't exist
// or if the update's application version is less than the current
// application version.
if (!GetVersionFile(updatesDir, versionFile) ||
IsOlderVersion(versionFile, appVersion)) {
updatesDir->Remove(true);
} else {
ApplyUpdate(greDir, updatesDir, statusFile,
appDir, argc, argv, restart, pid);
}
break;
}
case eAppliedUpdate:
case eAppliedService:
// An update was applied in the background, so we need to switch to using
// it now.
SwitchToUpdatedApp(greDir, updatesDir, statusFile,
appDir, argc, argv);
break;
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_THREADSAFE_ISUPPORTS1(nsUpdateProcessor, nsIUpdateProcessor)
nsUpdateProcessor::nsUpdateProcessor()
: mUpdaterPID(0)
{
}
NS_IMETHODIMP
nsUpdateProcessor::ProcessUpdate(nsIUpdate* aUpdate)
{
nsCOMPtr<nsIFile> greDir, appDir, updRoot;
nsAutoCString appVersion;
int argc;
char **argv;
NS_ENSURE_ARG_POINTER(aUpdate);
nsAutoCString binPath;
nsXREDirProvider* dirProvider = nsXREDirProvider::GetSingleton();
if (dirProvider) { // Normal code path
// Check for and process any available updates
bool persistent;
nsresult rv = dirProvider->GetFile(XRE_UPDATE_ROOT_DIR, &persistent,
getter_AddRefs(updRoot));
// XRE_UPDATE_ROOT_DIR may fail. Fallback to appDir if failed
if (NS_FAILED(rv))
updRoot = dirProvider->GetAppDir();
greDir = dirProvider->GetGREDir();
appDir = dirProvider->GetAppDir();
appVersion = gAppData->version;
argc = gRestartArgc;
argv = gRestartArgv;
} else {
// In the xpcshell environment, the usual XRE_main is not run, so things
// like dirProvider and gAppData do not exist. This code path accesses
// XPCOM (which is not available in the previous code path) in order to get
// the same information.
nsCOMPtr<nsIProperties> ds =
do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID);
if (!ds) {
NS_ABORT(); // There's nothing which we can do if this fails!
}
nsresult rv = ds->Get(NS_GRE_DIR, NS_GET_IID(nsIFile),
getter_AddRefs(greDir));
NS_ASSERTION(NS_SUCCEEDED(rv), "Can't get the GRE dir");
appDir = greDir;
rv = ds->Get(XRE_UPDATE_ROOT_DIR, NS_GET_IID(nsIFile),
getter_AddRefs(updRoot));
if (NS_FAILED(rv))
updRoot = appDir;
nsCOMPtr<nsIXULAppInfo> appInfo =
do_GetService("@mozilla.org/xre/app-info;1");
if (appInfo) {
rv = appInfo->GetVersion(appVersion);
NS_ENSURE_SUCCESS(rv, rv);
} else {
appVersion = MOZ_APP_VERSION;
}
// We need argv[0] to point to the current executable's name. The rest of
// the entries in this array will be ignored if argc<2. Therefore, for
// xpcshell, we only fill out that item, and leave the rest empty.
argc = 1;
nsCOMPtr<nsIFile> binary;
rv = ds->Get(XRE_EXECUTABLE_FILE, NS_GET_IID(nsIFile),
getter_AddRefs(binary));
NS_ASSERTION(NS_SUCCEEDED(rv), "Can't get the binary path");
binary->GetNativePath(binPath);
}
// Copy the parameters to the BackgroundUpdateInfo structure shared with the
// watcher thread.
mInfo.mGREDir = greDir;
mInfo.mAppDir = appDir;
mInfo.mUpdateRoot = updRoot;
mInfo.mArgc = argc;
mInfo.mArgv = new char*[argc];
if (dirProvider) {
for (int i = 0; i < argc; ++i) {
const size_t length = strlen(argv[i]);
mInfo.mArgv[i] = new char[length + 1];
strcpy(mInfo.mArgv[i], argv[i]);
}
} else {
MOZ_ASSERT(argc == 1); // see above
const size_t length = binPath.Length();
mInfo.mArgv[0] = new char[length + 1];
strcpy(mInfo.mArgv[0], binPath.get());
}
mInfo.mAppVersion = appVersion;
mUpdate = aUpdate;
NS_ABORT_IF_FALSE(NS_IsMainThread(), "not main thread");
return NS_NewThread(getter_AddRefs(mProcessWatcher),
NS_NewRunnableMethod(this, &nsUpdateProcessor::StartBackgroundUpdate));
}
void
nsUpdateProcessor::StartBackgroundUpdate()
{
NS_ABORT_IF_FALSE(!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(rv, );
if (mUpdaterPID) {
// Track the state of the background updater process
rv = NS_DispatchToCurrentThread(NS_NewRunnableMethod(this, &nsUpdateProcessor::WaitForProcess));
NS_ENSURE_SUCCESS(rv, );
} else {
// Failed to launch the background 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(NS_NewRunnableMethod(this, &nsUpdateProcessor::ShutdownWatcherThread));
NS_ENSURE_SUCCESS(rv, );
}
}
void
nsUpdateProcessor::ShutdownWatcherThread()
{
NS_ABORT_IF_FALSE(NS_IsMainThread(), "not main thread");
mProcessWatcher->Shutdown();
mProcessWatcher = nullptr;
mUpdate = nullptr;
}
void
nsUpdateProcessor::WaitForProcess()
{
NS_ABORT_IF_FALSE(!NS_IsMainThread(), "main thread");
::WaitForProcess(mUpdaterPID);
NS_DispatchToMainThread(NS_NewRunnableMethod(this, &nsUpdateProcessor::UpdateDone));
}
void
nsUpdateProcessor::UpdateDone()
{
NS_ABORT_IF_FALSE(NS_IsMainThread(), "not main thread");
nsCOMPtr<nsIUpdateManager> um =
do_GetService("@mozilla.org/updates/update-manager;1");
if (um) {
um->RefreshUpdateStatus(mUpdate);
}
ShutdownWatcherThread();
}
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