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/* 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
/**
* Manifest Format
* ---------------
*
* contents = 1*( line )
* line = method LWS *( param LWS ) CRLF
* CRLF = "\r\n"
* LWS = 1*( " " | "\t" )
*
* Available methods for the manifest file:
*
* updatev3.manifest
* -----------------
* method = "add" | "add-if" | "add-if-not" | "patch" | "patch-if" |
* "remove" | "rmdir" | "rmrfdir" | type
*
* 'add-if-not' adds a file if it doesn't exist.
*
* 'type' is the update type (e.g. complete or partial) and when present MUST
* be the first entry in the update manifest. The type is used to support
* removing files that no longer exist when when applying a complete update by
* causing the actions defined in the precomplete file to be performed.
*
* precomplete
* -----------
* method = "remove" | "rmdir"
*/
#include "bspatch.h"
#include "progressui.h"
#include "archivereader.h"
#include "readstrings.h"
#include "updatererrors.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <limits.h>
#include <errno.h>
#include "updatecommon.h"
#ifdef XP_MACOSX
# include "UpdateSettingsUtil.h"
# include "updaterfileutils_osx.h"
#endif // XP_MACOSX
#include "mozilla/CmdLineAndEnvUtils.h"
#include "mozilla/UniquePtr.h"
#ifdef XP_WIN
# include "mozilla/Maybe.h"
# include "mozilla/WinHeaderOnlyUtils.h"
# include <climits>
#endif // XP_WIN
// Amount of the progress bar to use in each of the 3 update stages,
// should total 100.0.
#define PROGRESS_PREPARE_SIZE 20.0f
#define PROGRESS_EXECUTE_SIZE 75.0f
#define PROGRESS_FINISH_SIZE 5.0f
// Maximum amount of time in ms to wait for the parent process to close. The 30
// seconds is rather long but there have been bug reports where the parent
// process has exited after 10 seconds and it is better to give it a chance.
#define PARENT_WAIT 30000
#if defined(XP_MACOSX)
// These functions are defined in launchchild_osx.mm
void CleanupElevatedMacUpdate(bool aFailureOccurred);
bool IsOwnedByGroupAdmin(const char* aAppBundle);
bool IsRecursivelyWritable(const char* aPath);
void LaunchMacApp(int argc, const char** argv);
void LaunchMacPostProcess(const char* aAppBundle);
bool ObtainUpdaterArguments(int* aArgc, char*** aArgv,
MARChannelStringTable* aMARStrings);
bool ServeElevatedUpdate(int aArgc, const char** aArgv,
const char* aMARChannelID);
void SetGroupOwnershipAndPermissions(const char* aAppBundle);
bool PerformInstallationFromDMG(int argc, char** argv);
struct UpdateServerThreadArgs {
int argc;
const NS_tchar** argv;
const char* marChannelID;
};
#endif
#ifndef _O_BINARY
# define _O_BINARY 0
#endif
#ifndef NULL
# define NULL (0)
#endif
#ifndef SSIZE_MAX
# define SSIZE_MAX LONG_MAX
#endif
// We want to use execv to invoke the callback executable on platforms where
// we were launched using execv. See nsUpdateDriver.cpp.
#if defined(XP_UNIX) && !defined(XP_MACOSX)
# define USE_EXECV
#endif
#if defined(XP_OPENBSD)
# define stat64 stat
#endif
#if defined(MOZ_VERIFY_MAR_SIGNATURE) && defined(MAR_NSS)
# include "nss.h"
# include "prerror.h"
#endif
#include "crctable.h"
#ifdef XP_WIN
# ifdef MOZ_MAINTENANCE_SERVICE
# include "registrycertificates.h"
# endif
BOOL PathAppendSafe(LPWSTR base, LPCWSTR extra);
BOOL PathGetSiblingFilePath(LPWSTR destinationBuffer, LPCWSTR siblingFilePath,
LPCWSTR newFileName);
# include "updatehelper.h"
// Closes the handle if valid and if the updater is elevated returns with the
// return code specified. This prevents multiple launches of the callback
// application by preventing the elevated process from launching the callback.
# define EXIT_WHEN_ELEVATED(path, handle, retCode) \
{ \
if (handle != INVALID_HANDLE_VALUE) { \
CloseHandle(handle); \
} \
if (NS_tremove(path) && errno != ENOENT) { \
return retCode; \
} \
}
#endif
//-----------------------------------------------------------------------------
// This BZ2_crc32Table variable lives in libbz2. We just took the
// data structure from bz2 and created crctables.h
static unsigned int crc32(const unsigned char* buf, unsigned int len) {
unsigned int crc = 0xffffffffL;
const unsigned char* end = buf + len;
for (; buf != end; ++buf)
crc = (crc << 8) ^ BZ2_crc32Table[(crc >> 24) ^ *buf];
crc = ~crc;
return crc;
}
//-----------------------------------------------------------------------------
// A simple stack based container for a FILE struct that closes the
// file descriptor from its destructor.
class AutoFile {
public:
explicit AutoFile(FILE* file = nullptr) : mFile(file) {}
~AutoFile() { close(); }
AutoFile& operator=(FILE* file) {
close();
mFile = file;
return *this;
}
operator FILE*() { return mFile; }
FILE* get() { return mFile; }
private:
FILE* mFile;
void close() {
if (mFile != nullptr) {
int rv = fclose(mFile);
if (rv != 0) {
LOG(("File close did not execute successfully"));
}
mFile = nullptr;
}
}
};
//-----------------------------------------------------------------------------
#ifdef XP_MACOSX
// Just a simple class that sets a umask value in its constructor and resets
// it in its destructor.
class UmaskContext {
public:
explicit UmaskContext(mode_t umaskToSet);
~UmaskContext();
private:
mode_t mPreviousUmask;
};
UmaskContext::UmaskContext(mode_t umaskToSet) {
mPreviousUmask = umask(umaskToSet);
}
UmaskContext::~UmaskContext() { umask(mPreviousUmask); }
#endif
//-----------------------------------------------------------------------------
typedef void (*ThreadFunc)(void* param);
#ifdef XP_WIN
# include <process.h>
class Thread {
public:
int Run(ThreadFunc func, void* param) {
mThreadFunc = func;
mThreadParam = param;
unsigned int threadID;
mThread =
(HANDLE)_beginthreadex(nullptr, 0, ThreadMain, this, 0, &threadID);
return mThread ? 0 : -1;
}
int Join() {
WaitForSingleObject(mThread, INFINITE);
CloseHandle(mThread);
return 0;
}
private:
static unsigned __stdcall ThreadMain(void* p) {
Thread* self = (Thread*)p;
self->mThreadFunc(self->mThreadParam);
return 0;
}
HANDLE mThread;
ThreadFunc mThreadFunc;
void* mThreadParam;
};
#elif defined(XP_UNIX)
# include <pthread.h>
class Thread {
public:
int Run(ThreadFunc func, void* param) {
return pthread_create(&thr, nullptr, (void* (*)(void*))func, param);
}
int Join() {
void* result;
return pthread_join(thr, &result);
}
private:
pthread_t thr;
};
#else
# error "Unsupported platform"
#endif
//-----------------------------------------------------------------------------
static NS_tchar gPatchDirPath[MAXPATHLEN];
static NS_tchar gInstallDirPath[MAXPATHLEN];
static NS_tchar gWorkingDirPath[MAXPATHLEN];
static ArchiveReader gArchiveReader;
static bool gSucceeded = false;
static bool sStagedUpdate = false;
static bool sReplaceRequest = false;
static bool sUsingService = false;
// The updater binary can potentially run twice. It will always initially run
// with `gIsElevated == false`. If it is run an additional time with elevation,
// that iteration will run with `gIsElevated == true`.
static bool gIsElevated = false;
// This string contains the MAR channel IDs that are later extracted by one of
// the `ReadMARChannelIDsFrom` variants.
static MARChannelStringTable gMARStrings;
// Normally, we run updates as a result of user action (the user started Firefox
// or clicked a "Restart to Update" button). But there are some cases when
// we are not:
// a) The callback app is a background task. If true then the updater is
// likely being run as part of a background task.
// The updater could be run with no callback, but this only happens
// when performing a staged update (see calls to ProcessUpdates), and there
// are already checks for sStagedUpdate when showing UI or elevating.
// b) The environment variable MOZ_APP_SILENT_START is set and not empty. This
// is set, for instance, on macOS when Firefox had no windows open for a
// while and restarted to apply updates.
//
// In these cases, the update should be installed silently, so we shouldn't:
// a) show progress UI
// b) prompt for elevation
static bool sUpdateSilently = false;
#ifdef XP_WIN
static NS_tchar gCallbackRelPath[MAXPATHLEN];
static NS_tchar gCallbackBackupPath[MAXPATHLEN];
static NS_tchar gDeleteDirPath[MAXPATHLEN];
// Whether to copy the update-elevated.log and update.status file to the update
// patch directory from a secure directory.
static bool gCopyOutputFiles = false;
// Whether to write the update-elevated.log and update.status file to a secure
// directory.
static bool gUseSecureOutputPath = false;
#endif
static const NS_tchar kWhitespace[] = NS_T(" \t");
static const NS_tchar kNL[] = NS_T("\r\n");
static const NS_tchar kQuote[] = NS_T("\"");
static inline size_t mmin(size_t a, size_t b) { return (a > b) ? b : a; }
static NS_tchar* mstrtok(const NS_tchar* delims, NS_tchar** str) {
if (!*str || !**str) {
*str = nullptr;
return nullptr;
}
// skip leading "whitespace"
NS_tchar* ret = *str;
const NS_tchar* d;
do {
for (d = delims; *d != NS_T('\0'); ++d) {
if (*ret == *d) {
++ret;
break;
}
}
} while (*d);
if (!*ret) {
*str = ret;
return nullptr;
}
NS_tchar* i = ret;
do {
for (d = delims; *d != NS_T('\0'); ++d) {
if (*i == *d) {
*i = NS_T('\0');
*str = ++i;
return ret;
}
}
++i;
} while (*i);
*str = nullptr;
return ret;
}
#if defined(TEST_UPDATER) || defined(XP_WIN) || defined(XP_MACOSX)
static bool EnvHasValue(const char* name) {
const char* val = getenv(name);
return (val && *val);
}
#endif
static const NS_tchar* UpdateLogFilename() {
if (gIsElevated) {
return NS_T("update-elevated.log");
}
return NS_T("update.log");
}
#ifdef XP_WIN
/**
* Obtains the update ID from the secure id file located in secure output
* directory.
*
* @param outBuf
* A buffer of size UUID_LEN (e.g. 37) to store the result. The uuid is
* 36 characters in length and 1 more for null termination.
* @return true if successful
*/
bool GetSecureID(char* outBuf) {
NS_tchar idFilePath[MAX_PATH + 1] = {L'\0'};
if (!GetSecureOutputFilePath(gPatchDirPath, L".id", idFilePath)) {
return false;
}
AutoFile idFile(NS_tfopen(idFilePath, NS_T("rb")));
if (idFile == nullptr) {
return false;
}
size_t read = fread(outBuf, UUID_LEN - 1, 1, idFile);
if (read != 1) {
return false;
}
outBuf[UUID_LEN - 1] = '\0';
return true;
}
#endif
/**
* Calls LogFinish for the update log. On Windows, the unelevated updater copies
* the update status file and the update log file that were written by the
* elevated updater from the secure directory to the update patch directory.
*
* NOTE: All calls to WriteStatusFile MUST happen before calling output_finish
* because this function copies the update status file for the elevated
* updater and writing the status file after calling output_finish will
* overwrite it.
*/
static void output_finish() {
LogFinish();
#ifdef XP_WIN
if (gCopyOutputFiles) {
NS_tchar srcStatusPath[MAXPATHLEN + 1] = {NS_T('\0')};
if (GetSecureOutputFilePath(gPatchDirPath, L".status", srcStatusPath)) {
NS_tchar dstStatusPath[MAXPATHLEN + 1] = {NS_T('\0')};
NS_tsnprintf(dstStatusPath,
sizeof(dstStatusPath) / sizeof(dstStatusPath[0]),
NS_T("%s\\update.status"), gPatchDirPath);
CopyFileW(srcStatusPath, dstStatusPath, false);
}
NS_tchar srcLogPath[MAXPATHLEN + 1] = {NS_T('\0')};
if (GetSecureOutputFilePath(gPatchDirPath, L".log", srcLogPath)) {
NS_tchar dstLogPath[MAXPATHLEN + 1] = {NS_T('\0')};
// Unconditionally use "update-elevated.log" here rather than
// `UpdateLogFilename` since (a) secure output files are only created by
// elevated instances and (b) the copying of the secure output file is
// done by the unelevated instance, so `UpdateLogFilename` will return
// the wrong thing for this.
NS_tsnprintf(dstLogPath, sizeof(dstLogPath) / sizeof(dstLogPath[0]),
NS_T("%s\\update-elevated.log"), gPatchDirPath);
CopyFileW(srcLogPath, dstLogPath, false);
}
}
#endif
}
/**
* Coverts a relative update path to a full path.
*
* @param relpath
* The relative path to convert to a full path.
* @return valid filesystem full path or nullptr if memory allocation fails.
*/
static NS_tchar* get_full_path(const NS_tchar* relpath) {
NS_tchar* destpath = sStagedUpdate ? gWorkingDirPath : gInstallDirPath;
size_t lendestpath = NS_tstrlen(destpath);
size_t lenrelpath = NS_tstrlen(relpath);
NS_tchar* s = new NS_tchar[lendestpath + lenrelpath + 2];
NS_tchar* c = s;
NS_tstrcpy(c, destpath);
c += lendestpath;
NS_tstrcat(c, NS_T("/"));
c++;
NS_tstrcat(c, relpath);
c += lenrelpath;
*c = NS_T('\0');
return s;
}
/**
* Converts a full update path into a relative path; reverses get_full_path.
*
* @param fullpath
* The absolute path to convert into a relative path.
* return pointer to the location within fullpath where the relative path starts
* or fullpath itself if it already looks relative.
*/
#ifndef XP_WIN
static const NS_tchar* get_relative_path(const NS_tchar* fullpath) {
if (fullpath[0] != '/') {
return fullpath;
}
NS_tchar* prefix = sStagedUpdate ? gWorkingDirPath : gInstallDirPath;
// If the path isn't long enough to be absolute, return it as-is.
if (NS_tstrlen(fullpath) <= NS_tstrlen(prefix)) {
return fullpath;
}
return fullpath + NS_tstrlen(prefix) + 1;
}
#endif
/**
* Gets the platform specific path and performs simple checks to the path. If
* the path checks don't pass nullptr will be returned.
*
* @param line
* The line from the manifest that contains the path.
* @param isdir
* Whether the path is a directory path. Defaults to false.
* @return valid filesystem path or nullptr if the path checks fail.
*/
static NS_tchar* get_valid_path(NS_tchar** line, bool isdir = false) {
NS_tchar* path = mstrtok(kQuote, line);
if (!path) {
LOG(("get_valid_path: unable to determine path: " LOG_S, *line));
return nullptr;
}
// All paths must be relative from the current working directory
if (path[0] == NS_T('/')) {
LOG(("get_valid_path: path must be relative: " LOG_S, path));
return nullptr;
}
#ifdef XP_WIN
// All paths must be relative from the current working directory
if (path[0] == NS_T('\\') || path[1] == NS_T(':')) {
LOG(("get_valid_path: path must be relative: " LOG_S, path));
return nullptr;
}
#endif
if (isdir) {
// Directory paths must have a trailing forward slash.
if (path[NS_tstrlen(path) - 1] != NS_T('/')) {
LOG(
("get_valid_path: directory paths must have a trailing forward "
"slash: " LOG_S,
path));
return nullptr;
}
// Remove the trailing forward slash because stat on Windows will return
// ENOENT if the path has a trailing slash.
path[NS_tstrlen(path) - 1] = NS_T('\0');
}
// Don't allow relative paths that resolve to a parent directory.
if (NS_tstrstr(path, NS_T("..")) != nullptr) {
LOG(("get_valid_path: paths must not contain '..': " LOG_S, path));
return nullptr;
}
return path;
}
/*
* Gets a quoted path. The return value is malloc'd and it is the responsibility
* of the caller to free it.
*
* @param path
* The path to quote.
* @return On success the quoted path and nullptr otherwise.
*/
static NS_tchar* get_quoted_path(const NS_tchar* path) {
size_t lenQuote = NS_tstrlen(kQuote);
size_t lenPath = NS_tstrlen(path);
size_t len = lenQuote + lenPath + lenQuote + 1;
NS_tchar* s = (NS_tchar*)malloc(len * sizeof(NS_tchar));
if (!s) {
return nullptr;
}
NS_tchar* c = s;
NS_tstrcpy(c, kQuote);
c += lenQuote;
NS_tstrcat(c, path);
c += lenPath;
NS_tstrcat(c, kQuote);
c += lenQuote;
*c = NS_T('\0');
return s;
}
static void ensure_write_permissions(const NS_tchar* path) {
#ifdef XP_WIN
(void)_wchmod(path, _S_IREAD | _S_IWRITE);
#else
struct stat fs;
if (!stat(path, &fs) && !(fs.st_mode & S_IWUSR)) {
(void)chmod(path, fs.st_mode | S_IWUSR);
}
#endif
}
static int ensure_remove(const NS_tchar* path) {
ensure_write_permissions(path);
int rv = NS_tremove(path);
if (rv) {
LOG(("ensure_remove: failed to remove file: " LOG_S ", rv: %d, err: %d",
path, rv, errno));
}
return rv;
}
// Remove the directory pointed to by path and all of its files and
// sub-directories.
static int ensure_remove_recursive(const NS_tchar* path,
bool continueEnumOnFailure = false) {
// We use lstat rather than stat here so that we can successfully remove
// symlinks.
struct NS_tstat_t sInfo;
int rv = NS_tlstat(path, &sInfo);
if (rv) {
// This error is benign
return rv;
}
if (!S_ISDIR(sInfo.st_mode)) {
return ensure_remove(path);
}
NS_tDIR* dir;
NS_tdirent* entry;
dir = NS_topendir(path);
if (!dir) {
LOG(("ensure_remove_recursive: unable to open directory: " LOG_S
", rv: %d, err: %d",
path, rv, errno));
return rv;
}
while ((entry = NS_treaddir(dir)) != 0) {
if (NS_tstrcmp(entry->d_name, NS_T(".")) &&
NS_tstrcmp(entry->d_name, NS_T(".."))) {
NS_tchar childPath[MAXPATHLEN];
NS_tsnprintf(childPath, sizeof(childPath) / sizeof(childPath[0]),
NS_T("%s/%s"), path, entry->d_name);
rv = ensure_remove_recursive(childPath);
if (rv && !continueEnumOnFailure) {
break;
}
}
}
NS_tclosedir(dir);
if (rv == OK) {
ensure_write_permissions(path);
rv = NS_trmdir(path);
if (rv) {
LOG(("ensure_remove_recursive: unable to remove directory: " LOG_S
", rv: %d, err: %d",
path, rv, errno));
}
}
return rv;
}
static bool is_read_only(const NS_tchar* flags) {
size_t length = NS_tstrlen(flags);
if (length == 0) {
return false;
}
// Make sure the string begins with "r"
if (flags[0] != NS_T('r')) {
return false;
}
// Look for "r+" or "r+b"
if (length > 1 && flags[1] == NS_T('+')) {
return false;
}
// Look for "rb+"
if (NS_tstrcmp(flags, NS_T("rb+")) == 0) {
return false;
}
return true;
}
static FILE* ensure_open(const NS_tchar* path, const NS_tchar* flags,
unsigned int options) {
ensure_write_permissions(path);
FILE* f = NS_tfopen(path, flags);
if (is_read_only(flags)) {
// Don't attempt to modify the file permissions if the file is being opened
// in read-only mode.
return f;
}
if (NS_tchmod(path, options) != 0) {
if (f != nullptr) {
fclose(f);
}
return nullptr;
}
struct NS_tstat_t ss;
if (NS_tstat(path, &ss) != 0 || ss.st_mode != options) {
if (f != nullptr) {
fclose(f);
}
return nullptr;
}
return f;
}
// Ensure that the directory containing this file exists.
static int ensure_parent_dir(const NS_tchar* path) {
int rv = OK;
NS_tchar* slash = (NS_tchar*)NS_tstrrchr(path, NS_T('/'));
if (slash) {
*slash = NS_T('\0');
rv = ensure_parent_dir(path);
// Only attempt to create the directory if we're not at the root
if (rv == OK && *path) {
rv = NS_tmkdir(path, 0755);
// If the directory already exists, then ignore the error.
if (rv < 0 && errno != EEXIST) {
LOG(("ensure_parent_dir: failed to create directory: " LOG_S ", "
"err: %d",
path, errno));
rv = WRITE_ERROR;
} else {
rv = OK;
}
}
*slash = NS_T('/');
}
return rv;
}
#ifdef XP_UNIX
static int ensure_copy_symlink(const NS_tchar* path, const NS_tchar* dest) {
// Copy symlinks by creating a new symlink to the same target
NS_tchar target[MAXPATHLEN + 1] = {NS_T('\0')};
int rv = readlink(path, target, MAXPATHLEN);
if (rv == -1) {
LOG(("ensure_copy_symlink: failed to read the link: " LOG_S ", err: %d",
path, errno));
return READ_ERROR;
}
rv = symlink(target, dest);
if (rv == -1) {
LOG(("ensure_copy_symlink: failed to create the new link: " LOG_S
", target: " LOG_S " err: %d",
dest, target, errno));
return READ_ERROR;
}
return 0;
}
#endif
// Copy the file named path onto a new file named dest.
static int ensure_copy(const NS_tchar* path, const NS_tchar* dest) {
#ifdef XP_WIN
// Fast path for Windows
bool result = CopyFileW(path, dest, false);
if (!result) {
LOG(("ensure_copy: failed to copy the file " LOG_S " over to " LOG_S
", lasterr: %lx",
path, dest, GetLastError()));
return WRITE_ERROR_FILE_COPY;
}
return OK;
#else
struct NS_tstat_t ss;
int rv = NS_tlstat(path, &ss);
if (rv) {
LOG(("ensure_copy: failed to read file status info: " LOG_S ", err: %d",
path, errno));
return READ_ERROR;
}
# ifdef XP_UNIX
if (S_ISLNK(ss.st_mode)) {
return ensure_copy_symlink(path, dest);
}
# endif
AutoFile infile(ensure_open(path, NS_T("rb"), ss.st_mode));
if (!infile) {
LOG(("ensure_copy: failed to open the file for reading: " LOG_S ", err: %d",
path, errno));
return READ_ERROR;
}
AutoFile outfile(ensure_open(dest, NS_T("wb"), ss.st_mode));
if (!outfile) {
LOG(("ensure_copy: failed to open the file for writing: " LOG_S ", err: %d",
dest, errno));
return WRITE_ERROR;
}
// This block size was chosen pretty arbitrarily but seems like a reasonable
// compromise. For example, the optimal block size on a modern OS X machine
// is 100k */
const int blockSize = 32 * 1024;
void* buffer = malloc(blockSize);
if (!buffer) {
return UPDATER_MEM_ERROR;
}
while (!feof(infile.get())) {
size_t read = fread(buffer, 1, blockSize, infile);
if (ferror(infile.get())) {
LOG(("ensure_copy: failed to read the file: " LOG_S ", err: %d", path,
errno));
free(buffer);
return READ_ERROR;
}
size_t written = 0;
while (written < read) {
size_t chunkWritten = fwrite(buffer, 1, read - written, outfile);
if (chunkWritten <= 0) {
LOG(("ensure_copy: failed to write the file: " LOG_S ", err: %d", dest,
errno));
free(buffer);
return WRITE_ERROR_FILE_COPY;
}
written += chunkWritten;
}
}
rv = NS_tchmod(dest, ss.st_mode);
free(buffer);
return rv;
#endif
}
template <unsigned N>
struct copy_recursive_skiplist {
NS_tchar paths[N][MAXPATHLEN];
void append(unsigned index, const NS_tchar* path, const NS_tchar* suffix) {
NS_tsnprintf(paths[index], MAXPATHLEN, NS_T("%s/%s"), path, suffix);
}
bool find(const NS_tchar* path) {
for (int i = 0; i < static_cast<int>(N); ++i) {
if (!NS_tstricmp(paths[i], path)) {
return true;
}
}
return false;
}
};
// Copy all of the files and subdirectories under path to a new directory named
// dest. The path names in the skiplist will be skipped and will not be copied.
template <unsigned N>
static int ensure_copy_recursive(const NS_tchar* path, const NS_tchar* dest,
copy_recursive_skiplist<N>& skiplist) {
struct NS_tstat_t sInfo;
int rv = NS_tlstat(path, &sInfo);
if (rv) {
LOG(("ensure_copy_recursive: path doesn't exist: " LOG_S
", rv: %d, err: %d",
path, rv, errno));
return READ_ERROR;
}
#ifdef XP_UNIX
if (S_ISLNK(sInfo.st_mode)) {
return ensure_copy_symlink(path, dest);
}
#endif
if (!S_ISDIR(sInfo.st_mode)) {
return ensure_copy(path, dest);
}
rv = NS_tmkdir(dest, sInfo.st_mode);
if (rv < 0 && errno != EEXIST) {
LOG(("ensure_copy_recursive: could not create destination directory: " LOG_S
", rv: %d, err: %d",
path, rv, errno));
return WRITE_ERROR;
}
NS_tDIR* dir;
NS_tdirent* entry;
dir = NS_topendir(path);
if (!dir) {
LOG(("ensure_copy_recursive: path is not a directory: " LOG_S
", rv: %d, err: %d",
path, rv, errno));
return READ_ERROR;
}
while ((entry = NS_treaddir(dir)) != 0) {
if (NS_tstrcmp(entry->d_name, NS_T(".")) &&
NS_tstrcmp(entry->d_name, NS_T(".."))) {
NS_tchar childPath[MAXPATHLEN];
NS_tsnprintf(childPath, sizeof(childPath) / sizeof(childPath[0]),
NS_T("%s/%s"), path, entry->d_name);
if (skiplist.find(childPath)) {
continue;
}
NS_tchar childPathDest[MAXPATHLEN];
NS_tsnprintf(childPathDest,
sizeof(childPathDest) / sizeof(childPathDest[0]),
NS_T("%s/%s"), dest, entry->d_name);
rv = ensure_copy_recursive(childPath, childPathDest, skiplist);
if (rv) {
break;
}
}
}
NS_tclosedir(dir);
return rv;
}
// Renames the specified file to the new file specified. If the destination file
// exists it is removed.
static int rename_file(const NS_tchar* spath, const NS_tchar* dpath,
bool allowDirs = false) {
int rv = ensure_parent_dir(dpath);
if (rv) {
return rv;
}
struct NS_tstat_t spathInfo;
rv = NS_tstat(spath, &spathInfo);
if (rv) {
LOG(("rename_file: failed to read file status info: " LOG_S ", "
"err: %d",
spath, errno));
return READ_ERROR;
}
if (!S_ISREG(spathInfo.st_mode)) {
if (allowDirs && !S_ISDIR(spathInfo.st_mode)) {
LOG(("rename_file: path present, but not a file: " LOG_S ", err: %d",
spath, errno));
return RENAME_ERROR_EXPECTED_FILE;
}
LOG(("rename_file: proceeding to rename the directory"));
}
if (!NS_taccess(dpath, F_OK)) {
if (ensure_remove(dpath)) {
LOG(
("rename_file: destination file exists and could not be "
"removed: " LOG_S,
dpath));
return WRITE_ERROR_DELETE_FILE;
}
}
if (NS_trename(spath, dpath) != 0) {
LOG(("rename_file: failed to rename file - src: " LOG_S ", "
"dst:" LOG_S ", err: %d",
spath, dpath, errno));
return WRITE_ERROR;
}
return OK;
}
#ifdef XP_WIN
// Remove the directory pointed to by path and all of its files and
// sub-directories. If a file is in use move it to the tobedeleted directory
// and attempt to schedule removal of the file on reboot
static int remove_recursive_on_reboot(const NS_tchar* path,
const NS_tchar* deleteDir) {
struct NS_tstat_t sInfo;
int rv = NS_tlstat(path, &sInfo);
if (rv) {
// This error is benign
return rv;
}
if (!S_ISDIR(sInfo.st_mode)) {
NS_tchar tmpDeleteFile[MAXPATHLEN + 1];
GetUUIDTempFilePath(deleteDir, L"rep", tmpDeleteFile);
if (NS_tremove(tmpDeleteFile) && errno != ENOENT) {
LOG(("remove_recursive_on_reboot: failed to remove temporary file: " LOG_S
", err: %d",
tmpDeleteFile, errno));
}
rv = rename_file(path, tmpDeleteFile, false);
if (MoveFileEx(rv ? path : tmpDeleteFile, nullptr,
MOVEFILE_DELAY_UNTIL_REBOOT)) {
LOG(
("remove_recursive_on_reboot: file will be removed on OS "
"reboot: " LOG_S,
rv ? path : tmpDeleteFile));
} else {
LOG((
"remove_recursive_on_reboot: failed to schedule OS reboot removal of "
"file: " LOG_S,
rv ? path : tmpDeleteFile));
}
return rv;
}
NS_tDIR* dir;
NS_tdirent* entry;
dir = NS_topendir(path);
if (!dir) {
LOG(("remove_recursive_on_reboot: unable to open directory: " LOG_S
", rv: %d, err: %d",
path, rv, errno));
return rv;
}
while ((entry = NS_treaddir(dir)) != 0) {
if (NS_tstrcmp(entry->d_name, NS_T(".")) &&
NS_tstrcmp(entry->d_name, NS_T(".."))) {
NS_tchar childPath[MAXPATHLEN];
NS_tsnprintf(childPath, sizeof(childPath) / sizeof(childPath[0]),
NS_T("%s/%s"), path, entry->d_name);
// There is no need to check the return value of this call since this
// function is only called after an update is successful and there is not
// much that can be done to recover if it isn't successful. There is also
// no need to log the value since it will have already been logged.
remove_recursive_on_reboot(childPath, deleteDir);
}
}
NS_tclosedir(dir);
if (rv == OK) {
ensure_write_permissions(path);
rv = NS_trmdir(path);
if (rv) {
LOG(("remove_recursive_on_reboot: unable to remove directory: " LOG_S
", rv: %d, err: %d",
path, rv, errno));
}
}
return rv;
}
#endif
//-----------------------------------------------------------------------------
// Create a backup of the specified file by renaming it.
static int backup_create(const NS_tchar* path) {
NS_tchar backup[MAXPATHLEN];
NS_tsnprintf(backup, sizeof(backup) / sizeof(backup[0]),
NS_T("%s") BACKUP_EXT, path);
return rename_file(path, backup);
}
// Rename the backup of the specified file that was created by renaming it back
// to the original file.
static int backup_restore(const NS_tchar* path, const NS_tchar* relPath) {
NS_tchar backup[MAXPATHLEN];
NS_tsnprintf(backup, sizeof(backup) / sizeof(backup[0]),
NS_T("%s") BACKUP_EXT, path);
NS_tchar relBackup[MAXPATHLEN];
NS_tsnprintf(relBackup, sizeof(relBackup) / sizeof(relBackup[0]),
NS_T("%s") BACKUP_EXT, relPath);
if (NS_taccess(backup, F_OK)) {
LOG(("backup_restore: backup file doesn't exist: " LOG_S, relBackup));
return OK;
}
return rename_file(backup, path);
}
// Discard the backup of the specified file that was created by renaming it.
static int backup_discard(const NS_tchar* path, const NS_tchar* relPath) {
NS_tchar backup[MAXPATHLEN];
NS_tsnprintf(backup, sizeof(backup) / sizeof(backup[0]),
NS_T("%s") BACKUP_EXT, path);
NS_tchar relBackup[MAXPATHLEN];
NS_tsnprintf(relBackup, sizeof(relBackup) / sizeof(relBackup[0]),
NS_T("%s") BACKUP_EXT, relPath);
// Nothing to discard
if (NS_taccess(backup, F_OK)) {
return OK;
}
int rv = ensure_remove(backup);
#if defined(XP_WIN)
if (rv && !sStagedUpdate && !sReplaceRequest) {
LOG(("backup_discard: unable to remove: " LOG_S, relBackup));
NS_tchar path[MAXPATHLEN + 1];
GetUUIDTempFilePath(gDeleteDirPath, L"moz", path);
if (rename_file(backup, path)) {
LOG(("backup_discard: failed to rename file:" LOG_S ", dst:" LOG_S,
relBackup, relPath));
return WRITE_ERROR_DELETE_BACKUP;
}
// The MoveFileEx call to remove the file on OS reboot will fail if the
// process doesn't have write access to the HKEY_LOCAL_MACHINE registry key
// but this is ok since the installer / uninstaller will delete the
// directory containing the file along with its contents after an update is
// applied, on reinstall, and on uninstall.
if (MoveFileEx(path, nullptr, MOVEFILE_DELAY_UNTIL_REBOOT)) {
LOG(
("backup_discard: file renamed and will be removed on OS "
"reboot: " LOG_S,
relPath));
} else {
LOG(
("backup_discard: failed to schedule OS reboot removal of "
"file: " LOG_S,
relPath));
}
}
#else
if (rv) {
return WRITE_ERROR_DELETE_BACKUP;
}
#endif
return OK;
}
// Helper function for post-processing a temporary backup.
static void backup_finish(const NS_tchar* path, const NS_tchar* relPath,
int status) {
if (status == OK) {
backup_discard(path, relPath);
} else {
backup_restore(path, relPath);
}
}
//-----------------------------------------------------------------------------
static int DoUpdate();
class Action {
public:
Action() : mProgressCost(1), mNext(nullptr) {}
virtual ~Action() = default;
virtual int Parse(NS_tchar* line) = 0;
// Do any preprocessing to ensure that the action can be performed. Execute
// will be called if this Action and all others return OK from this method.
virtual int Prepare() = 0;
// Perform the operation. Return OK to indicate success. After all actions
// have been executed, Finish will be called. A requirement of Execute is
// that its operation be reversable from Finish.
virtual int Execute() = 0;
// Finish is called after execution of all actions. If status is OK, then
// all actions were successfully executed. Otherwise, some action failed.
virtual void Finish(int status) = 0;
int mProgressCost;
private:
Action* mNext;
friend class ActionList;
};
class RemoveFile : public Action {
public:
RemoveFile() : mSkip(0) {}
int Parse(NS_tchar* line) override;
int Prepare() override;
int Execute() override;
void Finish(int status) override;
private:
mozilla::UniquePtr<NS_tchar[]> mFile;
mozilla::UniquePtr<NS_tchar[]> mRelPath;
int mSkip;
};
int RemoveFile::Parse(NS_tchar* line) {
// format "<deadfile>"
NS_tchar* validPath = get_valid_path(&line);
if (!validPath) {
return PARSE_ERROR;
}
mRelPath = mozilla::MakeUnique<NS_tchar[]>(MAXPATHLEN);
NS_tstrcpy(mRelPath.get(), validPath);
mFile.reset(get_full_path(validPath));
if (!mFile) {
return PARSE_ERROR;
}
return OK;
}
int RemoveFile::Prepare() {
// Skip the file if it already doesn't exist.
int rv = NS_taccess(mFile.get(), F_OK);
if (rv) {
mSkip = 1;
mProgressCost = 0;
return OK;
}
LOG(("PREPARE REMOVEFILE " LOG_S, mRelPath.get()));
// Make sure that we're actually a file...
struct NS_tstat_t fileInfo;
rv = NS_tstat(mFile.get(), &fileInfo);
if (rv) {
LOG(("failed to read file status info: " LOG_S ", err: %d", mFile.get(),
errno));
return READ_ERROR;
}
if (!S_ISREG(fileInfo.st_mode)) {
LOG(("path present, but not a file: " LOG_S, mFile.get()));
return DELETE_ERROR_EXPECTED_FILE;
}
NS_tchar* slash = (NS_tchar*)NS_tstrrchr(mFile.get(), NS_T('/'));
if (slash) {
*slash = NS_T('\0');
rv = NS_taccess(mFile.get(), W_OK);
*slash = NS_T('/');
} else {
rv = NS_taccess(NS_T("."), W_OK);
}
if (rv) {
LOG(("access failed: %d", errno));
return WRITE_ERROR_FILE_ACCESS_DENIED;
}
return OK;
}
int RemoveFile::Execute() {
if (mSkip) {
return OK;
}
LOG(("EXECUTE REMOVEFILE " LOG_S, mRelPath.get()));
// The file is checked for existence here and in Prepare since it might have
int rv = NS_taccess(mFile.get(), F_OK);
if (rv) {
LOG(("file cannot be removed because it does not exist; skipping"));
mSkip = 1;
return OK;
}
if (sStagedUpdate) {
// Staged updates don't need backup files so just remove it.
rv = ensure_remove(mFile.get());
if (rv) {
return rv;
}
} else {
// Rename the old file. It will be removed in Finish.
rv = backup_create(mFile.get());
if (rv) {
LOG(("backup_create failed: %d", rv));
return rv;
}
}
return OK;
}
void RemoveFile::Finish(int status) {
if (mSkip) {
return;
}
LOG(("FINISH REMOVEFILE " LOG_S, mRelPath.get()));
// Staged updates don't create backup files.
if (!sStagedUpdate) {
backup_finish(mFile.get(), mRelPath.get(), status);
}
}
class RemoveDir : public Action {
public:
RemoveDir() : mSkip(0) {}
int Parse(NS_tchar* line) override;
int Prepare() override; // check that the source dir exists
int Execute() override;
void Finish(int status) override;
private:
mozilla::UniquePtr<NS_tchar[]> mDir;
mozilla::UniquePtr<NS_tchar[]> mRelPath;
int mSkip;
};
int RemoveDir::Parse(NS_tchar* line) {
// format "<deaddir>/"
NS_tchar* validPath = get_valid_path(&line, true);
if (!validPath) {
return PARSE_ERROR;
}
mRelPath = mozilla::MakeUnique<NS_tchar[]>(MAXPATHLEN);
NS_tstrcpy(mRelPath.get(), validPath);
mDir.reset(get_full_path(validPath));
if (!mDir) {
return PARSE_ERROR;
}
return OK;
}
int RemoveDir::Prepare() {
// We expect the directory to exist if we are to remove it.
int rv = NS_taccess(mDir.get(), F_OK);
if (rv) {
mSkip = 1;
mProgressCost = 0;
return OK;
}
LOG(("PREPARE REMOVEDIR " LOG_S "/", mRelPath.get()));
// Make sure that we're actually a dir.
struct NS_tstat_t dirInfo;
rv = NS_tstat(mDir.get(), &dirInfo);
if (rv) {
LOG(("failed to read directory status info: " LOG_S ", err: %d",
mRelPath.get(), errno));
return READ_ERROR;
}
if (!S_ISDIR(dirInfo.st_mode)) {
LOG(("path present, but not a directory: " LOG_S, mRelPath.get()));
return DELETE_ERROR_EXPECTED_DIR;
}
rv = NS_taccess(mDir.get(), W_OK);
if (rv) {
LOG(("access failed: %d, %d", rv, errno));
return WRITE_ERROR_DIR_ACCESS_DENIED;
}
return OK;
}
int RemoveDir::Execute() {
if (mSkip) {
return OK;
}
LOG(("EXECUTE REMOVEDIR " LOG_S "/", mRelPath.get()));
// The directory is checked for existence at every step since it might have
int rv = NS_taccess(mDir.get(), F_OK);
if (rv) {
LOG(("directory no longer exists; skipping"));
mSkip = 1;
}
return OK;
}
void RemoveDir::Finish(int status) {
if (mSkip || status != OK) {
return;
}
LOG(("FINISH REMOVEDIR " LOG_S "/", mRelPath.get()));
// The directory is checked for existence at every step since it might have
int rv = NS_taccess(mDir.get(), F_OK);
if (rv) {
LOG(("directory no longer exists; skipping"));
return;
}
if (status == OK) {
if (NS_trmdir(mDir.get())) {
LOG(("non-fatal error removing directory: " LOG_S "/, rv: %d, err: %d",
mRelPath.get(), rv, errno));
}
}
}
class AddFile : public Action {
public:
AddFile() : mAdded(false) {}
int Parse(NS_tchar* line) override;
int Prepare() override;
int Execute() override;
void Finish(int status) override;
private:
mozilla::UniquePtr<NS_tchar[]> mFile;
mozilla::UniquePtr<NS_tchar[]> mRelPath;
bool mAdded;
};
int AddFile::Parse(NS_tchar* line) {
// format "<newfile>"
NS_tchar* validPath = get_valid_path(&line);
if (!validPath) {
return PARSE_ERROR;
}
mRelPath = mozilla::MakeUnique<NS_tchar[]>(MAXPATHLEN);
NS_tstrcpy(mRelPath.get(), validPath);
mFile.reset(get_full_path(validPath));
if (!mFile) {
return PARSE_ERROR;
}
return OK;
}
int AddFile::Prepare() {
LOG(("PREPARE ADD " LOG_S, mRelPath.get()));
return OK;
}
int AddFile::Execute() {
LOG(("EXECUTE ADD " LOG_S, mRelPath.get()));
int rv;
// First make sure that we can actually get rid of any existing file.
rv = NS_taccess(mFile.get(), F_OK);
if (rv == 0) {
if (sStagedUpdate) {
// Staged updates don't need backup files so just remove it.
rv = ensure_remove(mFile.get());
} else {
rv = backup_create(mFile.get());
}
if (rv) {
return rv;
}
} else {
rv = ensure_parent_dir(mFile.get());
if (rv) {
return rv;
}
}
#ifdef XP_WIN
char sourcefile[MAXPATHLEN];
if (!WideCharToMultiByte(CP_UTF8, 0, mRelPath.get(), -1, sourcefile,
MAXPATHLEN, nullptr, nullptr)) {
LOG(("error converting wchar to utf8: %lu", GetLastError()));
return STRING_CONVERSION_ERROR;
}
rv = gArchiveReader.ExtractFile(sourcefile, mFile.get());
#else
rv = gArchiveReader.ExtractFile(mRelPath.get(), mFile.get());
#endif
if (!rv) {
mAdded = true;
}
return rv;
}
void AddFile::Finish(int status) {
LOG(("FINISH ADD " LOG_S, mRelPath.get()));
// Staged updates don't create backup files.
if (!sStagedUpdate) {
// When there is an update failure and a file has been added it is removed
// here since there might not be a backup to replace it.
if (status && mAdded) {
if (NS_tremove(mFile.get()) && errno != ENOENT) {
LOG(("non-fatal error after update failure removing added file: " LOG_S
", err: %d",
mFile.get(), errno));
}
}
backup_finish(mFile.get(), mRelPath.get(), status);
}
}
class PatchFile : public Action {
public:
PatchFile() : mPatchFile(nullptr), mPatchIndex(-1), buf(nullptr) {}
~PatchFile() override;
int Parse(NS_tchar* line) override;
int Prepare() override; // should check for patch file and for checksum here
int Execute() override;
void Finish(int status) override;
private:
int LoadSourceFile(FILE* ofile);
static int sPatchIndex;
const NS_tchar* mPatchFile;
mozilla::UniquePtr<NS_tchar[]> mFile;
mozilla::UniquePtr<NS_tchar[]> mFileRelPath;
int mPatchIndex;
MBSPatchHeader header;
unsigned char* buf;
NS_tchar spath[MAXPATHLEN];
AutoFile mPatchStream;
};
int PatchFile::sPatchIndex = 0;
PatchFile::~PatchFile() {
// Make sure mPatchStream gets unlocked on Windows; the system will do that,
// but not until some indeterminate future time, and we want determinism.
// Normally this happens at the end of Execute, when we close the stream;
// this call is here in case Execute errors out.
#ifdef XP_WIN
if (mPatchStream) {
UnlockFile((HANDLE)_get_osfhandle(fileno(mPatchStream)), 0, 0, -1, -1);
}
#endif
// Patch files are written to the <working_dir>/updating directory which is
// removed after the update has finished so don't delete patch files here.
if (buf) {
free(buf);
}
}
int PatchFile::LoadSourceFile(FILE* ofile) {
struct stat os;
int rv = fstat(fileno((FILE*)ofile), &os);
if (rv) {
LOG(("LoadSourceFile: unable to stat destination file: " LOG_S ", "
"err: %d",
mFileRelPath.get(), errno));
return READ_ERROR;
}
if (uint32_t(os.st_size) != header.slen) {
LOG(
("LoadSourceFile: destination file size %d does not match expected "
"size %d",
uint32_t(os.st_size), header.slen));
return LOADSOURCE_ERROR_WRONG_SIZE;
}
buf = (unsigned char*)malloc(header.slen);
if (!buf) {
return UPDATER_MEM_ERROR;
}
size_t r = header.slen;
unsigned char* rb = buf;
while (r) {
const size_t count = mmin(SSIZE_MAX, r);
size_t c = fread(rb, 1, count, ofile);
if (c != count) {
LOG(("LoadSourceFile: error reading destination file: " LOG_S,
mFileRelPath.get()));
return READ_ERROR;
}
r -= c;
rb += c;
}
// Verify that the contents of the source file correspond to what we expect.
unsigned int crc = crc32(buf, header.slen);
if (crc != header.scrc32) {
LOG(
("LoadSourceFile: destination file crc %d does not match expected "
"crc %d",
crc, header.scrc32));
return CRC_ERROR;
}
return OK;
}
int PatchFile::Parse(NS_tchar* line) {
// format "<patchfile>" "<filetopatch>"
// Get the path to the patch file inside of the mar
mPatchFile = mstrtok(kQuote, &line);
if (!mPatchFile) {
return PARSE_ERROR;
}
// consume whitespace between args
NS_tchar* q = mstrtok(kQuote, &line);
if (!q) {
return PARSE_ERROR;
}
NS_tchar* validPath = get_valid_path(&line);
if (!validPath) {
return PARSE_ERROR;
}
mFileRelPath = mozilla::MakeUnique<NS_tchar[]>(MAXPATHLEN);
NS_tstrcpy(mFileRelPath.get(), validPath);
mFile.reset(get_full_path(validPath));
if (!mFile) {
return PARSE_ERROR;
}
return OK;
}
int PatchFile::Prepare() {
LOG(("PREPARE PATCH " LOG_S, mFileRelPath.get()));
// extract the patch to a temporary file
mPatchIndex = sPatchIndex++;
NS_tsnprintf(spath, sizeof(spath) / sizeof(spath[0]),
NS_T("%s/updating/%d.patch"), gWorkingDirPath, mPatchIndex);
// The removal of pre-existing patch files here is in case a previous update
// crashed and left these files behind.
if (NS_tremove(spath) && errno != ENOENT) {
LOG(("failure removing pre-existing patch file: " LOG_S ", err: %d", spath,
errno));
return WRITE_ERROR;
}
mPatchStream = NS_tfopen(spath, NS_T("wb+"));
if (!mPatchStream) {
return WRITE_ERROR;
}
#ifdef XP_WIN
// Lock the patch file, so it can't be messed with between
// when we're done creating it and when we go to apply it.
if (!LockFile((HANDLE)_get_osfhandle(fileno(mPatchStream)), 0, 0, -1, -1)) {
LOG(("Couldn't lock patch file: %lu", GetLastError()));
return LOCK_ERROR_PATCH_FILE;
}
char sourcefile[MAXPATHLEN];
if (!WideCharToMultiByte(CP_UTF8, 0, mPatchFile, -1, sourcefile, MAXPATHLEN,
nullptr, nullptr)) {
LOG(("error converting wchar to utf8: %lu", GetLastError()));
return STRING_CONVERSION_ERROR;
}
int rv = gArchiveReader.ExtractFileToStream(sourcefile, mPatchStream);
#else
int rv = gArchiveReader.ExtractFileToStream(mPatchFile, mPatchStream);
#endif
return rv;
}
int PatchFile::Execute() {
LOG(("EXECUTE PATCH " LOG_S, mFileRelPath.get()));
fseek(mPatchStream, 0, SEEK_SET);
int rv = MBS_ReadHeader(mPatchStream, &header);
if (rv) {
return rv;
}
FILE* origfile = nullptr;
#ifdef XP_WIN
if (NS_tstrcmp(mFileRelPath.get(), gCallbackRelPath) == 0) {
// Read from the copy of the callback when patching since the callback can't
// be opened for reading to prevent the application from being launched.
origfile = NS_tfopen(gCallbackBackupPath, NS_T("rb"));
} else {
origfile = NS_tfopen(mFile.get(), NS_T("rb"));
}
#else
origfile = NS_tfopen(mFile.get(), NS_T("rb"));
#endif
if (!origfile) {
LOG(("unable to open destination file: " LOG_S ", err: %d",
mFileRelPath.get(), errno));
return READ_ERROR;
}
rv = LoadSourceFile(origfile);
fclose(origfile);
if (rv) {
LOG(("LoadSourceFile failed"));
return rv;
}
// Rename the destination file if it exists before proceeding so it can be
// used to restore the file to its original state if there is an error.
struct NS_tstat_t ss;
rv = NS_tstat(mFile.get(), &ss);
if (rv) {
LOG(("failed to read file status info: " LOG_S ", err: %d",
mFileRelPath.get(), errno));
return READ_ERROR;
}
// Staged updates don't need backup files.
if (!sStagedUpdate) {
rv = backup_create(mFile.get());
if (rv) {
return rv;
}
}
#if defined(HAVE_POSIX_FALLOCATE)
AutoFile ofile(ensure_open(mFile.get(), NS_T("wb+"), ss.st_mode));
posix_fallocate(fileno((FILE*)ofile), 0, header.dlen);
#elif defined(XP_WIN)
bool shouldTruncate = true;
// Creating the file, setting the size, and then closing the file handle
// lessens fragmentation more than any other method tested. Other methods that
// have been tested are:
// 1. _chsize / _chsize_s reduced fragmentation though not completely.
// 2. _get_osfhandle and then setting the size reduced fragmentation though
// not completely. There are also reports of _get_osfhandle failing on
// mingw.
HANDLE hfile = CreateFileW(mFile.get(), GENERIC_WRITE, 0, nullptr,
CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, nullptr);
if (hfile != INVALID_HANDLE_VALUE) {
if (SetFilePointer(hfile, header.dlen, nullptr, FILE_BEGIN) !=
INVALID_SET_FILE_POINTER &&
SetEndOfFile(hfile) != 0) {
shouldTruncate = false;
}
CloseHandle(hfile);
}
AutoFile ofile(ensure_open(
mFile.get(), shouldTruncate ? NS_T("wb+") : NS_T("rb+"), ss.st_mode));
#elif defined(XP_MACOSX)
AutoFile ofile(ensure_open(mFile.get(), NS_T("wb+"), ss.st_mode));
// Modified code from FileUtils.cpp
fstore_t store = {F_ALLOCATECONTIG, F_PEOFPOSMODE, 0, header.dlen};
// Try to get a continous chunk of disk space
rv = fcntl(fileno((FILE*)ofile), F_PREALLOCATE, &store);
if (rv == -1) {
// OK, perhaps we are too fragmented, allocate non-continuous
store.fst_flags = F_ALLOCATEALL;
rv = fcntl(fileno((FILE*)ofile), F_PREALLOCATE, &store);
}
if (rv != -1) {
ftruncate(fileno((FILE*)ofile), header.dlen);
}
#else
AutoFile ofile(ensure_open(mFile.get(), NS_T("wb+"), ss.st_mode));
#endif
if (ofile == nullptr) {
LOG(("unable to create new file: " LOG_S ", err: %d", mFileRelPath.get(),
errno));
return WRITE_ERROR_OPEN_PATCH_FILE;
}
#ifdef XP_WIN
if (!shouldTruncate) {
fseek(ofile, 0, SEEK_SET);
}
#endif
rv = MBS_ApplyPatch(&header, mPatchStream, buf, ofile);
// Go ahead and do a bit of cleanup now to minimize runtime overhead.
// Make sure mPatchStream gets unlocked on Windows; the system will do that,
// but not until some indeterminate future time, and we want determinism.
#ifdef XP_WIN
UnlockFile((HANDLE)_get_osfhandle(fileno(mPatchStream)), 0, 0, -1, -1);
#endif
// Set mPatchStream to nullptr to make AutoFile close the file,
// so it can be deleted on Windows.
mPatchStream = nullptr;
// Patch files are written to the <working_dir>/updating directory which is
// removed after the update has finished so don't delete patch files here.
spath[0] = NS_T('\0');
free(buf);
buf = nullptr;
return rv;
}
void PatchFile::Finish(int status) {
LOG(("FINISH PATCH " LOG_S, mFileRelPath.get()));
// Staged updates don't create backup files.
if (!sStagedUpdate) {
backup_finish(mFile.get(), mFileRelPath.get(), status);
}
}
class AddIfFile : public AddFile {
public:
int Parse(NS_tchar* line) override;
int Prepare() override;
int Execute() override;
void Finish(int status) override;
protected:
mozilla::UniquePtr<NS_tchar[]> mTestFile;
};
int AddIfFile::Parse(NS_tchar* line) {
// format "<testfile>" "<newfile>"
mTestFile.reset(get_full_path(get_valid_path(&line)));
if (!mTestFile) {
return PARSE_ERROR;
}
// consume whitespace between args
NS_tchar* q = mstrtok(kQuote, &line);
if (!q) {
return PARSE_ERROR;
}
return AddFile::Parse(line);
}
int AddIfFile::Prepare() {
// If the test file does not exist, then skip this action.
if (NS_taccess(mTestFile.get(), F_OK)) {
mTestFile = nullptr;
return OK;
}
return AddFile::Prepare();
}
int AddIfFile::Execute() {
if (!mTestFile) {
return OK;
}
return AddFile::Execute();
}
void AddIfFile::Finish(int status) {
if (!mTestFile) {
return;
}
AddFile::Finish(status);
}
class AddIfNotFile : public AddFile {
public:
int Parse(NS_tchar* line) override;
int Prepare() override;
int Execute() override;
void Finish(int status) override;
protected:
mozilla::UniquePtr<NS_tchar[]> mTestFile;
};
int AddIfNotFile::Parse(NS_tchar* line) {
// format "<testfile>" "<newfile>"
mTestFile.reset(get_full_path(get_valid_path(&line)));
if (!mTestFile) {
return PARSE_ERROR;
}
// consume whitespace between args
NS_tchar* q = mstrtok(kQuote, &line);
if (!q) {
return PARSE_ERROR;
}
return AddFile::Parse(line);
}
int AddIfNotFile::Prepare() {
// If the test file exists, then skip this action.
if (!NS_taccess(mTestFile.get(), F_OK)) {
mTestFile = NULL;
return OK;
}
return AddFile::Prepare();
}
int AddIfNotFile::Execute() {
if (!mTestFile) {
return OK;
}
return AddFile::Execute();
}
void AddIfNotFile::Finish(int status) {
if (!mTestFile) {
return;
}
AddFile::Finish(status);
}
class PatchIfFile : public PatchFile {
public:
int Parse(NS_tchar* line) override;
int Prepare() override; // should check for patch file and for checksum here
int Execute() override;
void Finish(int status) override;
private:
mozilla::UniquePtr<NS_tchar[]> mTestFile;
};
int PatchIfFile::Parse(NS_tchar* line) {
// format "<testfile>" "<patchfile>" "<filetopatch>"
mTestFile.reset(get_full_path(get_valid_path(&line)));
if (!mTestFile) {
return PARSE_ERROR;
}
// consume whitespace between args
NS_tchar* q = mstrtok(kQuote, &line);
if (!q) {
return PARSE_ERROR;
}
return PatchFile::Parse(line);
}
int PatchIfFile::Prepare() {
// If the test file does not exist, then skip this action.
if (NS_taccess(mTestFile.get(), F_OK)) {
mTestFile = nullptr;
return OK;
}
return PatchFile::Prepare();
}
int PatchIfFile::Execute() {
if (!mTestFile) {
return OK;
}
return PatchFile::Execute();
}
void PatchIfFile::Finish(int status) {
if (!mTestFile) {
return;
}
PatchFile::Finish(status);
}
//-----------------------------------------------------------------------------
#ifdef XP_WIN
# include "nsWindowsRestart.cpp"
# include "nsWindowsHelpers.h"
# include "uachelper.h"
# ifdef MOZ_MAINTENANCE_SERVICE
# include "pathhash.h"
# endif
/**
* Launch the post update application (helper.exe). It takes in the path of the
* callback application to calculate the path of helper.exe. For service updates
* this is called from both the system account and the current user account.
*
* @param installationDir The path to the callback application binary.
* @param updateInfoDir The directory where update info is stored.
* @return true if there was no error starting the process.
*/
bool LaunchWinPostProcess(const WCHAR* installationDir,
const WCHAR* updateInfoDir) {
WCHAR workingDirectory[MAX_PATH + 1] = {L'\0'};
wcsncpy(workingDirectory, installationDir, MAX_PATH);
// Launch helper.exe to perform post processing (e.g. registry and log file
// modifications) for the update.
WCHAR inifile[MAX_PATH + 1] = {L'\0'};
wcsncpy(inifile, installationDir, MAX_PATH);
if (!PathAppendSafe(inifile, L"updater.ini")) {
LOG(
("LaunchWinPostProcess failed because PathAppendSafe failed when "
"getting INI path"));
return false;
}
WCHAR exefile[MAX_PATH + 1];
WCHAR exearg[MAX_PATH + 1];
if (!GetPrivateProfileStringW(L"PostUpdateWin", L"ExeRelPath", nullptr,
exefile, MAX_PATH + 1, inifile)) {
LOG(("LaunchWinPostProcess failed due to failure to retrieve ExeRelPath"));
return false;
}
if (!GetPrivateProfileStringW(L"PostUpdateWin", L"ExeArg", nullptr, exearg,
MAX_PATH + 1, inifile)) {
LOG(("LaunchWinPostProcess failed due to failure to retrieve ExeArg"));
return false;
}
// The relative path must not contain directory traversals, current directory,
// or colons.
if (wcsstr(exefile, L"..") != nullptr || wcsstr(exefile, L"./") != nullptr ||
wcsstr(exefile, L".\\") != nullptr || wcsstr(exefile, L":") != nullptr) {
LOG(
("LaunchWinPostProcess failed because executable path contains "
"disallowed characters"));
return false;
}
// The relative path must not start with a decimal point, backslash, or
// forward slash.
if (exefile[0] == L'.' || exefile[0] == L'\\' || exefile[0] == L'/') {
LOG(("LaunchWinPostProcess failed because first character is invalid"));
return false;
}
WCHAR exefullpath[MAX_PATH + 1] = {L'\0'};
wcsncpy(exefullpath, installationDir, MAX_PATH);
if (!PathAppendSafe(exefullpath, exefile)) {
LOG(
("LaunchWinPostProcess failed because PathAppendSafe failed when "
"getting full executable path"));
return false;
}
if (!IsValidFullPath(exefullpath)) {
LOG(
("LaunchWinPostProcess failed because executable path is not a valid, "
"full path"));
return false;
}
# if !defined(TEST_UPDATER) && defined(MOZ_MAINTENANCE_SERVICE)
if (sUsingService &&
!DoesBinaryMatchAllowedCertificates(installationDir, exefullpath)) {
LOG(
("LaunchWinPostProcess failed because the binary doesn't match the "
"allowed certificates"));
return false;
}
# endif
WCHAR dlogFile[MAX_PATH + 1];
if (!PathGetSiblingFilePath(dlogFile, exefullpath, L"uninstall.update")) {
LOG(("LaunchWinPostProcess failed because dlogFile path is unavailable"));
return false;
}
WCHAR slogFile[MAX_PATH + 1] = {L'\0'};
if (gCopyOutputFiles) {
if (!GetSecureOutputFilePath(gPatchDirPath, L".log", slogFile)) {
LOG(
("LaunchWinPostProcess failed because a secure slogFile path is "
"unavailable"));
return false;
}
} else {
wcsncpy(slogFile, updateInfoDir, MAX_PATH);
if (!PathAppendSafe(slogFile, UpdateLogFilename())) {
LOG(("LaunchWinPostProcess failed because slogFile path is unavailable"));
return false;
}
}
WCHAR dummyArg[14] = {L'\0'};
wcsncpy(dummyArg, L"argv0ignored ",
sizeof(dummyArg) / sizeof(dummyArg[0]) - 1);
size_t len = wcslen(exearg) + wcslen(dummyArg);
WCHAR* cmdline = (WCHAR*)malloc((len + 1) * sizeof(WCHAR));
if (!cmdline) {
LOG(
("LaunchWinPostProcess failed due to failure to allocate %zu wchars "
"for cmdline",
len + 1));
return false;
}
wcsncpy(cmdline, dummyArg, len);
wcscat(cmdline, exearg);
// We want to launch the post update helper app to update the Windows
// registry even if there is a failure with removing the uninstall.update
// file or copying the update.log file.
CopyFileW(slogFile, dlogFile, false);
STARTUPINFOW si = {sizeof(si), 0};
si.lpDesktop = const_cast<LPWSTR>(L""); // -Wwritable-strings
PROCESS_INFORMATION pi = {0};
// Invoke post-update with a minimal environment to avoid environment
// variables intended to relaunch Firefox impacting post-update operations, in
// particular background tasks. The updater will invoke the callback
// application with the current (non-minimal) environment.
//
// N.b.: two null terminating characters! The first terminates a non-existent
// key-value pair, the second (automatically added) terminates the block of
// key-value pairs.
const WCHAR* emptyEnvironment = L"\0";
bool ok =
CreateProcessW(exefullpath, cmdline,
nullptr, // no special security attributes
nullptr, // no special thread attributes
false, // don't inherit filehandles
0, // No special process creation flags
(LPVOID)emptyEnvironment, workingDirectory, &si, &pi);
free(cmdline);
if (ok) {
LOG(("LaunchWinPostProcess - Waiting for process to complete"));
WaitForSingleObject(pi.hProcess, INFINITE);
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
LOG(("LaunchWinPostProcess - Process completed"));
} else {
LOG(("LaunchWinPostProcess - CreateProcessW failed: %lu", GetLastError()));
}
return ok;
}
#endif
static void LaunchCallbackApp(const NS_tchar* workingDir, int argc,
NS_tchar** argv, bool usingService) {
putenv(const_cast<char*>("MOZ_LAUNCHED_CHILD=1"));
if (NS_tchdir(workingDir) != 0) {
LOG(("Warning: chdir failed"));
}
#if defined(USE_EXECV)
execv(argv[0], argv);
#elif defined(XP_MACOSX)
LaunchMacApp(argc, (const char**)argv);
#elif defined(XP_WIN)
// Do not allow the callback to run when running an update through the
// service as session 0. The unelevated updater.exe will do the launching.
if (!usingService) {
HANDLE hProcess;
if (WinLaunchChild(argv[0], argc, argv, nullptr, &hProcess)) {
// Keep the current process around until the callback process has created
// its message queue, to avoid the launched process's windows being forced
// into the background.
mozilla::WaitForInputIdle(hProcess);
CloseHandle(hProcess);
}
}
#else
# warning "Need implementaton of LaunchCallbackApp"
#endif
}
static bool WriteToFile(const NS_tchar* aFilename, const char* aStatus) {
LOG(("Writing status to file: %s", aStatus));
NS_tchar statusFilePath[MAXPATHLEN + 1] = {NS_T('\0')};
#if defined(XP_WIN)
if (gUseSecureOutputPath) {
if (!GetSecureOutputFilePath(gPatchDirPath, L".status", statusFilePath)) {
LOG(("WriteToFile failed to get secure output path"));
return false;
}
} else {
NS_tsnprintf(statusFilePath,
sizeof(statusFilePath) / sizeof(statusFilePath[0]),
NS_T("%s\\%s"), gPatchDirPath, aFilename);
}
#else
NS_tsnprintf(statusFilePath,
sizeof(statusFilePath) / sizeof(statusFilePath[0]),
NS_T("%s/%s"), gPatchDirPath, aFilename);
// Make sure that the directory for the update status file exists
if (ensure_parent_dir(statusFilePath)) {
LOG(("WriteToFile failed to ensure parent directory's existence"));
return false;
}
#endif
AutoFile statusFile(NS_tfopen(statusFilePath, NS_T("wb+")));
if (statusFile == nullptr) {
LOG(("WriteToFile failed to open status file: %d", errno));
return false;
}
if (fwrite(aStatus, strlen(aStatus), 1, statusFile) != 1) {
LOG(("WriteToFile failed to write to status file: %d", errno));
return false;
}
#if defined(XP_WIN)
if (gUseSecureOutputPath) {
// This is done after the update status file has been written so if the
// write to the update status file fails an existing update status file
// won't be used.
if (!WriteSecureIDFile(gPatchDirPath)) {
LOG(("WriteToFile failed to write secure ID file"));
return false;
}
}
#endif
return true;
}
/**
* Writes a string to the update.status file.
*
* NOTE: All calls to WriteStatusFile MUST happen before calling output_finish
* because the output_finish function copies the update status file for
* the elevated updater and writing the status file after calling
* output_finish will overwrite it.
*
* @param aStatus
* The string to write to the update.status file.
* @return true on success.
*/
static bool WriteStatusFile(const char* aStatus) {
return WriteToFile(NS_T("update.status"), aStatus);
}
/**
* Writes a string to the update.status file based on the status param.
*
* NOTE: All calls to WriteStatusFile MUST happen before calling output_finish
* because the output_finish function copies the update status file for
* the elevated updater and writing the status file after calling
* output_finish will overwrite it.
*
* @param status
* A status code used to determine what string to write to the
* update.status file (see code).
*/
static void WriteStatusFile(int status) {
const char* text;
char buf[32];
if (status == OK) {
if (sStagedUpdate) {
text = "applied\n";
} else {
text = "succeeded\n";
}
} else {
snprintf(buf, sizeof(buf) / sizeof(buf[0]), "failed: %d\n", status);
text = buf;
}
WriteStatusFile(text);
}
#if defined(XP_WIN)
/*
* Parses the passed contents of an update status file and checks if the
* contained status matches the expected status.
*
* @param statusString The status file contents.
* @param expectedStatus The status to compare the update status file's
* contents against.
* @param errorCode Optional out parameter. If a pointer is passed and the
* update status file contains an error code, the code
* will be returned via the out parameter. If a pointer is
* passed and the update status file does not contain an error
* code, or any error code after the status could not be
* parsed, mozilla::Nothing will be returned via this
* parameter.
* @return true if the status is set to the value indicated by expectedStatus.
*/
static bool UpdateStatusIs(const char* statusString, const char* expectedStatus,
mozilla::Maybe<int>* errorCode = nullptr) {
if (errorCode) {
*errorCode = mozilla::Nothing();
}
// Parse the update status file. Expected format is:
// Update status string
// Optionally followed by:
// Colon character (':')
// Space character (' ')
// Integer error code
// Newline character
const char* statusEnd = strchr(statusString, ':');
if (statusEnd == nullptr) {
statusEnd = strchr(statusString, '\n');
}
if (statusEnd == nullptr) {
statusEnd = strchr(statusString, '\0');
}
size_t statusLen = statusEnd - statusString;
size_t expectedStatusLen = strlen(expectedStatus);
bool statusMatch =
statusLen == expectedStatusLen &&
strncmp(statusString, expectedStatus, expectedStatusLen) == 0;
// We only need to continue parsing if (a) there is a place to store the error
// code if we parse it, and (b) there is a status code to parse. If the status
// string didn't end with a ':', there won't be an error code after it.
if (!errorCode || *statusEnd != ':') {
return statusMatch;
}
const char* errorCodeStart = statusEnd + 1;
char* errorCodeEnd = nullptr;
// strtol skips an arbitrary number of leading whitespace characters. This
// technically allows us to successfully consume slightly misformatted status
// files, since the expected format is for there to be a single space only.
long longErrorCode = strtol(errorCodeStart, &errorCodeEnd, 10);
if (errorCodeEnd != errorCodeStart && longErrorCode < INT_MAX &&
longErrorCode > INT_MIN) {
// We don't allow equality with INT_MAX/INT_MIN for two reasons. It could
// be that, on this platform, INT_MAX/INT_MIN equal LONG_MAX/LONG_MIN, which
// is what strtol gives us if the parsed value was out of bounds. And those
// values are already way, way outside the set of valid update error codes
// anyways.
errorCode->emplace(static_cast<int>(longErrorCode));
}
return statusMatch;
}
/*
* Reads the secure update status file and sets statusMatch to true if the
* status matches the expected status that was passed.
*
* @param expectedStatus The status to compare the update status file's
* contents against.
* @param statusMatch Out parameter for specifying if the status is set to
* the value indicated by expectedStatus
* @param errorCode Optional out parameter. If a pointer is passed and the
* update status file contains an error code, the code
* will be returned via the out parameter. If a pointer is
* passed and the update status file does not contain an error
* code, or any error code after the status could not be
* parsed, mozilla::Nothing will be returned via this
* parameter.
* @return true if the information was retrieved successfully.
*/
static bool CompareSecureUpdateStatus(
const char* expectedStatus, bool& statusMatch,
mozilla::Maybe<int>* errorCode = nullptr) {
NS_tchar statusFilePath[MAX_PATH + 1] = {L'\0'};
if (!GetSecureOutputFilePath(gPatchDirPath, L".status", statusFilePath)) {
LOG(
("CompareSecureUpdateStatus failed due to GetSecureOutputFilePath "
"failure"));
return false;
}
AutoFile file(NS_tfopen(statusFilePath, NS_T("rb")));
if (file == nullptr) {
LOG(("CompareSecureUpdateStatus failed to open the secure status file: %d",
errno));
return false;
}
const size_t bufferLength = 32;
char buf[bufferLength] = {0};
size_t charsRead = fread(buf, sizeof(buf[0]), bufferLength - 1, file);
if (ferror(file)) {
LOG(("CompareSecureUpdateStatus failed to read status file"));
return false;
}
buf[charsRead] = '\0';
statusMatch = UpdateStatusIs(buf, expectedStatus, errorCode);
LOG(("CompareSecureUpdateStatus %s %s %s", buf,
statusMatch ? "matches" : "does not match", expectedStatus));
return true;
}
/*
* Reads the secure update status file and sets isSucceeded to true if the
* status is set to succeeded.
*
* @param isSucceeded Out parameter for specifying if the status
* is set to succeeded or not.
* @return true if the information was retrieved successfully.
*/
static bool IsSecureUpdateStatusSucceeded(bool& isSucceeded) {
return CompareSecureUpdateStatus("succeeded", isSucceeded);
}
#endif
#ifdef MOZ_MAINTENANCE_SERVICE
/*
* Read the update.status file and sets isPendingService to true if
* the status is set to pending-service.
*
* @param isPendingService Out parameter for specifying if the status
* is set to pending-service or not.
* @return true if the information was retrieved and it is pending
* or pending-service.
*/
static bool IsUpdateStatusPendingService() {
NS_tchar filename[MAXPATHLEN];
NS_tsnprintf(filename, sizeof(filename) / sizeof(filename[0]),
NS_T("%s/update.status"), gPatchDirPath);
AutoFile file(NS_tfopen(filename, NS_T("rb")));
if (file == nullptr) {
return false;
}
const size_t bufferLength = 32;
char buf[bufferLength] = {0};
size_t charsRead = fread(buf, sizeof(buf[0]), bufferLength - 1, file);
if (ferror(file)) {
return false;
}
buf[charsRead] = '\0';
return UpdateStatusIs(buf, "pending-service") ||
UpdateStatusIs(buf, "applied-service");
}
/*
* Reads the secure update status file and sets isFailed to true if the
* status is set to failed.
*
* @param isFailed Out parameter for specifying if the status
* is set to failed or not.
* @param errorCode Optional out parameter. If a pointer is passed and the
* update status file contains an error code, the code
* will be returned via the out parameter. If a pointer is
* passed and the update status file does not contain an error
* code, or any error code after the status could not be
* parsed, mozilla::Nothing will be returned via this
* parameter.
* @return true if the information was retrieved successfully.
*/
static bool IsSecureUpdateStatusFailed(
bool& isFailed, mozilla::Maybe<int>* errorCode = nullptr) {
return CompareSecureUpdateStatus("failed", isFailed, errorCode);
}
/**
* This function determines whether the error represented by the passed error
* code could potentially be recovered from or bypassed by updating without
* using the Maintenance Service (i.e. by showing a UAC prompt).
* We don't really want to show a UAC prompt, but it's preferable over the
* manual update doorhanger
*
* @param errorCode An integer error code from the update.status file. Should
* be one of the codes enumerated in updatererrors.h.
* @returns true if the code represents a Maintenance Service specific error.
* Otherwise, false.
*/
static bool IsServiceSpecificErrorCode(int errorCode) {
return ((errorCode >= 24 && errorCode <= 33) ||
(errorCode >= 49 && errorCode <= 58));
}
#endif
/*
* Copy the entire contents of the application installation directory to the
* destination directory for the update process.
*
* @return 0 if successful, an error code otherwise.
*/
static int CopyInstallDirToDestDir() {
// These files should not be copied over to the updated app
#ifdef XP_WIN
# define SKIPLIST_COUNT 3
#elif XP_MACOSX
# define SKIPLIST_COUNT 0
#else
# define SKIPLIST_COUNT 2
#endif
copy_recursive_skiplist<SKIPLIST_COUNT> skiplist;
#ifndef XP_MACOSX
skiplist.append(0, gInstallDirPath, NS_T("updated"));
skiplist.append(1, gInstallDirPath, NS_T("updates/0"));
# ifdef XP_WIN
skiplist.append(2, gInstallDirPath, NS_T("updated.update_in_progress.lock"));
# endif
#endif
return ensure_copy_recursive(gInstallDirPath, gWorkingDirPath, skiplist);
}
/*
* Replace the application installation directory with the destination
* directory in order to finish a staged update task
*
* @return 0 if successful, an error code otherwise.
*/
static int ProcessReplaceRequest() {
// The replacement algorithm is like this:
// 1. Move destDir to tmpDir. In case of failure, abort.
// 2. Move newDir to destDir. In case of failure, revert step 1 and abort.
// 3. Delete tmpDir (or defer it to the next reboot).
#ifdef XP_MACOSX
NS_tchar destDir[MAXPATHLEN];
NS_tsnprintf(destDir, sizeof(destDir) / sizeof(destDir[0]),
NS_T("%s/Contents"), gInstallDirPath);
#elif XP_WIN
// Windows preserves the case of the file/directory names. We use the
// GetLongPathName API in order to get the correct case for the directory
// name, so that if the user has used a different case when launching the
// application, the installation directory's name does not change.
NS_tchar destDir[MAXPATHLEN];
if (!GetLongPathNameW(gInstallDirPath, destDir,
sizeof(destDir) / sizeof(destDir[0]))) {
return NO_INSTALLDIR_ERROR;
}
#else
NS_tchar* destDir = gInstallDirPath;
#endif
NS_tchar tmpDir[MAXPATHLEN];
NS_tsnprintf(tmpDir, sizeof(tmpDir) / sizeof(tmpDir[0]), NS_T("%s.bak"),
destDir);
NS_tchar newDir[MAXPATHLEN];
NS_tsnprintf(newDir, sizeof(newDir) / sizeof(newDir[0]),
#ifdef XP_MACOSX
NS_T("%s/Contents"), gWorkingDirPath);
#else
NS_T("%s.bak/updated"), gInstallDirPath);
#endif
// First try to remove the possibly existing temp directory, because if this
// directory exists, we will fail to rename destDir.
// No need to error check here because if this fails, we will fail in the
// next step anyways.
ensure_remove_recursive(tmpDir);
LOG(("Begin moving destDir (" LOG_S ") to tmpDir (" LOG_S ")", destDir,
tmpDir));
int rv = rename_file(destDir, tmpDir, true);
#ifdef XP_WIN
// On Windows, if Firefox is launched using the shortcut, it will hold a
// handle to its installation directory open, which might not get released in
// time. Therefore we wait a little bit here to see if the handle is released.
// If it's not released, we just fail to perform the replace request.
const int max_retries = 10;
int retries = 0;
while (rv == WRITE_ERROR && (retries++ < max_retries)) {
LOG(
("PerformReplaceRequest: destDir rename attempt %d failed. "
"File: " LOG_S ". Last error: %lu, err: %d",
retries, destDir, GetLastError(), rv));
Sleep(100);
rv = rename_file(destDir, tmpDir, true);
}
#endif
if (rv) {
// The status file will have 'pending' written to it so there is no value in
// returning an error specific for this failure.
LOG(("Moving destDir to tmpDir failed, err: %d", rv));
return rv;
}
LOG(("Begin moving newDir (" LOG_S ") to destDir (" LOG_S ")", newDir,
destDir));
rv = rename_file(newDir, destDir, true);
#ifdef XP_MACOSX
if (rv) {
LOG(("Moving failed. Begin copying newDir (" LOG_S ") to destDir (" LOG_S
")",
newDir, destDir));
copy_recursive_skiplist<0> skiplist;
rv = ensure_copy_recursive(newDir, destDir, skiplist);
}
#endif
if (rv) {
LOG(("Moving newDir to destDir failed, err: %d", rv));
LOG(("Now, try to move tmpDir back to destDir"));
ensure_remove_recursive(destDir);
int rv2 = rename_file(tmpDir, destDir, true);
if (rv2) {
LOG(("Moving tmpDir back to destDir failed, err: %d", rv2));
}
// The status file will be have 'pending' written to it so there is no value
// in returning an error specific for this failure.
return rv;
}
#if !defined(XP_WIN) && !defined(XP_MACOSX)
// Platforms that have their updates directory in the installation directory
// need to have the last-update.log and backup-update.log files moved from the
// old installation directory to the new installation directory.
NS_tchar tmpLog[MAXPATHLEN];
NS_tsnprintf(tmpLog, sizeof(tmpLog) / sizeof(tmpLog[0]),
NS_T("%s/updates/last-update.log"), tmpDir);
if (!NS_taccess(tmpLog, F_OK)) {
NS_tchar destLog[MAXPATHLEN];
NS_tsnprintf(destLog, sizeof(destLog) / sizeof(destLog[0]),
NS_T("%s/updates/last-update.log"), destDir);
if (NS_tremove(destLog) && errno != ENOENT) {
LOG(("non-fatal error removing log file: " LOG_S ", err: %d", destLog,
errno));
}
NS_trename(tmpLog, destLog);
}
#endif
LOG(("Now, remove the tmpDir"));
rv = ensure_remove_recursive(tmpDir, true);
if (rv) {
LOG(("Removing tmpDir failed, err: %d", rv));
#ifdef XP_WIN
NS_tchar deleteDir[MAXPATHLEN];
NS_tsnprintf(deleteDir, sizeof(deleteDir) / sizeof(deleteDir[0]),
NS_T("%s\\%s"), destDir, DELETE_DIR);
// Attempt to remove the tobedeleted directory and then recreate it if it
// was successfully removed.
_wrmdir(deleteDir);
if (NS_taccess(deleteDir, F_OK)) {
NS_tmkdir(deleteDir, 0755);
}
remove_recursive_on_reboot(tmpDir, deleteDir);
#endif
}
#ifdef XP_MACOSX
// On OS X, we we need to remove the staging directory after its Contents
// directory has been moved.
NS_tchar updatedAppDir[MAXPATHLEN];
NS_tsnprintf(updatedAppDir, sizeof(updatedAppDir) / sizeof(updatedAppDir[0]),
NS_T("%s/Updated.app"), gPatchDirPath);
ensure_remove_recursive(updatedAppDir);
#endif
gSucceeded = true;
return 0;
}
#if defined(XP_WIN) && defined(MOZ_MAINTENANCE_SERVICE)
static void WaitForServiceFinishThread(void* param) {
// We wait at most 10 minutes, we already waited 5 seconds previously
// before deciding to show this UI.
WaitForServiceStop(SVC_NAME, 595);
QuitProgressUI();
}
#endif
#ifdef MOZ_VERIFY_MAR_SIGNATURE
# ifndef XP_MACOSX
/**
* This function reads in the ACCEPTED_MAR_CHANNEL_IDS from update-settings.ini
*
* @param aPath The path to the ini file that is to be read
* @param aResults A pointer to the location to store the read strings
* @return OK on success
*/
static int ReadMARChannelIDsFromPath(const NS_tchar* aPath,
MARChannelStringTable* aResults) {
const unsigned int kNumStrings = 1;
const char* kUpdaterKeys = "ACCEPTED_MAR_CHANNEL_IDS\0";
return ReadStrings(aPath, kUpdaterKeys, kNumStrings, &aResults->MARChannelID,
"Settings");
}
# else // XP_MACOSX
/**
* This function reads in the ACCEPTED_MAR_CHANNEL_IDS from a string buffer.
*
* @param aChannels A string buffer containing the MAR channel(s).
* @param aResults A pointer to the location to store the read strings.
* @return OK on success
*/
static int ReadMARChannelIDsFromBuffer(char* aChannels,
MARChannelStringTable* aResults) {
const unsigned int kNumStrings = 1;
const char* kUpdaterKeys = "ACCEPTED_MAR_CHANNEL_IDS\0";
return ReadStringsFromBuffer(aChannels, kUpdaterKeys, kNumStrings,
&aResults->MARChannelID, "Settings");
}
# endif // XP_MACOSX
/**
* This function reads in the `ACCEPTED_MAR_CHANNEL_IDS` from the appropriate
* (platform-dependent) source and populates `gMARStrings`.
*
* @return
* `OK` on success, `UPDATE_SETTINGS_FILE_CHANNEL` on failure.
*/
static int PopulategMARStrings() {
int rv = UPDATE_SETTINGS_FILE_CHANNEL;
# ifdef XP_MACOSX
if (gIsElevated) {
// An elevated update process will have already populated gMARStrings when
// it connected to the unelevated update process to obtain the command line
// args. See `ObtainUpdaterArguments`.
rv = OK;
} else if (auto marChannels =
UpdateSettingsUtil::GetAcceptedMARChannelsValue()) {
rv = ReadMARChannelIDsFromBuffer(marChannels->data(), &gMARStrings);
}
# else
NS_tchar updateSettingsPath[MAXPATHLEN];
NS_tsnprintf(updateSettingsPath,
sizeof(updateSettingsPath) / sizeof(updateSettingsPath[0]),
NS_T("%s/update-settings.ini"), gInstallDirPath);
rv = ReadMARChannelIDsFromPath(updateSettingsPath, &gMARStrings);
# endif
return rv == OK ? OK : UPDATE_SETTINGS_FILE_CHANNEL;
}
#endif // MOZ_VERIFY_MAR_SIGNATURE
static int GetUpdateFileName(NS_tchar* fileName, int maxChars) {
NS_tsnprintf(fileName, maxChars, NS_T("%s/update.mar"), gPatchDirPath);
return OK;
}
static void UpdateThreadFunc(void* param) {
// open ZIP archive and process...
int rv;
if (sReplaceRequest) {
rv = ProcessReplaceRequest();
} else {
NS_tchar dataFile[MAXPATHLEN];
rv = GetUpdateFileName(dataFile, sizeof(dataFile) / sizeof(dataFile[0]));
if (rv == OK) {
rv = gArchiveReader.Open(dataFile);
}
#ifdef MOZ_VERIFY_MAR_SIGNATURE
if (rv == OK) {
rv = gArchiveReader.VerifySignature();
}
if (rv == OK) {
rv = PopulategMARStrings();
if (rv == OK) {
rv = gArchiveReader.VerifyProductInformation(
gMARStrings.MARChannelID.get(), MOZ_APP_VERSION);
}
}
#endif
if (rv == OK && sStagedUpdate) {
#ifdef TEST_UPDATER
// The MOZ_TEST_SKIP_UPDATE_STAGE environment variable prevents copying
// the files in dist/bin in the test updater when staging an update since
// this can cause tests to timeout.
if (EnvHasValue("MOZ_TEST_SKIP_UPDATE_STAGE")) {
rv = OK;
} else if (EnvHasValue("MOZ_TEST_SLOW_SKIP_UPDATE_STAGE")) {
// The following is to simulate staging so the UI tests have time to
// show that the update is being staged.
NS_tchar continueFilePath[MAXPATHLEN] = {NS_T('\0')};
NS_tsnprintf(continueFilePath,
sizeof(continueFilePath) / sizeof(continueFilePath[0]),
NS_T("%s/continueStaging"), gInstallDirPath);
// Use 300 retries for staging requests to lessen the likelihood of
// tests intermittently failing on verify tasks due to launching the
// updater. The total time to wait with the default interval of 100 ms
// is approximately 30 seconds. The total time for tests is longer to
// account for the extra time it takes for the updater to launch.
const int max_retries = 300;
int retries = 0;
while (retries++ < max_retries) {
# ifdef XP_WIN
Sleep(100);
# else
usleep(100000);
# endif
// Continue after the continue file exists and is removed.
if (!NS_tremove(continueFilePath)) {
break;
}
}
rv = OK;
} else {
rv = CopyInstallDirToDestDir();
}
#else
rv = CopyInstallDirToDestDir();
#endif
}
if (rv == OK) {
rv = DoUpdate();
gArchiveReader.Close();
NS_tchar updatingDir[MAXPATHLEN];
NS_tsnprintf(updatingDir, sizeof(updatingDir) / sizeof(updatingDir[0]),
NS_T("%s/updating"), gWorkingDirPath);
ensure_remove_recursive(updatingDir);
}
}
if (rv && (sReplaceRequest || sStagedUpdate)) {
ensure_remove_recursive(gWorkingDirPath);
// When attempting to replace the application, we should fall back
// to non-staged updates in case of a failure. We do this by
// setting the status to pending, exiting the updater, and
// launching the callback application. The callback application's
// startup path will see the pending status, and will start the
// updater application again in order to apply the update without
// staging.
if (sReplaceRequest) {
WriteStatusFile(sUsingService ? "pending-service" : "pending");
} else {
WriteStatusFile(rv);
}
LOG(("failed: %d", rv));
#ifdef TEST_UPDATER
// Some tests need to use --test-process-updates again.
putenv(const_cast<char*>("MOZ_TEST_PROCESS_UPDATES="));
#endif
} else {
#ifdef TEST_UPDATER
const char* forceErrorCodeString = getenv("MOZ_FORCE_ERROR_CODE");
if (forceErrorCodeString && *forceErrorCodeString) {
rv = atoi(forceErrorCodeString);
}
#endif
if (rv) {
LOG(("failed: %d", rv));
} else {
#ifdef XP_MACOSX
// If the update was successful we need to update the timestamp on the
// top-level Mac OS X bundle directory so that Mac OS X's Launch Services
// picks up any major changes when the bundle is updated.
if (!sStagedUpdate && utimes(gInstallDirPath, nullptr) != 0) {
LOG(("Couldn't set access/modification time on application bundle."));
}
#endif
LOG(("succeeded"));
}
WriteStatusFile(rv);
}
LOG(("calling QuitProgressUI"));
QuitProgressUI();
}
#ifdef XP_MACOSX
static void ServeElevatedUpdateThreadFunc(void* param) {
UpdateServerThreadArgs* threadArgs = (UpdateServerThreadArgs*)param;
gSucceeded = ServeElevatedUpdate(threadArgs->argc, threadArgs->argv,
threadArgs->marChannelID);
if (!gSucceeded) {
WriteStatusFile(ELEVATION_CANCELED);
}
QuitProgressUI();
}
void freeArguments(int argc, char** argv) {
for (int i = 0; i < argc; i++) {
free(argv[i]);
}
free(argv);
}
#endif
int LaunchCallbackAndPostProcessApps(int argc, NS_tchar** argv,
int callbackIndex
#ifdef XP_WIN
,
const WCHAR* elevatedLockFilePath,
HANDLE updateLockFileHandle
#elif XP_MACOSX
,
mozilla::UniquePtr<UmaskContext>
umaskContext
#endif
) {
// We want to make sure to call `output_finish` before we leave this function
// and, if we end up launching the callback app, we want to call it before
// we do that (so that the callback app can operate on the output).
// But we want to do this as late as possible to make the log as detailed as
// possible.
class RaiiOutputFinish {
public:
RaiiOutputFinish() : mCalled(false) {}
~RaiiOutputFinish() { call(); }
void call() {
if (!mCalled) {
mCalled = true;
output_finish();
}
}
private:
bool mCalled;
} raii_output_finish;
#ifdef XP_MACOSX
umaskContext.reset();
#endif
if (argc > callbackIndex) {
#if defined(XP_WIN)
if (gSucceeded) {
LOG(("Launching Windows post update process"));
if (!LaunchWinPostProcess(gInstallDirPath, gPatchDirPath)) {
LOG(("The post update process was not launched successfully"));
}
# ifdef MOZ_MAINTENANCE_SERVICE
// The service update will only be executed if it is already installed.
// For first time installs of the service, the install will happen from
// the PostUpdate process. We do the service update process here
// because it's possible we are updating with updater.exe without the
// service if the service failed to apply the update. We want to update
// the service to a newer version in that case. If we are not running
// through the service, then MOZ_USING_SERVICE will not exist.
if (!sUsingService) {
LOG(("Starting Service Update before launching callback app"));
StartServiceUpdate(gInstallDirPath);
} else {
LOG(("Not starting service update. MMS will handle it."));
}
# endif
} else {
LOG(("Not launching Windows post update process because !gSucceeded"));
}
EXIT_WHEN_ELEVATED(elevatedLockFilePath, updateLockFileHandle, 0);
#elif XP_MACOSX
if (!gIsElevated) {
if (gSucceeded) {
LOG(("Launching macOS post update process"));
LaunchMacPostProcess(gInstallDirPath);
} else {
LOG(("Not launching macOS post update process because !gSucceeded"));
}
#endif
raii_output_finish.call();
LaunchCallbackApp(argv[5], argc - callbackIndex, argv + callbackIndex,
sUsingService);
#ifdef XP_MACOSX
} else { // isElevated
LOG(
("Not elevated. Skipping LaunchMacPostProcess and "
"LaunchCallbackApp"));
}
#endif /* XP_MACOSX */
}
else {
LOG(
("No callback arg. Skipping LaunchWinPostProcess and "
"LaunchCallbackApp"));
}
return 0;
}
bool ShouldRunSilently(int argc, NS_tchar** argv) {
#ifdef MOZ_BACKGROUNDTASKS
// If the callback has a --backgroundtask switch, consider it a background
// task. The CheckArg semantics aren't reproduced in full here,
// there's e.g. no check for a parameter and no case-insensitive comparison.
for (int i = 1; i < argc; ++i) {
if (const auto option = mozilla::internal::ReadAsOption(argv[i])) {
const NS_tchar* arg = option.value();
if (NS_tstrcmp(arg, NS_T("backgroundtask")) == 0) {
return true;
}
}
}
#endif // MOZ_BACKGROUNDTASKS
#if defined(XP_WIN) || defined(XP_MACOSX)
if (EnvHasValue("MOZ_APP_SILENT_START")) {
return true;
}
#endif
return false;
}
int NS_main(int argc, NS_tchar** argv) {
#ifdef MOZ_MAINTENANCE_SERVICE
sUsingService = EnvHasValue("MOZ_USING_SERVICE");
putenv(const_cast<char*>("MOZ_USING_SERVICE="));
#endif
if (argc == 2 && NS_tstrcmp(argv[1], NS_T("--channels-allowed")) == 0) {
#ifdef MOZ_VERIFY_MAR_SIGNATURE
int rv = PopulategMARStrings();
if (rv == OK) {
printf("Channels Allowed: '%s'\n", gMARStrings.MARChannelID.get());
return 0;
}
printf("Error: %d\n", rv);
return 1;
#else
printf("Not Applicable: No support for signature verification\n");
return 0;
#endif
}
// The callback is the remaining arguments starting at callbackIndex.
// The argument specified by callbackIndex is the callback executable and the
// argument prior to callbackIndex is the working directory.
const int callbackIndex = 6;
// `isDMGInstall` is only ever true for macOS, but we are declaring it here
// to avoid a ton of extra #ifdef's.
bool isDMGInstall = false;
#ifdef XP_MACOSX
if (argc > 2 && NS_tstrcmp(argv[1], NS_T("--openAppBundle")) == 0) {
// We have been asked to open a .app bundle. The path to the .app bundle and
// any command line arguments have been passed to us as arguments after
// "--openAppBundle", so remove the first two arguments and launch the .app
// bundle.
LaunchMacApp(argc - 2, (const char**)argv + 2);
return 0;
}
// We want to control file permissions explicitly, or else we could end up
// corrupting installs for other users on the system. Accordingly, set the
// umask to 0 for all file creations below and reset it on exit. See Bug
// 1337007
mozilla::UniquePtr<UmaskContext> umaskContext(new UmaskContext(0));
// This will be used to set `gIsElevated`, but we are going to do it later
// when we are ready to set it for every OS to avoid inconsistency.
bool isElevated =
strstr(argv[0], "/Library/PrivilegedHelperTools/org.mozilla.updater") !=
0;
if (isElevated) {
if (!ObtainUpdaterArguments(&argc, &argv, &gMARStrings)) {
// Won't actually get here because ObtainUpdaterArguments will terminate
// the current process on failure.
return 1;
}
}
if (argc == 4 && (strstr(argv[1], "-dmgInstall") != 0)) {
isDMGInstall = true;
if (isElevated) {
PerformInstallationFromDMG(argc, argv);
freeArguments(argc, argv);
CleanupElevatedMacUpdate(true);
return 0;
}
}
#endif
if (!isDMGInstall) {
// Skip update-related code path for DMG installs.
#if defined(MOZ_VERIFY_MAR_SIGNATURE) && defined(MAR_NSS)
// If using NSS for signature verification, initialize NSS but minimize
// the portion we depend on by avoiding all of the NSS databases.
if (NSS_NoDB_Init(nullptr) != SECSuccess) {
PRErrorCode error = PR_GetError();
fprintf(stderr, "Could not initialize NSS: %s (%d)",
PR_ErrorToName(error), (int)error);
_exit(1);
}
#endif
// To process an update the updater command line must at a minimum have the
// directory path containing the updater.mar file to process as the first
// argument, the install directory as the second argument, and the directory
// to apply the update to as the third argument. When the updater is
// launched by another process the PID of the parent process should be
// provided in the optional fourth argument and the updater will wait on the
// parent process to exit if the value is non-zero and the process is
// present. This is necessary due to not being able to update files that are
// in use on Windows. The optional fifth argument is the callback's working
// directory and the optional sixth argument is the callback path. The
// callback is the application to launch after updating and it will be
// launched when these arguments are provided whether the update was
// successful or not. All remaining arguments are optional and are passed to
// the callback when it is launched.
if (argc < 4) {
fprintf(stderr,
"Usage: updater patch-dir install-dir apply-to-dir [wait-pid "
"[callback-working-dir callback-path args...]]\n");
#ifdef XP_MACOSX
if (isElevated) {
freeArguments(argc, argv);
CleanupElevatedMacUpdate(true);
}
#endif
return 1;
}
#if defined(TEST_UPDATER) && defined(XP_WIN)
// The tests use nsIProcess to launch the updater and it is simpler for the
// tests to just set an environment variable and have the test updater set
// the current working directory than it is to set the current working
// directory in the test itself.
if (EnvHasValue("CURWORKDIRPATH")) {
const WCHAR* val = _wgetenv(L"CURWORKDIRPATH");
NS_tchdir(val);
}
#endif
} // if (!isDMGInstall)
// The directory containing the update information.
NS_tstrncpy(gPatchDirPath, argv[1], MAXPATHLEN);
gPatchDirPath[MAXPATHLEN - 1] = NS_T('\0');
#ifdef XP_WIN
NS_tchar elevatedLockFilePath[MAXPATHLEN] = {NS_T('\0')};
NS_tsnprintf(elevatedLockFilePath,
sizeof(elevatedLockFilePath) / sizeof(elevatedLockFilePath[0]),
NS_T("%s\\update_elevated.lock"), gPatchDirPath);
gUseSecureOutputPath =
sUsingService || (NS_tremove(elevatedLockFilePath) && errno != ENOENT);
// Even if a file has no sharing access, you can still get its attributes
// If we are running elevated, this file will exist, having been opened by
// the unelevated updater that started this one.
gIsElevated =
GetFileAttributesW(elevatedLockFilePath) != INVALID_FILE_ATTRIBUTES;
#elif defined(XP_MACOSX)
// This is only ever true on macOS and Windows. We don't currently have a
// way of elevating on other platforms.
gIsElevated = isElevated;
#endif
if (!isDMGInstall) {
// This check is also performed in workmonitor.cpp since the maintenance
// service can be called directly.
if (!IsValidFullPath(argv[1])) {
// Since the status file is written to the patch directory and the patch
// directory is invalid don't write the status file.
fprintf(stderr,
"The patch directory path is not valid for this "
"application (" LOG_S ")\n",
argv[1]);
#ifdef XP_MACOSX
if (isElevated) {
freeArguments(argc, argv);
CleanupElevatedMacUpdate(true);
}
#endif
return 1;
}
// This check is also performed in workmonitor.cpp since the maintenance
// service can be called directly.
if (!IsValidFullPath(argv[2])) {
WriteStatusFile(INVALID_INSTALL_DIR_PATH_ERROR);
fprintf(stderr,
"The install directory path is not valid for this "
"application (" LOG_S ")\n",
argv[2]);
#ifdef XP_MACOSX
if (isElevated) {
freeArguments(argc, argv);
CleanupElevatedMacUpdate(true);
}
#endif
return 1;
}
} // if (!isDMGInstall)
// The directory we're going to update to.
// We copy this string because we need to remove trailing slashes. The C++
// standard says that it's always safe to write to strings pointed to by argv
// elements, but I don't necessarily believe it.
NS_tstrncpy(gInstallDirPath, argv[2], MAXPATHLEN);
gInstallDirPath[MAXPATHLEN - 1] = NS_T('\0');
NS_tchar* slash = NS_tstrrchr(gInstallDirPath, NS_SLASH);
if (slash && !slash[1]) {
*slash = NS_T('\0');
}
#ifdef XP_WIN
bool useService = false;
bool testOnlyFallbackKeyExists = false;
// Prevent the updater from falling back from updating with the Maintenance
// Service to updating without the Service. Used for Service tests.
// This is set below via the MOZ_NO_SERVICE_FALLBACK environment variable.
bool noServiceFallback = false;
// Force the updater to use the Maintenance Service incorrectly, causing it
// to fail. Used to test the mechanism that allows the updater to fall back
// from using the Maintenance Service to updating without it.
// This is set below via the MOZ_FORCE_SERVICE_FALLBACK environment variable.
bool forceServiceFallback = false;
#endif
if (!isDMGInstall) {
#ifdef XP_WIN
// We never want the service to be used unless we build with
// the maintenance service.
# ifdef MOZ_MAINTENANCE_SERVICE
useService = IsUpdateStatusPendingService();
# ifdef TEST_UPDATER
noServiceFallback = EnvHasValue("MOZ_NO_SERVICE_FALLBACK");
putenv(const_cast<char*>("MOZ_NO_SERVICE_FALLBACK="));
forceServiceFallback = EnvHasValue("MOZ_FORCE_SERVICE_FALLBACK");
putenv(const_cast<char*>("MOZ_FORCE_SERVICE_FALLBACK="));
// Our tests run with a different apply directory for each test.
// We use this registry key on our test machines to store the
// allowed name/issuers.
testOnlyFallbackKeyExists = DoesFallbackKeyExist();
# endif
# endif
// Remove everything except close window from the context menu
{
HKEY hkApp = nullptr;
RegCreateKeyExW(HKEY_CURRENT_USER, L"Software\\Classes\\Applications", 0,
nullptr, REG_OPTION_NON_VOLATILE, KEY_SET_VALUE, nullptr,
&hkApp, nullptr);
RegCloseKey(hkApp);
if (RegCreateKeyExW(HKEY_CURRENT_USER,
L"Software\\Classes\\Applications\\updater.exe", 0,
nullptr, REG_OPTION_VOLATILE, KEY_SET_VALUE, nullptr,
&hkApp, nullptr) == ERROR_SUCCESS) {
RegSetValueExW(hkApp, L"IsHostApp", 0, REG_NONE, 0, 0);
RegSetValueExW(hkApp, L"NoOpenWith", 0, REG_NONE, 0, 0);
RegSetValueExW(hkApp, L"NoStartPage", 0, REG_NONE, 0, 0);
RegCloseKey(hkApp);
}
}
#endif
} // if (!isDMGInstall)
// If there is a PID specified and it is not '0' then wait for the process to
// exit.
NS_tpid pid = 0;
if (argc > 4) {
pid = NS_tatoi(argv[4]);
if (pid == -1) {
// This is a signal from the parent process that the updater should stage
// the update.
sStagedUpdate = true;
} else if (NS_tstrstr(argv[4], NS_T("/replace"))) {
// We're processing a request to replace the application with a staged
// update.
sReplaceRequest = true;
}
}
if (!isDMGInstall) {
// This check is also performed in workmonitor.cpp since the maintenance
// service can be called directly.
if (!IsValidFullPath(argv[3])) {
WriteStatusFile(INVALID_WORKING_DIR_PATH_ERROR);
fprintf(stderr,
"The working directory path is not valid for this "
"application (" LOG_S ")\n",
argv[3]);
#ifdef XP_MACOSX
if (isElevated) {
freeArguments(argc, argv);
CleanupElevatedMacUpdate(true);
}
#endif
return 1;
}
// The directory we're going to update to.
// We copy this string because we need to remove trailing slashes. The C++
// standard says that it's always safe to write to strings pointed to by
// argv elements, but I don't necessarily believe it.
NS_tstrncpy(gWorkingDirPath, argv[3], MAXPATHLEN);
gWorkingDirPath[MAXPATHLEN - 1] = NS_T('\0');
slash = NS_tstrrchr(gWorkingDirPath, NS_SLASH);
if (slash && !slash[1]) {
*slash = NS_T('\0');
}
if (argc > callbackIndex) {
if (!IsValidFullPath(argv[callbackIndex])) {
WriteStatusFile(INVALID_CALLBACK_PATH_ERROR);
fprintf(stderr,
"The callback file path is not valid for this "
"application (" LOG_S ")\n",
argv[callbackIndex]);
#ifdef XP_MACOSX
if (isElevated) {
freeArguments(argc, argv);
CleanupElevatedMacUpdate(true);
}
#endif
return 1;
}
size_t len = NS_tstrlen(gInstallDirPath);
NS_tchar callbackInstallDir[MAXPATHLEN] = {NS_T('\0')};
NS_tstrncpy(callbackInstallDir, argv[callbackIndex], len);
if (NS_tstrcmp(gInstallDirPath, callbackInstallDir) != 0) {
WriteStatusFile(INVALID_CALLBACK_DIR_ERROR);
fprintf(stderr,
"The callback file must be located in the "
"installation directory (" LOG_S ")\n",
argv[callbackIndex]);
#ifdef XP_MACOSX
if (isElevated) {
freeArguments(argc, argv);
CleanupElevatedMacUpdate(true);
}
#endif
return 1;
}
sUpdateSilently =
ShouldRunSilently(argc - callbackIndex, argv + callbackIndex);
}
} // if (!isDMGInstall)
if (!sUpdateSilently && !isDMGInstall
#ifdef XP_MACOSX
&& !isElevated
#endif
) {
InitProgressUI(&argc, &argv);
}
#ifdef XP_MACOSX
if (!isElevated && (!IsRecursivelyWritable(argv[2]) || isDMGInstall)) {
// If the app directory isn't recursively writeable or if this is a DMG
// install, an elevated helper process is required.
if (sUpdateSilently) {
// An elevated update always requires an elevation dialog, so if we are
// updating silently, don't do an elevated update.
// This means that we cannot successfully perform silent updates from
// non-admin accounts on a Mac.
// It also means that we cannot silently perform the first update by an
// admin who was not the installing user. Once the first update has been
// installed, the permissions of the installation directory should be
// changed such that we don't need to elevate in the future.
// Firefox shouldn't actually launch the updater at all in this case. This
// is defense in depth.
WriteStatusFile(SILENT_UPDATE_NEEDED_ELEVATION_ERROR);
fprintf(stderr,
"Skipping update to avoid elevation prompt from silent update.");
} else {
UpdateServerThreadArgs threadArgs;
threadArgs.argc = argc;
threadArgs.argv = const_cast<const NS_tchar**>(argv);
threadArgs.marChannelID = gMARStrings.MARChannelID.get();
Thread t1;
if (t1.Run(ServeElevatedUpdateThreadFunc, &threadArgs) == 0) {
// Show an indeterminate progress bar while an elevated update is in
// progress.
if (!isDMGInstall) {
ShowProgressUI(true);
}
}
t1.Join();
}
LaunchCallbackAndPostProcessApps(argc, argv, callbackIndex,
std::move(umaskContext));
return gSucceeded ? 0 : 1;
}
#endif
#ifdef XP_WIN
HANDLE updateLockFileHandle = INVALID_HANDLE_VALUE;
#endif
if (!isDMGInstall) {
NS_tchar logFilePath[MAXPATHLEN + 1] = {L'\0'};
#ifdef XP_WIN
if (gUseSecureOutputPath) {
// Remove the secure output files so it is easier to determine when new
// files are created in the unelevated updater.
RemoveSecureOutputFiles(gPatchDirPath);
(void)GetSecureOutputFilePath(gPatchDirPath, L".log", logFilePath);
} else {
NS_tsnprintf(logFilePath, sizeof(logFilePath) / sizeof(logFilePath[0]),
NS_T("%s\\%s"), gPatchDirPath, UpdateLogFilename());
}
#else
NS_tsnprintf(logFilePath, sizeof(logFilePath) / sizeof(logFilePath[0]),
NS_T("%s/%s"), gPatchDirPath, UpdateLogFilename());
#endif
LogInit(logFilePath);
LOG(("sUsingService=%s", sUsingService ? "true" : "false"));
LOG(("sUpdateSilently=%s", sUpdateSilently ? "true" : "false"));
#ifdef XP_WIN
LOG(("gUseSecureOutputPath=%s", gUseSecureOutputPath ? "true" : "false"));
// Note that this is not the final value of useService
LOG(("useService=%s", useService ? "true" : "false"));
#endif
LOG(("gIsElevated=%s", gIsElevated ? "true" : "false"));
if (!WriteStatusFile("applying")) {
LOG(("failed setting status to 'applying'"));
#ifdef XP_MACOSX
if (isElevated) {
freeArguments(argc, argv);
CleanupElevatedMacUpdate(true);
}
#endif
output_finish();
return 1;
}
if (sStagedUpdate) {
LOG(("Performing a staged update"));
} else if (sReplaceRequest) {
LOG(("Performing a replace request"));
}
LOG(("PATCH DIRECTORY " LOG_S, gPatchDirPath));
LOG(("INSTALLATION DIRECTORY " LOG_S, gInstallDirPath));
LOG(("WORKING DIRECTORY " LOG_S, gWorkingDirPath));
#if defined(XP_WIN)
// These checks are also performed in workmonitor.cpp since the maintenance
// service can be called directly.
if (_wcsnicmp(gWorkingDirPath, gInstallDirPath, MAX_PATH) != 0) {
if (!sStagedUpdate && !sReplaceRequest) {
WriteStatusFile(INVALID_APPLYTO_DIR_ERROR);
LOG(
("Installation directory and working directory must be the same "
"for non-staged updates. Exiting."));
output_finish();
return 1;
}
NS_tchar workingDirParent[MAX_PATH];
NS_tsnprintf(workingDirParent,
sizeof(workingDirParent) / sizeof(workingDirParent[0]),
NS_T("%s"), gWorkingDirPath);
if (!PathRemoveFileSpecW(workingDirParent)) {
WriteStatusFile(REMOVE_FILE_SPEC_ERROR);
LOG(("Error calling PathRemoveFileSpecW: %lu", GetLastError()));
output_finish();
return 1;
}
if (_wcsnicmp(workingDirParent, gInstallDirPath, MAX_PATH) != 0) {
WriteStatusFile(INVALID_APPLYTO_DIR_STAGED_ERROR);
LOG(
("The apply-to directory must be the same as or "
"a child of the installation directory! Exiting."));
output_finish();
return 1;
}
}
#endif
#ifdef XP_WIN
if (pid > 0) {
HANDLE parent = OpenProcess(SYNCHRONIZE, false, (DWORD)pid);
// May return nullptr if the parent process has already gone away.
// Otherwise, wait for the parent process to exit before starting the
// update.
if (parent) {
DWORD waitTime = PARENT_WAIT;
# ifdef TEST_UPDATER
if (EnvHasValue("MOZ_TEST_SHORTER_WAIT_PID")) {
// Use a shorter time to wait for the PID to exit for the test.
waitTime = 100;
}
# endif
DWORD result = WaitForSingleObject(parent, waitTime);
CloseHandle(parent);
if (result != WAIT_OBJECT_0) {
// Continue to update since the parent application sometimes doesn't
// be applied instead of leaving the client in a broken state.
LOG(("The parent process didn't exit! Continuing with update."));
}
}
}
#endif
#ifdef XP_WIN
if (sReplaceRequest || sStagedUpdate) {
// On Windows, when performing a stage or replace request the current
// working directory for the process must be changed so it isn't locked.
NS_tchar sysDir[MAX_PATH + 1] = {L'\0'};
if (GetSystemDirectoryW(sysDir, MAX_PATH + 1)) {
NS_tchdir(sysDir);
}
}
// lastFallbackError keeps track of the last error for the service not being
// used, in case of an error when fallback is not enabled we write the
// error to the update.status file.
// When fallback is disabled (MOZ_NO_SERVICE_FALLBACK does not exist) then
// we will instead fallback to not using the service and display a UAC
// prompt.
int lastFallbackError = FALLBACKKEY_UNKNOWN_ERROR;
// Check whether a second instance of the updater should be launched by the
// maintenance service or with the 'runas' verb when write access is denied
// to the installation directory.
if (!sUsingService &&
(argc > callbackIndex || sStagedUpdate || sReplaceRequest)) {
LOG(("Checking whether elevation is needed"));
NS_tchar updateLockFilePath[MAXPATHLEN];
if (sStagedUpdate) {
// When staging an update, the lock file is:
// <install_dir>\updated.update_in_progress.lock
NS_tsnprintf(updateLockFilePath,
sizeof(updateLockFilePath) / sizeof(updateLockFilePath[0]),
NS_T("%s/updated.update_in_progress.lock"),
gInstallDirPath);
} else if (sReplaceRequest) {
// When processing a replace request, the lock file is:
// <install_dir>\..\moz_update_in_progress.lock
NS_tchar installDir[MAXPATHLEN];
NS_tstrcpy(installDir, gInstallDirPath);
NS_tchar* slash = (NS_tchar*)NS_tstrrchr(installDir, NS_SLASH);
*slash = NS_T('\0');
NS_tsnprintf(updateLockFilePath,
sizeof(updateLockFilePath) / sizeof(updateLockFilePath[0]),
NS_T("%s\\moz_update_in_progress.lock"), installDir);
} else {
// In the non-staging update case, the lock file is:
// <install_dir>\<app_name>.exe.update_in_progress.lock
NS_tsnprintf(updateLockFilePath,
sizeof(updateLockFilePath) / sizeof(updateLockFilePath[0]),
NS_T("%s.update_in_progress.lock"), argv[callbackIndex]);
}
// The update_in_progress.lock file should only exist during an update. In
// case it exists attempt to remove it and exit if that fails to prevent
// simultaneous updates occurring.
if (NS_tremove(updateLockFilePath) && errno != ENOENT) {
// Try to fall back to the old way of doing updates if a staged
// update fails.
if (sReplaceRequest) {
// Note that this could fail, but if it does, there isn't too much we
// can do in order to recover anyways.
WriteStatusFile("pending");
} else if (sStagedUpdate) {
WriteStatusFile(DELETE_ERROR_STAGING_LOCK_FILE);
}
LOG(("Update already in progress! Exiting"));
output_finish();
return 1;
}
updateLockFileHandle =
CreateFileW(updateLockFilePath, GENERIC_READ | GENERIC_WRITE, 0,
nullptr, OPEN_ALWAYS, FILE_FLAG_DELETE_ON_CLOSE, nullptr);
if (updateLockFileHandle == INVALID_HANDLE_VALUE) {
LOG(("Failed to open update lock file: %lu", GetLastError()));
} else {
LOG(("Successfully opened lock file"));
}
// If we're running from the service, then we were started with the same
// token as the service so the permissions are already dropped. If we're
// running from an elevated updater that was started from an unelevated
// updater, then we drop the permissions here. We do not drop the
// permissions on the originally called updater because we use its token
// to start the callback application.
if (gIsElevated) {
// Disable every privilege we don't need. Processes started using
// CreateProcess will use the same token as this process.
UACHelper::DisablePrivileges(nullptr);
}
if (updateLockFileHandle == INVALID_HANDLE_VALUE ||
(useService && testOnlyFallbackKeyExists &&
(noServiceFallback || forceServiceFallback))) {
LOG(("Can't open lock file - seems like we need elevation"));
HANDLE elevatedFileHandle;
if (NS_tremove(elevatedLockFilePath) && errno != ENOENT) {
LOG(("Unable to create elevated lock file! Exiting"));
output_finish();
return 1;
}
elevatedFileHandle = CreateFileW(
elevatedLockFilePath, GENERIC_READ | GENERIC_WRITE, 0, nullptr,
OPEN_ALWAYS, FILE_FLAG_DELETE_ON_CLOSE, nullptr);
if (elevatedFileHandle == INVALID_HANDLE_VALUE) {
LOG(("Unable to create elevated lock file! Exiting"));
output_finish();
return 1;
}
auto cmdLine = mozilla::MakeCommandLine(argc - 1, argv + 1);
if (!cmdLine) {
LOG(("Failed to make command line! Exiting"));
CloseHandle(elevatedFileHandle);
output_finish();
return 1;
}
# ifdef MOZ_MAINTENANCE_SERVICE
// Only invoke the service for installations in Program Files.
// This check is duplicated in workmonitor.cpp because the service can
// be invoked directly without going through the updater.
# ifndef TEST_UPDATER
if (useService) {
useService = IsProgramFilesPath(gInstallDirPath);
LOG(("After checking IsProgramFilesPath, useService=%s",
useService ? "true" : "false"));
}
# endif
// Make sure the path to the updater to use for the update is on local.
// We do this check to make sure that file locking is available for
// race condition security checks.
if (useService) {
BOOL isLocal = FALSE;
useService = IsLocalFile(argv[0], isLocal) && isLocal;
LOG(("After checking IsLocalFile, useService=%s",
useService ? "true" : "false"));
}
// If we have unprompted elevation we should NOT use the service
// for the update. Service updates happen with the SYSTEM account
// which has more privs than we need to update with.
// Windows 8 provides a user interface so users can configure this
// behavior and it can be configured in the registry in all Windows
// versions that support UAC.
if (useService) {
BOOL unpromptedElevation;
if (IsUnpromptedElevation(unpromptedElevation)) {
useService = !unpromptedElevation;
LOG(("After checking IsUnpromptedElevation, useService=%s",
useService ? "true" : "false"));
}
}
// Make sure the service registry entries for the installation path
// are available. If not don't use the service.
if (useService) {
WCHAR maintenanceServiceKey[MAX_PATH + 1];
if (CalculateRegistryPathFromFilePath(gInstallDirPath,
maintenanceServiceKey)) {
HKEY baseKey = nullptr;
if (RegOpenKeyExW(HKEY_LOCAL_MACHINE, maintenanceServiceKey, 0,
KEY_READ | KEY_WOW64_64KEY,
&baseKey) == ERROR_SUCCESS) {
RegCloseKey(baseKey);
} else {
# ifdef TEST_UPDATER
useService = testOnlyFallbackKeyExists;
LOG(("After failing to open maintenanceServiceKey, useService=%s",
useService ? "true" : "false"));
# endif
if (!useService) {
lastFallbackError = FALLBACKKEY_NOKEY_ERROR;
}
}
} else {
useService = false;
lastFallbackError = FALLBACKKEY_REGPATH_ERROR;
LOG(("Can't get registry certificate location. useService=false"));
}
}
// Originally we used to write "pending" to update.status before
// launching the service command. This is no longer needed now
// since the service command is launched from updater.exe. If anything
// fails in between, we can fall back to using the normal update process
// on our own.
// If we still want to use the service try to launch the service
// command for the update.
if (useService) {
// Get the secure ID before trying to update so it is possible to
// determine if the updater or the maintenance service has created a
// new one.
char uuidStringBefore[UUID_LEN] = {'\0'};
bool checkID = GetSecureID(uuidStringBefore);
// Write a catchall service failure status in case it fails without
// changing the status.
WriteStatusFile(SERVICE_UPDATE_STATUS_UNCHANGED);
int serviceArgc = argc;
if (forceServiceFallback && serviceArgc > 2) {
// To force the service to fail, we can just pass it too few
// arguments. However, we don't want to pass it no arguments,
// because then it won't have enough information to write out the
// update status file telling us that it failed.
serviceArgc = 2;
}
// If the update couldn't be started, then set useService to false so
// we do the update the old way.
DWORD ret =
LaunchServiceSoftwareUpdateCommand(serviceArgc, (LPCWSTR*)argv);
useService = (ret == ERROR_SUCCESS);
// If the command was launched then wait for the service to be done.
if (useService) {
LOG(("Launched service successfully"));
bool showProgressUI = false;
// Never show the progress UI when staging updates or in a
// background task.
if (!sStagedUpdate && !sUpdateSilently) {
// We need to call this separately instead of allowing
// ShowProgressUI to initialize the strings because the service
// will move the ini file out of the way when running updater.
showProgressUI = !InitProgressUIStrings();
}
// Wait for the service to stop for 5 seconds. If the service
// has still not stopped then show an indeterminate progress bar.
DWORD lastState = WaitForServiceStop(SVC_NAME, 5);
if (lastState != SERVICE_STOPPED) {
Thread t1;
if (t1.Run(WaitForServiceFinishThread, nullptr) == 0 &&
showProgressUI) {
ShowProgressUI(true, false);
}
t1.Join();
}
lastState = WaitForServiceStop(SVC_NAME, 1);
if (lastState != SERVICE_STOPPED) {
// If the service doesn't stop after 10 minutes there is
// something seriously wrong.
lastFallbackError = FALLBACKKEY_SERVICE_NO_STOP_ERROR;
useService = false;
LOG(("Service didn't stop after 10 minutes. useService=false"));
} else {
LOG(("Service stop detected."));
// Copy the secure output files if the secure ID has changed.
gCopyOutputFiles = true;
char uuidStringAfter[UUID_LEN] = {'\0'};
if (checkID && GetSecureID(uuidStringAfter) &&
strncmp(uuidStringBefore, uuidStringAfter,
sizeof(uuidStringBefore)) == 0) {
LOG(
("The secure ID hasn't changed after launching the updater "
"using the service"));
gCopyOutputFiles = false;
}
if (gCopyOutputFiles && !sStagedUpdate && !noServiceFallback) {
// If the Maintenance Service fails for a Service-specific
// reason, we ought to fall back to attempting to update
// without the Service.
// However, we need the secure output files to be able to be
// check the error code, and we can't fall back when we are
// staging, because we will need to show a UAC.
bool updateFailed;
mozilla::Maybe<int> maybeErrorCode;
bool success =
IsSecureUpdateStatusFailed(updateFailed, &maybeErrorCode);
if (success && updateFailed && maybeErrorCode.isSome() &&
IsServiceSpecificErrorCode(maybeErrorCode.value())) {
useService = false;
LOG(("Service-specific failure detected. useService=false"));
}
}
}
} else {
LOG(("Launching service failed. useService=false"));
lastFallbackError = FALLBACKKEY_LAUNCH_ERROR;
}
}
# endif
// If the service can't be used when staging an update, make sure that
// the UAC prompt is not shown!
if (!useService && sStagedUpdate) {
if (updateLockFileHandle != INVALID_HANDLE_VALUE) {
CloseHandle(updateLockFileHandle);
}
// Set an error so the failure is reported. This will be reset
// to pending so the update can be applied during the next startup,
WriteStatusFile(UNEXPECTED_STAGING_ERROR);
LOG(
("Non-critical update staging error! Falling back to non-staged "
"updates and exiting"));
output_finish();
// We don't have a callback when staging so we can just exit.
return 0;
}
// If the service can't be used when in a background task, make sure
// that the UAC prompt is not shown!
if (!useService && sUpdateSilently) {
if (updateLockFileHandle != INVALID_HANDLE_VALUE) {
CloseHandle(updateLockFileHandle);
}
// Set an error so we don't get into an update loop when the callback
// runs. This will be reset to pending by handleUpdateFailure in
// UpdateService.sys.mjs.
WriteStatusFile(SILENT_UPDATE_NEEDED_ELEVATION_ERROR);
LOG(("Skipping update to avoid UAC prompt from background task."));
output_finish();
LaunchCallbackApp(argv[5], argc - callbackIndex, argv + callbackIndex,
sUsingService);
return 0;
}
// If we didn't want to use the service at all, or if an update was
// already happening, or launching the service command failed, then
// launch the elevated updater.exe as we do without the service.
// We don't launch the elevated updater in the case that we did have
// write access all along because in that case the only reason we're
// using the service is because we are testing.
if (!useService && !noServiceFallback &&
(updateLockFileHandle == INVALID_HANDLE_VALUE ||
forceServiceFallback)) {
LOG(("Elevating via a UAC prompt"));
// Get the secure ID before trying to update so it is possible to
// determine if the updater has created a new one.
char uuidStringBefore[UUID_LEN] = {'\0'};
bool checkID = GetSecureID(uuidStringBefore);
// Write a catchall failure status in case it fails without changing
// the status.
WriteStatusFile(UPDATE_STATUS_UNCHANGED);
SHELLEXECUTEINFO sinfo;
memset(&sinfo, 0, sizeof(SHELLEXECUTEINFO));
sinfo.cbSize = sizeof(SHELLEXECUTEINFO);
sinfo.fMask = SEE_MASK_FLAG_NO_UI | SEE_MASK_FLAG_DDEWAIT |
SEE_MASK_NOCLOSEPROCESS;
sinfo.hwnd = nullptr;
sinfo.lpFile = argv[0];
sinfo.lpParameters = cmdLine.get();
if (forceServiceFallback) {
// In testing, we don't actually want a UAC prompt. We should
// already have the permissions such that we shouldn't need it.
// And we don't have a good way of accepting the prompt in
// automation.
sinfo.lpVerb = L"open";
// This handle is what lets the updater that we spawn below know
// that it's the elevated updater. We are going to close it so that
// it doesn't know that and will run un-elevated. Doing this make
// this makes for an imperfect test of the service fallback
// functionality because it changes how the (usually) elevated
// updater runs. One of the effects of this is that the secure
// output files will not be used. So that functionality won't really
// be covered by testing. But we can't really have the updater run
// elevated, because that would require a UAC, which we have no way
// to deal with in automation.
CloseHandle(elevatedFileHandle);
// We need to let go of the update lock to let the un-elevated
// updater we are about to spawn update.
if (updateLockFileHandle != INVALID_HANDLE_VALUE) {
CloseHandle(updateLockFileHandle);
}
} else {
sinfo.lpVerb = L"runas";
}
sinfo.nShow = SW_SHOWNORMAL;
bool result = ShellExecuteEx(&sinfo);
if (result) {
LOG(("Elevation successful. Waiting for elevated updater to run."));
WaitForSingleObject(sinfo.hProcess, INFINITE);
LOG(("Elevated updater has finished running."));
CloseHandle(sinfo.hProcess);
// Copy the secure output files if the secure ID has changed.
gCopyOutputFiles = true;
char uuidStringAfter[UUID_LEN] = {'\0'};
if (checkID && GetSecureID(uuidStringAfter) &&
strncmp(uuidStringBefore, uuidStringAfter,
sizeof(uuidStringBefore)) == 0) {
LOG(
("The secure ID hasn't changed after launching the updater "
"using runas"));
gCopyOutputFiles = false;
}
} else {
// Don't copy the secure output files if the elevation request was
// canceled since the status file written below is in the patch
// directory. At this point it should already be set to false and
// this is set here to make it clear that it should be false at this
// point and to prevent future changes from regressing this code.
gCopyOutputFiles = false;
WriteStatusFile(ELEVATION_CANCELED);
LOG(("Elevation canceled."));
}
} else {
LOG(("Not showing a UAC prompt."));
LOG(("useService=%s", useService ? "true" : "false"));
LOG(("noServiceFallback=%s", noServiceFallback ? "true" : "false"));
LOG(("updateLockFileHandle%sINVALID_HANDLE_VALUE",
updateLockFileHandle == INVALID_HANDLE_VALUE ? "==" : "!="));
LOG(("forceServiceFallback=%s",
forceServiceFallback ? "true" : "false"));
}
// If we started the elevated updater, and it finished, check the secure
// update status file to make sure that it succeeded, and if it did we
// need to launch the PostUpdate process in the unelevated updater which
// is running in the current user's session. Note that we don't need to
// do this when staging an update since the PostUpdate step runs during
// the replace request.
if (!sStagedUpdate) {
bool updateStatusSucceeded = false;
if (IsSecureUpdateStatusSucceeded(updateStatusSucceeded) &&
updateStatusSucceeded) {
LOG(("Running LaunchWinPostProcess"));
if (!LaunchWinPostProcess(gInstallDirPath, gPatchDirPath)) {
LOG(("Failed to run LaunchWinPostProcess"));
}
} else {
LOG(
("Not running LaunchWinPostProcess because update status is not"
"'succeeded'."));
}
}
CloseHandle(elevatedFileHandle);
if (updateLockFileHandle != INVALID_HANDLE_VALUE) {
CloseHandle(updateLockFileHandle);
}
if (!useService && noServiceFallback) {
// When the service command was not launched at all.
// We should only reach this code path because we had write access
// all along to the directory and a fallback key existed, and we
// have fallback disabled (MOZ_NO_SERVICE_FALLBACK env var exists).
// We only currently use this env var from XPCShell tests.
gCopyOutputFiles = false;
WriteStatusFile(lastFallbackError);
}
// The logging output needs to be finished before launching the callback
// application so the update status file contains the value from the
// secure directory used by the maintenance service and the elevated
// updater.
LOG(("Update complete"));
output_finish();
if (argc > callbackIndex) {
LaunchCallbackApp(argv[5], argc - callbackIndex, argv + callbackIndex,
sUsingService);
}
return 0;
// This is the end of the code block for launching another instance of
// the updater using either the maintenance service or with the 'runas'
// verb when the updater doesn't have write access to the installation
// directory.
}
// This is the end of the code block when the updater was not launched by
// the service that checks whether the updater has write access to the
// installation directory.
}
// If we made it this far this is the updater instance that will perform the
// actual update and gCopyOutputFiles will be false (e.g. the default
// value).
LOG(("Going to update via this updater instance."));
#endif
if (sStagedUpdate) {
#ifdef TEST_UPDATER
// This allows testing that the correct UI after an update staging failure
// that falls back to applying the update on startup. It is simulated due
// to the difficulty of creating the conditions for this type of staging
// failure.
if (EnvHasValue("MOZ_TEST_STAGING_ERROR")) {
# ifdef XP_WIN
if (updateLockFileHandle != INVALID_HANDLE_VALUE) {
CloseHandle(updateLockFileHandle);
}
# endif
// WRITE_ERROR is one of the cases where the staging failure falls back
// to applying the update on startup.
WriteStatusFile(WRITE_ERROR);
output_finish();
return 0;
}
#endif
// When staging updates, blow away the old installation directory and
// create it from scratch.
ensure_remove_recursive(gWorkingDirPath);
}
if (!sReplaceRequest) {
// Try to create the destination directory if it doesn't exist
int rv = NS_tmkdir(gWorkingDirPath, 0755);
if (rv != OK && errno != EEXIST) {
#ifdef XP_MACOSX
if (isElevated) {
freeArguments(argc, argv);
CleanupElevatedMacUpdate(true);
}
#endif
output_finish();
return 1;
}
}
#ifdef XP_WIN
NS_tchar applyDirLongPath[MAXPATHLEN];
if (!GetLongPathNameW(
gWorkingDirPath, applyDirLongPath,
sizeof(applyDirLongPath) / sizeof(applyDirLongPath[0]))) {
WriteStatusFile(WRITE_ERROR_APPLY_DIR_PATH);
LOG(("NS_main: unable to find apply to dir: " LOG_S, gWorkingDirPath));
output_finish();
EXIT_WHEN_ELEVATED(elevatedLockFilePath, updateLockFileHandle, 1);
if (argc > callbackIndex) {
LaunchCallbackApp(argv[5], argc - callbackIndex, argv + callbackIndex,
sUsingService);
}
return 1;
}
HANDLE callbackFile = INVALID_HANDLE_VALUE;
if (argc > callbackIndex) {
// If the callback executable is specified it must exist for a successful
// update. It is important we null out the whole buffer here because
// later we make the assumption that the callback application is inside
// the apply-to dir. If we don't have a fully null'ed out buffer it can
// lead to stack corruption which causes crashes and other problems.
NS_tchar callbackLongPath[MAXPATHLEN];
ZeroMemory(callbackLongPath, sizeof(callbackLongPath));
NS_tchar* targetPath = argv[callbackIndex];
NS_tchar buffer[MAXPATHLEN * 2] = {NS_T('\0')};
size_t bufferLeft = MAXPATHLEN * 2;
if (sReplaceRequest) {
// In case of replace requests, we should look for the callback file in
// the destination directory.
size_t commonPrefixLength =
PathCommonPrefixW(argv[callbackIndex], gInstallDirPath, nullptr);
NS_tchar* p = buffer;
NS_tstrncpy(p, argv[callbackIndex], commonPrefixLength);
p += commonPrefixLength;
bufferLeft -= commonPrefixLength;
NS_tstrncpy(p, gInstallDirPath + commonPrefixLength, bufferLeft);
size_t len = NS_tstrlen(gInstallDirPath + commonPrefixLength);
p += len;
bufferLeft -= len;
*p = NS_T('\\');
++p;
bufferLeft--;
*p = NS_T('\0');
NS_tchar installDir[MAXPATHLEN];
NS_tstrcpy(installDir, gInstallDirPath);
size_t callbackPrefixLength =
PathCommonPrefixW(argv[callbackIndex], installDir, nullptr);
NS_tstrncpy(p,
argv[callbackIndex] +
std::max(callbackPrefixLength, commonPrefixLength),
bufferLeft);
targetPath = buffer;
}
if (!GetLongPathNameW(
targetPath, callbackLongPath,
sizeof(callbackLongPath) / sizeof(callbackLongPath[0]))) {
WriteStatusFile(WRITE_ERROR_CALLBACK_PATH);
LOG(("NS_main: unable to find callback file: " LOG_S, targetPath));
output_finish();
EXIT_WHEN_ELEVATED(elevatedLockFilePath, updateLockFileHandle, 1);
if (argc > callbackIndex) {
LaunchCallbackApp(argv[5], argc - callbackIndex, argv + callbackIndex,
sUsingService);
}
return 1;
}
// Doing this is only necessary when we're actually applying a patch.
if (!sReplaceRequest) {
int len = NS_tstrlen(applyDirLongPath);
NS_tchar* s = callbackLongPath;
NS_tchar* d = gCallbackRelPath;
// advance to the apply to directory and advance past the trailing
// backslash if present.
s += len;
if (*s == NS_T('\\')) {
++s;
}
// Copy the string and replace backslashes with forward slashes along
// the way.
do {
if (*s == NS_T('\\')) {
*d = NS_T('/');
} else {
*d = *s;
}
++s;
++d;
} while (*s);
*d = NS_T('\0');
++d;
const size_t callbackBackupPathBufSize =
sizeof(gCallbackBackupPath) / sizeof(gCallbackBackupPath[0]);
const int callbackBackupPathLen =
NS_tsnprintf(gCallbackBackupPath, callbackBackupPathBufSize,
NS_T("%s" CALLBACK_BACKUP_EXT), argv[callbackIndex]);
if (callbackBackupPathLen < 0 ||
callbackBackupPathLen >=
static_cast<int>(callbackBackupPathBufSize)) {
WriteStatusFile(USAGE_ERROR);
LOG(("NS_main: callback backup path truncated"));
output_finish();
// Don't attempt to launch the callback when the callback path is
// longer than expected.
EXIT_WHEN_ELEVATED(elevatedLockFilePath, updateLockFileHandle, 1);
return 1;
}
// Make a copy of the callback executable so it can be read when
// patching.
if (!CopyFileW(argv[callbackIndex], gCallbackBackupPath, false)) {
DWORD copyFileError = GetLastError();
if (copyFileError == ERROR_ACCESS_DENIED) {
WriteStatusFile(WRITE_ERROR_ACCESS_DENIED);
} else {
WriteStatusFile(WRITE_ERROR_CALLBACK_APP);
}
LOG(("NS_main: failed to copy callback file " LOG_S
" into place at " LOG_S,
argv[callbackIndex], gCallbackBackupPath));
output_finish();
EXIT_WHEN_ELEVATED(elevatedLockFilePath, updateLockFileHandle, 1);
LaunchCallbackApp(argv[callbackIndex], argc - callbackIndex,
argv + callbackIndex, sUsingService);
return 1;
}
// Since the process may be signaled as exited by WaitForSingleObject
// before the release of the executable image try to lock the main
// executable file multiple times before giving up. If we end up giving
// up, we won't fail the update.
const int max_retries = 10;
int retries = 1;
DWORD lastWriteError = 0;
do {
// By opening a file handle wihout FILE_SHARE_READ to the callback
// executable, the OS will prevent launching the process while it is
// being updated.
callbackFile = CreateFileW(targetPath, DELETE | GENERIC_WRITE,
// allow delete, rename, and write
FILE_SHARE_DELETE | FILE_SHARE_WRITE,
nullptr, OPEN_EXISTING, 0, nullptr);
if (callbackFile != INVALID_HANDLE_VALUE) {
break;
}
lastWriteError = GetLastError();
LOG(
("NS_main: callback app file open attempt %d failed. "
"File: " LOG_S ". Last error: %lu",
retries, targetPath, lastWriteError));
Sleep(100);
} while (++retries <= max_retries);
// CreateFileW will fail if the callback executable is already in use.
if (callbackFile == INVALID_HANDLE_VALUE) {
bool proceedWithoutExclusive = true;
// Fail the update if the last error was not a sharing violation.
if (lastWriteError != ERROR_SHARING_VIOLATION) {
LOG((
"NS_main: callback app file in use, failed to exclusively open "
"executable file: " LOG_S,
argv[callbackIndex]));
if (lastWriteError == ERROR_ACCESS_DENIED) {
WriteStatusFile(WRITE_ERROR_ACCESS_DENIED);
} else {
WriteStatusFile(WRITE_ERROR_CALLBACK_APP);
}
proceedWithoutExclusive = false;
}
// Fail even on sharing violation from a background task, since a
// background task has a higher risk of interfering with a running
// app. Note that this does not apply when staging (when an exclusive
// lock isn't necessary), as there is no callback.
if (lastWriteError == ERROR_SHARING_VIOLATION && sUpdateSilently) {
LOG((
"NS_main: callback app file in use, failed to exclusively open "
"executable file from background task: " LOG_S,
argv[callbackIndex]));
WriteStatusFile(BACKGROUND_TASK_SHARING_VIOLATION);
proceedWithoutExclusive = false;
}
if (!proceedWithoutExclusive) {
if (NS_tremove(gCallbackBackupPath) && errno != ENOENT) {
LOG(
("NS_main: unable to remove backup of callback app file, "
"path: " LOG_S,
gCallbackBackupPath));
}
output_finish();
EXIT_WHEN_ELEVATED(elevatedLockFilePath, updateLockFileHandle, 1);
LaunchCallbackApp(argv[5], argc - callbackIndex,
argv + callbackIndex, sUsingService);
return 1;
}
LOG(
("NS_main: callback app file in use, continuing without "
"exclusive access for executable file: " LOG_S,
argv[callbackIndex]));
}
}
}
// DELETE_DIR is not required when performing a staged update or replace
// request; it can be used during a replace request but then it doesn't
// use gDeleteDirPath.
if (!sStagedUpdate && !sReplaceRequest) {
// The directory to move files that are in use to on Windows. This
// directory will be deleted after the update is finished, on OS reboot
// using MoveFileEx if it contains files that are in use, or by the post
// update process after the update finishes. On Windows when performing a
// normal update (e.g. the update is not a staged update and is not a
// replace request) gWorkingDirPath is the same as gInstallDirPath and
// gWorkingDirPath is used because it is the destination directory.
NS_tsnprintf(gDeleteDirPath,
sizeof(gDeleteDirPath) / sizeof(gDeleteDirPath[0]),
NS_T("%s/%s"), gWorkingDirPath, DELETE_DIR);
if (NS_taccess(gDeleteDirPath, F_OK)) {
NS_tmkdir(gDeleteDirPath, 0755);
}
}
#endif /* XP_WIN */
// Run update process on a background thread. ShowProgressUI may return
// before QuitProgressUI has been called, so wait for UpdateThreadFunc to
// terminate. Avoid showing the progress UI when staging an update, or if
// this is an elevated process on macOS.
Thread t;
if (t.Run(UpdateThreadFunc, nullptr) == 0) {
if (!sStagedUpdate && !sReplaceRequest && !sUpdateSilently
#ifdef XP_MACOSX
&& !isElevated
#endif
) {
ShowProgressUI();
}
}
t.Join();
#ifdef XP_WIN
if (argc > callbackIndex && !sReplaceRequest) {
if (callbackFile != INVALID_HANDLE_VALUE) {
CloseHandle(callbackFile);
}
// Remove the copy of the callback executable.
if (NS_tremove(gCallbackBackupPath) && errno != ENOENT) {
LOG(
("NS_main: non-fatal error removing backup of callback app file, "
"path: " LOG_S,
gCallbackBackupPath));
}
}
if (!sStagedUpdate && !sReplaceRequest && _wrmdir(gDeleteDirPath)) {
LOG(("NS_main: unable to remove directory: " LOG_S ", err: %d",
DELETE_DIR, errno));
// The directory probably couldn't be removed due to it containing files
// that are in use and will be removed on OS reboot. The call to remove
// the directory on OS reboot is done after the calls to remove the files
// so the files are removed first on OS reboot since the directory must be
// empty for the directory removal to be successful. The MoveFileEx call
// to remove the directory on OS reboot will fail if the process doesn't
// have write access to the HKEY_LOCAL_MACHINE registry key but this is ok
// since the installer / uninstaller will delete the directory along with
// its contents after an update is applied, on reinstall, and on
// uninstall.
if (MoveFileEx(gDeleteDirPath, nullptr, MOVEFILE_DELAY_UNTIL_REBOOT)) {
LOG(("NS_main: directory will be removed on OS reboot: " LOG_S,
DELETE_DIR));
} else {
LOG(
("NS_main: failed to schedule OS reboot removal of "
"directory: " LOG_S,
DELETE_DIR));
}
}
#endif /* XP_WIN */
} // if (!isDMGInstall)
#ifdef XP_MACOSX
if (isElevated) {
SetGroupOwnershipAndPermissions(gInstallDirPath);
freeArguments(argc, argv);
CleanupElevatedMacUpdate(false);
} else if (IsOwnedByGroupAdmin(gInstallDirPath)) {
// If the group ownership of the Firefox .app bundle was set to the "admin"
// group during a previous elevated update, we need to ensure that all files
// in the bundle have group ownership of "admin" as well as write permission
// for the group to not break updates in the future.
SetGroupOwnershipAndPermissions(gInstallDirPath);
}
#endif /* XP_MACOSX */
LOG(("Running LaunchCallbackAndPostProcessApps"));
int retVal = LaunchCallbackAndPostProcessApps(argc, argv, callbackIndex
#ifdef XP_WIN
,
elevatedLockFilePath,
updateLockFileHandle
#elif XP_MACOSX
,
std::move(umaskContext)
#endif
);
return retVal ? retVal : (gSucceeded ? 0 : 1);
}
class ActionList {
public:
ActionList() : mFirst(nullptr), mLast(nullptr), mCount(0) {}
~ActionList();
void Append(Action* action);
int Prepare();
int Execute();
void Finish(int status);
private:
Action* mFirst;
Action* mLast;
int mCount;
};
ActionList::~ActionList() {
Action* a = mFirst;
while (a) {
Action* b = a;
a = a->mNext;
delete b;
}
}
void ActionList::Append(Action* action) {
if (mLast) {
mLast->mNext = action;
} else {
mFirst = action;
}
mLast = action;
mCount++;
}
int ActionList::Prepare() {
// If the action list is empty then we should fail in order to signal that
// something has gone wrong. Otherwise we report success when nothing is
if (mCount == 0) {
LOG(("empty action list"));
return MAR_ERROR_EMPTY_ACTION_LIST;
}
Action* a = mFirst;
int i = 0;
while (a) {
int rv = a->Prepare();
if (rv) {
return rv;
}
float percent = float(++i) / float(mCount);
UpdateProgressUI(PROGRESS_PREPARE_SIZE * percent);
a = a->mNext;
}
return OK;
}
int ActionList::Execute() {
int currentProgress = 0, maxProgress = 0;
Action* a = mFirst;
while (a) {
maxProgress += a->mProgressCost;
a = a->mNext;
}
a = mFirst;
while (a) {
int rv = a->Execute();
if (rv) {
LOG(("### execution failed"));
return rv;
}
currentProgress += a->mProgressCost;
float percent = float(currentProgress) / float(maxProgress);
UpdateProgressUI(PROGRESS_PREPARE_SIZE + PROGRESS_EXECUTE_SIZE * percent);
a = a->mNext;
}
return OK;
}
void ActionList::Finish(int status) {
Action* a = mFirst;
int i = 0;
while (a) {
a->Finish(status);
float percent = float(++i) / float(mCount);
UpdateProgressUI(PROGRESS_PREPARE_SIZE + PROGRESS_EXECUTE_SIZE +
PROGRESS_FINISH_SIZE * percent);
a = a->mNext;
}
if (status == OK) {
gSucceeded = true;
}
}
#ifdef XP_WIN
int add_dir_entries(const NS_tchar* dirpath, ActionList* list) {
int rv = OK;
WIN32_FIND_DATAW finddata;
HANDLE hFindFile;
NS_tchar searchspec[MAXPATHLEN];
NS_tchar foundpath[MAXPATHLEN];
NS_tsnprintf(searchspec, sizeof(searchspec) / sizeof(searchspec[0]),
NS_T("%s*"), dirpath);
mozilla::UniquePtr<const NS_tchar> pszSpec(get_full_path(searchspec));
hFindFile = FindFirstFileW(pszSpec.get(), &finddata);
if (hFindFile != INVALID_HANDLE_VALUE) {
do {
// Don't process the current or parent directory.
if (NS_tstrcmp(finddata.cFileName, NS_T(".")) == 0 ||
NS_tstrcmp(finddata.cFileName, NS_T("..")) == 0) {
continue;
}
NS_tsnprintf(foundpath, sizeof(foundpath) / sizeof(foundpath[0]),
NS_T("%s%s"), dirpath, finddata.cFileName);
if (finddata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
NS_tsnprintf(foundpath, sizeof(foundpath) / sizeof(foundpath[0]),
NS_T("%s/"), foundpath);
// Recurse into the directory.
rv = add_dir_entries(foundpath, list);
if (rv) {
LOG(("add_dir_entries error: " LOG_S ", err: %d", foundpath, rv));
FindClose(hFindFile);
return rv;
}
} else {
// Add the file to be removed to the ActionList.
NS_tchar* quotedpath = get_quoted_path(foundpath);
if (!quotedpath) {
FindClose(hFindFile);
return PARSE_ERROR;
}
mozilla::UniquePtr<Action> action(new RemoveFile());
rv = action->Parse(quotedpath);
if (rv) {
LOG(("add_dir_entries Parse error on recurse: " LOG_S ", err: %d",
quotedpath, rv));
free(quotedpath);
FindClose(hFindFile);
return rv;
}
free(quotedpath);
list->Append(action.release());
}
} while (FindNextFileW(hFindFile, &finddata) != 0);
FindClose(hFindFile);
{
// Add the directory to be removed to the ActionList.
NS_tchar* quotedpath = get_quoted_path(dirpath);
if (!quotedpath) {
return PARSE_ERROR;
}
mozilla::UniquePtr<Action> action(new RemoveDir());
rv = action->Parse(quotedpath);
if (rv) {
LOG(("add_dir_entries Parse error on close: " LOG_S ", err: %d",
quotedpath, rv));
} else {
list->Append(action.release());
}
free(quotedpath);
}
}
return rv;
}
#elif defined(HAVE_FTS_H)
int add_dir_entries(const NS_tchar* dirpath, ActionList* list) {
int rv = OK;
FTS* ftsdir;
FTSENT* ftsdirEntry;
mozilla::UniquePtr<NS_tchar[]> searchpath(get_full_path(dirpath));
// Remove the trailing slash so the paths don't contain double slashes. The
// existence of the slash has already been checked in DoUpdate.
searchpath[NS_tstrlen(searchpath.get()) - 1] = NS_T('\0');
char* const pathargv[] = {searchpath.get(), nullptr};
// FTS_NOCHDIR is used so relative paths from the destination directory are
// returned.
if (!(ftsdir = fts_open(pathargv,
FTS_PHYSICAL | FTS_NOSTAT | FTS_XDEV | FTS_NOCHDIR,
nullptr))) {
return UNEXPECTED_FILE_OPERATION_ERROR;
}
while ((ftsdirEntry = fts_read(ftsdir)) != nullptr) {
NS_tchar foundpath[MAXPATHLEN];
NS_tchar* quotedpath = nullptr;
mozilla::UniquePtr<Action> action;
switch (ftsdirEntry->fts_info) {
// Filesystem objects that shouldn't be in the application's directories
case FTS_SL:
case FTS_SLNONE:
case FTS_DEFAULT:
LOG(("add_dir_entries: found a non-standard file: " LOG_S,
ftsdirEntry->fts_path));
// Fall through and try to remove as a file
[[fallthrough]];
// Files
case FTS_F:
case FTS_NSOK:
// Add the file to be removed to the ActionList.
NS_tsnprintf(foundpath, sizeof(foundpath) / sizeof(foundpath[0]),
NS_T("%s"), ftsdirEntry->fts_accpath);
quotedpath = get_quoted_path(get_relative_path(foundpath));
if (!quotedpath) {
rv = UPDATER_QUOTED_PATH_MEM_ERROR;
break;
}
action.reset(new RemoveFile());
rv = action->Parse(quotedpath);
free(quotedpath);
if (!rv) {
list->Append(action.release());
}
break;
// Directories
case FTS_DP:
// Add the directory to be removed to the ActionList.
NS_tsnprintf(foundpath, sizeof(foundpath) / sizeof(foundpath[0]),
NS_T("%s/"), ftsdirEntry->fts_accpath);
quotedpath = get_quoted_path(get_relative_path(foundpath));
if (!quotedpath) {
rv = UPDATER_QUOTED_PATH_MEM_ERROR;
break;
}
action.reset(new RemoveDir());
rv = action->Parse(quotedpath);
free(quotedpath);
if (!rv) {
list->Append(action.release());
}
break;
// Errors
case FTS_DNR:
case FTS_NS:
// ENOENT is an acceptable error for FTS_DNR and FTS_NS and means that
// we're racing with ourselves. Though strange, the entry will be
// removed anyway.
if (ENOENT == ftsdirEntry->fts_errno) {
rv = OK;
break;
}
[[fallthrough]];
case FTS_ERR:
rv = UNEXPECTED_FILE_OPERATION_ERROR;
LOG(("add_dir_entries: fts_read() error: " LOG_S ", err: %d",
ftsdirEntry->fts_path, ftsdirEntry->fts_errno));
break;
case FTS_DC:
rv = UNEXPECTED_FILE_OPERATION_ERROR;
LOG(("add_dir_entries: fts_read() returned FT_DC: " LOG_S,
ftsdirEntry->fts_path));
break;
default:
// FTS_D is ignored and FTS_DP is used instead (post-order).
rv = OK;
break;
}
if (rv != OK) {
break;
}
}
fts_close(ftsdir);
return rv;
}
#else
int add_dir_entries(const NS_tchar* dirpath, ActionList* list) {
int rv = OK;
NS_tchar foundpath[PATH_MAX];
struct {
dirent dent_buffer;
char chars[NAME_MAX];
} ent_buf;
struct dirent* ent;
mozilla::UniquePtr<NS_tchar[]> searchpath(get_full_path(dirpath));
DIR* dir = opendir(searchpath.get());
if (!dir) {
LOG(("add_dir_entries error on opendir: " LOG_S ", err: %d",
searchpath.get(), errno));
return UNEXPECTED_FILE_OPERATION_ERROR;
}
while (readdir_r(dir, (dirent*)&ent_buf, &ent) == 0 && ent) {
if ((strcmp(ent->d_name, ".") == 0) || (strcmp(ent->d_name, "..") == 0)) {
continue;
}
NS_tsnprintf(foundpath, sizeof(foundpath) / sizeof(foundpath[0]),
NS_T("%s%s"), searchpath.get(), ent->d_name);
struct stat64 st_buf;
int test = stat64(foundpath, &st_buf);
if (test) {
closedir(dir);
return UNEXPECTED_FILE_OPERATION_ERROR;
}
if (S_ISDIR(st_buf.st_mode)) {
NS_tsnprintf(foundpath, sizeof(foundpath) / sizeof(foundpath[0]),
NS_T("%s%s/"), dirpath, ent->d_name);
// Recurse into the directory.
rv = add_dir_entries(foundpath, list);
if (rv) {
LOG(("add_dir_entries error: " LOG_S ", err: %d", foundpath, rv));
closedir(dir);
return rv;
}
} else {
// Add the file to be removed to the ActionList.
NS_tchar* quotedpath = get_quoted_path(get_relative_path(foundpath));
if (!quotedpath) {
closedir(dir);
return PARSE_ERROR;
}
mozilla::UniquePtr<Action> action(new RemoveFile());
rv = action->Parse(quotedpath);
if (rv) {
LOG(("add_dir_entries Parse error on recurse: " LOG_S ", err: %d",
quotedpath, rv));
free(quotedpath);
closedir(dir);
return rv;
}
free(quotedpath);
list->Append(action.release());
}
}
closedir(dir);
// Add the directory to be removed to the ActionList.
NS_tchar* quotedpath = get_quoted_path(get_relative_path(dirpath));
if (!quotedpath) {
return PARSE_ERROR;
}
mozilla::UniquePtr<Action> action(new RemoveDir());
rv = action->Parse(quotedpath);
if (rv) {
LOG(("add_dir_entries Parse error on close: " LOG_S ", err: %d", quotedpath,
rv));
} else {
list->Append(action.release());
}
free(quotedpath);
return rv;
}
#endif
/*
* Gets the contents of an update manifest file. The return value is malloc'd
* and it is the responsibility of the caller to free it.
*
* @param manifest
* The full path to the manifest file.
* @return On success the contents of the manifest and nullptr otherwise.
*/
static NS_tchar* GetManifestContents(const NS_tchar* manifest) {
AutoFile mfile(NS_tfopen(manifest, NS_T("rb")));
if (mfile == nullptr) {
LOG(("GetManifestContents: error opening manifest file: " LOG_S, manifest));
return nullptr;
}
struct stat ms;
int rv = fstat(fileno((FILE*)mfile), &ms);
if (rv) {
LOG(("GetManifestContents: error stating manifest file: " LOG_S, manifest));
return nullptr;
}
char* mbuf = (char*)malloc(ms.st_size + 1);
if (!mbuf) {
return nullptr;
}
size_t r = ms.st_size;
char* rb = mbuf;
while (r) {
const size_t count = mmin(SSIZE_MAX, r);
size_t c = fread(rb, 1, count, mfile);
if (c != count) {
LOG(("GetManifestContents: error reading manifest file: " LOG_S,
manifest));
free(mbuf);
return nullptr;
}
r -= c;
rb += c;
}
*rb = '\0';
#ifndef XP_WIN
return mbuf;
#else
NS_tchar* wrb = (NS_tchar*)malloc((ms.st_size + 1) * sizeof(NS_tchar));
if (!wrb) {
free(mbuf);
return nullptr;
}
if (!MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, mbuf, -1, wrb,
ms.st_size + 1)) {
LOG(("GetManifestContents: error converting utf8 to utf16le: %lu",
GetLastError()));
free(mbuf);
free(wrb);
return nullptr;
}
free(mbuf);
return wrb;
#endif
}
int AddPreCompleteActions(ActionList* list) {
#ifdef XP_MACOSX
mozilla::UniquePtr<NS_tchar[]> manifestPath(
get_full_path(NS_T("Contents/Resources/precomplete")));
#else
mozilla::UniquePtr<NS_tchar[]> manifestPath(
get_full_path(NS_T("precomplete")));
#endif
NS_tchar* buf = GetManifestContents(manifestPath.get());
if (!buf) {
LOG(
("AddPreCompleteActions: error getting contents of precomplete "
"manifest"));
// Applications aren't required to have a precomplete manifest. The mar
// generation scripts enforce the presence of a precomplete manifest.
return OK;
}
NS_tchar* rb = buf;
int rv;
NS_tchar* line;
while ((line = mstrtok(kNL, &rb)) != 0) {
// skip comments
if (*line == NS_T('#')) {
continue;
}
NS_tchar* token = mstrtok(kWhitespace, &line);
if (!token) {
LOG(("AddPreCompleteActions: token not found in manifest"));
free(buf);
return PARSE_ERROR;
}
Action* action = nullptr;
if (NS_tstrcmp(token, NS_T("remove")) == 0) { // rm file
action = new RemoveFile();
} else if (NS_tstrcmp(token, NS_T("remove-cc")) ==
0) { // no longer supported
continue;
} else if (NS_tstrcmp(token, NS_T("rmdir")) == 0) { // rmdir if empty
action = new RemoveDir();
} else {
LOG(("AddPreCompleteActions: unknown token: " LOG_S, token));
free(buf);
return PARSE_ERROR;
}
if (!action) {
free(buf);
return BAD_ACTION_ERROR;
}
rv = action->Parse(line);
if (rv) {
delete action;
free(buf);
return rv;
}
list->Append(action);
}
free(buf);
return OK;
}
int DoUpdate() {
NS_tchar manifest[MAXPATHLEN];
NS_tsnprintf(manifest, sizeof(manifest) / sizeof(manifest[0]),
NS_T("%s/updating/update.manifest"), gWorkingDirPath);
ensure_parent_dir(manifest);
// extract the manifest
int rv = gArchiveReader.ExtractFile("updatev3.manifest", manifest);
if (rv) {
LOG(("DoUpdate: error extracting manifest file"));
return rv;
}
NS_tchar* buf = GetManifestContents(manifest);
// The manifest is located in the <working_dir>/updating directory which is
// removed after the update has finished so don't delete it here.
if (!buf) {
LOG(("DoUpdate: error opening manifest file: " LOG_S, manifest));
return READ_ERROR;
}
NS_tchar* rb = buf;
ActionList list;
NS_tchar* line;
bool isFirstAction = true;
while ((line = mstrtok(kNL, &rb)) != 0) {
// skip comments
if (*line == NS_T('#')) {
continue;
}
NS_tchar* token = mstrtok(kWhitespace, &line);
if (!token) {
LOG(("DoUpdate: token not found in manifest"));
free(buf);
return PARSE_ERROR;
}
if (isFirstAction) {
isFirstAction = false;
// The update manifest isn't required to have a type declaration. The mar
// generation scripts enforce the presence of the type declaration.
if (NS_tstrcmp(token, NS_T("type")) == 0) {
const NS_tchar* type = mstrtok(kQuote, &line);
LOG(("UPDATE TYPE " LOG_S, type));
if (NS_tstrcmp(type, NS_T("complete")) == 0) {
rv = AddPreCompleteActions(&list);
if (rv) {
free(buf);
return rv;
}
}
continue;
}
}
Action* action = nullptr;
if (NS_tstrcmp(token, NS_T("remove")) == 0) { // rm file
action = new RemoveFile();
} else if (NS_tstrcmp(token, NS_T("rmdir")) == 0) { // rmdir if empty
action = new RemoveDir();
} else if (NS_tstrcmp(token, NS_T("rmrfdir")) == 0) { // rmdir recursive
const NS_tchar* reldirpath = mstrtok(kQuote, &line);
if (!reldirpath) {
free(buf);
return PARSE_ERROR;
}
if (reldirpath[NS_tstrlen(reldirpath) - 1] != NS_T('/')) {
free(buf);
return PARSE_ERROR;
}
rv = add_dir_entries(reldirpath, &list);
if (rv) {
free(buf);
return rv;
}
continue;
} else if (NS_tstrcmp(token, NS_T("add")) == 0) {
action = new AddFile();
} else if (NS_tstrcmp(token, NS_T("patch")) == 0) {
action = new PatchFile();
} else if (NS_tstrcmp(token, NS_T("add-if")) == 0) { // Add if exists
action = new AddIfFile();
} else if (NS_tstrcmp(token, NS_T("add-if-not")) ==
0) { // Add if not exists
action = new AddIfNotFile();
} else if (NS_tstrcmp(token, NS_T("patch-if")) == 0) { // Patch if exists
action = new PatchIfFile();
} else {
LOG(("DoUpdate: unknown token: " LOG_S, token));
free(buf);
return PARSE_ERROR;
}
if (!action) {
free(buf);
return BAD_ACTION_ERROR;
}
rv = action->Parse(line);
if (rv) {
delete action;
free(buf);
return rv;
}
list.Append(action);
}
rv = list.Prepare();
if (rv) {
free(buf);
return rv;
}
rv = list.Execute();
list.Finish(rv);
free(buf);
return rv;
}