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Diffstat (limited to '')
| -rw-r--r-- | toolkit/mozapps/update/updater/updater.cpp | 4745 |
1 files changed, 4745 insertions, 0 deletions
diff --git a/toolkit/mozapps/update/updater/updater.cpp b/toolkit/mozapps/update/updater/updater.cpp new file mode 100644 index 0000000000..732416c7ce --- /dev/null +++ b/toolkit/mozapps/update/updater/updater.cpp @@ -0,0 +1,4745 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/** + * 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 "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 LaunchChild(int argc, const char** argv); +void LaunchMacPostProcess(const char* aAppBundle); +bool ObtainUpdaterArguments(int* argc, char*** argv); +bool ServeElevatedUpdate(int argc, const char** argv); +void SetGroupOwnershipAndPermissions(const char* aAppBundle); +bool PerformInstallationFromDMG(int argc, char** argv); +struct UpdateServerThreadArgs { + int argc; + const NS_tchar** argv; +}; +#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(XP_WIN) && !defined(XP_MACOSX) +# 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() { + if (mFile != nullptr) { + fclose(mFile); + } + } + + AutoFile& operator=(FILE* file) { + if (mFile != 0) { + fclose(mFile); + } + mFile = file; + return *this; + } + + operator FILE*() { return mFile; } + + FILE* get() { return mFile; } + + private: + FILE* mFile; +}; + +struct MARChannelStringTable { + MARChannelStringTable() { + MARChannelID = mozilla::MakeUnique<char[]>(1); + MARChannelID[0] = '\0'; + } + + mozilla::UniquePtr<char[]> MARChannelID; +}; + +//----------------------------------------------------------------------------- + +#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; + +// 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.log and update.status file to the update patch +// directory from a secure directory. +static bool gCopyOutputFiles = false; +// Whether to write the update.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 + +#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')}; + NS_tsnprintf(dstLogPath, sizeof(dstLogPath) / sizeof(dstLogPath[0]), + NS_T("%s\\update.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 + // been removed by a separate instruction: bug 311099. + 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 + // been removed by a separate instruction: bug 311099. + 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 + // been removed by a separate instruction: bug 311099. + 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")) { + return false; + } + + WCHAR exefile[MAX_PATH + 1]; + WCHAR exearg[MAX_PATH + 1]; + if (!GetPrivateProfileStringW(L"PostUpdateWin", L"ExeRelPath", nullptr, + exefile, MAX_PATH + 1, inifile)) { + return false; + } + + if (!GetPrivateProfileStringW(L"PostUpdateWin", L"ExeArg", nullptr, exearg, + MAX_PATH + 1, inifile)) { + 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) { + 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'/') { + return false; + } + + WCHAR exefullpath[MAX_PATH + 1] = {L'\0'}; + wcsncpy(exefullpath, installationDir, MAX_PATH); + if (!PathAppendSafe(exefullpath, exefile)) { + return false; + } + + if (!IsValidFullPath(exefullpath)) { + return false; + } + +# if !defined(TEST_UPDATER) && defined(MOZ_MAINTENANCE_SERVICE) + if (sUsingService && + !DoesBinaryMatchAllowedCertificates(installationDir, exefullpath)) { + return false; + } +# endif + + WCHAR dlogFile[MAX_PATH + 1]; + if (!PathGetSiblingFilePath(dlogFile, exefullpath, L"uninstall.update")) { + return false; + } + + WCHAR slogFile[MAX_PATH + 1] = {L'\0'}; + if (gCopyOutputFiles) { + if (!GetSecureOutputFilePath(gPatchDirPath, L".log", slogFile)) { + return false; + } + } else { + wcsncpy(slogFile, updateInfoDir, MAX_PATH); + if (!PathAppendSafe(slogFile, L"update.log")) { + 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) { + 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}; + + 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 + nullptr, // inherit my environment + workingDirectory, &si, &pi); + free(cmdline); + if (ok) { + WaitForSingleObject(pi.hProcess, INFINITE); + CloseHandle(pi.hProcess); + CloseHandle(pi.hThread); + } + 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")); + + // Run from the specified working directory (see bug 312360). + if (NS_tchdir(workingDir) != 0) { + LOG(("Warning: chdir failed")); + } + +#if defined(USE_EXECV) + execv(argv[0], argv); +#elif defined(XP_MACOSX) + LaunchChild(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) { + NS_tchar statusFilePath[MAXPATHLEN + 1] = {NS_T('\0')}; +#if defined(XP_WIN) + if (gUseSecureOutputPath) { + if (!GetSecureOutputFilePath(gPatchDirPath, L".status", statusFilePath)) { + 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)) { + return false; + } +#endif + + AutoFile statusFile(NS_tfopen(statusFilePath, NS_T("wb+"))); + if (statusFile == nullptr) { + return false; + } + + if (fwrite(aStatus, strlen(aStatus), 1, statusFile) != 1) { + 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)) { + 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)) { + return false; + } + + AutoFile file(NS_tfopen(statusFilePath, 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'; + + statusMatch = UpdateStatusIs(buf, expectedStatus, errorCode); + 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 +/** + * This function reads in the ACCEPTED_MAR_CHANNEL_IDS from update-settings.ini + * + * @param path The path to the ini file that is to be read + * @param results A pointer to the location to store the read strings + * @return OK on success + */ +static int ReadMARChannelIDs(const NS_tchar* path, + MARChannelStringTable* results) { + const unsigned int kNumStrings = 1; + const char* kUpdaterKeys = "ACCEPTED_MAR_CHANNEL_IDS\0"; + int result = ReadStrings(path, kUpdaterKeys, kNumStrings, + &results->MARChannelID, "Settings"); + + return result; +} +#endif + +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) { + NS_tchar updateSettingsPath[MAXPATHLEN]; + NS_tsnprintf(updateSettingsPath, + sizeof(updateSettingsPath) / sizeof(updateSettingsPath[0]), +# ifdef XP_MACOSX + NS_T("%s/Contents/Resources/update-settings.ini"), +# else + NS_T("%s/update-settings.ini"), +# endif + gInstallDirPath); + MARChannelStringTable MARStrings; + if (ReadMARChannelIDs(updateSettingsPath, &MARStrings) != OK) { + rv = UPDATE_SETTINGS_FILE_CHANNEL; + } else { + rv = gArchiveReader.VerifyProductInformation( + MARStrings.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); + 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 + , + bool isElevated, + mozilla::UniquePtr<UmaskContext> + umaskContext +#endif +) { +#ifdef XP_MACOSX + umaskContext.reset(); +#endif + + if (argc > callbackIndex) { +#if defined(XP_WIN) + if (gSucceeded) { + if (!LaunchWinPostProcess(gInstallDirPath, gPatchDirPath)) { + fprintf(stderr, "The post update process was not launched"); + } + +# 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) { + StartServiceUpdate(gInstallDirPath); + } +# endif + } + EXIT_WHEN_ELEVATED(elevatedLockFilePath, updateLockFileHandle, 0); +#elif XP_MACOSX + if (!isElevated) { + if (gSucceeded) { + LaunchMacPostProcess(gInstallDirPath); + } +#endif + + LaunchCallbackApp(argv[5], argc - callbackIndex, argv + callbackIndex, + sUsingService); +#ifdef XP_MACOSX + } // if (!isElevated) +#endif /* XP_MACOSX */ +} +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 + + // 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 + // 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)); + + bool isElevated = + strstr(argv[0], "/Library/PrivilegedHelperTools/org.mozilla.updater") != + 0; + if (isElevated) { + if (!ObtainUpdaterArguments(&argc, &argv)) { + // 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(XP_WIN) && !defined(XP_MACOSX) + // On Windows and Mac we rely on native APIs to do verifications so we don't + // need to initialize NSS at all there. + // Otherwise, minimize the amount of NSS we depend on by avoiding all 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); +#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); + + 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, false, + 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\\update.log"), gPatchDirPath); + } +#else + NS_tsnprintf(logFilePath, sizeof(logFilePath) / sizeof(logFilePath[0]), + NS_T("%s/update.log"), gPatchDirPath); +#endif + LogInit(logFilePath); + + 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 + // exit (see bug 1375242) so any fixes to the parent application will + // 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)) { + 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); + + // Even if a file has no sharing access, you can still get its attributes + bool startedFromUnelevatedUpdater = + GetFileAttributesW(elevatedLockFilePath) != INVALID_FILE_ATTRIBUTES; + + // 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 (startedFromUnelevatedUpdater) { + // 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))) { + 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) { + 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); + } +# 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; + } + + // 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; + } + } + + // Make sure the service registry entries for the instsallation 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; +# endif + if (!useService) { + lastFallbackError = FALLBACKKEY_NOKEY_ERROR; + } + } + } else { + useService = false; + lastFallbackError = FALLBACKKEY_REGPATH_ERROR; + } + } + + // 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 + // comamnd 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) { + 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; + } else { + // 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; + } + } + } + } else { + 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, + // see bug 1552853. + 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.jsm. + 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)) { + // 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) { + WaitForSingleObject(sinfo.hProcess, INFINITE); + 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); + } + } + + // 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) { + if (!LaunchWinPostProcess(gInstallDirPath, gPatchDirPath)) { + fprintf(stderr, + "The post update process which runs as the user" + " for service update could not be launched."); + } + } + } + + 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. + 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). +#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(WRITE_ERROR_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 OSX. + 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 */ + + output_finish(); + + int retVal = LaunchCallbackAndPostProcessApps(argc, argv, callbackIndex +#ifdef XP_WIN + , + elevatedLockFilePath, + updateLockFileHandle +#elif XP_MACOSX + , + isElevated, + 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 + // actually done. See bug 327140. + 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)); + return rv; + } + } else { + // Add the file to be removed to the ActionList. + NS_tchar* quotedpath = get_quoted_path(foundpath); + if (!quotedpath) { + 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); + 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) { + 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; +} |