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yolobs-studio/UI/win-update/updater/updater.cpp
Sebastian Ramacher 040dcc3fc2 New upstream version 26.0.2+dfsg1
2020-10-12 22:28:36 +02:00

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/*
* Copyright (c) 2017-2018 Hugh Bailey <obs.jim@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "updater.hpp"
#include <psapi.h>
#include <util/windows/CoTaskMemPtr.hpp>
#include <future>
#include <vector>
#include <string>
#include <mutex>
using namespace std;
/* ----------------------------------------------------------------------- */
HANDLE cancelRequested = nullptr;
HANDLE updateThread = nullptr;
HINSTANCE hinstMain = nullptr;
HWND hwndMain = nullptr;
HCRYPTPROV hProvider = 0;
static bool bExiting = false;
static bool updateFailed = false;
static bool is32bit = false;
static bool downloadThreadFailure = false;
int totalFileSize = 0;
int completedFileSize = 0;
static int completedUpdates = 0;
struct LastError {
DWORD code;
inline LastError() { code = GetLastError(); }
};
void FreeWinHttpHandle(HINTERNET handle)
{
WinHttpCloseHandle(handle);
}
/* ----------------------------------------------------------------------- */
static inline bool is_64bit_windows(void);
static inline bool HasVS2017Redist2()
{
wchar_t base[MAX_PATH];
wchar_t path[MAX_PATH];
WIN32_FIND_DATAW wfd;
HANDLE handle;
int folder = (is32bit && is_64bit_windows()) ? CSIDL_SYSTEMX86
: CSIDL_SYSTEM;
SHGetFolderPathW(NULL, folder, NULL, SHGFP_TYPE_CURRENT, base);
StringCbCopyW(path, sizeof(path), base);
StringCbCatW(path, sizeof(path), L"\\msvcp140.dll");
handle = FindFirstFileW(path, &wfd);
if (handle == INVALID_HANDLE_VALUE) {
return false;
} else {
FindClose(handle);
}
StringCbCopyW(path, sizeof(path), base);
StringCbCatW(path, sizeof(path), L"\\vcruntime140.dll");
handle = FindFirstFileW(path, &wfd);
if (handle == INVALID_HANDLE_VALUE) {
return false;
} else {
FindClose(handle);
}
return true;
}
static bool HasVS2017Redist()
{
PVOID old = nullptr;
bool redirect = !!Wow64DisableWow64FsRedirection(&old);
bool success = HasVS2017Redist2();
if (redirect)
Wow64RevertWow64FsRedirection(old);
return success;
}
static void Status(const wchar_t *fmt, ...)
{
wchar_t str[512];
va_list argptr;
va_start(argptr, fmt);
StringCbVPrintf(str, sizeof(str), fmt, argptr);
SetDlgItemText(hwndMain, IDC_STATUS, str);
va_end(argptr);
}
static void CreateFoldersForPath(const wchar_t *path)
{
wchar_t *p = (wchar_t *)path;
while (*p) {
if (*p == '\\' || *p == '/') {
*p = 0;
CreateDirectory(path, nullptr);
*p = '\\';
}
p++;
}
}
static bool MyCopyFile(const wchar_t *src, const wchar_t *dest)
try {
WinHandle hSrc;
WinHandle hDest;
hSrc = CreateFile(src, GENERIC_READ, 0, nullptr, OPEN_EXISTING,
FILE_FLAG_SEQUENTIAL_SCAN, nullptr);
if (!hSrc.Valid())
throw LastError();
hDest = CreateFile(dest, GENERIC_WRITE, 0, nullptr, CREATE_ALWAYS, 0,
nullptr);
if (!hDest.Valid())
throw LastError();
BYTE buf[65536];
DWORD read, wrote;
for (;;) {
if (!ReadFile(hSrc, buf, sizeof(buf), &read, nullptr))
throw LastError();
if (read == 0)
break;
if (!WriteFile(hDest, buf, read, &wrote, nullptr))
throw LastError();
if (wrote != read)
return false;
}
return true;
} catch (LastError error) {
SetLastError(error.code);
return false;
}
static bool IsSafeFilename(const wchar_t *path)
{
const wchar_t *p = path;
if (!*p)
return false;
if (wcsstr(path, L".."))
return false;
if (*p == '/')
return false;
while (*p) {
if (!isalnum(*p) && *p != '.' && *p != '/' && *p != '_' &&
*p != '-')
return false;
p++;
}
return true;
}
static string QuickReadFile(const wchar_t *path)
{
string data;
WinHandle handle = CreateFileW(path, GENERIC_READ, 0, nullptr,
OPEN_EXISTING, 0, nullptr);
if (!handle.Valid()) {
return string();
}
LARGE_INTEGER size;
if (!GetFileSizeEx(handle, &size)) {
return string();
}
data.resize((size_t)size.QuadPart);
DWORD read;
if (!ReadFile(handle, &data[0], (DWORD)data.size(), &read, nullptr)) {
return string();
}
if (read != size.QuadPart) {
return string();
}
return data;
}
/* ----------------------------------------------------------------------- */
enum state_t {
STATE_INVALID,
STATE_PENDING_DOWNLOAD,
STATE_DOWNLOADING,
STATE_DOWNLOADED,
STATE_INSTALL_FAILED,
STATE_INSTALLED,
};
struct update_t {
wstring sourceURL;
wstring outputPath;
wstring tempPath;
wstring previousFile;
wstring basename;
string packageName;
DWORD fileSize = 0;
BYTE hash[BLAKE2_HASH_LENGTH];
BYTE downloadhash[BLAKE2_HASH_LENGTH];
BYTE my_hash[BLAKE2_HASH_LENGTH];
state_t state = STATE_INVALID;
bool has_hash = false;
bool patchable = false;
inline update_t() {}
inline update_t(const update_t &from)
: sourceURL(from.sourceURL),
outputPath(from.outputPath),
tempPath(from.tempPath),
previousFile(from.previousFile),
basename(from.basename),
packageName(from.packageName),
fileSize(from.fileSize),
state(from.state),
has_hash(from.has_hash),
patchable(from.patchable)
{
memcpy(hash, from.hash, sizeof(hash));
memcpy(downloadhash, from.downloadhash, sizeof(downloadhash));
memcpy(my_hash, from.my_hash, sizeof(my_hash));
}
inline update_t(update_t &&from)
: sourceURL(std::move(from.sourceURL)),
outputPath(std::move(from.outputPath)),
tempPath(std::move(from.tempPath)),
previousFile(std::move(from.previousFile)),
basename(std::move(from.basename)),
packageName(std::move(from.packageName)),
fileSize(from.fileSize),
state(from.state),
has_hash(from.has_hash),
patchable(from.patchable)
{
from.state = STATE_INVALID;
memcpy(hash, from.hash, sizeof(hash));
memcpy(downloadhash, from.downloadhash, sizeof(downloadhash));
memcpy(my_hash, from.my_hash, sizeof(my_hash));
}
void CleanPartialUpdate()
{
if (state == STATE_INSTALL_FAILED || state == STATE_INSTALLED) {
if (!previousFile.empty()) {
DeleteFile(outputPath.c_str());
MyCopyFile(previousFile.c_str(),
outputPath.c_str());
DeleteFile(previousFile.c_str());
} else {
DeleteFile(outputPath.c_str());
}
} else if (state == STATE_DOWNLOADED) {
DeleteFile(tempPath.c_str());
}
}
inline update_t &operator=(const update_t &from)
{
sourceURL = from.sourceURL;
outputPath = from.outputPath;
tempPath = from.tempPath;
previousFile = from.previousFile;
basename = from.basename;
packageName = from.packageName;
fileSize = from.fileSize;
state = from.state;
has_hash = from.has_hash;
patchable = from.patchable;
memcpy(hash, from.hash, sizeof(hash));
memcpy(downloadhash, from.downloadhash, sizeof(downloadhash));
memcpy(my_hash, from.my_hash, sizeof(my_hash));
return *this;
}
};
static vector<update_t> updates;
static mutex updateMutex;
static inline void CleanupPartialUpdates()
{
for (update_t &update : updates)
update.CleanPartialUpdate();
}
/* ----------------------------------------------------------------------- */
bool DownloadWorkerThread()
{
const DWORD tlsProtocols = WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_2;
HttpHandle hSession = WinHttpOpen(L"OBS Studio Updater/2.1",
WINHTTP_ACCESS_TYPE_DEFAULT_PROXY,
WINHTTP_NO_PROXY_NAME,
WINHTTP_NO_PROXY_BYPASS, 0);
if (!hSession) {
downloadThreadFailure = true;
Status(L"Update failed: Couldn't open obsproject.com");
return false;
}
WinHttpSetOption(hSession, WINHTTP_OPTION_SECURE_PROTOCOLS,
(LPVOID)&tlsProtocols, sizeof(tlsProtocols));
HttpHandle hConnect = WinHttpConnect(hSession,
L"cdn-fastly.obsproject.com",
INTERNET_DEFAULT_HTTPS_PORT, 0);
if (!hConnect) {
downloadThreadFailure = true;
Status(L"Update failed: Couldn't connect to cdn-fastly.obsproject.com");
return false;
}
for (;;) {
bool foundWork = false;
unique_lock<mutex> ulock(updateMutex);
for (update_t &update : updates) {
int responseCode;
DWORD waitResult =
WaitForSingleObject(cancelRequested, 0);
if (waitResult == WAIT_OBJECT_0) {
return false;
}
if (update.state != STATE_PENDING_DOWNLOAD)
continue;
update.state = STATE_DOWNLOADING;
ulock.unlock();
foundWork = true;
if (downloadThreadFailure) {
return false;
}
Status(L"Downloading %s", update.outputPath.c_str());
if (!HTTPGetFile(hConnect, update.sourceURL.c_str(),
update.tempPath.c_str(),
L"Accept-Encoding: gzip",
&responseCode)) {
downloadThreadFailure = true;
DeleteFile(update.tempPath.c_str());
Status(L"Update failed: Could not download "
L"%s (error code %d)",
update.outputPath.c_str(), responseCode);
return 1;
}
if (responseCode != 200) {
downloadThreadFailure = true;
DeleteFile(update.tempPath.c_str());
Status(L"Update failed: Could not download "
L"%s (error code %d)",
update.outputPath.c_str(), responseCode);
return 1;
}
BYTE downloadHash[BLAKE2_HASH_LENGTH];
if (!CalculateFileHash(update.tempPath.c_str(),
downloadHash)) {
downloadThreadFailure = true;
DeleteFile(update.tempPath.c_str());
Status(L"Update failed: Couldn't verify "
L"integrity of %s",
update.outputPath.c_str());
return 1;
}
if (memcmp(update.downloadhash, downloadHash, 20)) {
downloadThreadFailure = true;
DeleteFile(update.tempPath.c_str());
Status(L"Update failed: Integrity check "
L"failed on %s",
update.outputPath.c_str());
return 1;
}
ulock.lock();
update.state = STATE_DOWNLOADED;
completedUpdates++;
}
if (!foundWork) {
break;
}
if (downloadThreadFailure) {
return false;
}
}
return true;
}
static bool RunDownloadWorkers(int num)
try {
vector<future<bool>> thread_success_results;
thread_success_results.resize(num);
for (future<bool> &result : thread_success_results) {
result = async(DownloadWorkerThread);
}
for (future<bool> &result : thread_success_results) {
if (!result.get()) {
return false;
}
}
return true;
} catch (...) {
return false;
}
/* ----------------------------------------------------------------------- */
#define WAITIFOBS_SUCCESS 0
#define WAITIFOBS_WRONG_PROCESS 1
#define WAITIFOBS_CANCELLED 2
static inline DWORD WaitIfOBS(DWORD id, const wchar_t *expected)
{
wchar_t path[MAX_PATH];
wchar_t *name;
*path = 0;
WinHandle proc = OpenProcess(PROCESS_QUERY_INFORMATION |
PROCESS_VM_READ | SYNCHRONIZE,
false, id);
if (!proc.Valid())
return WAITIFOBS_WRONG_PROCESS;
if (!GetProcessImageFileName(proc, path, _countof(path)))
return WAITIFOBS_WRONG_PROCESS;
name = wcsrchr(path, L'\\');
if (name)
name += 1;
else
name = path;
if (_wcsnicmp(name, expected, 5) == 0) {
HANDLE hWait[2];
hWait[0] = proc;
hWait[1] = cancelRequested;
int i = WaitForMultipleObjects(2, hWait, false, INFINITE);
if (i == WAIT_OBJECT_0 + 1)
return WAITIFOBS_CANCELLED;
return WAITIFOBS_SUCCESS;
}
return WAITIFOBS_WRONG_PROCESS;
}
static bool WaitForOBS()
{
DWORD proc_ids[1024], needed, count;
const wchar_t *name = is32bit ? L"obs32" : L"obs64";
if (!EnumProcesses(proc_ids, sizeof(proc_ids), &needed)) {
return true;
}
count = needed / sizeof(DWORD);
for (DWORD i = 0; i < count; i++) {
DWORD id = proc_ids[i];
if (id != 0) {
switch (WaitIfOBS(id, name)) {
case WAITIFOBS_SUCCESS:
return true;
case WAITIFOBS_WRONG_PROCESS:
break;
case WAITIFOBS_CANCELLED:
return false;
}
}
}
return true;
}
/* ----------------------------------------------------------------------- */
static inline bool UTF8ToWide(wchar_t *wide, int wideSize, const char *utf8)
{
return !!MultiByteToWideChar(CP_UTF8, 0, utf8, -1, wide, wideSize);
}
static inline bool WideToUTF8(char *utf8, int utf8Size, const wchar_t *wide)
{
return !!WideCharToMultiByte(CP_UTF8, 0, wide, -1, utf8, utf8Size,
nullptr, nullptr);
}
static inline bool FileExists(const wchar_t *path)
{
WIN32_FIND_DATAW wfd;
HANDLE hFind;
hFind = FindFirstFileW(path, &wfd);
if (hFind != INVALID_HANDLE_VALUE)
FindClose(hFind);
return hFind != INVALID_HANDLE_VALUE;
}
static bool NonCorePackageInstalled(const char *name)
{
if (is32bit) {
if (strcmp(name, "obs-browser") == 0) {
return FileExists(
L"obs-plugins\\32bit\\obs-browser.dll");
} else if (strcmp(name, "realsense") == 0) {
return FileExists(L"obs-plugins\\32bit\\win-ivcam.dll");
}
} else {
if (strcmp(name, "obs-browser") == 0) {
return FileExists(
L"obs-plugins\\64bit\\obs-browser.dll");
} else if (strcmp(name, "realsense") == 0) {
return FileExists(L"obs-plugins\\64bit\\win-ivcam.dll");
}
}
return false;
}
static inline bool is_64bit_windows(void)
{
#ifdef _WIN64
return true;
#else
BOOL x86 = false;
bool success = !!IsWow64Process(GetCurrentProcess(), &x86);
return success && !!x86;
#endif
}
static inline bool is_64bit_file(const char *file)
{
if (!file)
return false;
return strstr(file, "64bit") != nullptr ||
strstr(file, "64.dll") != nullptr ||
strstr(file, "64.exe") != nullptr;
}
static inline bool has_str(const char *file, const char *str)
{
return (file && str) ? (strstr(file, str) != nullptr) : false;
}
#define UTF8ToWideBuf(wide, utf8) UTF8ToWide(wide, _countof(wide), utf8)
#define WideToUTF8Buf(utf8, wide) WideToUTF8(utf8, _countof(utf8), wide)
#define UPDATE_URL L"https://cdn-fastly.obsproject.com/update_studio"
static bool AddPackageUpdateFiles(json_t *root, size_t idx,
const wchar_t *tempPath)
{
json_t *package = json_array_get(root, idx);
json_t *name = json_object_get(package, "name");
json_t *files = json_object_get(package, "files");
bool isWin64 = is_64bit_windows();
if (!json_is_array(files))
return true;
if (!json_is_string(name))
return true;
wchar_t wPackageName[512];
const char *packageName = json_string_value(name);
size_t fileCount = json_array_size(files);
if (!UTF8ToWideBuf(wPackageName, packageName))
return false;
if (strcmp(packageName, "core") != 0 &&
!NonCorePackageInstalled(packageName))
return true;
for (size_t j = 0; j < fileCount; j++) {
json_t *file = json_array_get(files, j);
json_t *fileName = json_object_get(file, "name");
json_t *hash = json_object_get(file, "hash");
json_t *size = json_object_get(file, "size");
if (!json_is_string(fileName))
continue;
if (!json_is_string(hash))
continue;
if (!json_is_integer(size))
continue;
const char *fileUTF8 = json_string_value(fileName);
const char *hashUTF8 = json_string_value(hash);
int fileSize = (int)json_integer_value(size);
if (strlen(hashUTF8) != BLAKE2_HASH_LENGTH * 2)
continue;
if (!isWin64 && is_64bit_file(fileUTF8))
continue;
/* ignore update files of opposite arch to reduce download */
if ((is32bit && has_str(fileUTF8, "/64bit/")) ||
(!is32bit && has_str(fileUTF8, "/32bit/")))
continue;
/* convert strings to wide */
wchar_t sourceURL[1024];
wchar_t updateFileName[MAX_PATH];
wchar_t updateHashStr[BLAKE2_HASH_STR_LENGTH];
wchar_t tempFilePath[MAX_PATH];
if (!UTF8ToWideBuf(updateFileName, fileUTF8))
continue;
if (!UTF8ToWideBuf(updateHashStr, hashUTF8))
continue;
/* make sure paths are safe */
if (!IsSafeFilename(updateFileName)) {
Status(L"Update failed: Unsafe path '%s' found in "
L"manifest",
updateFileName);
return false;
}
StringCbPrintf(sourceURL, sizeof(sourceURL), L"%s/%s/%s",
UPDATE_URL, wPackageName, updateFileName);
StringCbPrintf(tempFilePath, sizeof(tempFilePath), L"%s\\%s",
tempPath, updateHashStr);
/* Check file hash */
BYTE existingHash[BLAKE2_HASH_LENGTH];
wchar_t fileHashStr[BLAKE2_HASH_STR_LENGTH];
bool has_hash;
/* We don't really care if this fails, it's just to avoid
* wasting bandwidth by downloading unmodified files */
if (CalculateFileHash(updateFileName, existingHash)) {
HashToString(existingHash, fileHashStr);
if (wcscmp(fileHashStr, updateHashStr) == 0)
continue;
has_hash = true;
} else {
has_hash = false;
}
/* Add update file */
update_t update;
update.fileSize = fileSize;
update.basename = updateFileName;
update.outputPath = updateFileName;
update.tempPath = tempFilePath;
update.sourceURL = sourceURL;
update.packageName = packageName;
update.state = STATE_PENDING_DOWNLOAD;
update.patchable = false;
StringToHash(updateHashStr, update.downloadhash);
memcpy(update.hash, update.downloadhash, sizeof(update.hash));
update.has_hash = has_hash;
if (has_hash)
StringToHash(fileHashStr, update.my_hash);
updates.push_back(move(update));
totalFileSize += fileSize;
}
return true;
}
static void UpdateWithPatchIfAvailable(const char *name, const char *hash,
const char *source, int size)
{
wchar_t widePatchableFilename[MAX_PATH];
wchar_t widePatchHash[MAX_PATH];
wchar_t sourceURL[1024];
wchar_t patchHashStr[BLAKE2_HASH_STR_LENGTH];
if (strncmp(source, "https://cdn-fastly.obsproject.com/", 34) != 0)
return;
string patchPackageName = name;
const char *slash = strchr(name, '/');
if (!slash)
return;
patchPackageName.resize(slash - name);
name = slash + 1;
if (!UTF8ToWideBuf(widePatchableFilename, name))
return;
if (!UTF8ToWideBuf(widePatchHash, hash))
return;
if (!UTF8ToWideBuf(sourceURL, source))
return;
if (!UTF8ToWideBuf(patchHashStr, hash))
return;
for (update_t &update : updates) {
if (update.packageName != patchPackageName)
continue;
if (update.basename != widePatchableFilename)
continue;
StringToHash(patchHashStr, update.downloadhash);
/* Replace the source URL with the patch file, mark it as
* patchable, and re-calculate download size */
totalFileSize -= (update.fileSize - size);
update.sourceURL = sourceURL;
update.fileSize = size;
update.patchable = true;
break;
}
}
static bool UpdateFile(update_t &file)
{
wchar_t oldFileRenamedPath[MAX_PATH];
if (file.patchable)
Status(L"Updating %s...", file.outputPath.c_str());
else
Status(L"Installing %s...", file.outputPath.c_str());
/* Check if we're replacing an existing file or just installing a new
* one */
DWORD attribs = GetFileAttributes(file.outputPath.c_str());
if (attribs != INVALID_FILE_ATTRIBUTES) {
wchar_t *curFileName = nullptr;
wchar_t baseName[MAX_PATH];
StringCbCopy(baseName, sizeof(baseName),
file.outputPath.c_str());
curFileName = wcsrchr(baseName, '/');
if (curFileName) {
curFileName[0] = '\0';
curFileName++;
} else
curFileName = baseName;
/* Backup the existing file in case a rollback is needed */
StringCbCopy(oldFileRenamedPath, sizeof(oldFileRenamedPath),
file.outputPath.c_str());
StringCbCat(oldFileRenamedPath, sizeof(oldFileRenamedPath),
L".old");
if (!MyCopyFile(file.outputPath.c_str(), oldFileRenamedPath)) {
int is_sharing_violation =
(GetLastError() == ERROR_SHARING_VIOLATION);
if (is_sharing_violation)
Status(L"Update failed: %s is still in use. "
L"Close all programs and try again.",
curFileName);
else
Status(L"Update failed: Couldn't backup %s "
L"(error %d)",
curFileName, GetLastError());
return false;
}
file.previousFile = oldFileRenamedPath;
int error_code;
bool installed_ok;
if (file.patchable) {
error_code = ApplyPatch(file.tempPath.c_str(),
file.outputPath.c_str());
installed_ok = (error_code == 0);
if (installed_ok) {
BYTE patchedFileHash[BLAKE2_HASH_LENGTH];
if (!CalculateFileHash(file.outputPath.c_str(),
patchedFileHash)) {
Status(L"Update failed: Couldn't "
L"verify integrity of patched %s",
curFileName);
file.state = STATE_INSTALL_FAILED;
return false;
}
if (memcmp(file.hash, patchedFileHash,
BLAKE2_HASH_LENGTH) != 0) {
Status(L"Update failed: Integrity "
L"check of patched "
L"%s failed",
curFileName);
file.state = STATE_INSTALL_FAILED;
return false;
}
}
} else {
installed_ok = MyCopyFile(file.tempPath.c_str(),
file.outputPath.c_str());
error_code = GetLastError();
}
if (!installed_ok) {
int is_sharing_violation =
(error_code == ERROR_SHARING_VIOLATION);
if (is_sharing_violation)
Status(L"Update failed: %s is still in use. "
L"Close all "
L"programs and try again.",
curFileName);
else
Status(L"Update failed: Couldn't update %s "
L"(error %d)",
curFileName, GetLastError());
file.state = STATE_INSTALL_FAILED;
return false;
}
file.state = STATE_INSTALLED;
} else {
if (file.patchable) {
/* Uh oh, we thought we could patch something but it's
* no longer there! */
Status(L"Update failed: Source file %s not found",
file.outputPath.c_str());
return false;
}
/* We may be installing into new folders,
* make sure they exist */
CreateFoldersForPath(file.outputPath.c_str());
file.previousFile = L"";
bool success = !!MyCopyFile(file.tempPath.c_str(),
file.outputPath.c_str());
if (!success) {
Status(L"Update failed: Couldn't install %s (error %d)",
file.outputPath.c_str(), GetLastError());
file.state = STATE_INSTALL_FAILED;
return false;
}
file.state = STATE_INSTALLED;
}
return true;
}
static wchar_t tempPath[MAX_PATH] = {};
#define PATCH_MANIFEST_URL \
L"https://obsproject.com/update_studio/getpatchmanifest"
#define HASH_NULL L"0000000000000000000000000000000000000000"
static bool UpdateVS2017Redists(json_t *root)
{
/* ------------------------------------------ *
* Initialize session */
const DWORD tlsProtocols = WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_2;
HttpHandle hSession = WinHttpOpen(L"OBS Studio Updater/2.1",
WINHTTP_ACCESS_TYPE_DEFAULT_PROXY,
WINHTTP_NO_PROXY_NAME,
WINHTTP_NO_PROXY_BYPASS, 0);
if (!hSession) {
Status(L"Update failed: Couldn't open obsproject.com");
return false;
}
WinHttpSetOption(hSession, WINHTTP_OPTION_SECURE_PROTOCOLS,
(LPVOID)&tlsProtocols, sizeof(tlsProtocols));
HttpHandle hConnect = WinHttpConnect(hSession,
L"cdn-fastly.obsproject.com",
INTERNET_DEFAULT_HTTPS_PORT, 0);
if (!hConnect) {
Status(L"Update failed: Couldn't connect to cdn-fastly.obsproject.com");
return false;
}
int responseCode;
DWORD waitResult = WaitForSingleObject(cancelRequested, 0);
if (waitResult == WAIT_OBJECT_0) {
return false;
}
/* ------------------------------------------ *
* Download redist */
Status(L"Downloading %s", L"Visual C++ 2017 Redistributable");
const wchar_t *file = (is32bit) ? L"vc2017redist_x86.exe"
: L"vc2017redist_x64.exe";
wstring sourceURL;
sourceURL += L"https://cdn-fastly.obsproject.com/downloads/";
sourceURL += file;
wstring destPath;
destPath += tempPath;
destPath += L"\\";
destPath += file;
if (!HTTPGetFile(hConnect, sourceURL.c_str(), destPath.c_str(),
L"Accept-Encoding: gzip", &responseCode)) {
DeleteFile(destPath.c_str());
Status(L"Update failed: Could not download "
L"%s (error code %d)",
L"Visual C++ 2017 Redistributable", responseCode);
return false;
}
/* ------------------------------------------ *
* Get expected hash */
json_t *redistJson = json_object_get(
root, is32bit ? "vc2017_redist_x86" : "vc2017_redist_x64");
if (!redistJson) {
Status(L"Update failed: Could not parse VC2017 redist json");
return false;
}
const char *expectedHashUTF8 = json_string_value(redistJson);
wchar_t expectedHashWide[BLAKE2_HASH_STR_LENGTH];
BYTE expectedHash[BLAKE2_HASH_LENGTH];
if (!UTF8ToWideBuf(expectedHashWide, expectedHashUTF8)) {
DeleteFile(destPath.c_str());
Status(L"Update failed: Couldn't convert Json for redist hash");
return false;
}
StringToHash(expectedHashWide, expectedHash);
wchar_t downloadHashWide[BLAKE2_HASH_STR_LENGTH];
BYTE downloadHash[BLAKE2_HASH_LENGTH];
/* ------------------------------------------ *
* Get download hash */
if (!CalculateFileHash(destPath.c_str(), downloadHash)) {
DeleteFile(destPath.c_str());
Status(L"Update failed: Couldn't verify integrity of %s",
L"Visual C++ 2017 Redistributable");
return false;
}
/* ------------------------------------------ *
* If hashes do not match, integrity failed */
HashToString(downloadHash, downloadHashWide);
if (wcscmp(expectedHashWide, downloadHashWide) != 0) {
DeleteFile(destPath.c_str());
Status(L"Update failed: Couldn't verify integrity of %s",
L"Visual C++ 2017 Redistributable");
return false;
}
/* ------------------------------------------ *
* If hashes match, install redist */
wchar_t commandline[MAX_PATH + MAX_PATH];
StringCbPrintf(commandline, sizeof(commandline),
L"%s /install /quiet /norestart", destPath.c_str());
PROCESS_INFORMATION pi = {};
STARTUPINFO si = {};
si.cb = sizeof(si);
bool success = !!CreateProcessW(destPath.c_str(), commandline, nullptr,
nullptr, false, CREATE_NO_WINDOW,
nullptr, nullptr, &si, &pi);
if (success) {
Status(L"Installing %s...", L"Visual C++ 2017 Redistributable");
CloseHandle(pi.hThread);
WaitForSingleObject(pi.hProcess, INFINITE);
CloseHandle(pi.hProcess);
} else {
Status(L"Update failed: Could not execute "
L"%s (error code %d)",
L"Visual C++ 2017 Redistributable", (int)GetLastError());
}
DeleteFile(destPath.c_str());
waitResult = WaitForSingleObject(cancelRequested, 0);
if (waitResult == WAIT_OBJECT_0) {
return false;
}
return success;
}
extern "C" void UpdateHookFiles(void);
static bool Update(wchar_t *cmdLine)
{
/* ------------------------------------- *
* Check to make sure OBS isn't running */
HANDLE hObsUpdateMutex =
OpenMutexW(SYNCHRONIZE, false, L"OBSStudioUpdateMutex");
if (hObsUpdateMutex) {
HANDLE hWait[2];
hWait[0] = hObsUpdateMutex;
hWait[1] = cancelRequested;
int i = WaitForMultipleObjects(2, hWait, false, INFINITE);
if (i == WAIT_OBJECT_0)
ReleaseMutex(hObsUpdateMutex);
CloseHandle(hObsUpdateMutex);
if (i == WAIT_OBJECT_0 + 1)
return false;
}
if (!WaitForOBS())
return false;
/* ------------------------------------- *
* Init crypt stuff */
CryptProvider hProvider;
if (!CryptAcquireContext(&hProvider, nullptr, MS_ENH_RSA_AES_PROV,
PROV_RSA_AES, CRYPT_VERIFYCONTEXT)) {
SetDlgItemTextW(hwndMain, IDC_STATUS,
L"Update failed: CryptAcquireContext failure");
return false;
}
::hProvider = hProvider;
/* ------------------------------------- */
SetDlgItemTextW(hwndMain, IDC_STATUS,
L"Searching for available updates...");
HWND hProgress = GetDlgItem(hwndMain, IDC_PROGRESS);
LONG_PTR style = GetWindowLongPtr(hProgress, GWL_STYLE);
SetWindowLongPtr(hProgress, GWL_STYLE, style | PBS_MARQUEE);
SendDlgItemMessage(hwndMain, IDC_PROGRESS, PBM_SETMARQUEE, 1, 0);
/* ------------------------------------- *
* Check if updating portable build */
bool bIsPortable = false;
if (cmdLine[0]) {
int argc;
LPWSTR *argv = CommandLineToArgvW(cmdLine, &argc);
if (argv) {
for (int i = 0; i < argc; i++) {
if (wcscmp(argv[i], L"Portable") == 0) {
bIsPortable = true;
}
}
LocalFree((HLOCAL)argv);
}
}
/* ------------------------------------- *
* Get config path */
wchar_t lpAppDataPath[MAX_PATH];
lpAppDataPath[0] = 0;
if (bIsPortable) {
GetCurrentDirectory(_countof(lpAppDataPath), lpAppDataPath);
StringCbCat(lpAppDataPath, sizeof(lpAppDataPath), L"\\config");
} else {
DWORD ret;
ret = GetEnvironmentVariable(L"OBS_USER_APPDATA_PATH",
lpAppDataPath,
_countof(lpAppDataPath));
if (ret >= _countof(lpAppDataPath)) {
Status(L"Update failed: Could not determine AppData "
L"location");
return false;
}
if (!ret) {
CoTaskMemPtr<wchar_t> pOut;
HRESULT hr = SHGetKnownFolderPath(
FOLDERID_RoamingAppData, KF_FLAG_DEFAULT,
nullptr, &pOut);
if (hr != S_OK) {
Status(L"Update failed: Could not determine AppData "
L"location");
return false;
}
StringCbCopy(lpAppDataPath, sizeof(lpAppDataPath),
pOut);
}
}
StringCbCat(lpAppDataPath, sizeof(lpAppDataPath), L"\\obs-studio");
/* ------------------------------------- *
* Get download path */
wchar_t manifestPath[MAX_PATH];
wchar_t tempDirName[MAX_PATH];
manifestPath[0] = 0;
tempDirName[0] = 0;
StringCbPrintf(manifestPath, sizeof(manifestPath),
L"%s\\updates\\manifest.json", lpAppDataPath);
if (!GetTempPathW(_countof(tempDirName), tempDirName)) {
Status(L"Update failed: Failed to get temp path: %ld",
GetLastError());
return false;
}
if (!GetTempFileNameW(tempDirName, L"obs-studio", 0, tempPath)) {
Status(L"Update failed: Failed to create temp dir name: %ld",
GetLastError());
return false;
}
DeleteFile(tempPath);
CreateDirectory(tempPath, nullptr);
/* ------------------------------------- *
* Load manifest file */
Json root;
{
string manifestFile = QuickReadFile(manifestPath);
if (manifestFile.empty()) {
Status(L"Update failed: Couldn't load manifest file");
return false;
}
json_error_t error;
root = json_loads(manifestFile.c_str(), 0, &error);
if (!root) {
Status(L"Update failed: Couldn't parse update "
L"manifest: %S",
error.text);
return false;
}
}
if (!json_is_object(root.get())) {
Status(L"Update failed: Invalid update manifest");
return false;
}
/* ------------------------------------- *
* Parse current manifest update files */
json_t *packages = json_object_get(root, "packages");
size_t packageCount = json_array_size(packages);
for (size_t i = 0; i < packageCount; i++) {
if (!AddPackageUpdateFiles(packages, i, tempPath)) {
Status(L"Update failed: Failed to process update packages");
return false;
}
}
SendDlgItemMessage(hwndMain, IDC_PROGRESS, PBM_SETMARQUEE, 0, 0);
SetWindowLongPtr(hProgress, GWL_STYLE, style);
/* ------------------------------------- *
* Exit if updates already installed */
if (!updates.size()) {
Status(L"All available updates are already installed.");
SetDlgItemText(hwndMain, IDC_BUTTON, L"Launch OBS");
return true;
}
/* ------------------------------------- *
* Check for VS2017 redistributables */
if (!HasVS2017Redist()) {
if (!UpdateVS2017Redists(root)) {
return false;
}
}
/* ------------------------------------- *
* Generate file hash json */
Json files(json_array());
for (update_t &update : updates) {
wchar_t whash_string[BLAKE2_HASH_STR_LENGTH];
char hash_string[BLAKE2_HASH_STR_LENGTH];
char outputPath[MAX_PATH];
if (!update.has_hash)
continue;
/* check hash */
HashToString(update.my_hash, whash_string);
if (wcscmp(whash_string, HASH_NULL) == 0)
continue;
if (!WideToUTF8Buf(hash_string, whash_string))
continue;
if (!WideToUTF8Buf(outputPath, update.basename.c_str()))
continue;
string package_path;
package_path = update.packageName;
package_path += "/";
package_path += outputPath;
json_t *obj = json_object();
json_object_set(obj, "name", json_string(package_path.c_str()));
json_object_set(obj, "hash", json_string(hash_string));
json_array_append_new(files, obj);
}
/* ------------------------------------- *
* Send file hashes */
string newManifest;
if (json_array_size(files) > 0) {
char *post_body = json_dumps(files, JSON_COMPACT);
int responseCode;
int len = (int)strlen(post_body);
uLong compressSize = compressBound(len);
string compressedJson;
compressedJson.resize(compressSize);
compress2((Bytef *)&compressedJson[0], &compressSize,
(const Bytef *)post_body, len, Z_BEST_COMPRESSION);
compressedJson.resize(compressSize);
bool success = !!HTTPPostData(PATCH_MANIFEST_URL,
(BYTE *)&compressedJson[0],
(int)compressedJson.size(),
L"Accept-Encoding: gzip",
&responseCode, newManifest);
free(post_body);
if (!success)
return false;
if (responseCode != 200) {
Status(L"Update failed: HTTP/%d while trying to "
L"download patch manifest",
responseCode);
return false;
}
} else {
newManifest = "[]";
}
/* ------------------------------------- *
* Parse new manifest */
json_error_t error;
root = json_loads(newManifest.c_str(), 0, &error);
if (!root) {
Status(L"Update failed: Couldn't parse patch manifest: %S",
error.text);
return false;
}
if (!json_is_array(root.get())) {
Status(L"Update failed: Invalid patch manifest");
return false;
}
packageCount = json_array_size(root);
for (size_t i = 0; i < packageCount; i++) {
json_t *patch = json_array_get(root, i);
if (!json_is_object(patch)) {
Status(L"Update failed: Invalid patch manifest");
return false;
}
json_t *name_json = json_object_get(patch, "name");
json_t *hash_json = json_object_get(patch, "hash");
json_t *source_json = json_object_get(patch, "source");
json_t *size_json = json_object_get(patch, "size");
if (!json_is_string(name_json))
continue;
if (!json_is_string(hash_json))
continue;
if (!json_is_string(source_json))
continue;
if (!json_is_integer(size_json))
continue;
const char *name = json_string_value(name_json);
const char *hash = json_string_value(hash_json);
const char *source = json_string_value(source_json);
int size = (int)json_integer_value(size_json);
UpdateWithPatchIfAvailable(name, hash, source, size);
}
/* ------------------------------------- *
* Download Updates */
if (!RunDownloadWorkers(2))
return false;
if ((size_t)completedUpdates != updates.size()) {
Status(L"Update failed to download all files.");
return false;
}
/* ------------------------------------- *
* Install updates */
int updatesInstalled = 0;
int lastPosition = 0;
SendDlgItemMessage(hwndMain, IDC_PROGRESS, PBM_SETPOS, 0, 0);
for (update_t &update : updates) {
if (!UpdateFile(update)) {
return false;
} else {
updatesInstalled++;
int position = (int)(((float)updatesInstalled /
(float)completedUpdates) *
100.0f);
if (position > lastPosition) {
lastPosition = position;
SendDlgItemMessage(hwndMain, IDC_PROGRESS,
PBM_SETPOS, position, 0);
}
}
}
/* ------------------------------------- *
* Install virtual camera */
auto runcommand = [](wchar_t *cmd) {
STARTUPINFO si = {};
si.cb = sizeof(si);
si.dwFlags = STARTF_USESHOWWINDOW;
si.wShowWindow = SW_HIDE;
PROCESS_INFORMATION pi;
bool success = !!CreateProcessW(nullptr, cmd, nullptr, nullptr,
false, CREATE_NEW_CONSOLE,
nullptr, nullptr, &si, &pi);
if (success) {
WaitForSingleObject(pi.hProcess, INFINITE);
CloseHandle(pi.hThread);
CloseHandle(pi.hProcess);
}
};
if (!bIsPortable) {
wchar_t regsvr[MAX_PATH];
wchar_t src[MAX_PATH];
wchar_t tmp[MAX_PATH];
wchar_t tmp2[MAX_PATH];
SHGetFolderPathW(nullptr, CSIDL_SYSTEM, nullptr,
SHGFP_TYPE_CURRENT, regsvr);
StringCbCat(regsvr, sizeof(regsvr), L"\\regsvr32.exe");
GetCurrentDirectoryW(_countof(src), src);
StringCbCat(src, sizeof(src),
L"\\data\\obs-plugins\\win-dshow\\");
StringCbCopy(tmp, sizeof(tmp), L"\"");
StringCbCat(tmp, sizeof(tmp), regsvr);
StringCbCat(tmp, sizeof(tmp), L"\" /s \"");
StringCbCat(tmp, sizeof(tmp), src);
StringCbCat(tmp, sizeof(tmp), L"obs-virtualcam-module");
StringCbCopy(tmp2, sizeof(tmp2), tmp);
StringCbCat(tmp2, sizeof(tmp2), L"32.dll\"");
runcommand(tmp2);
if (is_64bit_windows()) {
StringCbCopy(tmp2, sizeof(tmp2), tmp);
StringCbCat(tmp2, sizeof(tmp2), L"64.dll\"");
runcommand(tmp2);
}
}
/* ------------------------------------- *
* Update hook files and vulkan registry */
UpdateHookFiles();
/* ------------------------------------- *
* Finish */
/* If we get here, all updates installed successfully so we can purge
* the old versions */
for (update_t &update : updates) {
if (!update.previousFile.empty())
DeleteFile(update.previousFile.c_str());
/* We delete here not above in case of duplicate hashes */
if (!update.tempPath.empty())
DeleteFile(update.tempPath.c_str());
}
SendDlgItemMessage(hwndMain, IDC_PROGRESS, PBM_SETPOS, 100, 0);
Status(L"Update complete.");
SetDlgItemText(hwndMain, IDC_BUTTON, L"Launch OBS");
return true;
}
static DWORD WINAPI UpdateThread(void *arg)
{
wchar_t *cmdLine = (wchar_t *)arg;
bool success = Update(cmdLine);
if (!success) {
/* This handles deleting temp files and rolling back and
* partially installed updates */
CleanupPartialUpdates();
if (tempPath[0])
RemoveDirectory(tempPath);
if (WaitForSingleObject(cancelRequested, 0) == WAIT_OBJECT_0)
Status(L"Update aborted.");
HWND hProgress = GetDlgItem(hwndMain, IDC_PROGRESS);
LONG_PTR style = GetWindowLongPtr(hProgress, GWL_STYLE);
SetWindowLongPtr(hProgress, GWL_STYLE, style & ~PBS_MARQUEE);
SendMessage(hProgress, PBM_SETSTATE, PBST_ERROR, 0);
SetDlgItemText(hwndMain, IDC_BUTTON, L"Exit");
EnableWindow(GetDlgItem(hwndMain, IDC_BUTTON), true);
updateFailed = true;
} else {
if (tempPath[0])
RemoveDirectory(tempPath);
}
if (bExiting)
ExitProcess(success);
return 0;
}
static void CancelUpdate(bool quit)
{
if (WaitForSingleObject(updateThread, 0) != WAIT_OBJECT_0) {
bExiting = quit;
SetEvent(cancelRequested);
} else {
PostQuitMessage(0);
}
}
static void LaunchOBS()
{
wchar_t cwd[MAX_PATH];
wchar_t newCwd[MAX_PATH];
wchar_t obsPath[MAX_PATH];
GetCurrentDirectory(_countof(cwd) - 1, cwd);
StringCbCopy(obsPath, sizeof(obsPath), cwd);
StringCbCat(obsPath, sizeof(obsPath),
is32bit ? L"\\bin\\32bit" : L"\\bin\\64bit");
SetCurrentDirectory(obsPath);
StringCbCopy(newCwd, sizeof(newCwd), obsPath);
StringCbCat(obsPath, sizeof(obsPath),
is32bit ? L"\\obs32.exe" : L"\\obs64.exe");
if (!FileExists(obsPath)) {
StringCbCopy(obsPath, sizeof(obsPath), cwd);
StringCbCat(obsPath, sizeof(obsPath), L"\\bin\\32bit");
SetCurrentDirectory(obsPath);
StringCbCopy(newCwd, sizeof(newCwd), obsPath);
StringCbCat(obsPath, sizeof(obsPath), L"\\obs32.exe");
if (!FileExists(obsPath)) {
/* TODO: give user a message maybe? */
return;
}
}
SHELLEXECUTEINFO execInfo;
ZeroMemory(&execInfo, sizeof(execInfo));
execInfo.cbSize = sizeof(execInfo);
execInfo.lpFile = obsPath;
execInfo.lpDirectory = newCwd;
execInfo.nShow = SW_SHOWNORMAL;
ShellExecuteEx(&execInfo);
}
static INT_PTR CALLBACK UpdateDialogProc(HWND hwnd, UINT message, WPARAM wParam,
LPARAM lParam)
{
switch (message) {
case WM_INITDIALOG: {
static HICON hMainIcon =
LoadIcon(hinstMain, MAKEINTRESOURCE(IDI_ICON1));
SendMessage(hwnd, WM_SETICON, ICON_BIG, (LPARAM)hMainIcon);
SendMessage(hwnd, WM_SETICON, ICON_SMALL, (LPARAM)hMainIcon);
return true;
}
case WM_COMMAND:
if (LOWORD(wParam) == IDC_BUTTON) {
if (HIWORD(wParam) == BN_CLICKED) {
DWORD result =
WaitForSingleObject(updateThread, 0);
if (result == WAIT_OBJECT_0) {
if (updateFailed)
PostQuitMessage(0);
else
PostQuitMessage(1);
} else {
EnableWindow((HWND)lParam, false);
CancelUpdate(false);
}
}
}
return true;
case WM_CLOSE:
CancelUpdate(true);
return true;
}
return false;
}
static int RestartAsAdmin(LPCWSTR lpCmdLine, LPCWSTR cwd)
{
wchar_t myPath[MAX_PATH];
if (!GetModuleFileNameW(nullptr, myPath, _countof(myPath) - 1)) {
return 0;
}
SHELLEXECUTEINFO shExInfo = {0};
shExInfo.cbSize = sizeof(shExInfo);
shExInfo.fMask = SEE_MASK_NOCLOSEPROCESS;
shExInfo.hwnd = 0;
shExInfo.lpVerb = L"runas"; /* Operation to perform */
shExInfo.lpFile = myPath; /* Application to start */
shExInfo.lpParameters = lpCmdLine; /* Additional parameters */
shExInfo.lpDirectory = cwd;
shExInfo.nShow = SW_NORMAL;
shExInfo.hInstApp = 0;
/* annoyingly the actual elevated updater will disappear behind other
* windows :( */
AllowSetForegroundWindow(ASFW_ANY);
/* if the admin is a different user, save the path to the user's
* appdata so we can load the correct manifest */
CoTaskMemPtr<wchar_t> pOut;
HRESULT hr = SHGetKnownFolderPath(FOLDERID_RoamingAppData,
KF_FLAG_DEFAULT, nullptr, &pOut);
if (hr == S_OK)
SetEnvironmentVariable(L"OBS_USER_APPDATA_PATH", pOut);
if (ShellExecuteEx(&shExInfo)) {
DWORD exitCode;
WaitForSingleObject(shExInfo.hProcess, INFINITE);
if (GetExitCodeProcess(shExInfo.hProcess, &exitCode)) {
if (exitCode == 1) {
return exitCode;
}
}
CloseHandle(shExInfo.hProcess);
}
return 0;
}
static bool HasElevation()
{
SID_IDENTIFIER_AUTHORITY sia = SECURITY_NT_AUTHORITY;
PSID sid = nullptr;
BOOL elevated = false;
BOOL success;
success = AllocateAndInitializeSid(&sia, 2, SECURITY_BUILTIN_DOMAIN_RID,
DOMAIN_ALIAS_RID_ADMINS, 0, 0, 0, 0,
0, 0, &sid);
if (success && sid) {
CheckTokenMembership(nullptr, sid, &elevated);
FreeSid(sid);
}
return elevated;
}
int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE, LPWSTR lpCmdLine, int)
{
INITCOMMONCONTROLSEX icce;
wchar_t cwd[MAX_PATH];
wchar_t newPath[MAX_PATH];
GetCurrentDirectoryW(_countof(cwd) - 1, cwd);
is32bit = wcsstr(cwd, L"bin\\32bit") != nullptr;
if (!HasElevation()) {
WinHandle hMutex = OpenMutex(
SYNCHRONIZE, false, L"OBSUpdaterRunningAsNonAdminUser");
if (hMutex) {
MessageBox(
nullptr, L"Updater Error",
L"OBS Studio Updater must be run as an administrator.",
MB_ICONWARNING);
return 2;
}
HANDLE hLowMutex = CreateMutexW(
nullptr, true, L"OBSUpdaterRunningAsNonAdminUser");
/* return code 1 = user wanted to launch OBS */
if (RestartAsAdmin(lpCmdLine, cwd) == 1) {
StringCbCat(cwd, sizeof(cwd), L"\\..\\..");
GetFullPathName(cwd, _countof(newPath), newPath,
nullptr);
SetCurrentDirectory(newPath);
LaunchOBS();
}
if (hLowMutex) {
ReleaseMutex(hLowMutex);
CloseHandle(hLowMutex);
}
return 0;
} else {
StringCbCat(cwd, sizeof(cwd), L"\\..\\..");
GetFullPathName(cwd, _countof(newPath), newPath, nullptr);
SetCurrentDirectory(newPath);
hinstMain = hInstance;
icce.dwSize = sizeof(icce);
icce.dwICC = ICC_PROGRESS_CLASS;
InitCommonControlsEx(&icce);
hwndMain = CreateDialog(hInstance,
MAKEINTRESOURCE(IDD_UPDATEDIALOG),
nullptr, UpdateDialogProc);
if (!hwndMain) {
return -1;
}
ShowWindow(hwndMain, SW_SHOWNORMAL);
SetForegroundWindow(hwndMain);
cancelRequested = CreateEvent(nullptr, true, false, nullptr);
updateThread = CreateThread(nullptr, 0, UpdateThread, lpCmdLine,
0, nullptr);
MSG msg;
while (GetMessage(&msg, nullptr, 0, 0)) {
if (!IsDialogMessage(hwndMain, &msg)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
/* there is no non-elevated process waiting for us if UAC is
* disabled */
WinHandle hMutex = OpenMutex(
SYNCHRONIZE, false, L"OBSUpdaterRunningAsNonAdminUser");
if (msg.wParam == 1 && !hMutex) {
LaunchOBS();
}
return (int)msg.wParam;
}
}
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