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Updater compatibility with Windows XP

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With some LoadLibrary/GetProcAddress shenanigans
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tux3 2016-01-15 17:38:40 +01:00
parent 05162a63b9
commit 3645e39b89
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GPG Key ID: 7E086DD661263264
1 changed files with 36 additions and 5 deletions
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41
updater/widget.cpp
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@ -154,14 +154,29 @@ void Widget::startQToxAndExit()
SecureZeroMemory(&pi, sizeof(pi));
si.cb = sizeof(si);
if (!CreateProcessWithTokenW(hPrimaryToken, 0, QTOX_PATH.toStdWString().c_str(), 0, 0, 0, 0, &si, &pi))
bool unelevateOk = true;
auto advapi32H = LoadLibrary(TEXT("advapi32.dll"));
if ((unelevateOk = (advapi32H != nullptr)))
{
auto CreateProcessWithTokenWH = (decltype(&CreateProcessWithTokenW))
GetProcAddress(advapi32H, "CreateProcessWithTokenW");
if ((unelevateOk = (CreateProcessWithTokenWH != nullptr)))
{
if (!CreateProcessWithTokenWH(hPrimaryToken, 0, QTOX_PATH.toStdWString().c_str(), 0, 0, 0, 0, &si, &pi))
unelevateOk = false;
}
}
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
if (!unelevateOk)
{
qWarning() << "Failed to start unelevated qTox";
QProcess::startDetached(QTOX_PATH);
}
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
#else
QProcess::startDetached(QTOX_PATH);
#endif
@ -187,8 +202,24 @@ QString Widget::getSettingsDirPath()
#ifdef Q_OS_WIN
wchar_t* path;
SHGetKnownFolderPath(FOLDERID_RoamingAppData, 0, hPrimaryToken, &path);
QString pathStr = QString::fromStdWString(path);
wchar_t pathOld[MAX_PATH];
bool isOld = false; // If true, we have to use pathOld and older Windows API.
auto shell32H = LoadLibrary(TEXT("shell32.dll"));
if (!(isOld = (shell32H == nullptr)))
{
auto SHGetKnownFolderPathH = (decltype(&SHGetKnownFolderPath))
GetProcAddress(shell32H, "SHGetKnownFolderPath");
if (!(isOld = (SHGetKnownFolderPathH == nullptr)))
SHGetKnownFolderPathH(FOLDERID_RoamingAppData, 0, hPrimaryToken, &path);
}
if (isOld)
{
qDebug() << "Falling back to legacy APIs...";
SHGetFolderPathW(nullptr, CSIDL_APPDATA, nullptr, 0, pathOld);
}
QString pathStr = QString::fromStdWString(isOld ? pathOld : path);
pathStr.replace("\\", "/");
return pathStr + "/tox";
#else