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#include "stdafx.h"
#include <msi.h>
#include <windows.h>
#include <nsis/pluginapi.h>
#include "../error.h"
#include <log/log.h>
#include <libcommon/string.h>
#include <libcommon/error.h>
namespace
{
std::wstring PopString()
{
//
// NSIS functions popstring() and popstringn() require that you definitely size the buffer
// before popping the string. Let's do it ourselves instead.
//
if (!g_stacktop || !*g_stacktop)
{
THROW_ERROR("NSIS variable stack is corrupted");
}
stack_t *th = *g_stacktop;
std::wstring copy(th->text);
*g_stacktop = th->next;
GlobalFree((HGLOBAL)th);
return copy;
}
EXTERN_C IMAGE_DOS_HEADER __ImageBase;
void PinDll()
{
//
// Apparently NSIS loads and unloads the plugin module for EVERY call it makes to the plugin.
// This makes it kind of difficult to maintain state.
//
// We can work around this by incrementing the module reference count.
// When NSIS calls FreeLibrary() the reference count decrements and becomes one.
//
wchar_t self[MAX_PATH];
if (0 == GetModuleFileNameW((HINSTANCE)&__ImageBase, self, _countof(self)))
{
THROW_ERROR("Failed to pin plugin module");
}
//
// For some reason, NSIS frees this particular DLL more times than it loads it
// so we have to up the reference count significantly.
//
for (int i = 0; i < 100; ++i)
{
LoadLibraryW(self);
}
}
int WINAPI InstallerHandler(
LPVOID context,
UINT type,
LPCWSTR message
)
{
// Do not log potentially sensitive information
if (0 == _wcsnicmp(message, L"Property", _countof(L"Property") - sizeof(L'\0')))
{
return 0;
}
PluginLog(message);
// return 0 to pass it on to the installer
return 0;
}
} // anonymous namespace
//
// SilentInstall "installer.msi"
//
// Performs a silent install and logs the results.
//
// Return: Empty string and NsisStatus::SUCCESS on success.
// Otherwise an error string and NsisStatus::GENERAL_ERROR.
//
void __declspec(dllexport) NSISCALL SilentInstall
(
HWND hwndParent,
int string_size,
LPTSTR variables,
stack_t **stacktop,
extra_parameters *extra,
...
)
{
EXDLL_INIT();
try
{
const auto msiFile = PopString();
MsiSetInternalUI(INSTALLUILEVEL_NONE, nullptr);
MsiSetExternalUIW(
InstallerHandler,
INSTALLLOGMODE_INFO |
INSTALLLOGMODE_WARNING |
INSTALLLOGMODE_ERROR |
INSTALLLOGMODE_FATALEXIT |
INSTALLLOGMODE_OUTOFDISKSPACE |
INSTALLLOGMODE_RMFILESINUSE |
INSTALLLOGMODE_FILESINUSE,
nullptr
);
const auto installResult = MsiInstallProductW(
msiFile.c_str(),
L"ACTION=INSTALL "
L"REBOOT=ReallySuppress"
);
if (ERROR_SUCCESS != installResult)
{
pushstring(common::string::ToWide(common::error::FormatWindowsError(installResult)).c_str());
pushint(NsisStatus::GENERAL_ERROR);
return;
}
pushstring(L"");
pushint(NsisStatus::SUCCESS);
}
catch (std::exception & err)
{
pushstring(common::string::ToWide(err.what()).c_str());
pushint(NsisStatus::GENERAL_ERROR);
}
catch (...)
{
pushstring(L"Unspecified error");
pushint(NsisStatus::GENERAL_ERROR);
}
}
//
// SilentUninstall "installer.msi"
//
// Performs a silent uninstall and logs the results.
//
// Return: Empty string and NsisStatus::SUCCESS on success.
// Otherwise an error string and NsisStatus::GENERAL_ERROR.
//
void __declspec(dllexport) NSISCALL SilentUninstall
(
HWND hwndParent,
int string_size,
LPTSTR variables,
stack_t **stacktop,
extra_parameters *extra,
...
)
{
EXDLL_INIT();
try
{
const auto msiFile = PopString();
MsiSetInternalUI(INSTALLUILEVEL_NONE, nullptr);
MsiSetExternalUIW(
InstallerHandler,
INSTALLLOGMODE_INFO |
INSTALLLOGMODE_WARNING |
INSTALLLOGMODE_ERROR |
INSTALLLOGMODE_FATALEXIT |
INSTALLLOGMODE_OUTOFDISKSPACE |
INSTALLLOGMODE_RMFILESINUSE |
INSTALLLOGMODE_FILESINUSE,
nullptr
);
const auto installResult = MsiInstallProductW(
msiFile.c_str(),
L"REMOVE=ALL "
L"REBOOT=ReallySuppress"
);
if (ERROR_SUCCESS != installResult)
{
pushstring(common::string::ToWide(common::error::FormatWindowsError(installResult)).c_str());
pushint(NsisStatus::GENERAL_ERROR);
return;
}
pushstring(L"");
pushint(NsisStatus::SUCCESS);
}
catch (std::exception & err)
{
pushstring(common::string::ToWide(err.what()).c_str());
pushint(NsisStatus::GENERAL_ERROR);
}
catch (...)
{
pushstring(L"Unspecified error");
pushint(NsisStatus::GENERAL_ERROR);
}
}
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