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118 lines
4.4 KiB
C++
118 lines
4.4 KiB
C++
/*
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* Copyright (C) by Michael Schuster <michael.schuster@nextcloud.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* Parts of this file are based on:
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* https://www.codeproject.com/articles/570751/devmsi-an-example-cplusplus-msi-wix-deferred-custo
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*
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* Licensed under the The Code Project Open License (CPOL):
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* https://www.codeproject.com/info/cpol10.aspx
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*
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*/
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#include "NCMsiHelper.h"
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/**
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* Sets up logging for MSIs and then calls the appropriate custom action with argc/argv parameters.
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*
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* MSI deferred custom action dlls have to handle parameters (properties) a little differently,
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* since the deferred action may not have an active session when it begins. Since the easiest
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* way to pass parameter(s) is to put them all into a CustomActionData property and then retrieve it,
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* the easiest thing to do on this ( C/C++ ) end is to pull the parameter and then split it into
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* a list of parameter(s) that we need.
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*
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* For this implementation, it made sense to treat the single string provided in CustomActionData
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* as if it were a command line, and then parse it out just as if it were a command line. Obviously,
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* the "program name" isn't going to be the first argument unless the MSI writer is pedantic, but
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* otherwise it seems to be a good way to do it.
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*
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* Since all entry points need to do this same work, it was easiest to have a single function that
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* would do the setup, pull the CustomActionData parameter, split it into an argc/argv style of
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* argument list, and then pass that argument list into a function that actually does something
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* interesting.
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*
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* @param hInstall The hInstall parameter provided by MSI/WiX.
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* @param func The function to be called with argc/argv parameters.
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* @param actionName The text description of the function. It will be put in the log.
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* @return Returns ERROR_SUCCESS or ERROR_INSTALL_FAILURE.
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*/
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UINT CustomActionArgcArgv(MSIHANDLE hInstall, CUSTOM_ACTION_ARGC_ARGV func, LPCSTR actionName)
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{
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LPWSTR pszCustomActionData = nullptr, *argv = nullptr;
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HRESULT hr = WcaInitialize(hInstall, actionName);
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ExitOnFailure(hr, "Failed to initialize");
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WcaLog(LOGMSG_STANDARD, "Initialized.");
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// Retrieve our custom action property. This is one of
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// only three properties we can request on a Deferred
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// Custom Action. So, we assume the caller puts all
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// parameters in this one property.
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hr = WcaGetProperty(L"CustomActionData", &pszCustomActionData);
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ExitOnFailure(hr, "Failed to get Custom Action Data.");
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WcaLog(LOGMSG_STANDARD, "Custom Action Data = '%ls'.", pszCustomActionData);
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// Convert the string retrieved into a standard argc/arg layout
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// (ignoring the fact that the first parameter is whatever was
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// passed, not necessarily the application name/path).
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int argc = 0;
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argv = CommandLineToArgvW(pszCustomActionData, &argc);
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if (argv) {
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hr = HRESULT_FROM_WIN32(GetLastError());
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ExitOnFailure(hr, "Failed to convert Custom Action Data to argc/argv.");
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}
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hr = (func)(argc, argv);
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ExitOnFailure(hr, "Custom action failed");
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LExit:
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// Resource freeing here!
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ReleaseStr(pszCustomActionData);
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if (argv)
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LocalFree(argv);
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return WcaFinalize(SUCCEEDED(hr) ? ERROR_SUCCESS : ERROR_INSTALL_FAILURE);
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}
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UINT __stdcall ExecNsisUninstaller(MSIHANDLE hInstall)
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{
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return CustomActionArgcArgv(hInstall, DoExecNsisUninstaller, "ExecNsisUninstaller");
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}
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UINT __stdcall RemoveNavigationPaneEntries(MSIHANDLE hInstall)
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{
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return CustomActionArgcArgv(hInstall, DoRemoveNavigationPaneEntries, "RemoveNavigationPaneEntries");
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}
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/**
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* DllMain - Initialize and cleanup WiX custom action utils.
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*/
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extern "C" BOOL WINAPI DllMain(
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__in HINSTANCE hInst,
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__in ULONG ulReason,
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__in LPVOID
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)
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{
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switch(ulReason)
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{
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case DLL_PROCESS_ATTACH:
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WcaGlobalInitialize(hInst);
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break;
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case DLL_PROCESS_DETACH:
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WcaGlobalFinalize();
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break;
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}
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return TRUE;
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}
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