File indexing completed on 2024-05-05 05:45:56

 /*
     Copyright Hannah von Reth <vonreth@kde.org>
 
     Redistribution and use in source and binary forms, with or without
     modification, are permitted provided that the following conditions
     are met:
     1. Redistributions of source code must retain the above copyright
        notice, this list of conditions and the following disclaimer.
     2. Redistributions in binary form must reproduce the above copyright
        notice, this list of conditions and the following disclaimer in the
        documentation and/or other materials provided with the distribution.
 
     THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     SUCH DAMAGE.
 */
 
 #include "kshim.h"
 #include "kshimdata.h"
 
 #include <algorithm>
 #include <comdef.h>
 #include <windows.h>
 
 using namespace std;
 
 namespace {
 auto formatCommand(const KShimData &data, const std::vector<KShimLib::string_view> &arguments)
 {
     auto app = data.appAbsWithOverride();
     if (data.isKeepArgv0Enabled()) {
         app = KShimLib::binaryName();
     }
     KShimLib::stringstream cmd;
     cmd << KShimLib::quote(app.native()) << data.formatArgs(arguments);
     return cmd.str();
 }
 }
 
 std::filesystem::path KShimLib::binaryName()
 {
     static const std::filesystem::path path = [] {
         std::wstring buf;
         size_t size;
         do {
             buf.resize(buf.size() + 1024);
             size = GetModuleFileNameW(nullptr, const_cast<wchar_t *>(buf.data()),
                                       static_cast<DWORD>(buf.size()));
         } while (GetLastError() == ERROR_INSUFFICIENT_BUFFER);
         buf.resize(size);
         return std::filesystem::path(buf);
     }();
     return path;
 }
 
 bool KShimLib::exists(const std::filesystem::path &path)
 {
     DWORD dwAttrib = GetFileAttributesW(path.wstring().data());
 
     return (dwAttrib != INVALID_FILE_ATTRIBUTES && !(dwAttrib & FILE_ATTRIBUTE_DIRECTORY));
 }
 
 std::filesystem::path KShimLib::findInPath(const std::filesystem::path &path)
 {
     auto find = [](const std::wstring &dir, const std::filesystem::path &name) {
         const std::wstring ext = name.extension().empty() ? L".exe" : std::wstring(name.extension());
         std::wstring buf;
         size_t size;
         wchar_t *filePart;
         size = SearchPathW(dir.data(), name.wstring().data(), ext.data(), 0, nullptr, &filePart);
         if (size == 0) {
             return std::filesystem::path();
         }
         buf.resize(size);
         size = SearchPathW(dir.data(), name.wstring().data(), ext.data(),
                            static_cast<DWORD>(buf.size()), buf.data(), &filePart);
         if (size > buf.size()) {
             kLog2(KLog::Type::Fatal) << "SearchPathW failed to find " << name
                                      << " error: " << _com_error(GetLastError()).ErrorMessage()
                                      << buf.size() << " " << size;
         }
         buf.resize(size);
         return std::filesystem::path(buf);
     };
     auto path_env = std::wstringstream(KShimLib::getenv(L"PATH"));
     std::wstring dir;
     while (std::getline(path_env, dir, L';')) {
         auto tmp = find(dir, path);
         if (!tmp.empty() && tmp != KShimLib::binaryName()) {
             kLog << "Found: " << tmp << " for " << path;
             return tmp;
         }
     }
     kLog2(KLog::Type::Fatal) << "Failed to locate" << path;
     return {};
 }
 
 int KShimLib::run(const KShimData &data, const std::vector<KShimLib::string_view> &args)
 {
     for (auto var : data.env()) {
         kLog << "SetEnvironmentVariable: " << var.first << "=" << var.second;
         SetEnvironmentVariableW(var.first.data(), var.second.empty() ? nullptr : var.second.data());
     }
     // TODO: pass environment
     STARTUPINFOW info = {};
     info.cb = sizeof(info);
     PROCESS_INFORMATION pInfo = {};
     const auto app = data.appAbsWithOverride();
     const auto arguments = formatCommand(data, args);
     kLog << app << " " << arguments;
     kLog << "CommandLength: " << arguments.size();
 
     if (!CreateProcessW(app.wstring().c_str(), const_cast<wchar_t *>(arguments.c_str()), nullptr,
                         nullptr, true, INHERIT_PARENT_AFFINITY | CREATE_UNICODE_ENVIRONMENT,
                         nullptr, nullptr, &info, &pInfo)) {
         const auto error = GetLastError();
         kLog2(KLog::Type::Error) << "Failed to start target" << _com_error(error).ErrorMessage();
         return static_cast<int>(error);
     }
     WaitForSingleObject(pInfo.hProcess, INFINITE);
     DWORD exitCode;
     GetExitCodeProcess(pInfo.hProcess, &exitCode);
 
     CloseHandle(pInfo.hProcess);
     CloseHandle(pInfo.hThread);
     return static_cast<int>(exitCode);
 }
 
 KShimLib::string KShimLib::getenv(const KShimLib::string_view &var,
                                   const KShimLib::string_view &fallback)
 {
     const auto size = GetEnvironmentVariableW(var.data(), nullptr, 0);
     if (!size) {
         return fallback.empty() ? L""s : fallback.data();
     }
     KShimLib::string out(size, 0);
     GetEnvironmentVariableW(var.data(), const_cast<wchar_t *>(out.data()), size);
     out.resize(size - 1);
     return out;
 }