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// Copyright Epic Games, Inc. All Rights Reserved.
#include "zenserverprocess.h"
#include <zencore/filesystem.h>
#include <zencore/fmtutils.h>
#include <zencore/string.h>
#include <shellapi.h>
#include <spdlog/spdlog.h>
//////////////////////////////////////////////////////////////////////////
std::atomic<int> TestCounter{0};
ZenServerEnvironment::ZenServerEnvironment()
{
}
ZenServerEnvironment::~ZenServerEnvironment()
{
}
void
ZenServerEnvironment::Initialize(std::filesystem::path ProgramBaseDir)
{
m_ProgramBaseDir = ProgramBaseDir;
spdlog::debug("Program base dir is '{}'", ProgramBaseDir);
m_IsInitialized = true;
}
void
ZenServerEnvironment::InitializeForTest(std::filesystem::path ProgramBaseDir, std::filesystem::path TestBaseDir)
{
m_ProgramBaseDir = ProgramBaseDir;
m_TestBaseDir = TestBaseDir;
spdlog::info("Program base dir is '{}'", ProgramBaseDir);
spdlog::info("Cleaning test base dir '{}'", TestBaseDir);
zen::DeleteDirectories(TestBaseDir.c_str());
m_IsTestInstance = true;
m_IsInitialized = true;
}
std::filesystem::path
ZenServerEnvironment::CreateNewTestDir()
{
using namespace std::literals;
zen::ExtendableWideStringBuilder<256> TestDir;
TestDir << "test"sv << int64_t(++TestCounter);
std::filesystem::path TestPath = m_TestBaseDir / TestDir.c_str();
spdlog::info("Creating new test dir @ '{}'", TestPath);
zen::CreateDirectories(TestPath.c_str());
return TestPath;
}
std::filesystem::path
ZenServerEnvironment::GetTestRootDir(std::string_view Path)
{
std::filesystem::path Root = m_ProgramBaseDir.parent_path().parent_path();
std::filesystem::path Relative{Path};
return Root / Relative;
}
//////////////////////////////////////////////////////////////////////////
std::atomic<int> ChildIdCounter{0};
ZenServerInstance::ZenServerInstance(ZenServerEnvironment& TestEnvironment) : m_Env(TestEnvironment)
{
ZEN_ASSERT(TestEnvironment.IsInitialized());
}
ZenServerInstance::~ZenServerInstance()
{
if (m_Process.IsValid())
{
if (m_Terminate)
{
spdlog::info("Terminating zenserver process");
m_Process.Terminate(111);
}
else
{
SignalShutdown();
m_Process.Wait();
}
}
}
void
ZenServerInstance::SpawnServer(int BasePort)
{
ZEN_ASSERT(!m_Process.IsValid()); // Only spawn once
const std::filesystem::path BaseDir = m_Env.ProgramBaseDir();
const std::filesystem::path Executable = BaseDir / "zenserver.exe";
const int MyPid = _getpid();
const int ChildId = ++ChildIdCounter;
zen::ExtendableStringBuilder<32> ChildEventName;
ChildEventName << "Zen_Child_" << ChildId;
zen::NamedEvent ChildEvent{ChildEventName};
zen::ExtendableStringBuilder<32> ChildShutdownEventName;
ChildShutdownEventName << "Zen_Child_" << ChildId;
ChildShutdownEventName << "_Shutdown";
zen::NamedEvent ChildShutdownEvent{ChildShutdownEventName};
zen::ExtendableStringBuilder<32> LogId;
LogId << "Zen" << ChildId;
zen::ExtendableWideStringBuilder<128> CommandLine;
CommandLine << "\"";
CommandLine.Append(Executable.c_str());
CommandLine << "\"";
const bool IsTest = m_Env.IsTestEnvironment();
if (IsTest)
{
CommandLine << " --test --owner-pid " << MyPid << " --log-id " << LogId;
}
CommandLine << " --child-id " << ChildEventName;
if (BasePort)
{
CommandLine << " --port " << BasePort;
}
if (!m_TestDir.empty())
{
CommandLine << " --data-dir ";
CommandLine << m_TestDir.c_str();
}
if (m_MeshEnabled)
{
CommandLine << " --mesh";
}
std::filesystem::path CurrentDirectory = std::filesystem::current_path();
spdlog::debug("Spawning server");
PROCESS_INFORMATION ProcessInfo{};
STARTUPINFO StartupInfo{.cb = sizeof(STARTUPINFO)};
DWORD CreationFlags = 0;
if (!IsTest)
{
CreationFlags |= CREATE_NEW_CONSOLE;
}
HANDLE hProcess = NULL;
{
const bool InheritHandles = false;
void* Environment = nullptr;
LPSECURITY_ATTRIBUTES ProcessAttributes = nullptr;
LPSECURITY_ATTRIBUTES ThreadAttributes = nullptr;
BOOL Success = CreateProcessW(Executable.c_str(),
(LPWSTR)CommandLine.c_str(),
ProcessAttributes,
ThreadAttributes,
InheritHandles,
CreationFlags,
Environment,
CurrentDirectory.c_str(),
&StartupInfo,
&ProcessInfo);
if (Success)
{
hProcess = ProcessInfo.hProcess;
CloseHandle(ProcessInfo.hThread);
}
else
{
DWORD WinError = ::GetLastError();
if (WinError == ERROR_ELEVATION_REQUIRED)
{
// Try launching elevated process
spdlog::debug("Regular spawn failed - spawning elevated server");
SHELLEXECUTEINFO ShellExecuteInfo;
ZeroMemory(&ShellExecuteInfo, sizeof(ShellExecuteInfo));
ShellExecuteInfo.cbSize = sizeof(ShellExecuteInfo);
ShellExecuteInfo.fMask = SEE_MASK_UNICODE | SEE_MASK_NOCLOSEPROCESS;
ShellExecuteInfo.lpFile = Executable.c_str();
ShellExecuteInfo.lpVerb = TEXT("runas");
ShellExecuteInfo.nShow = SW_SHOW;
ShellExecuteInfo.lpParameters = CommandLine.c_str();
if (::ShellExecuteEx(&ShellExecuteInfo))
{
WinError = NO_ERROR;
hProcess = ShellExecuteInfo.hProcess;
}
}
if (WinError != NO_ERROR)
{
std::error_code err(WinError, std::system_category());
spdlog::error("Server spawn failed: {}", err.message());
throw std::system_error(err, "failed to create server process");
}
}
}
spdlog::debug("Server spawned OK");
if (IsTest)
{
m_Process.Initialize(hProcess);
m_ShutdownEvent = std::move(ChildShutdownEvent);
}
else
{
CloseHandle(hProcess);
}
m_ReadyEvent = std::move(ChildEvent);
}
void
ZenServerInstance::WaitUntilReady()
{
m_ReadyEvent.Wait();
}
bool
ZenServerInstance::WaitUntilReady(int Timeout)
{
return m_ReadyEvent.Wait(Timeout);
}
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