[英]Windows service doesn't enter _tmain on startup
我正在基於以下頁面上的教程編寫服務: https : //www.codeproject.com/Articles/499465/Simple-Windows-Service-in-Cplusplus
我可以使用以下方法成功創建服務:
sc create service_name binPath=<path_name>
嘗試啟動服務時,出現以下錯誤:
sc start service_name
[SC] StartService FAILED 1053:
The service did not respond to the start or control request in a timely fashion.
這是我的main():
int main (int argc, char *argv[])
{
OutputDebugString("service_name: entered main");
SERVICE_TABLE_ENTRY ServiceTable[] =
{
{SERVICE_NAME, (LPSERVICE_MAIN_FUNCTION) ServiceMain},
{NULL, NULL}
};
if (StartServiceCtrlDispatcher (ServiceTable) == FALSE)
{
return GetLastError();
}
return 0;
}
編輯 :我從日志文件切換到OutputDebugString()/ DebugView
我運行了DebugView,但從未收到“ entered main”。 但是,如果我用return語句替換工作線程的內容,則確實可以成功啟動,並且會收到調試消息,因此我知道DebugView可以正常工作。
這是我創建工作線程的地方:
// Start a thread that will perform the main task of the service
HANDLE hThread = CreateThread (NULL, 0, ServiceWorkerThread, NULL, 0, NULL);
if (hThread) {
// Wait until our worker thread exits, so we can set state to SERVICE_STOPPED and return needs to stop
WaitForSingleObject (hThread, INFINITE);
} else {
OutputDebugString("service_name: ServiceMain: CreateThread returned NULL");
}
看來我的工作線程是造成啟動錯誤的原因,但是為什么我不能在main()的頂部獲得調試消息?
如果服務創建成功,則應該在Windows服務列表中(計算機管理->服務和應用程序->服務)看到它。 如果不存在,則未正確注冊。 如果存在,則可以嘗試從Windows服務控制台啟動它。 您的_tmain不會被服務調用,不會生成任何日志。
您需要使用SetServiceStatus函數更新SCM狀態。
如果初始化服務需要很長時間,則應定期以SERVICE_START_PENDING狀態更新狀態。
初始化完成后,必須將SCM狀態更新為SERVICE_RUNNING。
其他狀態是:
-SERVICE_STOP_PENDING。
-SERVICE_PAUSE_PENDING。
-SERVICE_CONTINUE_PENDING。
-SERVICE_STOPPED。
我將狀態發送到SCM的函數如下:
BOOL SendStatusToSCM
(
DWORD dwCurrentState,
DWORD dwWin32ExitCode,
DWORD dwServiceSpecificExitCode,
DWORD dwCheckPoint,
DWORD dwWaitHint
)
{
BOOL success;
SERVICE_STATUS serviceStatus;
// Preenche os campos do service status
serviceStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
serviceStatus.dwCurrentState = dwCurrentState;
if (dwCurrentState == SERVICE_START_PENDING)
serviceStatus.dwControlsAccepted = 0;
else
serviceStatus.dwControlsAccepted =
SERVICE_ACCEPT_STOP |
SERVICE_ACCEPT_PAUSE_CONTINUE |
SERVICE_ACCEPT_SHUTDOWN;
if (dwServiceSpecificExitCode == 0)
serviceStatus.dwWin32ExitCode =
dwWin32ExitCode;
else
serviceStatus.dwWin32ExitCode =
ERROR_SERVICE_SPECIFIC_ERROR;
serviceStatus.dwServiceSpecificExitCode =
dwServiceSpecificExitCode;
serviceStatus.dwCheckPoint = dwCheckPoint;
serviceStatus.dwWaitHint = dwWaitHint;
// Passa o status para o SCM
success = SetServiceStatus
(
serviceStatusHandle,
&serviceStatus
);
if (!success)
exit( 99 );
return success;
}
通過以下創建,啟動服務可以完美運行並始終激活main():
serv = CreateService(
sc,
noServ, // service name
noDisp, // display name
SERVICE_ALL_ACCESS, // desired access
SERVICE_WIN32_OWN_PROCESS, // service type
SERVICE_AUTO_START, // modo de iniciar o serviço
SERVICE_ERROR_NORMAL, // gravidade da falha do serviço
noExec, // nome do executável
NULL, // nome do grupo ao qual pertence
NULL, // tag id
NULL, // tabela de dependências
NULL, // account name
NULL // account password
);
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