QT开启服务

如何使用QT来开启一个服务呢？

新建一个QT工程，添加如下代码：

#include <windows.h>
#include <string>

/*******************************************
* 函数：StartServiceExistByName
* 参数：strDestServiceName
* 功能：判断服务状态并启动
* 返回值：
* TRUE  服务启动成功
* FALSE 服务启动失败
********************************************/
bool StartServiceByName(std::string strDestServiceName)
{
    bool bServiceStatus = FALSE;
    SC_HANDLE schSCManager  =  NULL ;
    SC_HANDLE schService    =  NULL ;
    SERVICE_STATUS_PROCESS ssStatus;
    DWORD dwBytesNeeded     =  0 ;
    char szSvcName[MAX_PATH] = {0};
    memcpy_s(szSvcName,MAX_PATH,strDestServiceName.c_str(),strDestServiceName.length());
    // Get a handle to the SCM database.
    schSCManager = OpenSCManager(
        NULL ,                                 // local computer
        NULL ,                                 // ServicesActive database
        SC_MANAGER_ALL_ACCESS);               // full access rights

    if  ( NULL  == schSCManager)
    {
        //LOG(level_error, "OpenSCManager failed (%d)" , GetLastError());
        return bServiceStatus;
    }

    // Get a handle to the service.
    schService = OpenServiceA(
        schSCManager,                       // SCM database
        szSvcName,                          // name of service
        SERVICE_ALL_ACCESS/* | DELETE*/);      // full access

    if  (schService ==  NULL )
    {
        //LOG(level_error, "OpenService failed (%d)" , GetLastError());
        CloseServiceHandle(schSCManager);
        return bServiceStatus;
    }
    if  (!QueryServiceStatusEx(
        schService,                          // handle to service
        SC_STATUS_PROCESS_INFO,              // information level
        (LPBYTE) &ssStatus,                  // address of structure
        sizeof (SERVICE_STATUS_PROCESS),      // size of structure
        &dwBytesNeeded ) )                   // size needed if buffer is too small
    {
        //LOG(level_error, "QueryServiceStatusEx failed (%d)" , GetLastError());
        CloseServiceHandle(schService);
        CloseServiceHandle(schSCManager);
        return bServiceStatus;
    }
    else
    {
        switch (ssStatus.dwCurrentState)
        {
        case  SERVICE_STOPPED:
        case  SERVICE_STOP_PENDING:
            //LOG(level_info, "%s Service status is Stop ", szSvcName);
            break ;
        case  SERVICE_PAUSED:
        case  SERVICE_PAUSE_PENDING:
            //LOG(level_info, "%s Service status is Pause ", szSvcName);
            break ;
        case  SERVICE_CONTINUE_PENDING:
        case  SERVICE_RUNNING:
        case  SERVICE_START_PENDING:
            //LOG(level_info, "%s Service status is Running ", szSvcName);
            bServiceStatus = TRUE;
            break ;
        }
    }
    if (bServiceStatus == FALSE)
    {
        StartService(schService,0,NULL);
        Sleep(500);
        //LOG(level_error, "StartService failed (%d)" , GetLastError());
        // 获得服务的当前状态
        QueryServiceStatusEx(schService,SC_STATUS_PROCESS_INFO,(LPBYTE) &ssStatus,sizeof (SERVICE_STATUS_PROCESS),&dwBytesNeeded );
        if (SERVICE_RUNNING == ssStatus.dwCurrentState)
        {
            bServiceStatus = TRUE;
        }
    }
    CloseServiceHandle(schService);
    CloseServiceHandle(schSCManager);
    return bServiceStatus;
}

调用起来很简单：

StartServiceByName("XXX");

其中 XXX 是服务名，应该取下图任务管理器中红框那一列的名字

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