mipt_2024_win_shell_server/service.c

#include "service.h"

extern SERVICE_STATUS gSvcStatus;
extern SERVICE_STATUS_HANDLE gSvcStatusHandle;
extern HANDLE ghSvcStopEvent;

VOID SvcInstall() {
    SC_HANDLE schSCManager;
    SC_HANDLE schService;
    TCHAR szUnquotedPath[MAX_PATH];

    if (!GetModuleFileName(NULL, szUnquotedPath, MAX_PATH)) {
        printf("Cannot install service (%d)\n", GetLastError());
        return;
    }

    TCHAR szPath[MAX_PATH];
    StringCbPrintf(szPath, MAX_PATH, TEXT("\"%s\" -sc"), szUnquotedPath);

    // Get a handle to the SCM database.
    schSCManager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);

    if (NULL == schSCManager) {
        printf("OpenSCManager failed (%d)\n", GetLastError());
        return;
    }

    printf("Installing %s as service...\n", szPath);

    schService = CreateService(schSCManager,       // SCM database
        SVCNAME,            // name of service
        SVCNAME,            // service name to display
        SERVICE_ALL_ACCESS, // desired access
        SERVICE_WIN32_OWN_PROCESS, // service type
        SERVICE_DEMAND_START,      // start type
        SERVICE_ERROR_NORMAL,      // error control type
        szPath, // path to service's binary
        NULL,   // no load ordering group
        NULL,   // no tag identifier
        NULL,   // no dependencies
        NULL,   // LocalSystem account
        NULL);  // no password

    if (schService == NULL) {
        printf("CreateService failed (%d)\n", GetLastError());
        CloseServiceHandle(schSCManager);
        return;
    }
    else
        printf("Service installed successfully\n");

    CloseServiceHandle(schService);
    CloseServiceHandle(schSCManager);
}

VOID ReportSvcStatus(DWORD dwCurrentState, DWORD dwWin32ExitCode,
    DWORD dwWaitHint) {
    static DWORD dwCheckPoint = 1;

    // Fill in the SERVICE_STATUS structure.
    gSvcStatus.dwCurrentState = dwCurrentState;
    gSvcStatus.dwWin32ExitCode = dwWin32ExitCode;
    gSvcStatus.dwWaitHint = dwWaitHint;

    if (dwCurrentState == SERVICE_START_PENDING)
        gSvcStatus.dwControlsAccepted = 0;
    else
        gSvcStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP;

    if ((dwCurrentState == SERVICE_RUNNING) ||
        (dwCurrentState == SERVICE_STOPPED))
        gSvcStatus.dwCheckPoint = 0;
    else
        gSvcStatus.dwCheckPoint = dwCheckPoint++;

    // Report the status of the service to the SCM.
    SetServiceStatus(gSvcStatusHandle, &gSvcStatus);
}

VOID WINAPI SvcCtrlHandler(DWORD dwCtrl) {
    // Handle the requested control code.
    switch (dwCtrl) {
    case SERVICE_CONTROL_STOP:
        ReportSvcStatus(SERVICE_STOP_PENDING, NO_ERROR, 0);

        // Signal the service to stop.
        SetEvent(ghSvcStopEvent);
        ReportSvcStatus(gSvcStatus.dwCurrentState, NO_ERROR, 0);

        return;

    case SERVICE_CONTROL_INTERROGATE:
        break;

    default:
        break;
    }
}

VOID SvcReportEvent(LPTSTR szFunction) {
    HANDLE hEventSource;
    LPCTSTR lpszStrings[2];
    TCHAR Buffer[80];

    hEventSource = RegisterEventSource(NULL, SVCNAME);

    if (NULL != hEventSource) {
        StringCchPrintf(Buffer, 80, TEXT("%s failed with %d"), szFunction,
            GetLastError());

        lpszStrings[0] = SVCNAME;
        lpszStrings[1] = Buffer;

        ReportEvent(hEventSource,        // event log handle
            EVENTLOG_ERROR_TYPE, // event type
            0,                   // event category
            SVC_ERROR,           // event identifier
            NULL,                // no security identifier
            2,                   // size of lpszStrings array
            0,                   // no binary data
            lpszStrings,         // array of strings
            NULL);               // no binary data

        DeregisterEventSource(hEventSource);
    }
}

VOID SvcRemove(void) {
    SC_HANDLE hSCManager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
    if (!hSCManager) {
        printf("Error: Can't open Service Control Manager\n");
        //  addLogMessage("Error: Can't open Service Control Manager");
        return;
    }

    SC_HANDLE hService = OpenService(hSCManager, SVCNAME, SERVICE_STOP | DELETE);
    if (!hService) {
        printf("Error: Can't remove service\n");
        //  addLogMessage("Error: Can't remove service");
        CloseServiceHandle(hSCManager);
        return;
    }

    DeleteService(hService);
    CloseServiceHandle(hService);
    CloseServiceHandle(hSCManager);
    // addLogMessage("Success remove service!");
    printf("Service deleted successfully\n");
}