windows bat

@echo off
:begin

set SERVER_RUN_FLAG=''


:start
    echo %SERVER_RUN_FLAG%
    if %SERVER_RUN_FLAG%=="true" (
      echo result is true
      del /s /q /f C:\Users\user\server_status.txt
      exit /b 0
    ) else (
        TIMEOUT /T 3
        cd  C:\Users\user
        sc.exe query LanmanServer >> server_status.txt

        set TARGET_STR="RUNNING"

        set temp=''
        setlocal enabledelayedexpansion
        for /f  "delims=" %%i  in  (server_status.txt)   do (
            set temp=%%i
            echo !temp! | findstr %TARGET_STR% >nul && (set SERVER_RUN_FLAG="true")
        )
        if %SERVER_RUN_FLAG%=="true" (
          echo result is true
        )
    )

goto start