【bat】バッチファイルでプロセスを監視して異常終了を検知する完全ガイド｜tasklist・監視ループ・複数プロセス・終了コード・自動復旧まで

@echo off
setlocal

set TARGET=myapp.exe
set LOGFILE=C:\logs\proc_monitor.log
if not exist "C:\logs" mkdir "C:\logs"

REM タイムスタンプ整形
set T=%TIME: =0%
set TS=%DATE% %T:~0,8%

REM /FI でフィルタリング: IMAGENAME が一致するプロセスのみ
tasklist /FI "IMAGENAME eq %TARGET%" 2>nul | findstr /i "%TARGET%" >nul
if %ERRORLEVEL% equ 0 (
    echo [%TS%] [OK] %TARGET% 動作中 >> "%LOGFILE%"
) else (
    echo [%TS%] [NG] %TARGET% が停止しています！ >> "%LOGFILE%"
)
endlocal

@echo off
setlocal enabledelayedexpansion

set TARGET=myapp.exe
set LOGFILE=C:\logs\proc_monitor.log
set INTERVAL=30
if not exist "C:\logs" mkdir "C:\logs"

call :log "===== 監視開始 対象: %TARGET% ====="

:MONITOR_LOOP
tasklist /FI "IMAGENAME eq %TARGET%" 2>nul | findstr /i "%TARGET%" >nul
if %ERRORLEVEL% equ 0 (
    call :log "[OK] %TARGET% 動作中"
) else (
    call :log "[NG] %TARGET% 停止検知！"
)
timeout /t %INTERVAL% /nobreak >nul
goto MONITOR_LOOP

:log
set T=%TIME: =0%
echo [%DATE% %T:~0,8%] %~1 >> "%LOGFILE%"
echo [%DATE% %T:~0,8%] %~1
goto :eof

@echo off
setlocal enabledelayedexpansion

set LOGFILE=C:\logs\multi_proc.log
set INTERVAL=60
if not exist "C:\logs" mkdir "C:\logs"

REM 監視対象プロセスをスペース区切りで列挙
set TARGETS=svchost.exe notepad.exe myapp.exe

:MULTI_LOOP
set T=%TIME: =0%
set TS=%DATE% %T:~0,8%
set NG_COUNT=0

echo ===== チェック: %TS% ===== >> "%LOGFILE%"

for %%P in (%TARGETS%) do (
    tasklist /FI "IMAGENAME eq %%P" 2>nul | findstr /i "%%P" >nul
    if !ERRORLEVEL! equ 0 (
        echo   [OK] %%P >> "%LOGFILE%"
    ) else (
        echo   [NG] %%P 停止！ >> "%LOGFILE%"
        set /a NG_COUNT+=1
    )
)

if %NG_COUNT% gtr 0 (
    echo 異常プロセス数: %NG_COUNT% 件 >> "%LOGFILE%"
)
echo. >> "%LOGFILE%"

timeout /t %INTERVAL% /nobreak >nul
goto MULTI_LOOP

@echo off
setlocal enabledelayedexpansion

set TARGET=myapp.exe
set LOGFILE=C:\logs\mem_monitor.log
REM メモリ上限（バイト）: 500 MB = 524288000
set MEM_LIMIT=524288000
if not exist "C:\logs" mkdir "C:\logs"

:MEM_LOOP
set T=%TIME: =0%
set TS=%DATE% %T:~0,8%

REM プロセスの存在確認
tasklist /FI "IMAGENAME eq %TARGET%" 2>nul | findstr /i "%TARGET%" >nul
if %ERRORLEVEL% neq 0 (
    echo [%TS%] [NG] %TARGET% 停止！ >> "%LOGFILE%"
    goto MEM_WAIT
)

REM WorkingSetSize（バイト）を取得
set MEM=0
for /f "skip=1 tokens=2 delims==" %%M in (
    'wmic process where "Name='%TARGET%'" get WorkingSetSize /value'
) do (
    if not "%%M"=="" set MEM=%%M
)

set /a MEM_MB=%MEM% / 1048576

if %MEM% gtr %MEM_LIMIT% (
    echo [%TS%] [WARN] %TARGET% メモリ使用量超過: !MEM_MB! MB >> "%LOGFILE%"
) else (
    echo [%TS%] [OK] %TARGET% メモリ: !MEM_MB! MB >> "%LOGFILE%"
)

:MEM_WAIT
timeout /t 60 /nobreak >nul
goto MEM_LOOP

@echo off
setlocal

set APP=C:\apps\myapp.exe
set LOGFILE=C:\logs\exitcode.log
if not exist "C:\logs" mkdir "C:\logs"

:RUN_LOOP
set T=%TIME: =0%
echo [%DATE% %T:~0,8%] %APP% 起動 >> "%LOGFILE%"

REM start /wait でプロセス終了まで待機
start /wait "" "%APP%"
set EXIT_CODE=%ERRORLEVEL%

set T=%TIME: =0%
if %EXIT_CODE% equ 0 (
    echo [%DATE% %T:~0,8%] [OK] 正常終了 EXITCODE=%EXIT_CODE% >> "%LOGFILE%"
) else (
    echo [%DATE% %T:~0,8%] [NG] 異常終了 EXITCODE=%EXIT_CODE% >> "%LOGFILE%"
    REM 異常終了時は10秒待って再起動
    timeout /t 10 /nobreak >nul
    goto RUN_LOOP
)

echo 処理完了
endlocal

@echo off
setlocal enabledelayedexpansion

set TARGET=myapp.exe
set APP_PATH=C:\apps\myapp.exe
set LOGFILE=C:\logs\watchdog.log
set INTERVAL=30
set MAX_RESTART=3
set RESTART_COUNT=0
if not exist "C:\logs" mkdir "C:\logs"

call :log "===== ウォッチドッグ開始 ====="

:WATCHDOG
tasklist /FI "IMAGENAME eq %TARGET%" 2>nul | findstr /i "%TARGET%" >nul
if %ERRORLEVEL% equ 0 (
    call :log "[OK] %TARGET% 動作中"
    set RESTART_COUNT=0
    goto WATCHDOG_WAIT
)

REM --- 異常検知 ---
set /a RESTART_COUNT+=1
call :log "[NG] %TARGET% 停止検知 (再起動: !RESTART_COUNT!/%MAX_RESTART%)"

if !RESTART_COUNT! gtr %MAX_RESTART% (
    call :log "[ABORT] 再起動上限到達。監視を停止します。"
    msg * "%TARGET% の再起動が上限に達しました。手動確認してください。"
    exit /b 1
)

REM ポップアップ通知（ログオン中ユーザーへ）
msg * "[監視] %TARGET% が停止しました。自動再起動します。"

REM 自動再起動
start "" "%APP_PATH%"
call :log "[INFO] %TARGET% を再起動しました"

:WATCHDOG_WAIT
timeout /t %INTERVAL% /nobreak >nul
goto WATCHDOG

:log
set T=%TIME: =0%
echo [%DATE% %T:~0,8%] %~1 >> "%LOGFILE%"
echo [%DATE% %T:~0,8%] %~1
goto :eof