我刚开始学习如何编写脚本。我想了解系统如何处理错误级别以及它们如何用于错误处理。我知道环境变量%ERRORLEVEL%和系统的错误级别有区别。如果我正确理解这一点,那么代码将在检查前一个命令的错误级别之前检查环境变量。因此,在我的程序中,我试图连接一个启动/停止脚本,它将启动/停止给定机器的所有脚本(用于测试,我只使用一个应用程序notepad.exe作为示例)。我有两个包装脚本,通过将参数传递给独立脚本来启动或停止应用程序。如果独立脚本中存在错误,它将使用命令 EXIT /B n
批处理编程,错误处理和启动命令
命令来设置错误级别。一旦控制权返回给调用脚本,如果退出状态为非零,它将转到错误处理脚本。
首先,我手动将%ERRORLEVEL%设置为零,然后在START或TASKKILL命令之后测试错误。但后来我读了清除%ERRORLEVEL%与 SET ERRORLEVEL=
是一个更好的方法。我的问题进来时,我尝试每当我测试ERRORLEVEL该命令后,它始终是大于或等于1,除非我用SET ERRORLEVEL = 0 I运行启动命令之前
START "" notepad.exe
启动应用程序。我在下面插入了四个脚本的代码。任何见解和建议将不胜感激。
appstart.bat:
@echo off
:: Script for application Start
set ERRORLEVEL=
:: ****
:: Additional Batch files will be executed from within this file
:: Example:
:: Call Appbat01.bat
:: The called batch file should set ERRORLEVEL non-zero if error
:: ****
call test.bat -start
if ERRORLEVEL 1 (call error.bat)
echo.
echo Control was returned to appstart.bat...
:: **** End Calls
goto end
:end
appstop.bat:
@echo off
:: Script for application Start
set ERRORLEVEL=
:: ****
:: Additional Batch files will be executed from within this file
:: Example:
:: Call Appbat01.ba
:: The called batch file should set ERRORLEVEL non-zero if error
:: ****
call test.bat -stop
if ERRORLEVEL 1 (call error.bat)
echo.
echo Control was returned to appstop.bat...
:: **** End Calls
goto end
:end
test.bat的:
@echo off
if "%1"=="-start" goto :start
if "%1"=="-stop" goto :stop
goto wrongParams
:start
::****
:: Insert start up stripts here...
:: If there is an error, set ERRORLEVEL=1
::****
set ERRORLEVEL=0
echo.
echo ********
echo starting the service...
echo.
::start "" "C:\Program Files\Microsoft Office\office11\winword.exe"
start notepad.exe
if ERRORLEVEL 1 goto error
qprocess notepad.exe
echo *Start.success* ERRORLEVEL is: %ERRORLEVEL%
echo.
goto end
:stop
::****
:: Insert stopping stripts here...
:: If there is an error, set ERRORLEVEL>1
::****
set ERRORLEVEL=0
echo.
echo ********
echo stopping the service...
echo.
qprocess notepad.exe
taskkill /f /im notepad.exe
if ERRORLEVEL 1 goto noProcess
goto end
:noProcess
set ERRORLEVEL=2
echo *noProcess* ERRORLEVEL is now: %ERRORLEVEL%
echo.
exit /b 2
:error
:: Errorhandler. Log application status and cause of error here. Set
:: ERRORLEVEL > 1 before returning to caller.
set ERRORLEVEL=1
echo.
echo **** Error handler inside test.bat ****
echo.
echo *error* ERRORLEVEL is now: %ERRORLEVEL%
echo.
exit /b 1
:wrongParams
:: Output an error if the wrong parameters were passed to this script.
:: Maybe try to self correct the parameter...
set ERRORLEVEL=1
echo.
echo '%1' is an invalid parameter.
echo Usage: %0 [-stop ^| -start]
echo *wrongParams* ERRORLEVEL is now: %ERRORLEVEL%
echo.
exit /b 1
:end
error.bat:
@echo off
echo **** You have reached error.bat ****
echo ERRORLEVEL inside of error.bat is: %ERRORLEVEL%
echo.
::*** Handle error...***
goto error%ERRORLEVEL%
:error2
echo The process could not be stopped for some reason.
goto end
:error1
echo The process had an error in start up.
::*** ***
goto end
:end
如果您正在运行代码,这是我遇到错误的地方。如果我使用启动,它会启动记事本,没有任何错误。如果我使用stop,它会停止记事本而没有任何错误。如果我再次使用stop,它会按预期抛出错误。现在,如果我使用启动,它应该再次启动记事本没有任何错误。但是,START命令之后的if语句为true,并且发生错误。我不知道为什么会发生这种情况。请帮忙! – grocky