windows 检查进程是否使用批处理文件返回 0
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/4451013/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Check if process returns 0 with batch file
提问by Armen Tsirunyan
I want to start a process with a batch file and if it returns nonzero, do something else. I need the correct syntax for that.
我想用批处理文件启动一个进程，如果它返回非零值，请执行其他操作。我需要正确的语法。
Something like this:
像这样的东西：
::x.bat
@set RetCode=My.exe
@if %retcode% is nonzero
handleError.exe
As a bonus, you may consider answering the following questions, please :)
作为奖励，您可以考虑回答以下问题，请:)
- How to write a compound statement with
if? - If the application
My.exefails to start because some DLL is missing will my if work? If not, how can I detect thatMy.exefailed to start?
- 复合语句怎么写
if？ - 如果应用程序
My.exe因为缺少某些 DLL 而无法启动，那么我的 if 会起作用吗？如果没有，我怎么能检测到My.exe无法启动？
回答by Eduard Wirch
ERRORLEVELwill contain the return code of the last command. Sadly you can only check >=for it.
ERRORLEVEL将包含最后一个命令的返回码。遗憾的是，您只能检查>=它。
Note specifically this line in the MSDN documentation for the Ifstatement:
特别注意MSDN 文档中该If语句的这一行：
errorlevel Number
Specifies a true condition only if the previous program run by Cmd.exe returned an exit code equal to or greater than Number.
错误级别数
仅当 Cmd.exe 运行的前一个程序返回等于或大于Number的退出代码时才指定真条件。
So to check for 0 you need to think outside the box:
因此，要检查 0，您需要跳出框框思考：
IF ERRORLEVEL 1 GOTO errorHandling
REM no error here, errolevel == 0
:errorHandling
Or if you want to code error handling first:
或者，如果您想先编写错误处理代码：
IF NOT ERRORLEVEL 1 GOTO no_error
REM errorhandling, errorlevel >= 1
:no_error
Further information about BAT programming: http://www.ericphelps.com/batch/Or more specific for Windows cmd: MSDN using batch files
有关 BAT 编程的更多信息：http: //www.ericphelps.com/batch/或者更具体的 Windows cmd：MSDN using batch files
回答by shf301
How to write a compound statement with if?
如何用if写复合语句？
You can write a compound statement in an if block using parenthesis. The first parenthesis must come on the line with the if and the second on a line by itself.
您可以使用括号在 if 块中编写复合语句。第一个括号必须与 if 一起出现在一行上，第二个括号必须单独出现在一行中。
if %ERRORLEVEL% == 0 (
echo ErrorLevel is zero
echo A second statement
) else if %ERRORLEVEL% == 1 (
echo ErrorLevel is one
echo A second statement
) else (
echo ErrorLevel is > 1
echo A second statement
)
回答by Merky
The project I'm working on, we do something like this. We use the errorlevelkeyword so it kind of looks like:
我正在做的项目，我们做这样的事情。我们使用errorlevel关键字，所以它看起来像：
call myExe.exe
if errorlevel 1 (
goto build_fail
)
That seems to work for us. Note that you can put in multiple commands in the parens like an echo or whatever. Also note that build_fail is defined as:
这似乎对我们有用。请注意，您可以在括号中放入多个命令，例如 echo 或其他任何命令。另请注意， build_fail 定义为：
:build_fail
echo ********** BUILD FAILURE **********
exit /b 1
回答by Techniquab
This is not exactly the answer to the question, but I end up here every time I want to find out how to get my batch file to exit with and error code when a process returns an nonzero code.
这不完全是问题的答案，但每次我想知道如何让我的批处理文件退出时，我都会在这里结束，并在进程返回非零代码时出现错误代码。
So here is the answer to that:
所以这里是答案：
if %ERRORLEVEL% NEQ 0 exit %ERRORLEVEL%
