windows For 循环中的错误级别（批处理窗口）
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Errorlevel in a For loop (batch windows)
提问by JRL
I have the following windows batch code:
我有以下 Windows 批处理代码：
for %%i in (iidbms iigcc iigcd dmfacp dmfrcp rmcmd qwerty) do (
tasklist | findstr /i %%i
echo %errorlevel%
if %errorlevel% == 0 (echo %%i ok process found %errorlevel%)
if %errorlevel% == 1 (echo %%i no process found %errorlevel%)
)
But it doesn't work as I expect.
但它不像我预期的那样工作。
All the name processes iidbms, iigcc, iigcd, dmfacp, dmfrcp, rmcmdare real, and they are found, instead qwertyis an invented one and should not find it, so should print " no process found 1", but it doesn't, it always prints 0.
所有名称进程iidbms、iigcc、iigcd、dmfacp、dmfrcp、rmcmd都是真实的，并且它们被找到，而不是qwerty是一个发明的，不应该找到它，所以应该打印“没有找到进程 1”，但它没有，它总是打印 0。
But what I have noted is that if I run the tasklist | findstr /i qwertyfrom the dos prompt, just after there is that the %errorlevel%= 1.
但是我注意到的是，如果我tasklist | findstr /i qwerty从 dos 提示符运行，则紧随其后的是%errorlevel%= 1。
What sort of answer could be or better is?
什么样的答案可能或更好？
回答by Tim Abell
Add
添加
setlocal EnableDelayedExpansion
to the start of your script, then use
!errorlevel!instead of %errorlevel%
到脚本的开头，然后使用
!errorlevel!而不是%errorlevel%
Delayed Expansion will cause variables to be expanded at execution time rather than at parse time
延迟扩展将导致变量在执行时而不是在解析时扩展
The answer to another question that pointed me in the right direction: https://stackoverflow.com/a/6658935/10245
另一个问题的答案为我指明了正确的方向：https: //stackoverflow.com/a/6658935/10245
回答by JRL
IF ERRORLEVEL returns TRUE if the return code was equal to or higher than the specified errorlevel. In your example, since 0 is lower than 1, the first errorlevel statement will always be true if the actual error code is 0 or above. What you want is to test for errorlevel 1 first.
如果返回代码等于或高于指定的错误级别，则 IF ERRORLEVEL 返回 TRUE。在您的示例中，由于 0 小于 1，如果实际错误代码为 0 或更高，则第一个 errorlevel 语句将始终为真。您想要的是首先测试错误级别 1。
E.g.:
例如：
for %%i in (iidbms iigcc iigcd dmfacp dmfrcp rmcmd qwerty) do (
tasklist | findstr /i %%i
if errorlevel 0 if not errorlevel 1 echo process
if errorlevel 1 if not errorlevel 2 echo process not found
)
Another issue is if you want to echo the actual errorlevel from within the for loop. Since variables are resolved before the start of the loop, echoing %errorlevel% will always echo 0. If you want to echo the value at the execution time, you need to modify the snippet like so:
另一个问题是，如果您想从 for 循环内回显实际错误级别。由于变量是在循环开始之前解析的，因此回显 %errorlevel% 将始终回显 0。如果要在执行时回显值，则需要像这样修改代码片段：
setlocal enabledelayedexpansion
for %%i in (iidbms iigcc iigcd dmfacp dmfrcp rmcmd qwerty) do (
tasklist | findstr /i %%i
if errorlevel 0 if not errorlevel 1 echo %%i ok process found !errorlevel!
if errorlevel 1 if not errorlevel 2 echo %%i no process found !errorlevel!
)
回答by ghostdog74
You can use vbscript,
您可以使用 vbscript，
NumArgs = WScript.Arguments.Count
strComputer="."
Set objWMIService = GetObject("winmgmts:{impersonationLevel=impersonate}!\" & strComputer & "\root\cimv2")
Set colProcessList = objWMIService.ExecQuery("Select * from Win32_Process")
For Each objProcess in colProcessList
For i=0 To NumArgs-1
If InStr( objProcess.Name ,WScript.Arguments(i) ) > 0 Then
WScript.Echo "found:" & WScript.Arguments(i)
End If
Next
Next
Usage:
用法：
C:\test>cscript //nologo test.vbs explorer spool svchost
found:svchost
found:svchost
found:svchost
found:svchost
found:svchost
found:explorer
found:svchost
found:spool
