英文:
Strange results quering WMI information
问题
我写了一个简单的批处理文件来快速检查网络接口状态：
@echo off
cls
setlocal
for /f "tokens=2 delims==" %%q in ('wmic path win32_networkadapter where "netconnectionid like '%%ovpn_wintun%%'" get netconnectionstatus /format:list ^| find /i "NetConnectionStatus"') do (
echo q variable is: %%q
IF %%q LEQ 2 echo 1. q less or equal %%q
IF %%q EQU 2 echo 2. q equal %%q
IF %%q GEQ 2 echo 3. q greater or equal %%q
IF %%q LEQ 3 echo 4. q less or equal %%q
IF %%q EQU 3 echo 5. q equal %%q
IF %%q GEQ 3 echo 6. q greater or equal %%q
)
endlocal
pause
并且收到了意外的结果：
将变量作为字符串进行比较没有结果。
请问有人可以解释一下，这是什么情况，是否可以在批处理脚本中修复它？
英文:
I write simple batch file to fast check network interface status:
@echo off
cls
setlocal
for /f "tokens=2 delims==" %%q in ('wmic path win32_networkadapter where "netconnectionid like '%%ovpn_wintun%%'" get netconnectionstatus /format:list ^| find ^/i ^"NetConnectionStatus^"') do (
echo q variable is: %%q
IF %%q LEQ 2 echo 1. q less or equal %%q
IF %%q EQU 2 echo 2. q equal %%q
IF %%q GEQ 2 echo 3. q greater or equal %%q
IF %%q LEQ 3 echo 4. q less or equal %%q
IF %%q EQU 3 echo 5. q equal %%q
IF %%q GEQ 3 echo 6. q greater or equal %%q
)
endlocal
pause
And receive unexpected results:
Compare variables as string have no result.
Can someone explain me, please, what is it and it is fixable in batch script?
答案1
得分: 0
以下是翻译的代码部分：
问题的原因是 wmic 输出不仅是Unicode，而且还包含带有行终止符的输出，如<kbd>CR</kbd><kbd>CR</kbd><kbd>LF</kbd>。
您可以通过将 %%q 输出到文件并使用 editplus 或类似的真实文本编辑器检查该文件来观察到这一点。
这是一个快速修复方法（请注意，我已经修改了 wmic 命令以适应我的系统）
@ECHO OFF
SETLOCAL
for /f "tokens=2 delims==" %%q in ('wmic path win32_networkadapter where "netconnectionid like '%%ethernet%%'" get netconnectionstatus /format:list ^| find /i "NetConnectionStatus"') do (
echo q variable is: %%q
SET /a QQ=%%q
SETLOCAL enabledelayedexpansion
IF !qq! LEQ 2 echo 1. q less or equal %%q
IF !qq! EQU 2 echo 2. q equal %%q
IF !qq! GEQ 2 echo 3. q greater or equal %%q
IF !qq! LEQ 3 echo 4. q less or equal %%q
IF !qq! EQU 3 echo 5. q equal %%q
IF !qq! GEQ 3 echo 6. q greater or equal %%q
endlocal
)
SET Q
GOTO :EOF
英文:
The issue is caused by the fact that wmic output is not only Unicode, but also has an output with line terminals like <kbd>CR</kbd><kbd>CR</kbd><kbd>LF</kbd>.
You could observe this by outputting %%q to a file and examining the file with editplus or a similar real text editor.
Here's a quick-fix (noting that I've modified the wmic command to suit my system)
@ECHO OFF
SETLOCAL
for /f "tokens=2 delims==" %%q in ('wmic path win32_networkadapter where "netconnectionid like '%%ethernet%%'" get netconnectionstatus /format:list ^| find ^/i ^"NetConnectionStatus^"') do (
echo q variable is: %%q
SET /a QQ=%%q
SETLOCAL enabledelayedexpansion
IF !qq! LEQ 2 echo 1. q less or equal %%q
IF !qq! EQU 2 echo 2. q equal %%q
IF !qq! GEQ 2 echo 3. q greater or equal %%q
IF !qq! LEQ 3 echo 4. q less or equal %%q
IF !qq! EQU 3 echo 5. q equal %%q
IF !qq! GEQ 3 echo 6. q greater or equal %%q
endlocal
)
SET Q
GOTO :EOF
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