Windows批处理文件中的Head -1

Question

I'd like to get the first line only from the following command output in windows pe. See below:

wmic nic where "NetConnectionStatus=2" get netconnectionid |findstr /v "^Net"|findstr /v "^$"

Select -First would be an option, but it doesn't work. I'm not familiar with windows too much I'm familiar with linux.

How could I get only the first line of the output.

If it's possible without findstr even better.

Answer 1

How to get the first line is described here at SO . But you have to escape the ^ and the | characters like it's said in this guide .

The following snipped will work:

@echo off

set "command=wmic nic where "netconnectionstatus=2" get netconnectionid ^| findstr /v "^^net" ^| findstr /v "^^$""
echo command: ^<%command%^>

for /f "delims=" %%a in ('%command%') do (
    set tempvar=%%a
    goto :print 
)

:print
echo result: %tempvar%

I think the last pipe to findstr /v "^^$"" is unnecessary.

Answer 2

Finally a temporary file can help the best:

@echo off
wmic nic where "NetConnectionStatus=2" get netconnectionid |findstr /v "^Net"|findstr /v "^$" >tmp.tmp
set /p etc=<tmp.tmp
echo %etc%