SystemInfo - Get computer System Model via CMD - Extra spaces bug

问题

I'm trying to get a Computer System Model type via Batch file. for this i've created this script:

systeminfo | find "System Model" > %temp%\TEMPSYSINFO.txt
for /F "tokens=2 delims=:" %%a in (%temp%\TEMPSYSINFO.txt) do set SYSMODEL=%%a
del %temp%\TEMPSYSINFO.txt
set SYSMODEL=%SYSMODEL:~1%
echo %SYSMODEL% >%temp%\SYSMODEL.txt
del %temp%\SYSMODEL.txt
set "Line1=*** System Model: %SYSMODEL%"
echo %Line1%

but when I run it i get extra spaces:

*** System Model:              OptiPlex 9010

Any idea how can I fix it?

回答1:

You're doing it the hard way. Use wmic. It's a lot faster and less complicated to scrape.

for /f "tokens=2 delims==" %%I in ('wmic computersystem get model /format:list') do set "SYSMODEL=%%I"
set "Line1=*** System Model: %SYSMODEL%"
echo %Line1%

wmic lets you query all sorts of neat wmi garbage. wmic /? for more info.

(updated per OP's comment under Fuzzy Button's answer)

回答2:

You could use

for /F "tokens=2* delims=: " %%a in (%temp%\TEMPSYSINFO.txt) do set SYSMODEL=%%b

meaning use delimiters COLON or SPACE, making the text token3 BUT as the text might? include colon or space, the * means 'the rest of the line following the delimiters after token 2the first-mentioned token (2) is the one that gets assigned to%%a, the next highest (*) to%%b`

Now you could also code

for /F "tokens=2* delims=: " %%a in (
 'systeminfo 2^>nul ^| find "System Model" '
 ) do set SYSMODEL=%%b

which means you don't need the TEMPSYSINFO.txt file. This executes the single-quoted command line - the special characters > and | need a caret (^) to 'escape' them (turn off their special meaning) as far as the FOR is concerned (they belong to the quoted command, not the FOR.)

The 2>nul will suppress the SYSTEMINFO progress text.

And it's quite legitimate to break this line - just have to be careful precisely where you do it. Makes the code more readable.

回答3:

For what it's worth, I tried this and it replaced all double spaces to nothing,
with echo =%SYSMODEL%= producing :
=my sysmodel = (just one trailing space) :)

set SYSMODEL=%SYSMODEL: =%

EDIT
So, using Peter's excellent suggestion to put the piped commands into the FOR /F, which I tried that before but came unstuck with a plain | instead of ^| :)

for /F "tokens=2 delims=:" %%a in ('systeminfo 2^>nul ^| find "System Model"') do set SYSMODEL=%%a
set SYSMODEL=%SYSMODEL:  =%

EDIT 2
rojo's answer is great, but it still leaves trailing space for me, so I ended up still using the %var: =% trick

for /f "tokens=2 delims==" %%a in ('wmic computersystem get model /format:list') do set SYSMODEL=%%a
set SYSMODEL=%SYSMODEL:  =%
echo =%SYSMODEL%=

来源：https://stackoverflow.com/questions/15973276/systeminfo-get-computer-system-model-via-cmd-extra-spaces-bug

标签

batch-file

space

extra

sysinfo