windows - Capture output command CMD

Question

Platform Windows XP

When writing a command file (.bat) how can i "catch" the output from a command into a variable ?

I want to do something like this

SET CR='dir /tw /-c b.bat | findstr /B "[0-9]"'

But this do not work

Regards Stefan

PS No, I can not dowload grep, cygwin or any other software, it have to be the CMD DS

Answer 1

You can use for /f for that:

for /f %%L in ('dir /tw /-c b.bat ^| findstr /b "[0-9]"') do set CR=%%L

This assumes that there is only a single line of output, though. You cannot (trivially or usefully) capture more than one line in a variable.

I can only guess what you're really trying to do here, though. If you need the file size (just guessing because of the /-c) then it's certainly easier to use

for %%X in (b.bat) do set size=%%~zX