Pipe output to batch script

Question

I am using grep on windows to filter a file and would like to pipe the output to another batch script.

e.g.

grep "foo" bar.txt | mybatch.bat

and in mybatch i would like to process each matching line

e.g. mybatch.bat:

echo Line with foo: %1

on linux I can solve this via

grep "foo" bar.txt | while read x; do mybatch.sh $x; done

but no idea how I can do this on a windows machine.

Thanks in advance!

Joey · Accepted Answer · 2013-03-05 14:10:06Z

6

You can use for:

for /f %x in ('grep "foo" bar.txt') do call mybatch.cmd "%x"

This will call your batch file once for every non-empty line, just as your shell script example would do.

answered Mar 5, 2013 at 14:10

Joey

357k88 gold badges705 silver badges700 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

user42 Over a year ago

thanks, works well, I output my pipe chain into a temp file and then do the for loop on the temp file (happens in another batch file): for /f "tokens=*" %%x in ('type temp.tmp') do call test.cmd "%%x" but it adds quotes to each line that is passed to the test.cmd so if test.cmd does echo Line is %1 I will get Line is "foo" (with quouts) while the lines in the temp file are without. any trick to get rid of the quotes?

Joey Over a year ago

Use %~1 instead. But there is no need to resort to type in that case, for /f %%x in (temp.tmp) do ... does the same.

n611x007 Over a year ago

this is no pipe... the task may be done but does the question remain actually unanswered? (edit: proposed to rename the question)

Henrik · Accepted Answer · 2016-01-01 19:09:14Z

0

Here's the trick of the trade:

head.bat

@echo off

setlocal ENABLEDELAYEDEXPANSION
set n=%1

for /F "tokens=*" %%x in ('more') do (
echo %%x
set /A n -= 1
if !n! EQU 0 exit /b
)

Using it:

REM print the first 10 lines:
type test.txt | head 10

answered Jan 1, 2016 at 19:09

Henrik

3424 silver badges12 bronze badges

Collectives™ on Stack Overflow

Pipe output to batch script

2 Answers 2

3 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related