CODEWITHSUNDEEP
windowsbatch-file
Lone Learner
Lone Learner

Reputation: 20648

How can a batch file read piped input and write the result to a file?

I want to write a Windows batch script foo.cmd such that when I pipe in any text to its standard input, it writes that text to a file called foo.txt.

echo hi | foo

The above command should create a file named foo.txt and write the text hi to it.

I tried this code in foo.cmd.

@echo off
copy con foo.txt

But this doesn't work. When I run echo hi | foo, the script simply waits for me to enter input via the terminal, i.e. Command Prompt window. It doesn't read the input piped it to.

How can I solve this problem?

Note that the text being piped may have multiple lines.

Upvotes: 0

Views: 1097

Answers (1)

dbenham
dbenham

Reputation: 130849

All you need is a single simple FINDSTR command. The "^" search term is a regular expression that matches all lines of input.

@findstr "^" >foo.txt

Upvotes: 4

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