Question

How can I echo a line into multiple files in a single command?
Example: echo Hello World! into file1.log and file2.log

EDIT: Windows-XP Batch Script

CHALLENGE: Give me a one-liner =D. If it can’t be done w/one line I’m not interested.

My solution was

ECHO Hello World!>tmp.log & COPY file1.log + tmp.log & COPY file2.log + tmp.log

But I’m hoping for one that is a single command and not multiple commands.

Answer 1

If you need it only for single lines (of input) you can write your own tee with batch.

@ECHO OFF
rem *** singleLineTee destination1 destination2
setlocal EnableDelayedExpansion
set /p var=
> %1 echo(!var!
> %2 echo(!var!

And use it with echo hello | singleLineTee file1.log file2.log

EDIT: The same as an one liner

echo hello | ( cmd /v:on /c "set /p var=& >> file1.log echo !var!& >> file2.log echo !var!")

The cmd /v:on /c is necessary to enable the delayed expansion