Is there a way to redirect stderror to stdout for the duration of a script in Windows?

Question

As a long time UNIX shell scripter / release engineer coming into the Windows environment full time with my latest job, there are some things I inevitably miss.

One of them is my trusty old 'exec 2>&1' which in the Bourne shell permently knots together stderr and stdout for the duration of the script, so that logging will capture everything good and bad.

I realize you can append 2>foo.log to the end of every command line invocation, but I'm wondering if there's a better way.

Is there any equivalent in the Windows environment? We're using both .BAT file scripts and Perl scripts here (Mostly for build automation but also some other things) and I'd dearly love to know if this is possible at all.

Answer 1

Read this KB article from MS. Sample taken from the said article:

You can print the errors and standard output to a single file by using the "&1" command to redirect the output for STDERR to STDOUT and then sending the output from STDOUT to a file:

 dir file.xxx 1> output.msg 2>&1

Answer 2

In Perl you can do

open STDERR, '>&STDOUT' or die "Can't dup STDOUT";

to redirect the STDERR output of the script to STDOUT. See the open documentation for more info. I wouldn't expect this to effect the output of system calls, i.e. system or backticks.

Answer 3

The 2>&1 thing seems to be working for me for scripts:

testcmd.cmd > stdboth.txt 2>&1

What exactly are you doing and what are you expecting when you're doing it?

Answer 4

You can apply redirection to command blocks as well as single commands

(
echo 1
dir
echo 2
) >somefile.txt

Note that it is impossible to use labels and goto inside of command blocks, though.