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Date: Thu, 05 Jul 2001 15:00:44 -0700
To: "Karr, David" <david DOT karr AT cacheflow DOT com>,
        "'cygwin AT cygwin DOT com'" <cygwin AT cygwin DOT com>
From: Randall R Schulz <rrschulz AT cris DOT com>
Subject: Re: Pipe "make" stdout and stderr to process?
In-Reply-To: <2C08D4EECBDED41184BB00D0B74733420473EDEE@exchanger.cachefl
 ow.com>
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David,

It's somewhat counterintuitive by comparison to the ordering required in 
the absence of a pipe, but you have to merge stderr (2) into stdout (1) 
before the pipe symbol:

         make 2>&1 |filterprog

Randall Schulz


At 14:13 2001-07-05, Karr, David wrote:
>How do I run "make" so I can pass both stdout and stderr to a filtering
>process?  I'm familiar with writing the output to a file, taking both stdout
>and stderr ("make > make.out 2>&1"), but I don't see how to get this to work
>if I just want to pipe the output (both stdout and stderr) to another
>process.  When I do "make | filterprog 2>&1", it seems to have no effect, in
>that it appears as if the stderr from "make" goes directly to the console.
> >From reading the "bash" man page, it almost seems as if redirection doesn't
>apply to piping.
>
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