bin/99585: [PATCH] Add option to tee(1) to also copy to
dcp1990 at neptune.atopia.net
Thu Jun 29 16:01:10 UTC 2006
The following reply was made to PR bin/99585; it has been noted by GNATS.
From: Dan Ponte <dcp1990 at neptune.atopia.net>
To: Bruce Evans <bde at zeta.org.au>
Cc: FreeBSD-gnats-submit at freebsd.org, freebsd-bugs at freebsd.org
Subject: Re: bin/99585: [PATCH] Add option to tee(1) to also copy to standard error
Date: Thu, 29 Jun 2006 11:54:57 -0400
On Thu, Jun 29, 2006 at 10:35:57PM +1000, Bruce Evans <bde at zeta.org.au> was witnessed plotting the following conspiracy:
> On Wed, 28 Jun 2006, Dan Ponte wrote:
> > I recently found myself in a situation where having tee(1) copy to
> > standard error and standard output at the same time would be useful,
> > so I implemented it.
> > Find yourself in said situation.
> > Diff below.
> Why not use a standard utility (tee itself in this case)?
> genoutput | tee /dev/stderr | tee foo
> copies the stdout of `genoutput' to stderr and to file foo. This can be
> generalized to any number of copies on any numbers of file descriptors
> or files.
> The main problem with the utility method is is that the plumbing is
> very confusing even for only one extra pipeline stage. /dev/stderr
> in the above refers to the initial stderr so it isn't affected by
> redirection unless the pipeline stages are run in subshells. Running
> some of the stages in subshells makes the plumbing even more confusing.
Hrm...this is a good idea. I never thought about that.
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