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From: =?utf-8?Q?Lawrence_Vel=C3=A1zquez?= <vq@larryv.me>
Newsgroups: gnu.bash.bug
Subject: Re: bash 1-liner or function to tee to STDERR in middle of pipe?
Date: Fri, 3 Jul 2020 14:03:20 -0400
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> On Jul 3, 2020, at 10:32 AM, bug-bash@trodman.com wrote:
>=20
> This does what I want:=20
>=20
> --8<---------------cut here---------------start------------->8---=20
> _tee_stderr ()=20
> {=20
>     <<'____eohd'
>    SYNOPSIS
>=20
>        ourname
>=20
>    DESCRIPTION
>=20
>        Use in a pipe. Leaks STDIN to STDERR. Passes STDIN to STDOUT =
unchanged.
>=20
>    EXAMPLE
>=20
>        $ seq 5 |_tee_stderr |tail -2 > /tmp/bar ; echo;cat  /tmp/bar
>        1
>        2
>        3
>        4
>        5
>=20
>        4
>        5
>=20
> ____eohd
>=20
>    ( tmpf=3D$( mktemp ~/tmp/$FUNCNAME.XXX );
>    cat > $tmpf;
>    cat $tmpf 1>&2;
>    cat $tmpf;
>    rm -f $tmpf );
>    return;
> }
> --8<---------------cut here---------------end--------------->8---=20
>=20
> What is better/cleaner?

An ad hoc function that forcibly writes the entire input to disk
and doesn't even clean up after itself if it's interrupted, versus
a widely known, standard tool that's just as easy to use?

What's wrong with `foo | tee /dev/stderr | bar`?

vq=