Re: bash 1-liner or function to tee to STDERR in middle of pipe?

[Lawrence Velázquez]

> On Jul 3, 2020, at 10:32 AM, bug-bash@trodman.com wrote:
> 
> This does what I want: 
> 
> --8<---------------cut here---------------start------------->8--- 
> _tee_stderr () 
> { 
>     <<'____eohd'
>    SYNOPSIS
> 
>        ourname
> 
>    DESCRIPTION
> 
>        Use in a pipe. Leaks STDIN to STDERR. Passes STDIN to STDOUT unchanged.
> 
>    EXAMPLE
> 
>        $ seq 5 |_tee_stderr |tail -2 > /tmp/bar ; echo;cat  /tmp/bar
>        1
>        2
>        3
>        4
>        5
> 
>        4
>        5
> 
> ____eohd
> 
>    ( tmpf=$( mktemp ~/tmp/$FUNCNAME.XXX );
>    cat > $tmpf;
>    cat $tmpf 1>&2;
>    cat $tmpf;
>    rm -f $tmpf );
>    return;
> }
> --8<---------------cut here---------------end--------------->8--- 
> 
> 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