tee stdout to stderr?

I’d like to send stdout from one process to the stdin of another process, but also to the console. Sending stdout to stdout+stderr, for instance.

For example, I’ve got git edit aliased to the following:

git status --short | cut -b4- | xargs gvim --remote

I’d like the list of filenames to be sent to the screen as well as to xargs.

So, is there a tee-like utility that’ll do this? So that I can do something like:

git status --short | 
    cut -b4- | almost-but-not-quite-entirely-unlike-tee | 
    xargs gvim --remote

Answers:

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Method 1

tee can duplicate to the current console by using tee /dev/tty

git status --short | cut -b4- | tee /dev/tty | xargs gvim --remote

Alteratively, you can use /dev/stdoutor /dev/stderr but they could be redirected if your command is within a script. Note that /dev/tty will always be the console (and may not exist in a non-interactive shell). This is wrong, read the comments.

Method 2

A more general solution than /dev/tty:

start cmd:> echo foo | tee /dev/stderr 
foo
foo

Method 3

You can use tee command, just feed it with STDERR file, as example:

tee /dev/stderr
tee /proc/self/fd/2

so in that case your alias maybe:

git status --short | 
    cut -b4- | tee /dev/stderr | 
    xargs gvim --remote

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0