Writing to stderr using /dev/tty?

Question

I want to write to only stderr using /dev/tty . If I write directly to /dev/tty (with tee), it seems like that will print out on stdout. Is that correct? How can I specify that I want to print to stderr?

Currently the line in bash looks like

echo "foo" >&2 | tee /dev/tty | logger -it "my_script"

You have a command that produces output on stdout and stderr, and you want to log stderr and also show it on screen? — that other guy, Jan 23 '14 at 06:01
Perhaps what you really want is `echo "foo" | tee /dev/stderr | logger -it "my_script"` — anishsane, Jan 23 '14 at 06:26
You might find this answer helpful: http://stackoverflow.com/a/692407/1608708 — imp25, Jan 23 '14 at 06:27
@anishsane Didn't see your comment, if you want to post it as an answer I'll delete mine — Reinstate Monica Please, Jan 23 '14 at 06:37

Reinstate Monica Please · Accepted Answer · 2014-01-23T06:47:28.193

If we split apart your command apart with the result of each command after the #

echo "foo" >&2 # echo "foo" and redirect to fd 2 (/dev/sdterr)
| #pipe stdout to  
tee /dev/tty #both send stdout to file /dev/tty, which is terminal file that can output both stdout and stderr depending on what you pass to it (so you probably want /dev/stdout/ or /dev/stderr directly instead) and pass it along to the next pipe
| #pipe stdout to
logger -it "my_script"

So it depends on what you want to do (In the above foo gets redirected to stderr and nothing gets piped to tee)

If you want to print foo to stderr and pass stdout to your script you can just do

echo "foo" | tee /dev/stderr | yourscirpt

Then tee will print to stderr and foo will get piped as stdout to yourscript.

You grokked my intent exactly - printing to current stderr and then piping it along elsewhere. — ChaimKut, Jan 23 '14 at 07:17

Writing to stderr using /dev/tty?

1 Answers1