noob Pipeline help.

promero · 09-11-2005, 05:35 AM

I have been searching for hours and hours

but I cant find the answer to this problem.

I have a simple pipeline that reads:

command1 | command2 | tee /dev/tty | command3

The problem is the when 'tee /dev/tty' displays the output to my terminal there is so much data that it goes off the screen. I have tried redirecting to 'more' and 'less' but that does not work.

Is there anyway to page the output of 'tee /dev/tty' ?

Please help this

Thanks in advance,

jlliagre · 09-11-2005, 05:51 AM

try:

Code:

command1 | command2 | tee /tmp/out | more ; command3 < /tmp/out

promero · 09-11-2005, 01:00 PM

You rule! That worked like a charm

Now I am going to

up on the syntax you used. (I do not understand why this command does not work with a | to the last command instead of ; )

Thanks again for such a great responce to my first post.

arpanet1969 · 09-11-2005, 01:16 PM

I'm pretty much a n00b myself (even tho i've been using *nix for a few years LOL) but you could send the output of tee to a file, allowing you to read it at a later date:

Code:

command 1 | command 2 | tee /tmp/out >filename.ext | command 4

No?

promero · 09-11-2005, 01:47 PM

arpanet1969,

Thanks for your reply.

Redirecting the 'tee' output to a file to read later is a good idea too. But in this case I wanted to use 'tee /dev/tty' to check the output of part of my pipe as the pipeline ran. (Plus I needed to learn how to page the output of 'tty' for a class I'm taking)

jlliagre · 09-11-2005, 02:02 PM

No.
A command output can't go at the same time to a pipe and to a redirection, at least that way.

promero · 09-11-2005, 03:00 PM

would it have to be:

command1 | command2 | tee outfile.txt | command3

?

jlliagre · 09-11-2005, 03:12 PM

That one works, but doesn't answers your original question which is how to have one program stdout going to two different programs.

promero · 09-11-2005, 03:42 PM

Quote:

Originally posted by jlliagre
but doesn't answers your original question which is how to have one program stdout going to two different programs.

Thanks jlliagre,

Your right. Your original answer was what I was looking for... my second question was just purely academic.