bash stderr redirect question

code-breaker · 08-06-2006, 12:48 AM

I am writing a bash script that will execute a program. The program displays feedback about its progress through stderr. I can capture this output into a variable, but what I would like to do is have the stderr from that program be both displayed normally in the console (updated in real time), and also captured into a variable so that I can grep it later.

The other related question I have is how do programs overwrite a line in the console, like for progress bars?

Thanks.

acid_kewpie · 08-06-2006, 04:44 AM

i'd suggest either using tee and some juggling (http://www.cpqlinux.com/redirect.html) or just redirect the the file aqlone, and use a tail -f to read anything copied to the file.

as for carriage returns, use \r:

Code:

[chris@kermit ~]$ echo -e 'one\ntwo\rthree'
one
three