How to redirect standard stdout to multi stdout ( Bash )?

john.daker · 11-03-2008, 09:57 PM

Hi,all
How to redirect standard stdout to multi stdout ( Bash )?

For example:

Code:

bash:~$ ls
bash:~$ bash
$ exec 11>a
$ exec 12>b
$ exec 1>&11
$ exec 1>&12
$ ls
$ exit
exit
bash:~$ ls -l
-rw-r--r-- 1 jh users 0 2008-11-04 11:55 a
-rw-r--r-- 1 jh users 4 2008-11-04 11:55 b

What I want is the output of `ls` is sendto both a and b

How to do this?

Thanks

gjagadish · 11-03-2008, 10:36 PM

$ ls -lh | tee file1 > file2

Now both file1 and file2 files will have the output of ls -lh command

john.daker · 11-03-2008, 11:02 PM

But what if I want to send the output not to files,like cmd's stdin?

chrism01 · 11-03-2008, 11:04 PM

Can you explain why you want to do this, I've got a feeling you may be asking the 'wrong' qn ie this isn't the soln you want. If you see what I mean..

john.daker · 11-03-2008, 11:20 PM

Simply, what I want is to send the input to several processes;

Take Konsole for example:

Open two sessions in Konsole , one fork the cmd `bc -q` and the other forks the cmd `gdb` , and enable the "Send the input to all sessions" in Konsole.

So when i type `asdf` in session 1 , session 2 got this `asdf` too.

I want my bash script to have this function, send my input to several processes as their input.

How ?

Thanks.