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> what your actual goals are

> but it is not clear to me what you mean by: 
> "multiple users cann follow the output"? 
> Do you mean 'follow' as in tail -f?

> You want the script to launch a process and you 
> want the script to be able to receive that output, 
...
> to monitor that output.

> How?

> - Using concurrent copies of your script?

> - By somehow attaching to 'the one copy' of 
>   your script and your script "broadcasting" the 
>   output to all listeners that attached?

> - By having the program write it's output directly 
>   (or via indirection) to a file and your script 
>   'tail-ing' that file after it has launched the 
>   process--so that other people can also monitor it 
>   using tail -f or whatever they choose?

> - Have your script launch the process and capture 
>   it's output and then, as well as doing whatever it 
>   needs to with it, also write it to a file so that 
>   other peope can monitor that file using tail or 
>   whatever?

> Each of these approaches is possible, but which is 
> appropriate depends entirely upon what your 
> requirements are.