It would be helpful if you explained your situation in some more detail. If there is just a fixed set of stuff that you are going to type into this program without caring what the prompts that it says are, then
will often do the job. You could use Perl to make a shell script that potentially could do what you need. The most complicated version of this is having a Perl program "act like you would act" and respond differently to different prompts. Without more information, I am hesitant to recommend that approach because easier solutions might work for you.