Thanks all for the answers, let me detail the situation again, The third party script after completion (first round) ask a question: 
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Manually if i supply an "X" then it quits the script but as i am calling this third party script from my perl script i want perl to terminate that script so that the output of the thirdpartyscript can be written to a file(by perl) and so that i can use that file. Sorry if you replied to the exact scenario. Thanks

In reply to Re^2: How to call a script interactively from perl by LetMeAsk
in thread How to call a script interactively from perl by LetMeAsk

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