You mentioned

watch STDIN in the separate thread, and let it watch for q

Will it work theoretically?

Say, will the thread be able to capture q if it's already consumed by more?

In reply to Re^2: How to know whether user terminates system("$cmd|more") with q or not? by PerlOnTheWay
in thread How to know whether user terminates system("$cmd|more") with q or not? by PerlOnTheWay

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