Since you are already using Tk, you may be interested in Tk::Fileevent and Tk::IO.

These give you a more generalized way of handling file and socket i/o in a gui event loop. (Basically placing a select() call for you in the gui event loop, you just supply a callback) Do read the CAVEATS and WARNINGS sections though.

In reply to Re: fcntl on Windows by kschwab
in thread fcntl on Windows by Daimun

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