Unfortunately you mix stdio with select here, which makes it rather easy to hang this code. If a client ever sends an incomplete line and then waits, the server will get a readability select for the socket to that client, and then the <$fh> will hang until the client bothers to send a newline (easily demonstrated by setting the telnets you test with to character mode)

The write back is also potentially blocking, so can also hang.

There is also the issue of clients that don't send a proper "exit" but just close the connection (maybe a ^C or a crash). The write back you do for them will cause a SIGPIPE and the program will exit.

I think that the easiest way to write this kind of proxy without all these blocking issues is by using POE. That already takes care of all these issues.

In reply to Re: Re: Single user to multi user socket server by thospel
in thread Single user to multi user socket server by Anonymous Monk

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