The following code works normally: 
#!/usr/bin/perl

eval {
        local $SIG{ALRM} = sub { 
            die "Timed Out";
        };
        alarm 3;
        sleep 1 while 1;
        
        alarm 0;
};

alarm 0;
    
if ($@ =~ /Timed Out/i) {
    print "Timed-Out waiting for infinite loop to finish\n";
}

[download]
So I guess, your problem is that $socket_resp->recv($recieved_data,1024); blocks until it receives 1024 bytes. Try adding Blocking => 0 to IO::Socket::INET->new() arguments. You would also probably want to substitute my $port = shift; with my $recv_port = shift; (use warnings; warned about it).
Sorry if my advice was wrong.

In reply to Re: alarm not working by aitap
in thread alarm not working by anshumangoyal

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