Yesterday I wrote a multi-threads perl script, codes below is it.

#!perl

use IO::Socket::INET;
use threads;

$server = IO::Socket::INET->new(
        LocalPort        => 90,
        Type             => SOCK_STREAM,
        Reus             => 1,
        Listen           => 10) or die "Server Failed.\n";

$thread_A = threads->new(\&server);
$thread_B = threads->new(\&server);
$thread_C = threads->new(\&server);

@result = ($thread_A->join, $thread_B->join, $thread_C->join);
print "All threads returned, with codes @result\n";

sub server {
        while ($client=$server->accept) {
                for ($second=60; $second>0; --$second) {
                        sleep 1;
                        print $client "$second\n";
                }
                close $client;
        }
        print "Thread: loop while(\$client=\$server->accept) was broke
+n with reason \"unknown\", going to return.\n";
        return 1;
}
[download]

Codes below is the client:

#!perl
use IO::Socket::INET;

$server = IO::Socket::INET->new("127.0.0.1:90");

while (<$server>) {
    print;
}

close $server;
[download]

It's a multi-threads server test, while I run it on my windows with active-perl 5.10.1, I make 3 clients connected to it, and it was working fine, just like what these codes means literally, but on my linux with perl 5.10.0, it's odd, while I interrupted one client with CTRL+C, the server process(I mean whole process with every thread) was quit with neither warning nor error.

This problem was SOLVED with handling $SIG{PIPE} like almut said. Server codes has changed to:

#!perl
use IO::Socket::INET;
use threads;

$SIG{PIPE} = 'IGNORE";

$server = IO::Socket::INET->new(
        LocalPort        => 90,
        Type             => SOCK_STREAM,
        Reus             => 1,
        Listen           => 10) or die "Server Failed.\n";

$thread_A = threads->new(\&server);
$thread_B = threads->new(\&server);
$thread_C = threads->new(\&server);

@result = ($thread_A->join, $thread_B->join, $thread_C->join);
print "All threads returned, with codes @result\n";

sub server {
        while ($client=$server->accept) {
                for ($second=60; $second; --$second) {
                        sleep 1;
                        print $client "$second\n" or last;
                }
                close $client;
        }
        print "Thread: loop while(\$client=\$server->accept) was broke
+n with reason \"unknown\", going to return.\n";
        return 1;
}
[download]

While we attempt to write things to read-side through socket, if the socket of read-side already closed, the write-side would got a signal SIGPIPE, that causes write-side killed by SIGPIPE.

strace is cool.

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