IO::Socket does handle Timeout, what's more, it actually works in the server part of IO::Socket::UNIX. This server will stop if it doesn't receive a connection within 2 seconds: 
#!/usr/bin/perl
use strict;
use warnings;
use IO::Socket::UNIX;

use constant SOCKET => 'test_socket.sock';

my $mode = shift or die "Specify a mode\n";

if ($mode eq 'server') {
    my $server = IO::Socket::UNIX->new(
        Type    => SOCK_STREAM,
        Local   => SOCKET,
        Listen  => 1,
        Timeout => 2,
    ) or die $!;
    while (my $conn = $server->accept()) {
        my $name = <$conn>;
        print {$conn} "Hello $name";
        close $conn;
    }
    print 'Timed out', "\n";
}
elsif ($mode eq 'client') {
    my $client = IO::Socket::UNIX->new(
        Type    => SOCK_STREAM,
        Peer    => SOCKET,
    ) or die $!;
    print {$client} 'John', "\n";
    print "Got reponse: ", scalar <$client>;
    close $client;
}
else {
    die "Unsupported mode: $mode\n";
}

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In reply to Re^2: Making IO::Socket::UNIX client time out by kroach
in thread Making IO::Socket::UNIX client time out by kroach

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