Hello, I'm trying to write an automated test management tool that drives a device via a TCP/IP socket. I need a listener that runs continuously asynchronously, and occasionally interacts with the sender. Perl threads and the Thread:Queue module would seem to fit the bill nicely. I've written client code based largely on Lincoln Stein's book. I can't get my code to run on Windows (tried pxperl and activestate perl), but it does work on my Solaris8 system. I've created this scrap of code which reproduces the problem. Again, it works on unix but but not windows: 
#!/usr/bin/perl5.8.8 -w
use strict;
use warnings;
use threads;
use IO::Socket qw(:DEFAULT :crlf);

my $host = shift || 'localhost';

my $socket = IO::Socket::INET->new(PeerAddr => $host,
                   PeerPort => 'ftp',
                   Proto    => 'tcp',
                   Type        => SOCK_STREAM,
                   Timeout  => 5)
  or die "Couldn't connect to remote host: $@\n";
my $listenerThread = threads->create(\&listener, $socket) or die "$@\n
+";

while (<STDIN>) {
  chomp;
  print $socket $_, CRLF;
};
exit(0);

sub listener($) {
  my $s = shift;
  my $data;
  $/ = CRLF;
  syswrite(STDOUT, $data) while sysread($s, $data, 2048); 
  print "\nListener exiting\n";
};
__END__

[download]
My program and this snippet always hang up after typing something to STDIN, like "help". Note that I am using the same unix $host in all cases.

Any ideas would be appreciated.

Thanks,
Kevin Zwack

In reply to Sockets and threads, oh my! by KevinZwack

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