Dear All,

I have a list containing thousands upon thousands of Win32Xp based hostnames that I need to ping the lot of them! Simultaneously! And, I have this bit of code to do that (....!) 

$|++;
require 5.008;

use strict;
use vars qw /@childs $child @list/;
use threads;
use threads::shared;

my @up: shared; 
my @down: shared;

sub ping_hosts 
{
   my ($ip) = @_;
   print "Testing : $ip\n";
   my $resp = `ping $ip`;
   print "$resp\n";
   if ($_=~ /reply/i)
   {
      push @up, "$ip : Up\n";
   }
   else
   {
      push @down, "$ip : Down\n"; 
   }  
}
open (LST, "c:\\list.txt")||die "$^E : $!\n";
chomp (@list=<LST>);

foreach(@list)
{
    push @childs, threads->create("ping_hosts","$_");
}
foreach $child (@childs)
{
    eval {$child->join();};
}


print @up;
print "\n________________________\n";
print @down;

[download]
However, the script doesn’t seem to work at all! It basically just hangs without any errors!

Have I missed out something of dire importance that made this script hang? It just seems that everything about the script is correct! Yet no output…..Can the blessed/holy ones enlighten me with answers as to the reason why please.

Thanks indeed.

Btw : Is Multithreading in Perl5.8.4 stable? recommended?
Blackadder

In reply to Multi-threading ping of a list of hosts.....Again! by blackadder

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