Child - ftpDirectoryListing: 449048769
Parent: currentListing: abc.xml xyz.xml    deDuppedArray: dedup1.xml dedup2.xml
Child - ftpDirectoryListing: 449049011
Parent: currentListing: abc.xml xyz.xml    deDuppedArray: dedup1.xml dedup2.xml

##</code><code>##

Child - ftpDirectoryListing: abc.xml xyz.xml
Parent: currentListing: abc.xml xyz.xml    deDuppedArray: dedup1.xml dedup2.xml
Child - ftpDirectoryListing: abc.xml xyz.xml
Parent: currentListing: abc.xml xyz.xml    deDuppedArray: dedup1.xml dedup2.xml

##</code><code>##

#! /usr/bin/perl -w

use strict;
use lib "/nss/nfx/shmem/lib/lib";
use lib "/nss/nfx/shmem/lib/lib64";
use lib "/nss/nfx/shmem/lib/lib/perl5/site_perl/";

use File::Basename;
use Getopt::Long;
use File::Copy;
use Data::Dumper;
use strict;
use IPC::Shareable;

my $child;
my $serv_id;
my $maxRcvrCount;
my $stripeInstance;
my $maxStripeInstance;

my $user;
my @ftpDirectoryListing=();
my @deDuppedArray=();
my @filesDownloaded=();
my $glue = 'data';
my %options = (
     create    => 0,
     exclusive => 1,
     mode      => 0644,
     destroy   => 0,
 );
my $deDuppedArrayHandle = tie @deDuppedArray, 'IPC::Shareable', 'data', \%options;
my $filesDownloadedHandle = tie @filesDownloaded, 'IPC::Shareable', 'kala', \%options;

sub pollDaemonParent
{
    my $user = $_[0];
    my @previousListing=(); my @currentListing=();

    while (1)
    {
        @previousListing = @currentListing;
        @currentListing = getListing($user);

        $deDuppedArrayHandle->shlock();
        @deDuppedArray = deDupArray1(\@previousListing, \@currentListing);

        print "Parent: currentListing: @currentListing    deDuppedArray: @deDuppedArray\n";

        $deDuppedArrayHandle->shunlock();

        select (undef, undef, undef,.5);
    }
}
sub pollDaemonChild
{
    my $user = $_[0];

    while (1)
    {

        @ftpDirectoryListing = ();

        $deDuppedArrayHandle->shlock();
        @ftpDirectoryListing = @deDuppedArray;
        $deDuppedArrayHandle->shunlock();

        if ($#ftpDirectoryListing >=  0)
        {
            print "Child - ftpDirectoryListing: @ftpDirectoryListing\n";
        }
        select (undef, undef, undef,1);

    }
}
sub getListing
{
    my @ftpListing1 = ();
    push (@ftpListing1, "abc.xml");
    push (@ftpListing1, "xyz.xml");

    return @ftpListing1;
}
sub deDupArray1
{
    my @difference = ("dedup1.xml", "dedup2.xml");
    return @difference;
}
sub addToDeleteList
{
    $|++;
    $filesDownloadedHandle->shlock();
    push (@filesDownloaded, "$_[0]");
    $filesDownloadedHandle->shunlock();
}
# main
{
    $user = "IAmUser";
    $serv_id = "1";
    $maxRcvrCount = "5";
    $stripeInstance = "1" ;
    $maxStripeInstance = "2";

    $SIG{'ALRM'} = 'sig_alrm';

my $startingInstanceNum=1;
my @kids;
for (1 .. $maxStripeInstance)
{

    $stripeInstance = $startingInstanceNum;
    unless ($child = fork)
    {        # i'm the child
        die "cannot fork: $!" unless defined $child;
        pollDaemonChild($user);
        exit;
    }

    push @kids, $child;  # in case we care about their pids
    $startingInstanceNum++;
}
print "@kids\n";
pollDaemonParent($user);
}