#!/usr/bin/perl

my $TARGET					= $ARGV[2];
my $SYSTEM_VERS				= $TARGET . "/System/Library/CoreServices/SystemVersion.plist";
my $FIREWALLDEFAULTFILE 	= $TARGET . "/System/Library/PrivateFrameworks/NetworkConfig.framework/Versions/A/Resources/DefaultFirewallInfo.plist";
my $SAVED_FWDEFAULTFILE		= $FIREWALLDEFAULTFILE . ".applesaved";

# Tiger already has a newer, better DefaultFirewallInfo file, and installing the one in the package is not desireable.

# So, exit if we're not Tiger
exit 0 unless ((-e $SYSTEM_VERS) && CheckVersion($SYSTEM_VERS, "10.4", "ProductVersion", ">="));

# Move aside $FIREWALLDEFAULTFILE so it can be moved back after install
system( "/bin/mv", "-f", $FIREWALLDEFAULTFILE, $SAVED_FWDEFAULTFILE);

exit(0);

########################################################

sub CheckVersion
{
    my $path            = $_[0];
    my $version         = $_[1];
    my $keyName         = $_[2];
    my $operator        = $_[3];
    my $i;
    my $oldSeperator;
    my $plistData;
    my @items;
    my $item;
    my @theVersionArray;
    my @versionArray;
    my %versiondata;

    if (! -e $path) {
        return 0;
    }

    if (!$operator) {
        $operator = "==";
    }

    $oldSeperator = $/;
    $/ = \0;

    open( PLIST, "$path") || do {
        return 0;
    };

    $plistData = <PLIST>;
    $plistData =~ /<dict>(.*?)<\/dict>/gis;

    @items = split(/<key>/, $plistData);

    shift @items;
    foreach $item (@items) {
        $item =~ /(.*?)<\/key>.*?<string>(.*?)<\/string>/gis;
        $versiondata{ $1 } = $2;
    }

    close(PLIST);

    $/ = $oldSeperator;

    @theVersionArray = split(/\./, $versiondata{$keyName});
    for ($i = 0; $i < 3; $i++) {
        if(!$theVersionArray[$i]) {
            $theVersionArray[$i] = '0';
        }
    }

    @versionArray = split(/\./, $version);
    
    my $actualVersion;

    for ($i = 0; $i < 3; $i++) {
        if (($theVersionArray[$i] != $versionArray[$i]) or ($i == 2)) {

            $actualVersion = $theVersionArray[$i];
            $version = $versionArray[$i];

            last;
        }
    }

    my $expression = '$actualVersion ' . $operator . ' $version';
    if( eval ($expression) )
    {
        return 1;
    }
    else
    {
        return 0;
    }

}

