#!/usr/bin/env perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
use Fcntl qw(:DEFAULT :flock);
sub get_lock {
    unless (flock(LOCKHANDLE,LOCK_EX|LOCK_NB)) {
        $| = 1;
        print "Acquiring startup lock...";
        flock(LOCKHANDLE,LOCK_EX) or die "Fatal error securing startup lock";
        print "done\n";
    }
    truncate(LOCKHANDLE,0);
    print LOCKHANDLE $$."\n";
}

sub release_lock {
    truncate(LOCKHANDLE,0);
    flock(LOCKHANDLE,LOCK_UN);
}
BEGIN
{
    use Time::HiRes qw(sleep);
    use File::Path;
    use Fcntl qw(:DEFAULT :flock);
    $::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : '/opt/xcat';
    umask 0077;
    mkpath("/tmp/xcat/");
    unless (sysopen(LOCKHANDLE,"/tmp/xcat/consolelock",O_WRONLY | O_CREAT)) {
        sleep 15;
        print "Unable to open lock file";
        exit 0;
    }
    get_lock();
    #my $sleepint=int(rand(10));
    #print "Opening console in ".(2+(0.5*$sleepint))." seconds...\n";
    #sleep $sleepint;
}
#BEGIN
#{
#    use Time::HiRes qw(sleep);
#    $::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : '/opt/xcat';
#    my $sleepint=int(rand(10));
#    print "Opening console in ".(0.5*$sleepint)." seconds...\n";
#    sleep (0.5*$sleepint);
#}
my $sleepint;
use lib "$::XCATROOT/lib/perl";
$ENV{HOME}='/root/';
require xCAT::Client;

require File::Basename;
import File::Basename;
my $scriptname = $0;

my $cmdref={
    command=>"getxencons",
    arg=>"text",
    noderange=>$ARGV[0]
};
use Data::Dumper;
my $dsthost;
my $dstty;
my $speed;
sub getans {
    my $rsp = shift; 
    if ($rsp->{node}) {
        $dsthost = $rsp->{node}->[0]->{sshhost}->[0];
        $dstty = $rsp->{node}->[0]->{psuedotty}->[0];
        $speed = $rsp->{node}->[0]->{baudrate}->[0];
    }
}
xCAT::Client::submit_request($cmdref,\&getans);
until ($dsthost and $speed and $dstty) {
    release_lock();
    $sleepint=int(rand(30))+60;
    print "Console not ready, retrying in $sleepint seconds (Ctrl-e,c,o to skip delay)\n";
    sleep $sleepint;
    get_lock();
    xCAT::Client::submit_request($cmdref,\&getans);
}
release_lock();
exec "ssh -t $dsthost screen -U -a -O -e ^]a -d -R -S serial-".$ARGV[0]."-cons -A $dstty $speed";

#my $pathtochild= dirname($scriptname). "/";
#exec $pathtochild."blade.expect $mm $slot $username $password";