#!/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 "Error trying to secure a 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 $sleepint=int(rand(10)); #Stagger start to avoid overwhelming conserver/xCATd
    #print "Opening console in ".(2+(0.5*$sleepint))." seconds...\n";
    #sleep $sleepint;
}
my $sleepint=int(rand(10)); #Stagger start to avoid overwhelming conserver/xCATd
use lib "$::XCATROOT/lib/perl";
if ($^O =~ /^linux/i){
  $ENV{HOME}='/root/';
} else {
  $ENV{HOME}='/';
}
require xCAT::Client;

#require xCAT::Table;
#require xCAT::Utils;
require File::Basename;
import File::Basename;
my $scriptname = $0;

#$mptab = xCAT::Table->new('mp');
#unless ($mptab) {
  #sleep 5; #Try not to overwhelm logfiles...
#  die "mp table must be configured";
#}
#$mpatab = xCAT::Table->new('mpa');
#$passtab = xCAT::Table->new('passwd');

my $username = "USERID";
my $passsword = "PASSW0RD";
my $mm;
my $slot;
#my $dba;
#if ($passtab) {
#  ($dba) = $passtab->getAttribs({key=>blade},qw(username password));
#  if ($dba->{username}) {
#    $username = $dba->{username};
#  }
#  if ($dba->{password}) {
#    $password = $dba->{password};
#  }
#}

#$dba = $mptab->getNodeAttribs($ARGV[0],[qw(mpa id)]);
#$mm = $dba->{mpa};
#$slot = $dba->{id};
#if ($mpatab) {
#  ($dba) = $mpatab->getAttribs({mpa=>$mm},qw(username password));
#  if ($dba) {
#    if ($dba->{username}) { $username = $dba->{username}; }
#    if ($dba->{password}) { $password = $dba->{password}; }
#  }
#}
#xCAT::Utils::close_all_dbhs;
#sleep 5; #Slow start, I know, but with exec, can't return
sub getans {
    my $rsp = shift; 
    if ($rsp->{node}) {
        $mm = $rsp->{node}->[0]->{mm}->[0];
        $username = $rsp->{node}->[0]->{username}->[0];
        $slot = $rsp->{node}->[0]->{slot}->[0];
    }
}
my $cmdref={
    command=>["getbladecons"],
    arg=>["text"],
    noderange=>[$ARGV[0]]
};
xCAT::Client::submit_request($cmdref,\&getans);
until ($mm and $username and $slot) {
    release_lock(); #Let other clients have a go
    $sleepint=10+int(rand(20)); #Stagger to minimize lock collisions, but no big deal when it does happen
    print "Console not ready, retrying in $sleepint seconds (Hit Ctrl-E,c,o to skip delay)\n";
    sleep $sleepint;
    get_lock();
    xCAT::Client::submit_request($cmdref,\&getans);
}
release_lock(); #done with xcatd, can run with near impunity
my $solchkcmd = "ssh -t $username"."@"."$mm sol -T blade[$slot]";
my $solstatus = `$solchkcmd`;
while ($solstatus !~ /SOL Session: Ready/ and $solstatus !~ /SOL Session: Active/) {
    $sleepint=60+int(rand(30)); #Stagger sleep to take it easy on AMM/hosting server
    print "SOL unavailable, retrying in $sleepint seconds (hit Ctrl-E,c,o to skip)\n";
    sleep $sleepint;
    $solstatus = `$solchkcmd`;
}
exec "ssh -t $username"."@"."$mm console -o -T blade[$slot]";
#my $pathtochild= dirname($scriptname). "/";
#exec $pathtochild."blade.expect $mm $slot $username $password";
  
#SECURITY:  In this case, the authentication is expected to be done  using the script user's ssh keys.  As such,
#this script does not receive any particularly sensitive data from the xCAT server.