#!/usr/bin/perl

# Copyright (C) 2007-2015 X2Go Project - http://wiki.x2go.org
# Copyright (C) 2007-2015 Oleksandr Shneyder <oleksandr.shneyder@obviously-nice.de>
# Copyright (C) 2007-2015 Heinz-Markus Graesing <heinz-m.graesing@obviously-nice.de>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the
# Free Software Foundation, Inc.,
# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.

use strict;
use Sys::Syslog qw( :standard :macros );

use X2Go::Server::DB qw(dbsys_listsessionsroot_all dbsys_listsessionsroot dbsys_rmsessionsroot);
use X2Go::Log qw(loglevel);

openlog($0,'cons,pid','user');
setlogmask( LOG_UPTO(loglevel()) );


sub check_pid
{
	my $pid=shift;
	my $sess=shift;
	open (F,"</proc/$pid/cmdline") or return 0;
	my $text=<F>;
	close (F);
	if ($text =~ m/$sess/)
	{
		return 1;
	}
	return 0;
}

my $serv=shift;
my @array;
if($serv eq "--all-servers")
{
	@array=dbsys_listsessionsroot_all();
}
else
{
	@array=dbsys_listsessionsroot ($serv);
}
my $i;
for ( $i=0;$i<@array;$i++) 
{
	my @ln=split('\|',@array[$i]);
	if ((@ln[4] eq "F") && (!check_pid(@ln[0], @ln[1])))
	{
		my $sid = @ln[1];
		dbsys_rmsessionsroot($sid);
		syslog('debug', "Purging finished session from X2Go db, session ID: $sid");
	}
	print "@array[$i]\n";
}

# closing syslog 
closelog;
