get_xen_info

#!/usr/bin/perl
#Copyright (c) 2009  Eucalyptus Systems, Inc.	
#
#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, only version 3 of the License.  
# 
#This file 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, see <http://www.gnu.org/licenses/>.
# 
#Please contact Eucalyptus Systems, Inc., 130 Castilian
#Dr., Goleta, CA 93101 USA or visit <http://www.eucalyptus.com/licenses/> 
#if you need additional information or have any questions.
#
#This file may incorporate work covered under the following copyright and
#permission notice:
#
#  Software License Agreement (BSD License)
#
#  Copyright (c) 2008, Regents of the University of California
#  
#
#  Redistribution and use of this software in source and binary forms, with
#  or without modification, are permitted provided that the following
#  conditions are met:
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#    Redistributions of source code must retain the above copyright notice,
#    this list of conditions and the following disclaimer.
#
#    Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
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#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
#  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
#  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
#  PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
#  OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
#  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
#  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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#  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
#  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. USERS OF
#  THIS SOFTWARE ACKNOWLEDGE THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE
#  LICENSED MATERIAL, COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS
#  SOFTWARE, AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
#  IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA, SANTA
#  BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY, WHICH IN
#  THE REGENTS’ DISCRETION MAY INCLUDE, WITHOUT LIMITATION, REPLACEMENT
#  OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO IDENTIFIED, OR
#  WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT NEEDED TO COMPLY WITH
#  ANY SUCH LICENSES OR RIGHTS.
#


delete @ENV{qw(IFS CDPATH ENV BASH_ENV)};
$ENV{'PATH'}='/bin:/usr/bin:/sbin:/usr/sbin/';

$ret = 0;

open(FH, "/etc/xen/xend-config.sxp");
while(<FH>) {
    chomp;
    if ($_ =~ /\(dom0-min-mem (\d+)\)/) {
	print "dom0-min-mem=$1\n";
    }
}
close(FH);
exit $ret;

sub untaint() {
    $str = shift;
    if ($str =~ /^([ &:#-\@\w.]+)$/) {
	$str = $1; #data is now untainted
    } else {
	print STDERR "inputs are tainted\n";
	$str = "";
    }
    return($str);
}