#!/usr/bin/perl
###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2007  Michael Tremer & Christian Schmidt                      #
#                                                                             #
# 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 3 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, see <http://www.gnu.org/licenses/>.       #
#                                                                             #
###############################################################################

use strict;

# enable only the following on debugging purpose
#use warnings;
#use CGI::Carp 'fatalsToBrowser';

require '/var/ipfire/general-functions.pl';
require "${General::swroot}/lang.pl";
require "${General::swroot}/header.pl";
require "${General::swroot}/graphs.pl";

my %cgiparams=();

&Graphs::updatememgraph ("day");

&Header::showhttpheaders();
&Header::getcgihash(\%cgiparams);
&Header::openpage($Lang::tr{'memory information'}, 1, '');
&Header::openbigbox('100%', 'left');

&Header::openbox('100%', 'center', "Memory $Lang::tr{'graph'}");
if (-e "$Header::graphdir/memory-day.png") {
	my $ftime = localtime((stat("$Header::graphdir/memory-day.png"))[9]);
	print "<center><b>$Lang::tr{'the statistics were last updated at'}: $ftime</b></center><br />\n";
	print "<a href='/cgi-bin/graphs.cgi?graph=memory'>";
	print "<img alt='' src='/graphs/memory-day.png' border='0' />";
	print "</a>";
} else {
	print $Lang::tr{'no information available'};
}
print "<br />\n";
&Header::closebox();

&Header::openbox('100%', 'center', "Swap $Lang::tr{'graph'}");
if (-e "$Header::graphdir/swap-day.png") {
	my $ftime = localtime((stat("$Header::graphdir/swap-day.png"))[9]);
	print "<center><b>$Lang::tr{'the statistics were last updated at'}: $ftime</b></center><br />\n";
	print "<a href='/cgi-bin/graphs.cgi?graph=swap'>";
	print "<img alt='' src='/graphs/swap-day.png' border='0' />";
	print "</a>";
} else {
	print $Lang::tr{'no information available'};
}
print "<br />\n";
&Header::closebox();

&Header::openbox('100%', 'center', $Lang::tr{'memory'});
print "<table width='95%' cellspacing='5'>";
my $ram=0;
my $size=0;
my $used=0;
my $free=0;
my $percent=0;
my $shared=0;
my $buffers=0;
my $cached=0;
open(FREE,'/usr/bin/free |');
while(<FREE>)
{
        if ($_ =~ m/^\s+total\s+used\s+free\s+shared\s+buffers\s+cached$/ )
        {
    print <<END
<tr>
<td align='center'>&nbsp;</td>
<td align='center' class='boldbase'><b>$Lang::tr{'size'}</b></td>
<td align='center' class='boldbase'><b>$Lang::tr{'used'}</b></td>
<td align='center' class='boldbase'><b>$Lang::tr{'free'}</b></td>
<td align='left' class='boldbase' colspan='2'><b>$Lang::tr{'percentage'}</b></td>
</tr>
END
;
  } else {
    if ($_ =~ m/^Mem:\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)$/) {
      ($ram,$size,$used,$free,$shared,$buffers,$cached) = ($1,$1,$2,$3,$4,$5,$6);
      ($percent = ($used/$size)*100) =~ s/^(\d+)(\.\d+)?$/$1%/;
      print <<END
<tr>
<td class='boldbase'><b>$Lang::tr{'ram'}</b></td>
<td align='center'>$size  KB</td>
END
;
    } elsif ($_ =~ m/^Swap:\s+(\d+)\s+(\d+)\s+(\d+)$/) {
      ($size,$used,$free) = ($1,$2,$3);
      if ($size != 0)
      {
        ($percent = ($used/$size)*100) =~ s/^(\d+)(\.\d+)?$/$1%/;
      } else {
        ($percent = '');
      }
      print <<END
<tr>
<td class='boldbase'><b>$Lang::tr{'swap'}</b></td>
<td align='center'>$size  KB</td>
END
;
    } elsif ($ram and $_ =~ m/^-\/\+ buffers\/cache:\s+(\d+)\s+(\d+)$/ ) {
      ($used,$free) = ($1,$2);
      ($percent = ($used/$ram)*100) =~ s/^(\d+)(\.\d+)?$/$1%/;
      print "<tr><td colspan='2' class='boldbase'><b>$Lang::tr{'excluding buffers and cache'}</b></td>"
    }
    print <<END
<td align='center'>$used KB</td>
<td align='center'>$free KB</td>
<td>
END
;
    &percentbar($percent);
    print <<END
</td>
<td align='left'>$percent</td>
</tr>
END
;
  }
}
close FREE;
print <<END
<tr><td class='boldbase' colspan='2'><br /></td></tr>
<tr><td class='boldbase'><b>$Lang::tr{'shared'}</b></td><td align='center'>$shared KB</td></tr>
<tr><td class='boldbase'><b>$Lang::tr{'buffers'}</b></td><td align='center'>$buffers KB</td></tr>
<tr><td class='boldbase'><b>$Lang::tr{'cached'}</b></td><td align='center'>$cached KB</td></tr>
</table>
END
;
&Header::closebox();

&Header::closebigbox();

&Header::closepage();

sub percentbar
{
  my $percent = $_[0];
  my $fg = '#a0a0a0';
  my $bg = '#e2e2e2';

  if ($percent =~ m/^(\d+)%$/ )
  {
    print <<END
<table width='100' border='1' cellspacing='0' cellpadding='0' style='border-width:1px;border-style:solid;border-color:$fg;width:100px;height:10px;'>
<tr>
END
;
    if ($percent eq "100%") {
      print "<td width='100%' bgcolor='$fg' style='background-color:$fg;border-style:solid;border-width:1px;border-color:$bg'>"
    } elsif ($percent eq "0%") {
      print "<td width='100%' bgcolor='$bg' style='background-color:$bg;border-style:solid;border-width:1px;border-color:$bg'>"
    } else {
      print "<td width='$percent' bgcolor='$fg' style='background-color:$fg;border-style:solid;border-width:1px;border-color:$bg'></td><td width='" . (100-$1) . "%' bgcolor='$bg' style='background-color:$bg;border-style:solid;border-width:1px;border-color:$bg'>"
    }
    print <<END
<img src='/images/null.gif' width='1' height='1' alt='' /></td></tr></table>
END
;
  }
}