#!/usr/bin/perl
#
# Plugin to monitor all S.M.A.R.T. capable disks
# author: paulv@dds.nl / paulv@bikkel.org
# licence : public domain
#
# Usage: copy or link into /etc/munin/plugins/ as smart_[device]  ( smart_sg0 for example)
# Run as root
#
# Parameters:
#
#       config   (required)
#       autoconf (optional - used by munin-config)
#
# Magic markers (optional - used by munin-config and some installation
# scripts):
#
#%# family=manual
#%# capabilities=autoconf
#

use strict;

my $device           = "/dev/$1" if ( $0 =~ /[\w_-]+_(\w+\d+)$/ );
my $smartctl         = 'smartctl';
my $smartctl_param   = ' --attributes ';
my %attr;

if ( $ARGV[0] and $ARGV[0] eq "autoconf" ) {

       print "yes\n";
       exit 0;
}

open(SMART,"$smartctl $smartctl_param $device |") || die $!;

while(<SMART>) {
       chop;
       if ( m/\s*(\d+)\s+([\w_-]+)\s+(\d+x.+)\s+(\d+)\s+(\d+)\s+(\d+)\s+([\w_-]+)\s+(\w+)\s+([\w_-]+)\s+(\d+)/ ) {
               my $key      = $1 . '_' . $2;
               my $rawvalue = $10;

               $key = "170_Reserved_Block_Count"  if $key eq "170_Unknown_Attribute";
               $key = "171_Program_Fail_Count"    if $key eq "171_Unknown_Attribute";
               $key = "172_Erase_Fail_Count"      if $key eq "172_Unknown_Attribute";
               $key = "173_Wear_Leveling_Count"   if $key eq "173_Unknown_Attribute";
               $key = "174_Unexpected_Pwr_Loss"   if $key eq "174_Unknown_Attribute";
               $key = "189_High_Fly_Writes"       if $key eq "189_Unknown_Attribute";
               $key = "202_TA_Increase_Count"     if $key eq "202_Unknown_Attribute";
               $key = "206_Flying_Height"         if $key eq "206_Unknown_Attribute";

               $attr{$key} = $rawvalue;
       }
}


if ( $ARGV[0] and $ARGV[0] eq "config" )
{

   print "graph_title SMART values for $device\n";
   print "graph_args --base 1000 -l 0\n";
   print "graph_category disk\n";
   print "graph_vlabel value\n";
   print "graph_scale  no\n";
   print "graph_total  Total\n";
   foreach my $i (keys %attr)
   {
           print "$i.label smartattribute $i\n";
           print "$i.draw LINE2\n";
           print "$i.min 0\n";
   }
   exit 0;
}

foreach my $k (keys %attr) {
       print $k . ".value " . $attr{$k} . "\n";
}
# end