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package HotSaNICmod::OSdep;

use RRDs;

use lib "../../lib";
use HotSaNICsnmp;

sub version {
  ($VERSION = '$Revision: 1.13 $') =~ s/.*(\d+\.\d+).*/$1/;
  return "default.pm $VERSION";
  }

sub sample {
  my %args=@_;

  my $oid = '.1.3.6.1.4.1.2021.9.1';
            # enterprises.ucdavis.dskTable.dskEntry
            #
  my $suf_device = '.3.'; 
                # .dskDevice
  my $suf_total = '.6.';
                # .dskTotal
  my $suf_used = '.8.';
                # .dskUsed
                
  if ($args{NUM} > 0) {
    undef my %devmax;
    undef my %devuse;
    undef my %devyes;
    undef my %devsnmp;

# $dev $max $use $name $old $d @arr @diskfree $ERROR %ARGS);

# check which drives should be sampled and which existing databases ahve to be updated
#
    foreach (keys(%args)) {
        if(index($_, "DRIVE") == 0 && $args{$_} > 0) {
                if(index($_, "SNMP:") >= 0) {
                        my @arg;
                        my $key; 
                        s/DRIVE:SNMP://;
                        @arg = split ":";
                        $key = join "_", $arg[0], $arg[1];
                        if(defined($devsnmp{$key})) {
                                push @{$devsnmp{$key}}, $arg[2];
                        } else {
                                $devsnmp{$key} = [ $arg[2] ];
                        }
                } else {
                        s/DRIVE://;
                        $devyes{$_} = 1;
                        $devmax{$_} = "U";
                        $devuse{$_} = "U";
                }
        }
      }

#  add/overwrite with summary of all currently available partitions
#  using "df" system command.

    $old="";
    if ( $args{NFSPARTS} == 0) { @diskfree = grep(/\//,`df -lk`); }
    else { @diskfree = grep(/\//,`df -k`); }
      
    foreach $_ (@diskfree) {
      $_="$old $_";
      $old="";
      chomp;
      ($dev,$max,$use) = split;
# check for line-break
      if ((!defined $use) || ($use eq "")) { $old=$_; next; }

      $max*=1024 if defined $max;
      $use*=1024 if defined $use;

      next if !defined($devyes{$dev});
      $devmax{$dev}=$max;
      $devuse{$dev}=$use;
      }

# Begin SNMP conversation here
    foreach ( keys(%devsnmp) ) {
        my ($host, $com) = split "_", $_;
        my @targets = @{$devsnmp{$_}};
        my $res;

        $res = HotSaNICsnmp::snmp_walk($host, $com, ($oid));
        if(keys(%$res) == 0) {
                for (@targets) {
                        $devyes{$host."_".$_} = 1;
                        $devmax{$host."_".$_} = "U";
                        $devuse{$host."_".$_} = "U";
                }
        } else {
                for (my $i=1; defined($$res{$oid.$suf_device.$i}); $i++) { 
                        my $dev = $$res{$oid.$suf_device.$i};

                        for (@targets) {
                                if($_ eq $dev) {
                                        my $total  = $$res{$oid.$suf_total.$i};
                                        my $used   = $$res{$oid.$suf_used.$i};

                                        $devyes{$host."_".$dev} = 1;
                                        $devmax{$host."_".$dev} = $total*1024;
                                        $devuse{$host."_".$dev} = $used *1024;
                                } 
                        }
                }
        }
    }

# End SNMP conversation here

# here begins the evaluation of all sampled data:
#
    foreach $name (keys %devmax) {
      
# check if the device shall really be sampled
#
      if ( defined($devyes{$name}) ) {
        (my $rrdname = $name) =~ s/(\/|:)/_/g;

# build new database if needed and update database
#
        if ( ! -e "rrd/$rrdname.rrd" ) { system("./makerrd","$rrdname","U") }
        RRDs::update "rrd/$rrdname.rrd",time.":".$devmax{$name}.":".$devuse{$name};
        if ($ERROR = RRDs::error) { print time," ",$args{MODNAME},": unable to update `$rrdname.rrd': $ERROR\n"; }
        }
      }
    }
  }

1;