package HotSaNICmod::OSdep;

# return module version
#
sub version {
  ($VERSION = '$Revision: 1.15 $') =~ s/.*(\d+\.\d+).*/$1/;
  return "$^O.pm $VERSION";
  }

# sample data
#
sub sample {
  my %args=@_;

  @sections = split " ", ($args{SECTIONS});
  foreach (@sections){
    if ($_ eq "cpu")    {read_cpu(%args)} 
    elsif ($_ eq "load")   {read_load(%args)}
    elsif ($_ eq "proc")   {read_proc(%args)}
    elsif ($_ eq "mem")    {read_mem(%args)}
    elsif ($_ eq "users")  {read_users(%args)}
#    elsif ($_ eq "irq")    {read_interrupts(%args)}
#    elsif ($_ eq "uptime") {read_uptime(%args)}
    }

  }

# users.rrd -> tty pty pts
# cpu.rrd -> cpuusr cpusys cpuwait cpuidl
# load.rrd -> load15 load5 load1
# proc.rrd -> procslp procrun proczmb procstp
# mem.rrd (Linux) -> memfre memshr membuf memcac swpfre swpuse

#####################################################################################
# build CPU statistics
# in /proc/stat there is a CPU entry which provides us with the
# number of ticks the CPU was in all states ( user nice system idle )
# We simply have to gather this information and calculate the actual percentage :)
# To do this we have to remember the last read values of course!
#
sub read_cpu {
  my %args=@_;
  my $multicpu=0;

# vmstat -s
#
# 23506934 user   cpu
# 2794729 system cpu
# 44912336 idle   cpu
# 449606 wait   cpu

  # read actual state
  @lines=`kstat cpu_stat`;

#  module: cpu_stat                        instance: 0
#  name:   cpu_stat0                       class:    misc
#          idle                            23071073
#          kernel                          1159786
#          user                            11466265
#          wait                            200397
#

  $cpu1{cpu}=0;
  $cpu2{cpu}=0;
  $cpu3{cpu}=0;
  $cpu4{cpu}=0;
  $cpu5{cpu}=0;

  foreach (@lines) {
    ($name,$value)=split;
    if (defined $name) {
      if (!defined $value) { $value=0; }
      if ( $name eq "name:") {
        ($cpu=$value) =~ s/_stat//;
        $cpu1{$cpu}=0;
        $cpu2{$cpu}=0;
        $cpu3{$cpu}=0;
        $cpu4{$cpu}=0;
        $cpu5{$cpu}=0;
        $cpu1old{$cpu}=0;
        $cpu2old{$cpu}=0;
        $cpu3old{$cpu}=0;
        $cpu4old{$cpu}=0;
        $cpu5old{$cpu}=0;
        if ($cpu eq "cpu1") {$multicpu=1; }
        }
      if ($name eq "user")   { $cpu1{$cpu}=$value; $cpu1{cpu}+=$value; }
      if ($name eq "kernel") { $cpu2{$cpu}=$value; $cpu2{cpu}+=$value; }
      if ($name eq "wait")   { $cpu3{$cpu}=$value; $cpu3{cpu}+=$value; }
      if ($name eq "idle")   { $cpu4{$cpu}=$value; $cpu4{cpu}+=$value; }
      }
    }

  # read last state and store actual state
  # usr nice sys idle int
  my $DATFILE=$args{VARDIR}."/cpu.dat";
  if ( -e $DATFILE ) {
    open(CPU,$DATFILE);
    while (<CPU>) {
      $line=$_." 0 0 0 0 0 0";
      ($cpu, $cpu1old, $cpu2old, $cpu3old, $cpu4old, $cpu5old)=split / /,$line;

      if ($cpu !~ /cpu/) {
        $cpu5old=$cpu4old;
        $cpu4old=$cpu3old;
        $cpu3old=$cpu2old;
        $cpu2old=$cpu1old;
        $cpu1old=$cpu;
        $cpu="cpu";
        }

      $cpu1old{$cpu}=$cpu1old;
      $cpu2old{$cpu}=$cpu2old;
      $cpu3old{$cpu}=$cpu3old;
      $cpu4old{$cpu}=$cpu4old;
      $cpu5old{$cpu}=$cpu5old;
      }
    close(CPU);
    }

  open(CPU,">".$DATFILE);

  foreach $cpu (sort keys %cpu1) {
    print CPU $cpu." ".$cpu1{$cpu}." ".$cpu2{$cpu}." ".$cpu3{$cpu}." ".$cpu4{$cpu}." ".$cpu5{$cpu}."\n";

# calculate everything....
#

    $all{$cpu}=($cpu1{$cpu}+$cpu2{$cpu}+$cpu3{$cpu}+$cpu4{$cpu}+$cpu5{$cpu})-($cpu1old{$cpu}+$cpu2old{$cpu}+$cpu3old{$cpu}+$cpu4old{$cpu}+$cpu5old{$cpu});

    $cpuusr{$cpu}=($cpu1{$cpu}-$cpu1old{$cpu})/$all{$cpu};
    $cpunic{$cpu}=($cpu2{$cpu}-$cpu2old{$cpu})/$all{$cpu};
    $cpusys{$cpu}=($cpu3{$cpu}-$cpu3old{$cpu})/$all{$cpu};
    $cpuidl{$cpu}=($cpu4{$cpu}-$cpu4old{$cpu})/$all{$cpu};
    $cpuint{$cpu}=($cpu5{$cpu}-$cpu5old{$cpu})/$all{$cpu};

# store data
#

   HotSaNICmod::do_rrd($cpu,"U",time,$cpuusr{$cpu},$cpunic{$cpu},$cpusys{$cpu},$cpuidl{$cpu});

# on single-cpu machines only the global database has to be updated.
#
    last if ($multicpu==0);

    }
  close(CPU);
  }



#####################################################################################
# here we go with the load-average value ...
#
sub read_load {
  my %args=@_;
  ($_)=`uptime`;
  @values=split;
  $load15=pop @values;
  $load5=pop @values;
  $load1=pop @values;

  HotSaNICmod::do_rrd("load","U",time,$load15,$load5,$load1);
  }



#####################################################################################
# now the processes. We have to check how many processes are sleeping,
# running, zombieng spwapped to disc or stopped. To do this we simply
# have to walk through the /proc tree, check all "stat" files of each
# process-id subdir and increment the according state-counter.
#
sub read_proc {
  my %args=@_;
  ($procslp,$procrun,$proczmb,$procstp,$procque)=(0,0,0,0,0);

  open FILE,"ps -aef -o s|";
  while (<FILE>) {
    if (index($_,"S") >=0 ) { $procslp++ }
    elsif (index($_,"R") >=0 ) { $procque++ }
    elsif (index($_,"O") >=0 ) { $procrun++ }
    elsif (index($_,"Z") >=0 ) { $proczmb++ }
    elsif (index($_,"T") >=0 ) { $procstp++ }
    }
  close FILE;

  HotSaNICmod::do_rrd("proc","U",time,$procslp,$procrun,$proczmb,$procstp,$procque);
  }

#####################################################################################
# read users stats
#
sub read_users {
  my %args=@_;
  @users=`who`;
  ($tty,$pty,$pts)=(0,0,0);
  foreach (@users) {
    if (index($_," tty") >=0 ) { $tty++; }
    elsif (index($_," pty") >=0 ) { $pty++; }
    elsif (index($_," pts") >=0 ) { $pts++; }
    }

  HotSaNICmod::do_rrd("users","U",time,$tty,$pty,$pts);
  }

####################################################################################
# here we go with the memory and swapfile statistics...
#
sub read_mem {
  my %args=@_;

  # read swap state
  ($_)=`swap -s`;
  @stats=split;
  ($swpuse=$stats[8]) =~ s/k//;
  ($swpfre=$stats[10]) =~ s/k//;
  $swpuse*=1024;
  $swpfre*=1024;

  # read memory state
  $memshr=0;
  $memtot=0;
  $memfre=0;
  $membuf=0;
  $memcac=0;

  ($line)=grep /^Memory:/, `top -b`;

  # Memory: 4096M real, 154M free, 339M swap in use, 20G swap free

  @fields=split / /,$line;
  ($memtot=$fields[1]) =~ s/M//g;
  ($memfre=$fields[3]) =~ s/M//g;

  $memtot*=1048576;
  $memfre*=1048576;

  $memshr=$memtot-$memfre;

  HotSaNICmod::do_rrd("mem","U",time,$memfre,$memshr,$membuf,$memcac,$swpfre,$swpuse);
  }

sub read_interrupts {
  my %args=@_;

  # intr 905974335 490612570 3015 0 0 0 3 3 3 2 71611549 0 145961329 197785844 0 0 17 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

  my @stats;
  open FILE,"/proc/stat";
  while (<FILE>) { (undef,@stats)=split if /intr/; }
  close FILE;

  # need first 17 values from array
  HotSaNICmod::do_rrd("irq","U",time,@stats[0..16]);
  }



#####################################################################################
# here we go with the load-average value ...
#
sub read_uptime {
  my %args=@_;
  open(IN,"/proc/uptime"); ($up,$idle)=split(/ /,<IN>); close(IN);
  $up/=86400;
  $idle/=86400;

  HotSaNICmod::do_rrd("uptime","U",time,$up,$idle);
  }

1;

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