#!/usr/bin/perl

=head1 NAME

processes - Plugin to monitor the number of processes on the machine.
Using "ps | wc -l".

=head1 CONFIGURATION

No configuration

=head1 NOTES

=head2 DESCRIPTION

This will report back the number of processes currently running on a
server.  By default it will report back the total number of processes
running (global).  Optionally you can edit the script and add items to
look for to the "lookFor" array.  These should be simple things that
can be grep'd for.

=head2 RESCTRICTIONS

None known.  /usr/bin/ps should be executable by everyone by default.

Optionally you can add items to the lookFor array, and those items
will be graphed as well.  This can be useful for watching how many
processes of a particular type are running.

=head1 AUTHOR

Unknown author

=head1 LICENSE

GPLv2

=head1 MAGIC MARKERS

 #%# family=contrib
 #%# capabilities=autoconf

=cut

use strict;


my(@lookFor) = ("root");

if($ARGV[0] && $ARGV[0] eq "autoconf")
  {
    if(-e "/usr/bin/ps" && -X "/usr/bin/ps")
      {
        print "yes\n";
        exit 0;
      }
    else
      {
        print "no\n";
        exit 0;
      }
  }

my($item);
if($ARGV[0] && $ARGV[0] eq "config")
  {
    print "graph_title Number of Processes\n";
    print "graph_args --base 1000 -l 0 \n";
    print "graph_vlabel number of processes\n";
    print "graph_category processes\n";
    print "global.label global\n";
    print "global.draw LINE2\n";

    foreach $item (@lookFor)
      {
        print "$item.label $item\n";
        print "$item.draw LINE2\n";
      }
  }

my($procNum);
foreach $item (@lookFor)
  {
    $procNum = `/usr/bin/ps -ef|grep $item|grep -v grep |wc -l`;
    chomp($procNum);

    print "$item.value $procNum\n";
  }

$procNum = `/usr/bin/ps -ef|grep -v grep|wc -l`;
chomp($procNum);
print "global.value $procNum\n";