1 files changed, 146 insertions, 0 deletions

diff --git a/contrib/check_mem.pl b/contrib/check_mem.pl
new file mode 100644
index 0000000..f0c8212
--- /dev/null
+++ b/contrib/check_mem.pl
@@ -0,0 +1,146 @@
+#!/usr/bin/perl -w
+# $Id$
+
+# check_mem.pl Copyright (C) 2000 Dan Larsson <dl@tyfon.net>
+#
+# 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 2
+# 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 (or with Nagios);  if not, write to the
+# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA
+
+# Tell Perl what we need to use
+use strict;
+use Getopt::Std;
+
+use vars qw($opt_c $opt_f $opt_u $opt_w
+            $free_memory $used_memory $total_memory
+            $crit_level $warn_level
+            %exit_codes @memlist
+            $percent $fmt_pct 
+            $verb_err $command_line);
+
+# Predefined exit codes for Nagios
+%exit_codes   = ('UNKNOWN' ,-1,
+                 'OK'      , 0,
+                 'WARNING' , 1,
+                 'CRITICAL', 2,);
+
+# Turn this to 1 to see reason for parameter errors (if any)
+$verb_err     = 0;
+
+# This the unix command string that brings Perl the data
+$command_line = `vmstat | tail -1 | awk '{print \$4,\$5}'`;
+
+chomp $command_line;
+@memlist      = split(/ /, $command_line);
+
+# Define the calculating scalars
+$used_memory  = $memlist[0];
+$free_memory  = $memlist[1];
+$total_memory = $used_memory + $free_memory;
+
+# Get the options
+if ($#ARGV le 0)
+{
+  &usage;
+}
+else
+{
+  getopts('c:fuw:');
+}
+
+# Shortcircuit the switches
+if (!$opt_w or $opt_w == 0 or !$opt_c or $opt_c == 0)
+{
+  print "*** You must define WARN and CRITICAL levels!" if ($verb_err);
+  &usage;
+}
+elsif (!$opt_f and !$opt_u)
+{
+  print "*** You must select to monitor either USED or FREE memory!" if ($verb_err);
+  &usage;
+}
+
+# Check if levels are sane
+if ($opt_w <= $opt_c and $opt_f)
+{
+  print "*** WARN level must not be less than CRITICAL when checking FREE memory!" if ($verb_err);
+  &usage;
+}
+elsif ($opt_w >= $opt_c and $opt_u)
+{
+  print "*** WARN level must not be greater than CRITICAL when checking USED memory!" if ($verb_err);
+  &usage;
+}
+
+$warn_level   = $opt_w;
+$crit_level   = $opt_c;
+
+if ($opt_f)
+{
+  $percent    = $free_memory / $total_memory * 100;
+  $fmt_pct    = sprintf "%.1f", $percent;
+  if ($percent <= $crit_level)
+  {
+    print "Memory CRITICAL - $fmt_pct% ($free_memory kB) free\n";
+    exit $exit_codes{'CRITICAL'};
+  }
+  elsif ($percent <= $warn_level)
+  {
+    print "Memory WARNING - $fmt_pct% ($free_memory kB) free\n";
+    exit $exit_codes{'WARNING'};
+  }
+  else
+  {
+    print "Memory OK - $fmt_pct% ($free_memory kB) free\n";
+    exit $exit_codes{'OK'};
+  }
+}
+elsif ($opt_u)
+{
+  $percent    = $used_memory / $total_memory * 100;
+  $fmt_pct    = sprintf "%.1f", $percent;
+  if ($percent >= $crit_level)
+  {
+    print "Memory CRITICAL - $fmt_pct% ($used_memory kB) used\n";
+    exit $exit_codes{'CRITICAL'};
+  }
+  elsif ($percent >= $warn_level)
+  {
+    print "Memory WARNING - $fmt_pct% ($used_memory kB) used\n";
+    exit $exit_codes{'WARNING'};
+  }
+  else
+  {
+    print "Memory OK - $fmt_pct% ($used_memory kB) used\n";
+    exit $exit_codes{'OK'};
+  }
+}
+
+# Show usage
+sub usage()
+{
+  print "\ncheck_mem.pl v1.0 - Nagios Plugin\n\n";
+  print "usage:\n";
+  print " check_mem.pl -<f|u> -w <warnlevel> -c <critlevel>\n\n";
+  print "options:\n";
+  print " -f           Check FREE memory\n";
+  print " -u           Check USED memory\n";
+  print " -w PERCENT   Percent free/used when to warn\n";
+  print " -c PERCENT   Percent free/used when critical\n";
+  print "\nCopyright (C) 2000 Dan Larsson <dl\@tyfon.net>\n";
+  print "check_mem.pl comes with absolutely NO WARRANTY either implied or explicit\n";
+  print "This program is licensed under the terms of the\n";
+  print "GNU General Public License (check source code for details)\n";
+  exit $exit_codes{'UNKNOWN'}; 
+}