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52 daniel-mar 1 
<?php /* <ViaThinkSoftSignature>
53 daniel-mar 2 
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52 daniel-mar 23 
w==
24 
</ViaThinkSoftSignature> */ ?>
25 
<?php
26 
 
27 
/*
28 
 * VNag - Nagios Framework for PHP
29 
 * Developed by Daniel Marschall, ViaThinkSoft <www.viathinksoft.com>
30 
 * Licensed under the terms of the Apache 2.0 license
31 
 *
32 
 * Revision 2022-06-06
33 
 */
34 
 
35 
declare(ticks=1);
36 
 
37 
define('OUTPUT_UOM', 'MB');
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define('ROUND_TO', 0);
39 
 
40 
class OpenDeletedFilesCheck extends VNag {
41 
        protected $argDir = null;
42 
 
43 
        public function __construct() {
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                parent::__construct();
45 
 
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                $this->registerExpectedStandardArguments('Vhtwc');
47 
 
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                $this->getHelpManager()->setPluginName('open_deleted_files');
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                $this->getHelpManager()->setVersion('1.0');
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                $this->getHelpManager()->setShortDescription('This plugin checks for open deleted files (which require space but are not visible/accessible anymore).');
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                $this->getHelpManager()->setCopyright('Copyright (C) 2011-$CURYEAR$ Daniel Marschall, ViaThinkSoft.');
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                $this->getHelpManager()->setSyntax('$SCRIPTNAME$ [-d directory] [-w warnSizeKB] [-c critSizeKB]');
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                $this->getHelpManager()->setFootNotes('If you encounter bugs, please contact ViaThinkSoft at www.viathinksoft.com');
54 
 
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#               $this->warningSingleValueRangeBehaviors[0]  = self::SINGLEVALUE_RANGE_VAL_GT_X_BAD;
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#               $this->criticalSingleValueRangeBehaviors[0] = self::SINGLEVALUE_RANGE_VAL_GT_X_BAD;
57 
 
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                // Individual (non-standard) arguments:
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                $this->addExpectedArgument($this->argDir = new VNagArgument('d', 'directory', VNagArgument::VALUE_REQUIRED, 'directory', 'Directory to check (e.g. /tmp)Directory to check (e.g. /tmp)'));
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        }
61 
 
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        protected static function check_open_deleted_files($dir_to_check = '/') {
53 daniel-mar 63 
                // Note: Requires root
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                exec('lsof -n', $lines, $ec);
52 daniel-mar 65 
                if ($ec != 0) return false;
66 
 
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                /*
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                $lines = explode("\n",
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                'COMMAND     PID   TID TASKCMD               USER   FD      TYPE             DEVICE    SIZE/OFF       NODE NAME
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                php-cgi     430                          oidplus    3u      REG               0,42           0 1502217042 /tmp/.ZendSem.uhCRtC (deleted)
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                apache2     838                             root  150u      REG               0,42           0 1499023202 /tmp/.ZendSem.RFcTM9 (deleted)
72 
                postgres   1060                      gitlab-psql  txt       REG                9,0     9291488   47189384 /opt/gitlab/embedded/postgresql/12/bin/postgres (deleted)
73 
                php-cgi    1573                         owncloud    3u      REG               0,42           0 1499024339 /tmp/.ZendSem.2Qh70x (deleted)
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                php-fpm7.  1738                             root    3u      REG               0,42           0  434907183 /tmp/.ZendSem.unGJqF
75 
                php-fpm7.  1739                         www-data    3u      REG               0,42           0  434907183 /tmp/.ZendSem.unGJqF (deleted)
76 
                php-fpm7.  1740                         www-data    3u      REG               0,42           0  434907183 /tmp/.ZendSem.unGJqF (deleted)
77 
                runsvdir   1932                             root  txt       REG                9,0       27104   45351338 /opt/gitlab/embedded/bin/runsvdir (deleted)
78 
                ');
79 
                */
80 
 
81 
                $line_desc = array_shift($lines);
82 
                $p_name = strpos($line_desc, 'NAME');
83 
                if ($p_name === false) return false;
84 
 
85 
                $nodes = array();
86 
 
87 
                foreach ($lines as $line) {
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                        if (trim($line) == '') continue;
89 
 
90 
                        $name = substr($line, $p_name);
91 
 
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                        preg_match('@.+\s(\d+)\$@ism', substr($line, 0, $p_name-1), $m);
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                        $tmp = rtrim(substr($line, 0, $p_name-1));
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                        $tmp = explode(" ", $tmp);
95 
                        $node = end($tmp);
96 
 
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                        $tmp = rtrim(substr($line, 0, $p_name-strlen($node)-1));
98 
                        $tmp = explode(" ", $tmp);
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                        $size = end($tmp);
100 
 
101 
                        if (substr($name, 0, strlen($dir_to_check)) !== $dir_to_check) continue;
102 
 
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                        if (strpos($name, ' (deleted)') === false) continue;
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                        if ($size == 0) continue;
105 
 
106 
                        $nodes[$node] = $size;
107 
                }
108 
 
109 
                $size_total = 0;
110 
                foreach ($nodes as $node => $size) {
111 
                        $size_total += $size;
112 
                }
113 
                return $size_total;
114 
        }
115 
 
116 
        protected function cbRun($optional_args=array()) {
117 
                $dir = $this->argDir->getValue();
118 
                if (empty($dir)) $dir = '/';
119 
                $dir = realpath($dir) === false ? $dir : realpath($dir);
120 
                if (substr($dir,-1) !== '/') $dir .= '/';
121 
 
122 
                $size = self::check_open_deleted_files($dir);
123 
                if ($size === false) throw new Exception("Cannot get information from 'lsof'");
124 
 
125 
                $this->checkAgainstWarningRange( array($size.'B'), false, true, 0);
126 
                $this->checkAgainstCriticalRange(array($size.'B'), false, true, 0);
127 
 
128 
                $m = (new VNagValueUomPair($size.'B'));
129 
                $m->roundTo = ROUND_TO;
130 
                $sizeOut = $m->normalize(OUTPUT_UOM);
131 
 
132 
                $msg = "$sizeOut opened deleted files in $dir";
133 
                $this->setHeadline($msg);
134 
        }
135 
}