S.M.A.R.T check for Zabbix

smart.php

<?php
/**
    SMARTで異常があるかどうか調べる。
    ( This script checks S.M.A.R.T for Zabbix. )

    === Setting ===
    [zabbix_agentd.conf]
    + UserParameter=hdd.smart[*],/usr/bin/php /path/to/smart.php $1 $2 $3
    + AllowRoot=1

    === $1 - mode = 0 or 1 ===
    [mode = 0]
    １つの要素の値だけが欲しい場合
    ( If you want one value. )

    = Example =
    hdd.smart[0,sda,Temp]
    Output : 44

    [mode = 1]
    HDDに異常があるかどうかだけを知りたい場合
    ( If you want to check all value. )

    出力が
    ( Output is
    0 = 正常 ( check ok )
    1 = 異常 ( unusual )

    = Example =
    hdd.smart[1,sda]
    Output : 0

    サーバー側で
    (Test your zabbix server )

    zabbix_get -s <agent ip> -k hdd.smart[0,sda,Temp]
    or
    zabbix_get -s <agent ip> -k hdd.smart[1,sda]

    を投げて数値が返ってきたら正常に動作しています。
    ( If you can get outputs, this script is working. )

    見てる項目は Reallocated_Event_Count, Current_Pending_Sector
    どれか１つでも | Worst or Value > Threshold | となっていれば異常と判断
    ( This plugin see 'Reallocated_Event_Count, Current_Pending_Sector'.
      Worst or Value > Threshold is ununsual. )

    https://luispc.com/
 */
error_reporting(0);

/* Mode */
$mode = $argv[1];
/* Device */
$dev = $argv[2];
/* item */
$item = $argv[3];

if ($mode == 0) {
    $exec = exec("smartctl -A /dev/{$dev} | grep '{$item}' | awk '{print $10}'");
    echo $exec;
    exit;

} elseif ($mode == 1) {
    /* Reallocated Sectors Count */
    $RSC_value = exec("smartctl -A /dev/{$dev} | grep 'Reallocated_Sector_Ct' | awk '{print $4}'");
    $RSC_worst = exec("smartctl -A /dev/{$dev} | grep 'Reallocated_Sector_Ct' | awk '{print $5}'");
    $RSC_thres = exec("smartctl -A /dev/{$dev} | grep 'Reallocated_Sector_Ct' | awk '{print $6}'");

    /* Current Pending Sector Count */
    $CPSC_value = exec("smartctl -A /dev/{$dev} | grep 'Current_Pending_Sector' | awk '{print $4}'");
    $CPSC_worst = exec("smartctl -A /dev/{$dev} | grep 'Current_Pending_Sector' | awk '{print $5}'");
    $CPSC_thres = exec("smartctl -A /dev/{$dev} | grep 'Current_Pending_Sector' | awk '{print $6}'");

    if ($RSC_thres >= $RSC_value || $RSC_thres >= $RSC_worst
        || $CPSC_thres >= $CPSC_value || $CPSC_thres >= $CPSC_worst
    ) {
        echo '-1';

    } else {
        echo '0';
    }
}