#!/bin/bash
# ======================================================================
#
# Check for zombie processes
#
# requirements:
# - top
#
# ----------------------------------------------------------------------
# 2020-03-10  v1.0  <axel.hahn@iml.unibe.ch>
# 2020-07-08  v1.1  <axel.hahn@iml.unibe.ch> FIX: set "ph." instead "ps."
# ======================================================================


. `dirname $0`/inc_pluginfunctions
tmpfile=/tmp/check_proc_zombie_$$

# ----------------------------------------------------------------------
# MAIN
# ----------------------------------------------------------------------

# --- check required tools
ph.require top

# --- check param -h
if [ "$1" = "-h" ]; then
    echo "
    usage: $0 [ -w value -c value -h ]

        -w  Warning level
        -c  Critical level
        -h  this help
    "
    exit 0
fi

# set default / override from command line params
typeset -i iWarnLimit=`     ph.getValueWithParam 1  w "$@"`
typeset -i iCriticalLimit=` ph.getValueWithParam 10 c "$@"`

# get cpu status i.e.
# %Cpu(s): 33.3 us,  9.5 sy,  0.0 ni, 57.1 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
top -b -n 1 | head -5 | grep "^Tasks:" >$tmpfile

iProcTotal=`   awk '{ print $2  }' $tmpfile`
iProcRunning=` awk '{ print $4  }' $tmpfile`
iProcSleeping=`awk '{ print $6  }' $tmpfile`
iProcStopped=` awk '{ print $8  }' $tmpfile`
iProcZombie=`  awk '{ print $10 }' $tmpfile`

rm -f $tmpfile

ph.setStatusByLimit ${iProcZombie} ${iWarnLimit} ${iCriticalLimit}

# --- status output
ph.status "${iProcZombie} ZOMBIE-Processes (total: ${iProcTotal} - running: ${iProcRunning} - sleeping: ${iProcSleeping} - stopped: ${iProcStopped})"
ps -efl | grep -i "^[0-9]* Z"

# --- performance data usage
ph.perfadd "proc-zombie"  "${iProcZombie}" $iWarnLimit $iCriticalLimit 0

# --- Bye
ph.exit

# ----------------------------------------------------------------------