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#!/bin/bash
# ======================================================================
#
# Icinga/ Nagios Check
# ABOUT
#
# ----------------------------------------------------------------------
# 2023-10-23  v1.0  <axel.hahn@unibe.ch>      initial version
# 2023-10-25  v1.1  <axel.hahn@unibe.ch>      show disks, show installed versions (WIP)
# 2023-12-22  v1.2  <axel.hahn@unibe.ch>      show help
# 2025-02-10  v1.3  <axel.hahn@unibe.ch>      harden sourcing files
# ======================================================================

# shellcheck source=/dev/null
. "$( dirname "$0" )/inc_pluginfunctions" || exit 1

export self_APPVERSION=1.3

. /etc/icingaclient/client.cfg 2>/dev/null

# show versions of these tools. 
# number 2 or 3 stands for position of version in the output 
# tools2="curl restic php python"
# tools3="rsync"

# ----------------------------------------------------------------------
# FUNCTIONS
# ----------------------------------------------------------------------

# show help text
function showHelp(){
    local _self; _self=$(basename $0)
cat <<EOF
$( ph.showImlHelpHeader )

About ... shows a short summary for the system:

  * operating system
  * cpu
  * ram
  * diskspace
  * checked services

SYNTAX:

  $_self [-h]

OPTIONS:

  -h, --help 
      this help

EOF
}

function _section(){
    echo ">>>>>>>>>> $*"
}

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

# --- check param -h

while [[ "$#" -gt 0 ]]; do case $1 in
    -h|--help)      showHelp; exit 0;;
    *) echo "ERROR: Unknown parameter: $1"; showHelp; exit 1;
esac; done

_iCpu=$( grep -c "processor" /proc/cpuinfo )
_sCpuModel=$(grep "model name" /proc/cpuinfo | sort -u )
_iMem=$( grep "MemTotal:"   /proc/meminfo | awk '{ print $2 }' )
_sMem=$( grep "MemTotal:"   /proc/meminfo | awk '{ print $2 " " $3}' )
_sSwap=$( grep "SwapTotal:" /proc/meminfo | awk '{ print $2 " " $3}' )

# ----- status line
echo -n $( ph.getOS; ph.getOSMajor )
echo -n " / ${_iCpu} cpu"
echo -n " / $(ph.toUnit "${_iMem}K" "G" 3) GB ram"
echo
echo

# ----- body text

_section "CPU: $_iCpu"
echo "${_sCpuModel}"
echo

_section "Memory"
echo "RAM total    ${_sMem}"
echo "Swap         ${_sSwap}"
echo

_section "Disks"
out=$(df -h )
echo "$out" | head -1
for mydev in $( echo "$out" | grep "^/" | cut -f 1 -d " " | sort -u )
do
    echo "$out" | grep "^$mydev" | head -1
done
echo

if [ -d "${dir_checks}" ]; then
    _section "Services"
    cd "${dir_checks}"
    ls -1 Service-* | cut -f 2- -d "-"
    cd - >/dev/null 2>&1
    echo
fi

# hmmmm - too complicated...
# _section "Tools"
# (
#     for mytool in $tools2
#     do
#         (
#         $mytool --version 2>/dev/null \
#             || $mytool version 2>/dev/null
#         ) | head -1 | awk '{ print $1 " " $2 }'
#     done
#     for mytool in $tools3
#     do
#         (
#         $mytool --version 2>/dev/null \
#             || $mytool version 2>/dev/null
#         ) | head -1 | awk '{ print $1 " " $3 }'
#     done
# ) | sort 
# echo

# _section "network"
# ip -o a
# echo
# cat /etc/resolv.conf | grep "^[a-z0-9]"

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