#!/bin/sh
#
# Simple Bourne Shell script that implements Munin protocoll and 
# some common Linux plugins.
#
# For latest version, see http://muninlite.sf.net/
#
# Copyright (c) 2007 Rune Nordbøe Skillingstad <rune@skillingstad.no>
# 
# Licensed under GPLv2 (see LICENSE file for full License)
#
# $Id: $
#

VERSION="@@VERSION@@"

# Remove unwanted plugins from this list
PLUGINS="@@PLUGINS@@"

# ===== PLUGINS CODE =====
@@PLSTR@@

# ===== NODE CODE =====
do_list() {
  echo $PLUGINS
}


do_nodes() {
  echo "$HOSTNAME"
  echo "."
}

do_config() {
  if echo "$PLUGINS" | grep "\b$1\b" >/dev/null 2>&1; then
    config_$1
  else
    echo "# Unknown service"
  fi
  echo "."
}

do_fetch() {
  if echo "$PLUGINS" | grep "\b$1\b" >/dev/null 2>&1; then
    fetch_$1
  else
    echo "# Unknown service"
  fi
  echo "."
}

do_version() {
  echo "munins node on $HOSTNAME version: $VERSION (munin-lite)"
}

do_quit() {
  exit 0
}

# ===== Runtime config =====
RES=""
for PLUG in $PLUGINS
do 
  if [ "$PLUG" = "if_" ]; then  
    for INTER in $(grep '^ *\(eth\|wlan\|ath\|ra\)[0-9]\{1,\}:' /proc/net/dev | cut -f1 -d: | sed 's/ //g');
    do
      RES="$RES if_$INTER"
      eval "fetch_if_${INTER}() { fetch_if $INTER $@; };"
      eval "config_if_${INTER}() { config_if $INTER $@; };"
    done
  elif [ "$PLUG" = "if_err_" ]; then
    for INTER in $(grep '^ *\(eth\|wlan\|ath\|ra\)[0-9]\{1,\}:' /proc/net/dev | cut -f1 -d: | sed 's/ //g');
    do
      RES="$RES if_err_$INTER"
      eval "fetch_if_err_${INTER}() { fetch_if_err $INTER $@; };"
      eval "config_if_err_${INTER}() { config_if_err $INTER $@; };"
    done
  elif [ "$PLUG" = "netstat" ]; then
    if netstat -s >/dev/null 2>&1; then
      RES="$RES netstat"
    fi
  else
    RES="$RES $PLUG";
  fi
done
PLUGINS=$RES

# ===== MAIN LOOP =====
FUNCTIONS="list nodes config fetch version quit"
HOSTNAME=$(hostname -f 2>/dev/null || hostname)
echo "# munin node at $HOSTNAME"
while read arg0 arg1 
do 
  arg0=$(echo "$arg0" | xargs)
  arg1=$(echo "$arg1" | xargs)  
  if ! echo "$FUNCTIONS" | grep "\b$arg0\b" >/dev/null 2>&1 ; then
    echo "# Unknown command. Try" $(echo "$FUNCTIONS" | sed -e 's/\( [[:alpha:]]\{1,\}\)/,\1/g' -e 's/,\( [[:alpha:]]\{1,\}\)$/ or\1/')
    continue
  fi
  
  do_$arg0 $arg1
done