#!/bin/sh
#
# Plugin to monitor CPU usage, for a selected set of users
#
# Usage: Place in /etc/munin/node.d/ (or link it there  using ln -s)
#        Add this to your /etc/munin/plugin-conf.d/munin-node:
#		[cpubyuser]
#		env.USERS root yann
#
#	 root and yann being a list of the users to monitor.
#	 You need to also make sure that awk is installed

#
# Parameters understood:
#
#       config   (required)
#       autoconf (optional - used by munin-config)
#

#%# family=auto
#%# capabilities=autoconf



if [ "$1" = "autoconf" ] ; then 
	if [ -n "$USERS" ] ; then
  		echo "yes"
	else
		echo "\$USERS not defined."
	fi
	exit
fi

if [ "$1" = "config" ] ; then
	echo "graph_args --base 1000 -r --lower-limit 0";
	echo "graph_title CPU usage, by user";
	echo "graph_category system";
	echo "graph_info This graph shows CPU usage, for monitored users.";
        echo 'graph_vlabel %'
        echo 'graph_scale no'
        echo 'graph_period second'

	echo "graph_order $USERS"
	
	FIRSTUSER=1;
	for USER in $USERS; do	
		echo "${USER}.label $USER"
		echo "${USER}.info CPU used by user $USER"
		echo "${USER}.type GAUGE"
		if [ $FIRSTUSER -eq 1 ] ; then
			echo "${USER}.draw AREA"
			export FIRSTUSER=0;
		else	
			echo "${USER}.draw STACK"
		fi
	done ;
	
	exit
fi



for USER in $USERS ; do {

	ps -u $USER -o "%C" |
	awk '
	BEGIN {
		FS=" "
		CPU_USER=0
	}

	{
		CPU_USER+=$0
	}

	END { 
	print  "'$USER'.value "CPU_USER
	}'  
}

done;