#!/bin/sh

# MemUsage v0.1
#
# Written by d1s4st3r
# http://xoomer.alice.it/mental_insomnia/
# http://d1s4st3r.blogspot.com/
# http://d1s4st3r.deviantart.com/


drawChart()
{
	COUNT=0
	MAX=30
	CHARTWIDTH=`expr $MAX - 2`
	CHARTUSED=`expr $2 '*' $MAX / $1`
	CHARTFREE=`expr $CHARTWIDTH - $CHARTUSED`

	echo -n "["
	while [ $COUNT -lt $MAX ] ;
	do
		if [ $COUNT -lt $CHARTUSED ]; then
			echo -n "#"
		else
			echo -n "."
		fi
		COUNT=`expr $COUNT + 1`
	done
	echo "] ($3% occupied)"
}


RAM=`free -m | grep Mem`
SWAP=`free -m | grep Swap`

RAMTOTAL=`echo $RAM | awk '{ print $2 }'`
RAMUSED=`echo $RAM | awk '{ print $3 }'`

SWAPTOTAL=`echo $SWAP | awk '{ print $2 }'`
SWAPUSED=`echo $SWAP | awk '{ print $3 }'`

RAMPERCENT=`expr 100 '*' $RAMUSED '/' $RAMTOTAL`
SWAPPERCENT=`expr 100 '*' $SWAPUSED '/' $SWAPTOTAL`


echo "RAM (total: $RAMTOTAL MB; used: $RAMUSED MB)"
drawChart $RAMTOTAL $RAMUSED $RAMPERCENT

echo

echo "SWAP (total: $SWAPTOTAL MB; used: $SWAPUSED MB)"
drawChart $SWAPTOTAL $SWAPUSED $SWAPPERCENT