#!/usr/bin/awk -f
function getvar(label) {
	while (getline < meminfo && $1 != label":");
	return $2
}

BEGIN {
	meminfo="/proc/meminfo"

	# Make sure these are in order of the output of /proc/meminfo
	memtotal	= getvar("MemTotal")
	memfree		= getvar("MemFree")
	buffers		= getvar("Buffers")
	cached		= getvar("Cached")
	shmem		= getvar("Shmem")
	sreclaimable	= getvar("SReclaimable")

	# Htop calculations
	totalused	= memtotal - memfree
	totalcached	= cached + sreclaimable - shmem
	noncachenonbuf	= totalused - (buffers + totalcached)

	# Print % of memory used
	print int((noncachenonbuf * 100) / memtotal)"%"
}

#BEGIN {
#	cmd="free -b"
#	cmd | getline
#	cmd | getline
#	print int($3*100/$2)"%"
#}
##awk '{ if(!total){ total = $2 } else if(!free){ free = $2 } else{ exit } } END{ print int(((total-free)*100)/total)"%" }' /proc/meminfo