working on a script asked by @kuraku on [arch forums](https://bbs.archlinux.org/viewtopic.php?pid=1213820#p1213820)

sys_monitor

#!/usr/bin/env bash

# Status script
# original: https://bitbucket.org/jasonwryan/eeepc/src/fefeccd4b280/Scripts/dwm-status
# colours: 01:normal 02:green 03:orange 04:red 05:gray 06:blue

## sleep interval - delay between updates
declare -r interval=3

## color definitions
if [[ "$1" == 'dwm' ]]
then # use dwm status color codes
	declare -r -A colors=(
	[normal]="\x01"
	[green]="\x02"
	[orange]="\x03"
	[red]="\x04"
	[gray]="\x05"
	[blue]="\x06"
	)
else # use bar status colors codes
	declare -r -A colors=(
	[normal]="\f1"
	[green]="\f2"
	[orange]="\f3"
	[red]="\f4"
	[gray]="\f5"
	[blue]="\f6"
	)
fi

keyboard_indicator() {
	awk -vn="${colors[normal]}" -vg="${colors[green]}" '
	BEGIN { l = n"??" }
	$1 == "layout:" { l = $2; exit }
	END { printf(" %s%s%s", g, l, n) }' < <(setxkbmap -query)
}

# FIXME .. no battery here - no acpi command ..
#battery_status() {
#  ac="$(awk '{ gsub(/%|%,/, "");} NR==1 {print $4}' <(acpi -V))"
#  on="$(grep "on-line" <(acpi -V))"
#  if [ -z "$on" ] && [ "$ac" -gt "15" ]; then
#    echo -e "\uE04F \x02$ac%\x05 |\x01"
#  elif [ -z "$on" ] && [ "$ac" -le "15" ]; then
#    echo -e "\uE04F \x05n/a\x05 |\x01"
#  else
#    echo -e "\uE023 \x02$ac%\x05 |\x01"
#  fi
#}

free_mem() {
	awk -vn="\\${colors[normal]}" -vg="\\${colors[green]}" -vb="\\${colors[blue]}" '
	$1 == "-/+" { if($3 > $4) c = g; else c = b; exit }
	END { printf(" %s%s%s MB%s", c, $3, b, n) }' < <(free -m)
}

cpu_usage() {
	read _ a1 b1 c1 idle1 _ < /proc/stat
	sleep 0.5
	read _ a2 b2 c2 idle2 _ < /proc/stat

	if ((
		total1 = a1 + b1 + c1 + idle1,
		total2 = a2 + b2 + c2 + idle2,
		tdiff  = total2 - total1,
		cpu_usage = 100 * (tdiff - (idle2 - idle1)) / tdiff,
		cpu_usage > 50
	))
	then printf '%b %s%s%%%s' "\uE031" "${colors[blue]}"   "$cpu_usage" "${colors[normal]}"
	else printf '%b %s%s%%%s' "\uE031" "${colors[normal]}" "$cpu_usage" "${colors[normal]}"
	fi
}

cpu_speed() {
	awk -vn="\\${colors[normal]}" -vg="\\${colors[gray]}" '
	$1$2 == "cpuMHz" { printf("%s%s%s ", n, $4, n) }' /proc/cpuinfo
}

hdd_space() {
	awk -vn="\\${colors[normal]}" '
	index($1, "/dev/") { s = s$5" " }
	END{ printf(" %s%s", s, n) }' < <(df -P | sort -d)
}

net_speed () {
	awk -vn="\\${colors[normal]}" -vb="\\${colors[blue]}" -vg="\\${colors[green]}" '
	$1$2 == "RXpackets" { rx = $5 } $1$2 == "TXpackets" { tx = $5 }
	END { printf(" %s%s%s  %s%s%s", g, rx, n, b, tx, n) }' < <(ifconfig eth0)
}

time_and_date() {
	date "+ ${colors[red]}%H:%M %d%m%Y${colors[normal]}"
}

temperature() {
	awk -vn="\\${colors[normal]}" -vg="\\${colors[green]}" '
	$1 == "temp1:" { cpu = $2 }
	$1 == "temp2:" {  mb = $2 }
	END { printf(" %s%s %s%s", g, cpu, mb, n) }' < <(sensors)
}

sep() {
	printf '%s | %s' "${colors[gray]}" "${colors[normal]}"
}

## ommited: battery_status keyboard_indicator
output() {
	net_speed
	sep
	cpu_usage
	sep
	cpu_speed
	sep
	temperature
	sep
	free_mem
	sep
	hdd_space
	sep
	time_and_date
}

# run this thing :)
while true
do
	if [[ "$1" == 'dwm' ]]
	then xsetroot -name "$(output)"
	else printf '%s%s%s\n' "\r\fr\br\ur" "$(output)" "\fr\br\ur"
	fi
	sleep "$interval"
done

need to find the equivalent of shell's printf '%b\n' "\uXXXX" for awk