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#!/usr/bin/env bash
#
# Status bar for dwm. Adapted from:
# https://github.com/w0ng/bin/blob/master/dwm-statusbar
# Colour codes from dwm/config.h
colour_faded="\x01" # grey on black
colour_neutral="\x02" # blue on black
colour_warning="\x03" # yellow on black
colour_critical="\x04" # red on black
colour_normal="\x05" # grey on black
# Icon glyphs from font xbmicons.pcf
space=" "
print_date() {
echo -ne "${colour_normal}$(date "+%d/%m/%y")"
}
print_time() {
time_local="$(date "+%H:%M")"
time_us="$(TZ='US/Central' date "+%H:%M")"
echo -ne "${colour_neutral}\uE3D2${colour_normal}${time_local}${colour_faded}${time_us}"
}
print_volume() {
# empty E022, low E023, full E024, mid E03B
volume=$(amixer get Master | tail -n1 | sed -r 's/.*\[(.*)%\].*/\1/')
mute="$(amixer get Master | tail -n1 | sed -r 's/.*\[(on|off)\].*/\1/')"
if [ "$mute" == "off" ]; then
vol_colour=$colour_warning
icon_colour=$colour_warning
icon="\uE022"
else
vol_colour=$colour_normal
icon_colour=$colour_neutral
if [ $volume -eq 0 ]; then
icon="\uE022"
elif [ $volume -lt 33 ]; then
icon="\uE023"
elif [ $volume -lt 66 ]; then
icon="\uE03B"
else
icon="\uE024"
fi
fi
echo -ne "${icon_colour}${icon}${vol_colour}${volume}%"
}
print_sda1_free() {
# floppy E0C3
sda1_free=$(df -kh / | awk 'NR==2 {print $4}')
sda1_percent=$(df -kh / | awk 'NR==2 {print $5}' | sed 's/%//g')
if [ $sda1_percent -gt 90 ]; then
icon_colour=$colour_critical
sda1_colour=$colour_critical
elif [ $sda1_percent -gt 75 ]; then
icon_colour=$colour_warning
sda1_colour=$colour_warning
else
icon_colour=$colour_neutral
sda1_colour=$colour_normal
fi
echo -ne "${icon_colour}\uE0C3${sda1_colour}${sda1_free}"
}
print_mem_free() {
mem_free="$(free -m | awk 'NR==2 {print $7}')"
mem_colour=$colour_normal
icon_colour=$colour_neutral
if [ $mem_free -lt 250 ]; then
mem_colour=$colour_critical
icon_colour=$colour_critical
elif [ $mem_free -lt 500 ]; then
mem_colour=$colour_warning
icon_colour=$colour_warning
fi
echo -ne "${icon_colour}\uE28B${mem_colour}${mem_free}M"
}
print_cpu_temp() {
cpu_temp=$(sensors -u | awk '/Core 0/ {getline; print $2}' | sed -r 's/([0-9]*)\.[0-9]*/\1/')
temp_colour=$colour_normal
icon_colour=$colour_neutral
if [ $cpu_temp -gt 83 ]; then
temp_colour=$colour_critical
icon_colour=$colour_critical
elif [ $cpu_temp -gt 99 ]; then
temp_colour=$colour_warning
icon_colour=$colour_warning
fi
echo -ne "${icon_colour}\uE3B2${temp_colour}${cpu_temp}°"
}
# cpu (from: https://bbs.archlinux.org/viewtopic.php?pid=661641#p661641)
print_cpu_used() {
echo -ne "${colour_neutral}\uE3AF${colour_normal}${cpu_used}%"
}
print_eth() {
eth_status=$(ip addr show dev enp4s0 | awk 'NR==1 {print $9}')
if [ "$eth_status" == "UP" ]; then
eth_ip=$(ip addr show dev enp4s0 | awk 'NR==3 {print $2}' | sed -r 's/\/.*//')
icon_colour=${colour_neutral}
eth_colour=${colour_normal}
else
icon_colour=${colour_faded}
fi
echo -ne "${icon_colour}\uE0E4${eth_colour}${eth_ip}"
}
while true; do
# get new cpu idle and total usage
eval $(awk '/^cpu /{print "cpu_idle_now=" $5 "; cpu_total_now=" $2+$3+$4+$5 }' /proc/stat)
cpu_interval=$((cpu_total_now-${cpu_total_old:-0}))
# calculate cpu usage (%)
let cpu_used="100 * ($cpu_interval - ($cpu_idle_now-${cpu_idle_old:-0})) / $cpu_interval"
# Pipe to status bar
xsetroot -name "$(print_eth)${space}$(print_sda1_free)${space}$(print_cpu_used)${space}$(print_cpu_temp)${space}$(print_mem_free)${space}$(print_volume)${space}$(print_time)$(print_date)"
# reset old rate
cpu_idle_old=$cpu_idle_now
cpu_total_old=$cpu_total_now
# loop stats every 1 second
sleep 1
done
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