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#!/bin/bash
# Screenshot: http://s.natalian.org/2013-08-17/dwm_status.png
# Network speed stuff stolen from http://linuxclues.blogspot.sg/2009/11/shell-script-show-network-speed.html
separator="|"
# This function parses /proc/net/dev file searching for a line containing $interface data.
# Within that line, the first and ninth numbers after ':' are respectively the received and transmited bytes.
function get_bytes {
# Find active network interface
interface=$(ip route get 8.8.8.8 2>/dev/null| awk '{print $5}')
line=$(grep $interface /proc/net/dev | cut -d ':' -f 2 | awk '{print "received_bytes="$1, "transmitted_bytes="$9}')
eval $line
now=$(date +%s%N)
}
# Function which calculates the speed using actual and old byte number.
# Speed is shown in KByte per second when greater or equal than 1 KByte per second.
# This function should be called each second.
function get_velocity {
value=$1
old_value=$2
now=$3
timediff=$(($now - $old_time))
velKB=$(echo "1000000000*($value-$old_value)/1024/$timediff" | bc)
if test "$velKB" -gt 1024
then
echo $(echo "scale=2; $velKB/1024" | bc)MB/s
else
echo ${velKB}KB/s
fi
}
# Get initial values
get_bytes
old_received_bytes=$received_bytes
old_transmitted_bytes=$transmitted_bytes
old_time=$now
print_volume() {
volume="$(amixer get Master | tail -n1 | sed -r 's/.*\[(.*)%\].*/\1/')"
if test "$volume" -gt 0
then
echo -e "\uE05D${volume}"
else
echo -e "Mute"
fi
}
print_wifi() {
ip=$(ip route get 8.8.8.8 2>/dev/null|grep -Eo 'src [0-9.]+'|grep -Eo '[0-9.]+')
if=wlan0
while IFS=$': \t' read -r label value
do
case $label in SSID) SSID=$value
;;
signal) SIGNAL=$value
;;
esac
done < <(iw "$if" link)
echo -e "$SSID $SIGNAL $ip"
}
print_mem(){
memfree=$(($(grep -m1 'MemAvailable:' /proc/meminfo | awk '{print $2}') / 1024))
echo -e "$memfree"
}
print_temp(){
test -f /sys/class/thermal/thermal_zone0/temp || return 0
echo $(head -c 2 /sys/class/thermal/thermal_zone0/temp)C
}
print_bat(){
hash acpi || return 0
onl="$(grep "on-line" <(acpi -V))"
charge="$(awk '{ sum += $1 } END { print sum }' /sys/class/power_supply/BAT*/capacity)"
if test -z "$onl"
then
# suspend when we close the lid
#systemctl --user stop inhibit-lid-sleep-on-battery.service
echo -e "${charge}"
else
# On mains! no need to suspend
#systemctl --user start inhibit-lid-sleep-on-battery.service
echo -e "${charge}"
fi
}
print_date(){
date "+%a %m-%d %T%:::z"
}
show_record(){
test -f /tmp/r2d2 || return
rp=$(cat /tmp/r2d2 | awk '{print $2}')
size=$(du -h $rp | awk '{print $1}')
echo " $size $(basename $rp)"
}
while true
do
# Get new transmitted, received byte number values and current time
get_bytes
# Calculates speeds
vel_recv=$(get_velocity $received_bytes $old_received_bytes $now)
vel_trans=$(get_velocity $transmitted_bytes $old_transmitted_bytes $now)
xsetroot -name "$(print_mem) $separator $(vel_recv) $separator $(vel_trans) $separator $(print_temp) $separator $(print_wifi) $separator $(print_bat) $separator $(show_record) $separator $(print_date)"
# Update old values to perform new calculations
old_received_bytes=$received_bytes
old_transmitted_bytes=$transmitted_bytes
old_time=$now
sleep 1
done
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