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dotfiles/.local/bin/dwmbar

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#!/bin/sh
######################################################################
# @author : swytch (adapted from Luke Smith - lukesmith.xyz)
# @file : dwmbar
# @license : GPLv3
# @created : Wednesday May 20, 2020 18:14:14 CEST
#
# @description : set the statusbar in `dwm`
# @dependencies : `xsetroot`
######################################################################
# Handle SIGTRAP signals sent by refbar to update the status bar immediately.
trap 'update' 5
delim=" | " # Set the delimiter character.
status() { \
# Get the volume of ALSA's master volume output.
volume="$(pamixer --get-volume)"
muted="$(pamixer --get-mute)"
if [ "$muted" = "true" ]; then
printf " muted"
else
printf "$volume%%"
fi
printf "$delim"
# Wifi quality percentage and  icon if ethernet is connected.
wifi="$(grep "^\s*w" /proc/net/wireless | awk '{ print "索", int($3 * 100 / 70) "%" }')"
printf "$wifi%"
eth="$(cat /sys/class/net/enp0s25/operstate)"
if [ "up" = "$eth" ]; then
printf " / "
fi
printf "$delim"
# Will show all batteries with approximate icon for remaining power.
# Or show that the computer is plugged to a power source
# In any case, show the remaining battery percentage
AC_ON="$(cat /sys/class/power_supply/AC/online)"
for x in /sys/class/power_supply/BAT?/capacity;
do
if [ "$AC_ON" = 0 ]; then
case "$(cat "$x")" in
10[0-9]|101) printf "" ;;
100|9[0-9]) printf "$(cat "$x")%%" ;;
8[0-9]|7[0-9]) printf "$(cat "$x")%%" ;;
6[0-9]|5[0-9]) printf "$(cat "$x")%%" ;;
4[0-9]|3[0-9]) printf "$(cat "$x")%%" ;;
*) printf "$(cat "$x")%%" ;;
esac
else
printf "$(cat "$x")%%"
fi
done && printf "$delim"
# Date and time.
date '+%b. %d - %I:%M%p'
}
update() { \
# So all that big status function was just a command that quicking gets
# what we want to be the statusbar. This xsetroot command is what sets
# it. Note that the tr command replaces newlines with spaces. This is
# to prevent some weird issues that cause significant slowing of
# everything in dwm. Note entirely sure of the cause, but again, the tr
# command easily avoids it.
xsetroot -name "$(status | tr '\n' ' ')" &
wait
}
while :; do
update
# Sleep for a minute after changing the status bar before updating it
# again. We run sleep in the background and use wait until it finishes,
# because traps can interrupt wait immediately, but they can't do that
# with sleep.
sleep 60 &
wait
done