amarakon/sbar

Simple dwm bar script with variable timing and signalling in posix

sbar

Simple bar script for dwm and other window managers.

Inspired by dwmblocks. Written in posix.

Features

• Modules update with variable timing.
• Signalling to update modules when needed.

Setup

• Add bar module as a function. Make sure to assign it to a variable.

update_cpu () { 
	cpu="$( grep -o "^[^ ]*" /proc/loadavg )" 
}

• Modify display function to change the positioning of output.

display () { 
	xsetroot -name " [$weather] [$memory $cpu] [$bat] [$backlight] [$vol] $time "
}

You can use printf instead of xsetroot to feed it into some other bar like lemonbar.

• If signalling needed then add

trap "update_cpu;display" "RTMIN+6"

• this will update cpu when signal 40=34+6 is given to the script (RTMIN = 34)
• to update it from external commands

kill -40 "$(cat ~/.cache/pidofbar)"

• Example from my sxhkrc

{XF86AudioRaiseVolume,XF86AudioLowerVolume}
	pulsemixer --change-volume {+,-}5 ; \
	kill -34 "$(cat ~/.cache/pidofbar)"

• Add the update information in the while loops as follows

[ $((sec % 60)) -eq 2 ] && update_cpu

To update item ever 60 seconds with an offset of 2 seconds.