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Simple dwm bar script with variable timing and signalling in posix

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sbar

Simple bar script for dwm and other window managers.

screenshot

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.

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Simple dwm bar script with variable timing and signalling in posix

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