damblocks

My Simple bar script for displaying status information in river and dwl.

Fork of sbar. Written in POSIX SHELL.

Features

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

• Output to stdin(default) or a fifo(with --fifo option, at XDG_RUNTIME_DIR/damblocks.fifo).

Dependency

depends: ttf-nerd-fonts-symbols wireplumber brightnessctl coreutils sed grep awk curl cronie stow systemd

suggests: dash bluez-utils isync newsboat calcurse mpc wob

Every function that supports signaling depends on one or more of:

1. scripts
2. udev rules
3. cronjobs

Specific dependencies are listed in the SIGNALING session in this script.

Installation

To mange all the scripts, udev rules and cronjobs:

# install
make install
# uninstall
make uninstall

Usage

river with kwm

Add below in ~/.config/river/init

# my build of kwm
# https://codeberg.org/unixchad/kwm
# https://github.com/gnuunixchad/kwm
${HOME}/.local/bin/damblocks --fifo &
killall -q mpc
${HOME}/.local/bin/damblocks-mpdd

And run

exec ssh-agent river --no-xwayland

To restart the bar script

nohup damblocks --fifo >/dev/null 2>&1 &

---

river-classic with dam

Add below in ~/.config/river/init

# my build of dam
# https://codeberg.org/unixchad/dam
# https://github.com/gnuunixchad/dam
riverctl spawn "${HOME}/.local/bin/dam-run"

(dam-run)

And run

exec ssh-agent river --no-xwayland

---

dwl with bar patch

# my build of dwl
# https://codeberg.org/unixchad/dwl
# https://github.com/gnuunixchad/dwl
alias dl="exec ssh-agent ${HOME}/.local/bin/damblocks | /usr/local/bin/dwl"

Modification

• 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.

	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

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