fullscreen.sh

#!/bin/bash

export DISPLAY=:0
export XAUTHORITY=/home/johackim/.Xauthority
export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
export APPNAME=obsidian
export WIDTH=$(xdpyinfo | grep dimensions: | awk '{print $2}' | cut -d 'x' -f1)
export HEIGHT=$(xdpyinfo | grep dimensions: | awk '{print $2}' | cut -d 'x' -f2)

for ID in $(xdotool search --name $APPNAME); do
    xdotool windowsize $ID $WIDTH $HEIGHT
    xdotool windowmove $ID 0 0
done;

# wmctrl -r $APPNAME -b toggle,fullscreen