#!/bin/sh optstr="sn" function screen_resolution() { echo "setting resolution for screen recording" xrandr --output eDP1 --mode "1920x1080_60.00" } function normal_resolution() { echo "setting normal resolution" xrandr --output eDP1 --mode 2256x1504 } while getopts ${optstr} arg; do case ${arg} in s) screen_resolution;; n) normal_resolution;; ?) echo "unrecognized option: -s for screen recording -n for normal resolution";; esac done