3lpsy/x-resize, modified for my Linux from Scratch VM

x-resize-LFS

#!/bin/bash
# 3lpsy/x-resize, modified for my Linux From Scratch VM

## Ensure Log Directory Exists
LOG_DIR=/var/log/autores;
if [ ! -d $LOG_DIR ]; then
    mkdir $LOG_DIR;
fi
LOG_FILE=${LOG_DIR}/autores.log

## Function to find User Sessions & Resize their display
function x_resize() {
    declare -A disps usrs
    usrs=()
    disps=()

    for i in $(users);do
        [[ $i = root ]] && continue # skip root
        usrs[$i]=1
    done

    for u in "${!usrs[@]}"; do
        for i in $(sudo ps e -u "$u" | sed -rn 's/.* DISPLAY=(:[0-9]*).*/\1/p');do
            disps[$i]=$u
        done
    done

    for d in "${!disps[@]}";do
	    session_user="${disps[$d]}"
	    session_display="$d"
	    session_output=$(sudo -u "$session_user" PATH=/usr/bin DISPLAY="$session_display" xrandr | awk '/ connected/{print $1; exit; }')
	    echo "Session User: $session_user" | tee -a $LOG_FILE;
	    echo "Session Display: $session_display" | tee -a $LOG_FILE;
	    echo "Session Output: $session_output" | tee -a $LOG_FILE;
	    sudo -u "$session_user" PATH=/usr/bin DISPLAY="$session_display" xrandr --output "$session_output" --auto | tee -a $LOG_FILE;
    done
}

echo "Resize Event: $(date)" | tee -a $LOG_FILE
x_resize