Edit Root Volume

#!/bin/bash

# Run in recovery `csrutil disable`
# Run in recovery `csrutil authenticated-root disable`
# On apple intel `sudo bless --folder instead of --mount`

mtn_path=~/livemount
snapshot_disk=$(mount | grep sealed | grep 'on / ' | awk '{print $1}')
parent_disk=$(echo $snapshot_disk | sed 's/s[0-9]*$//')

unmount_disk(){
    echo -e "$sexc - Unmounting disk..."
    sudo umount $mtn_path/ # Unmounts disk
    success=$?
    if [[ "$success" = "0" ]]; then # Remove mouting point if unmount sucessfull 
        echo -e "$sexc - Removing dir $mtn_path/..."
        rm -rf $mtn_path/
    else
        echo -e "$swrn - An Error Occured: $mtn_path wasn't unmounted nor removed."
        echo -e "$swrn - List of processes on $mtn_path/ :"
        lsof $parent_disk
        echo -e "$sqes - Do you want to try kill all disk related processes and retry? $syon"
        echo -ne "$spmt"; read var; echo -ne "\033[0m"
        if [[ "$var" == "y" ]]; then
            echo -e "$sexc - Trying to kill all related processes..."
            lsof $parent_disk | awk 'NR>1 {print $2}' | xargs kill -9
            unmount_disk
        fi
    fi
}

mount_disk(){
    mkdir $mtn_path # Create Mounting point
    echo -e "$smak - Attempting to mount \033[38;5;4;48;5;0;1m$parent_disk\033[0m \033[38;5;6mto \033[38;5;4;48;5;0;1m$mtn_path\033[0m."
    sudo mount -o -nobrowse -t apfs $parent_disk $mtn_path/ # Mounts root volume to mount point
    #give_ownership # Really extremely bad idea...
}

#==== Styling ====

spmt='\033[38;5;5;1m> \033[0m\033[48;5;0m' # >_
sqes='\033[48;5;0;38;5;8m[\033[38;5;4m?\033[38;5;8m]\033[0m' # [?]
scac='\033[48;5;0;38;5;8m[\033[38;5;1mx\033[38;5;8m]\033[0m' # [x]
sexc='\033[48;5;0;38;5;8m[\033[38;5;2mo\033[38;5;8m]\033[0m' # [o]
smak='\033[48;5;0;38;5;8m[\033[38;5;5m+\033[38;5;8m]\033[0m' # [+]
swrn='\033[48;5;0;38;5;8m[\033[38;5;3m!\033[38;5;8m]\033[0m' # [!]
syon='(\033[38;5;2;1my\033[38;5;0m/\033[38;5;1;1mn\033[0m)' # (y/n)

brkline() {
    col=$(( $(tput cols) - 1 ))
    for i in $(seq 0 $col); do
        if [[ $i == 0 ]]; then
        echo -ne "$1\033[0m"
        elif [[ $i == $col ]]; then
        echo -ne "$3\033[0m"
        else
        echo -ne "$2\033[0m"
        fi
    done
}

#give_ownership(){
#    echo -e "$sqes - Do you want to open a separate Terminal window to give $USER the ownership of $mtn_path ? (y/n) : "
#    read var
#    if [[ "$var" == "y" ]]; then
#        echo "Giving ownership of $mtn_path to $USER..."
#        osascript -e "tell application \"Terminal\" to do script \"clear; echo Giving ownership of $mtn_path to $USER; sudo chown -R $USER $mtn_path; exit \""
#    fi
#}

brkline '\033[38;5;4m>' '\033[38;5;4m-' '\033[38;5;4m<'
echo -e "\033[38;5;1m\033[48;5;0;1mCAUTION /!\\ \033[0m: \033[38;5;3;1mThis program is experimental run it at your own risks."
echo -e "Errors in the programm or misuse could entirely detstroy your MacOS instance\033[0m"
brkline '\033[38;5;4m>' '\033[38;5;4m-' '\033[38;5;4m<'
echo -e "$sqes - Do you wish to proceed ? $syon"
echo -ne "$spmt"; read var; echo -ne "\033[0m"
if [[ "$var" == "y" ]]; then
    mount_disk
    open $mtn_path/

    echo -e "$sqes - Update changes ? $syon"
    echo -ne "$spmt"; read var; echo -ne "\033[0m"
    if [[ "$var" == "y" ]]; then

        echo -e "$smak - Snapshot \033[38;5;4;48;5;0;1m$snapshot_disk\033[0m updated \033[38;5;6mfrom \033[38;5;4;48;5;0;1m$mtn_path/\033[0m."

        sudo bless --mount $mtn_path/System/Library/CoreServices --bootefi --create-snapshot

        echo -e "$sqes - Reboot to apply changes? $syon"
        echo -ne "$spmt"; read var; echo -ne "\033[0m"

        if [[ "$var" == "y" ]]; then

            unmount_disk

            echo -e "$sexc - Rebooting..."
            sudo reboot

        elif [[ "$var" == "n" ]]; then

            echo -e "$scac - Rebooting aborted."

            unmount_disk

        fi
    elif [[ "$var" == "n" ]]; then

        echo -e "$scac - Not updated."

        unmount_disk 

    else
        exit
    fi
fi
echo -ne "$sexc - Task completed, press \033[38;5;5;1menter\033[0m to \033[38;5;1;1mquit\033[0m."
read t