#!/bin/bash

# Check if /proc/cmdline exists
if [[ -f /proc/cmdline ]]; then
    # Check if booting from a Btrfs snapshot
    if grep -qE 'subvol=@/.snapshots/[0-9]+/snapshot' /proc/cmdline; then
        echo "Booting from a Btrfs snapshot."
        exit 0
    else
        echo "Not booting from a Btrfs snapshot."
        exit 1
    fi
else
    # Handle the case where /proc/cmdline is missing
    echo "Error: /proc/cmdline not found."
    exit 2
fi