init

#!/bin/sh

# SPDX-License-Identifier: MPL-2.0

# Copyright © 2026 Firas Khana

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at https://mozilla.org/MPL/2.0/.

set -eu

export PATH=/usr/bin

mount -t devtmpfs devtmpfs /dev
mount -t proc proc /proc
mount -t sysfs sys /sys

modprobe loop

mdevd -C > /dev/null 2>&1 & pid="$!"

until device="$(blkid -L GLAUCUS)" && mount -o ro "$device" /media/iso; do
  sleep 1
done

mount -t erofs /media/iso/fs /media/fs-ro
mount -o size=1G -t tmpfs tmpfs /media/fs-rw

mkdir -p \
  /media/fs-rw/upper \
  /media/fs-rw/work

mount -o lowerdir=/media/fs-ro,upperdir=/media/fs-rw/upper,workdir=/media/fs-rw/work -t overlay overlay /mnt/root

for i in dev proc sys; do
  mount -M "/$i" "/mnt/root/$i"
done
for i in fs-ro fs-rw iso; do
  mount -M "/media/$i" "/mnt/root/mnt/$i"
done

kill "$pid"

exec switch_root /mnt/root /usr/bin/init