# Copyright (C) 2015 OpenWrt.org
# SPDX-License-Identifier: GPL-2.0-only
#
# Modified by CicadaTAK (2026-10-03), from OpenWrt's target/linux/bcm27xx/base-files/lib/preinit/79_move_config:
# on a RAM overlay — fstools fell back to RAM because the real overlay will not mount
# (imagebuilder/vanilla/package-patches/fstools/901-cicadatak-overlay-mount-failure-ramoverlay.patch) — COPY the
# update tarball instead of moving it, so a node that reboots before its storage is repaired still restores its
# settings and identity. A healthy boot moves it, as stock does. docs/plans/overlay-mount-failure.md §3.2.
# MC_MOUNTS is a test hook (imagebuilder/tools/test-move-config.sh); preinit never sets it.

. /lib/upgrade/common.sh

move_config() {
	local partdev

	export_bootdevice && export_partdevice partdev 1 || {
		partdev=mmcblk0p1
	}

	if [ -b "/dev/$partdev" ]; then
		insmod nls_cp437
		insmod nls_iso8859-1
		insmod fat
		insmod vfat
		mkdir -p /boot
		mount -t vfat -o rw,noatime /dev/$partdev /boot
		if [ -f "/boot/$BACKUP_FILE" ]; then
			if grep -q "^overlayfs:/tmp/root / " "${MC_MOUNTS:-/proc/mounts}"; then
				cp -f "/boot/$BACKUP_FILE" /
			else
				mv -f "/boot/$BACKUP_FILE" /
			fi
			export BCM27XX_SET_ROOT_PART=1
		fi
	fi
}

boot_hook_add preinit_mount_root move_config