openwrtv3/target/linux/x86/base-files/lib/preinit/79_move_config

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#!/bin/sh
# Copyright (C) 2012-2015 OpenWrt.org
move_config() {
local partdev
. /lib/upgrade/common.sh
if export_bootdevice && export_partdevice partdev 1; then
mkdir -p /boot
if mount -t ext4 -o ro,noatime "/dev/$partdev" /boot; then
if [ -f /boot/sysupgrade.tgz ]; then
mount /boot -o remount,rw,noatime
mv -f /boot/sysupgrade.tgz /
mount /boot -o remount,ro,noatime
fi
mount --bind /boot/boot /boot
fi
fi
}
boot_hook_add preinit_mount_root move_config