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#!/bin/sh
# Copyright (C) 2010 Vertical Communications
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
determine_external_root() {
pi_include /lib/functions/extmount.sh
pi_include /lib/functions/mount.sh
local OLD_UCI_CONFIG_DIR="$UCI_CONFIG_DIR"
set_jffs_mp
determine_root_device
# extroot requires extroot and fstab config files, therefore
# we assume configuration is incomplete and not to be used if either of them
# is missing (for jffs versions of these files on squashfs image)
if [ "$jffs" = "/tmp/overlay" ] && [ -r "/tmp/overlay/etc/config/fstab" ]; then
UCI_CONFIG_DIR="/tmp/overlay/etc/config"
ER_IS_SQUASHFS=true
ER_OVERLAY_PREFIX="/tmp/overlay"
fi
# For squashfs on firstboot root_device will be tmpfs for the ramoverlay,
# unless there is a saved config, in which case it will be /dev/root,
# however in the case of a saved config, it won't be restored until after
# this script, so there won't be a config on the first boot after
# flashing a squashfs-based filesystem
# For ext2, ramdisk, or jffs2 root filesystems root_device is /dev/root
# For squashfs after firstboot, root filesystem is /dev/root
# We only use the config from the root or jffs if the root_device is
# /dev/root
[ "$root_device" = "/dev/root" ] && {
er_load_modules
[ -n "$extroot_settle_time" ] && [ "$extroot_settle_time" -gt 0 ] && {
sleep $extroot_settle_time
}
config_load fstab
config_foreach config_mount_by_section mount 1
ER_OVERLAY_ROM="/no-extroot"
[ "$rootfs_found" = "1" ] && grep -q ' /overlay ' /proc/mounts && {
pi_extroot_mount_success=true
pi_mount_skip_next=false
ER_OVERLAY_ROM="/overlay"
}
[ "$rootfs_found" = "1" ] && grep -q ' /rom ' /proc/mounts && {
pi_extroot_mount_success=true
pi_mount_skip_next=false
ER_OVERLAY_ROM="/rom"
}
}
UCI_CONFIG_DIR="$OLD_UCI_CONFIG_DIR"
}
boot_hook_add preinit_mount_root determine_external_root
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