2 # Copyright (C) 2010 Daniel Dickinson
3 # This is free software, licensed under the GNU General Public License v2.
4 # See /LICENSE for more information.
9 er_md5sum_file="${ER_OVERLAY_PREFIX}/.extroot.md5sum"
11 if [ "${ER_OVERLAY_ROM}" = "/rom" ]; then
12 er_disabled=/tmp/whole_root-disabled
14 er_disabled=/tmp${ER_OVERLAY_ROM}-disabled
17 local er_extroot_md5sum
18 if [ -f $md5sum_file ]; then
19 er_extroot_md5sum="$(cat $er_md5sum_file)"
22 local er_overlay_file="${ER_OVERLAY_ROM}/etc/extroot.md5sum"
24 local er_extroot_overlay_md5sum
25 if [ -f "$er_overlay_file" ]; then
26 er_extroot_overlay_md5sum="$(cat $er_overlay_file)"
29 if [ -z "$er_extroot_overlay_md5sum" ]; then
30 cat $er_md5sum_file >$er_overlay_file
31 elif [ "$er_extroot_overlay_md5sum" != "$er_extroot_md5sum" ]; then
32 pi_extroot_mount_success="false"
34 mount --move ${ER_OVERLAY_ROM} $er_disabled
39 # We do this anytime block-extroot exists, even on the first boot with
43 er_md5sum_file="${ER_OVERLAY_PREFIX}/.extroot.md5sum"
45 local er_extroot_md5sum
46 if [ -f $er_md5sum_file ]; then
47 er_extroot_md5sum="$(cat $er_md5sum_file)"
49 if [ -z "$er_extroot_md5sum" ]; then
50 dd if=/dev/urandom count=32 bs=1k 2>/dev/null | md5sum | cut -f1 -d\ >$er_md5sum_file
54 determine_extroot_sysupgrade() {
55 check_skip || set_jffs_md5sum
57 check_skip || [ "$pi_extroot_mount_success" != "true" ] || {
62 boot_hook_add preinit_mount_root determine_extroot_sysupgrade