block-mount block-extroot: Bump packages versions forgetten during previous two commits
[openwrt/openwrt.git] / package / block-extroot / files / 55_determine_extroot_sysupgrade
1 #!/bin/sh
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.
5
6
7 check_set_md5sum() {
8 local er_md5sum_file
9 er_md5sum_file="${ER_OVERLAY_PREFIX}/.extroot.md5sum"
10 local er_disabled
11 if [ "${ER_OVERLAY_ROM}" = "/rom" ]; then
12 er_disabled=/tmp/whole_root-disabled
13 else
14 er_disabled=/tmp${ER_OVERLAY_ROM}-disabled
15 fi
16
17 local er_extroot_md5sum
18 if [ -f $md5sum_file ]; then
19 er_extroot_md5sum="$(cat $er_md5sum_file)"
20 fi
21
22 local er_overlay_file="${ER_OVERLAY_ROM}/etc/extroot.md5sum"
23
24 local er_extroot_overlay_md5sum
25 if [ -f "$er_overlay_file" ]; then
26 er_extroot_overlay_md5sum="$(cat $er_overlay_file)"
27 fi
28
29 if [ -z "$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"
33 mkdir -p $er_disabled
34 mount --move ${ER_OVERLAY_ROM} $er_disabled
35 fi
36 }
37
38 set_jffs_md5sum() {
39 # We do this anytime block-extroot exists, even on the first boot with
40 # no extroot defined.
41
42 local er_md5sum_file
43 er_md5sum_file="${ER_OVERLAY_PREFIX}/.extroot.md5sum"
44
45 local er_extroot_md5sum
46 if [ -f $er_md5sum_file ]; then
47 er_extroot_md5sum="$(cat $er_md5sum_file)"
48 fi
49 if [ -z "$er_extroot_md5sum" ]; then
50 dd if=/dev/urandom count=32 bs=1k 2>/dev/null | md5sum | cut -f1 -d\ >$er_md5sum_file
51 fi
52 }
53
54 determine_extroot_sysupgrade() {
55 check_skip || set_jffs_md5sum
56
57 check_skip || [ "$pi_extroot_mount_success" != "true" ] || {
58 check_set_md5sum
59 }
60 }
61
62 boot_hook_add preinit_mount_root determine_extroot_sysupgrade
63