[package] extroot: block-mount block-extroot: Added ability to do a whole disk extroo...
[openwrt/svn-archive/archive.git] / package / block-extroot / files / 50_determine_usb_root
1 #!/bin/sh
2 # Copyright (C) 2010 Vertical Communications
3 # This is free software, licensed under the GNU General Public License v2.
4 # See /LICENSE for more information.
5
6
7 determine_external_root() {
8 pi_include /lib/functions/extmount.sh
9 pi_include /lib/functions/mount.sh
10
11 local OLD_UCI_CONFIG_DIR="$UCI_CONFIG_DIR"
12 set_jffs_mp
13 determine_root_device
14
15 # extroot requires extroot and fstab config files, therefore
16 # we assume configuration is incomplete and not to be used if either of them
17 # is missing (for jffs versions of these files on squashfs image)
18 if [ "$jffs" = "/tmp/overlay" ] && [ -r "/tmp/overlay/etc/config/fstab" ]; then
19 UCI_CONFIG_DIR="/tmp/overlay/etc/config"
20 ER_IS_SQUASHFS=true
21 ER_OVERLAY_PREFIX="/tmp/overlay"
22 fi
23
24 # For squashfs on firstboot root_device will be tmpfs for the ramoverlay,
25 # unless there is a saved config, in which case it will be /dev/root,
26 # however in the case of a saved config, it won't be restored until after
27 # this script, so there won't be a config on the first boot after
28 # flashing a squashfs-based filesystem
29 # For ext2, ramdisk, or jffs2 root filesystems root_device is /dev/root
30 # For squashfs after firstboot, root filesystem is /dev/root
31 # We only use the config from the root or jffs if the root_device is
32 # /dev/root
33 [ "$root_device" = "/dev/root" ] && {
34 er_load_modules
35 [ -n "$extroot_settle_time" ] && [ "$extroot_settle_time" -gt 0 ] && {
36 sleep $extroot_settle_time
37 }
38 config_load fstab
39 config_foreach config_mount_by_section mount 1
40 ER_OVERLAY_ROM="/no-extroot"
41
42 [ "$rootfs_found" = "1" ] && grep -q ' /overlay ' /proc/mounts && {
43 pi_extroot_mount_success=true
44 pi_mount_skip_next=false
45 ER_OVERLAY_ROM="/overlay"
46 }
47 [ "$rootfs_found" = "1" ] && grep -q ' /rom ' /proc/mounts && {
48 pi_extroot_mount_success=true
49 pi_mount_skip_next=false
50 ER_OVERLAY_ROM="/rom"
51 }
52 }
53 UCI_CONFIG_DIR="$OLD_UCI_CONFIG_DIR"
54 }
55
56 boot_hook_add preinit_mount_root determine_external_root
57