| 1 | #!/bin/sh |
| 2 | # Copyright (C) 2006-2010 OpenWrt.org |
| 3 | # Copyright (C) 2010 Vertical Communications |
| 4 | |
| 5 | mount() { |
| 6 | /bin/busybox mount "$@" |
| 7 | } |
| 8 | |
| 9 | boot_hook_add() { |
| 10 | local hook="${1}_hook" |
| 11 | local value="$2" |
| 12 | local sep=" " |
| 13 | |
| 14 | eval "$hook=\"\${$hook:+\${$hook}\${value:+\$sep}}\$value\"" |
| 15 | } |
| 16 | |
| 17 | boot_run_hook() { |
| 18 | local boot_func |
| 19 | for boot_func in $(eval "echo \"\$${1}_hook\""); do |
| 20 | $boot_func "$1" "$2" |
| 21 | done |
| 22 | } |
| 23 | |
| 24 | find_mtd_part() { |
| 25 | local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')" |
| 26 | local PREFIX=/dev/mtdblock |
| 27 | |
| 28 | PART="${PART##mtd}" |
| 29 | [ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/ |
| 30 | echo "${PART:+$PREFIX$PART}" |
| 31 | } |
| 32 | |
| 33 | jffs2_ready () { |
| 34 | mtdpart="$(find_mtd_part rootfs_data)" |
| 35 | [ -z "$mtdpart" ] && return 1 |
| 36 | magic=$(hexdump $mtdpart -n 4 -e '4/1 "%02x"') |
| 37 | [ "$magic" != "deadc0de" ] |
| 38 | } |
| 39 | |
| 40 | dupe() { # <new_root> <old_root> |
| 41 | cd $1 |
| 42 | echo -n "creating directories... " |
| 43 | { |
| 44 | cd $2 |
| 45 | find . -xdev -type d |
| 46 | echo "./dev ./overlay ./mnt ./proc ./tmp" |
| 47 | # xdev skips mounted directories |
| 48 | cd $1 |
| 49 | } | xargs mkdir -p |
| 50 | echo "done" |
| 51 | |
| 52 | echo -n "setting up symlinks... " |
| 53 | for file in $(cd $2; find . -xdev -type f;); do |
| 54 | case "$file" in |
| 55 | ./rom/note) ;; #nothing |
| 56 | ./etc/config*|\ |
| 57 | ./usr/lib/opkg/info/*) cp -af $2/$file $file;; |
| 58 | *) ln -sf /rom/${file#./*} $file;; |
| 59 | esac |
| 60 | done |
| 61 | for file in $(cd $2; find . -xdev -type l;); do |
| 62 | cp -af $2/${file#./*} $file |
| 63 | done |
| 64 | echo "done" |
| 65 | } |
| 66 | |
| 67 | pivot() { # <new_root> <old_root> |
| 68 | mount -o move /proc $1/proc && \ |
| 69 | pivot_root $1 $1$2 && { |
| 70 | mount -o move $2/dev /dev |
| 71 | mount -o move $2/tmp /tmp |
| 72 | mount -o move $2/sys /sys 2>&- |
| 73 | mount -o move $2/overlay /overlay 2>&- |
| 74 | return 0 |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | fopivot() { # <rw_root> <ro_root> <dupe?> |
| 79 | root=$1 |
| 80 | { |
| 81 | if grep -q mini_fo /proc/filesystems; then |
| 82 | mount -t mini_fo -o base=/,sto=$1 "mini_fo:$1" /mnt 2>&- && root=/mnt |
| 83 | else |
| 84 | mount --bind / /mnt |
| 85 | mount --bind -o union "$1" /mnt && root=/mnt |
| 86 | fi |
| 87 | } || { |
| 88 | [ "$3" = "1" ] && { |
| 89 | mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1 |
| 90 | dupe $1 $rom |
| 91 | } |
| 92 | } |
| 93 | pivot $root $2 |
| 94 | } |
| 95 | |
| 96 | ramoverlay() { |
| 97 | mkdir -p /tmp/root |
| 98 | mount -t tmpfs root /tmp/root |
| 99 | fopivot /tmp/root /rom 1 |
| 100 | } |
| 101 | |
