| 1 | #!/bin/sh |
| 2 | # Copyright (C) 2006-2010 OpenWrt.org |
| 3 | # Copyright (C) 2010 Vertical Communications |
| 4 | |
| 5 | mount() { |
| 6 | /bin/busybox mount -o noatime "$@" |
| 7 | } |
| 8 | |
| 9 | boot_hook_splice_start() { |
| 10 | export -n PI_HOOK_SPLICE=1 |
| 11 | } |
| 12 | |
| 13 | boot_hook_splice_finish() { |
| 14 | local hook |
| 15 | for hook in $PI_STACK_LIST; do |
| 16 | local v; eval "v=\${${hook}_splice:+\$${hook}_splice }$hook" |
| 17 | export -n "${hook}=${v% }" |
| 18 | export -n "${hook}_splice=" |
| 19 | done |
| 20 | export -n PI_HOOK_SPLICE= |
| 21 | } |
| 22 | |
| 23 | boot_hook_init() { |
| 24 | local hook="${1}_hook" |
| 25 | export -n "PI_STACK_LIST=${PI_STACK_LIST:+$PI_STACK_LIST }$hook" |
| 26 | export -n "$hook=" |
| 27 | } |
| 28 | |
| 29 | boot_hook_add() { |
| 30 | local hook="${1}_hook${PI_HOOK_SPLICE:+_splice}" |
| 31 | local func="${2}" |
| 32 | |
| 33 | [ -n "$func" ] && { |
| 34 | local v; eval "v=\$$hook" |
| 35 | export -n "$hook=${v:+$v }$func" |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | boot_hook_shift() { |
| 40 | local hook="${1}_hook" |
| 41 | local rvar="${2}" |
| 42 | |
| 43 | local v; eval "v=\$$hook" |
| 44 | [ -n "$v" ] && { |
| 45 | local first="${v%% *}" |
| 46 | |
| 47 | [ "$v" != "${v#* }" ] && \ |
| 48 | export -n "$hook=${v#* }" || \ |
| 49 | export -n "$hook=" |
| 50 | |
| 51 | export -n "$rvar=$first" |
| 52 | return 0 |
| 53 | } |
| 54 | |
| 55 | return 1 |
| 56 | } |
| 57 | |
| 58 | boot_run_hook() { |
| 59 | local hook="$1" |
| 60 | local func |
| 61 | |
| 62 | while boot_hook_shift "$hook" func; do |
| 63 | local ran; eval "ran=\$PI_RAN_$func" |
| 64 | [ -n "$ran" ] || { |
| 65 | export -n "PI_RAN_$func=1" |
| 66 | $func "$1" "$2" |
| 67 | } |
| 68 | done |
| 69 | } |
| 70 | |
| 71 | find_mtd_part() { |
| 72 | local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')" |
| 73 | local PREFIX=/dev/mtdblock |
| 74 | |
| 75 | PART="${PART##mtd}" |
| 76 | [ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/ |
| 77 | echo "${PART:+$PREFIX$PART}" |
| 78 | } |
| 79 | |
| 80 | jffs2_ready () { |
| 81 | mtdpart="$(find_mtd_part rootfs_data)" |
| 82 | [ -z "$mtdpart" ] && return 1 |
| 83 | magic=$(hexdump $mtdpart -n 4 -e '4/1 "%02x"') |
| 84 | [ "$magic" != "deadc0de" ] |
| 85 | } |
| 86 | |
| 87 | dupe() { # <new_root> <old_root> |
| 88 | cd $1 |
| 89 | echo -n "creating directories... " |
| 90 | { |
| 91 | cd $2 |
| 92 | find . -xdev -type d |
| 93 | echo "./dev ./overlay ./mnt ./proc ./tmp" |
| 94 | # xdev skips mounted directories |
| 95 | cd $1 |
| 96 | } | xargs mkdir -p |
| 97 | echo "done" |
| 98 | |
| 99 | echo -n "setting up symlinks... " |
| 100 | for file in $(cd $2; find . -xdev -type f;); do |
| 101 | case "$file" in |
| 102 | ./rom/note) ;; #nothing |
| 103 | ./etc/config*|\ |
| 104 | ./usr/lib/opkg/info/*) cp -af $2/$file $file;; |
| 105 | *) ln -sf /rom/${file#./*} $file;; |
| 106 | esac |
| 107 | done |
| 108 | for file in $(cd $2; find . -xdev -type l;); do |
| 109 | cp -af $2/${file#./*} $file |
| 110 | done |
| 111 | echo "done" |
| 112 | } |
| 113 | |
| 114 | pivot() { # <new_root> <old_root> |
| 115 | mount -o move /proc $1/proc && \ |
| 116 | pivot_root $1 $1$2 && { |
| 117 | mount -o move $2/dev /dev |
| 118 | mount -o move $2/tmp /tmp |
| 119 | mount -o move $2/sys /sys 2>&- |
| 120 | mount -o move $2/overlay /overlay 2>&- |
| 121 | return 0 |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | fopivot() { # <rw_root> <ro_root> <dupe?> |
| 126 | root=$1 |
| 127 | { |
| 128 | if grep -q overlay /proc/filesystems; then |
| 129 | mount -t overlayfs -olowerdir=/,upperdir=$1 "overlayfs:$1" /mnt && root=/mnt |
| 130 | elif grep -q mini_fo /proc/filesystems; then |
| 131 | mount -t mini_fo -o base=/,sto=$1 "mini_fo:$1" /mnt 2>&- && root=/mnt |
| 132 | else |
| 133 | mount --bind / /mnt |
| 134 | mount --bind -o union "$1" /mnt && root=/mnt |
| 135 | fi |
| 136 | } || { |
| 137 | [ "$3" = "1" ] && { |
| 138 | mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1 |
| 139 | dupe $1 $rom |
| 140 | } |
| 141 | } |
| 142 | pivot $root $2 |
| 143 | } |
| 144 | |
| 145 | ramoverlay() { |
| 146 | mkdir -p /tmp/root |
| 147 | mount -t tmpfs -o mode=0755 root /tmp/root |
| 148 | fopivot /tmp/root /rom 1 |
| 149 | } |
| 150 | |
| 151 | |
