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#!/bin/sh |
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# Copyright (C) 2006-2010 OpenWrt.org |
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# Copyright (C) 2010 Vertical Communications |
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boot_hook_splice_start() { |
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export -n PI_HOOK_SPLICE=1 |
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} |
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boot_hook_splice_finish() { |
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local hook |
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for hook in $PI_STACK_LIST; do |
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local v; eval "v=\${${hook}_splice:+\$${hook}_splice }$hook" |
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export -n "${hook}=${v% }" |
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export -n "${hook}_splice=" |
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done |
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export -n PI_HOOK_SPLICE= |
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} |
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boot_hook_init() { |
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local hook="${1}_hook" |
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export -n "PI_STACK_LIST=${PI_STACK_LIST:+$PI_STACK_LIST }$hook" |
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export -n "$hook=" |
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} |
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boot_hook_add() { |
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local hook="${1}_hook${PI_HOOK_SPLICE:+_splice}" |
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local func="${2}" |
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[ -n "$func" ] && { |
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local v; eval "v=\$$hook" |
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export -n "$hook=${v:+$v }$func" |
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} |
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} |
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boot_hook_shift() { |
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local hook="${1}_hook" |
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local rvar="${2}" |
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local v; eval "v=\$$hook" |
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[ -n "$v" ] && { |
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local first="${v%% *}" |
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[ "$v" != "${v#* }" ] && \ |
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export -n "$hook=${v#* }" || \ |
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export -n "$hook=" |
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export -n "$rvar=$first" |
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return 0 |
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} |
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return 1 |
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} |
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boot_run_hook() { |
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local hook="$1" |
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local func |
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while boot_hook_shift "$hook" func; do |
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local ran; eval "ran=\$PI_RAN_$func" |
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[ -n "$ran" ] || { |
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export -n "PI_RAN_$func=1" |
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$func "$1" "$2" |
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} |
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done |
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} |
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find_mtd_part() { |
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local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')" |
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local PREFIX=/dev/mtdblock |
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PART="${PART##mtd}" |
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[ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/ |
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echo "${PART:+$PREFIX$PART}" |
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} |
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jffs2_ready () { |
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mtdpart="$(find_mtd_part rootfs_data)" |
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[ -z "$mtdpart" ] && return 1 |
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magic=$(hexdump $mtdpart -n 4 -e '4/1 "%02x"') |
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[ "$magic" != "deadc0de" ] |
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} |
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dupe() { # <new_root> <old_root> |
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cd $1 |
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echo -n "creating directories... " |
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{ |
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cd $2 |
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find . -xdev -type d |
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echo "./dev ./overlay ./mnt ./proc ./tmp" |
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# xdev skips mounted directories |
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cd $1 |
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} | xargs mkdir -p |
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echo "done" |
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echo -n "setting up symlinks... " |
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for file in $(cd $2; find . -xdev -type f;); do |
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case "$file" in |
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./rom/note) ;; #nothing |
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./etc/config*|\ |
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./usr/lib/opkg/info/*) cp -af $2/$file $file;; |
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*) ln -sf /rom/${file#./*} $file;; |
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esac |
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done |
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for file in $(cd $2; find . -xdev -type l;); do |
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cp -af $2/${file#./*} $file |
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done |
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echo "done" |
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} |
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pivot() { # <new_root> <old_root> |
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mount -o noatime,move /proc $1/proc && \ |
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pivot_root $1 $1$2 && { |
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mount -o noatime,move $2/dev /dev |
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mount -o noatime,move $2/tmp /tmp |
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mount -o noatime,move $2/sys /sys 2>&- |
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mount -o noatime,move $2/overlay /overlay 2>&- |
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return 0 |
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} |
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} |
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fopivot() { # <rw_root> <ro_root> <dupe?> |
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root=$1 |
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{ |
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if grep -q overlay /proc/filesystems; then |
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mount -o noatime,lowerdir=/,upperdir=$1 -t overlayfs "overlayfs:$1" /mnt && root=/mnt |
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elif grep -q mini_fo /proc/filesystems; then |
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mount -t mini_fo -o noatime,base=/,sto=$1 "mini_fo:$1" /mnt 2>&- && root=/mnt |
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else |
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mount --bind -o noatime / /mnt |
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mount --bind -o noatime,union "$1" /mnt && root=/mnt |
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fi |
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} || { |
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[ "$3" = "1" ] && { |
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mount | grep "on $1 type" 2>&- 1>&- || mount -o noatime,bind $1 $1 |
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dupe $1 $rom |
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} |
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} |
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pivot $root $2 |
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} |
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ramoverlay() { |
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mkdir -p /tmp/root |
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mount -t tmpfs -o noatime,mode=0755 root /tmp/root |
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fopivot /tmp/root /rom 1 |
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} |
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