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