88 lines
1.7 KiB
Bash
88 lines
1.7 KiB
Bash
#!/bin/sh
|
|
# Copyright (C) 2006-2013 OpenWrt.org
|
|
# Copyright (C) 2010 Vertical Communications
|
|
|
|
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
|
|
}
|
|
|
|
pivot() { # <new_root> <old_root>
|
|
/bin/mount -o noatime,move /proc $1/proc && \
|
|
pivot_root $1 $1$2 && {
|
|
/bin/mount -o noatime,move $2/dev /dev
|
|
/bin/mount -o noatime,move $2/tmp /tmp
|
|
/bin/mount -o noatime,move $2/sys /sys 2>&-
|
|
/bin/mount -o noatime,move $2/overlay /overlay 2>&-
|
|
return 0
|
|
}
|
|
}
|
|
|
|
fopivot() { # <rw_root> <ro_root> <dupe?>
|
|
/bin/mount -o noatime,lowerdir=/,upperdir=$1 -t overlayfs "overlayfs:$1" /mnt
|
|
pivot /mnt $2
|
|
}
|
|
|
|
ramoverlay() {
|
|
mkdir -p /tmp/root
|
|
/bin/mount -t tmpfs -o noatime,mode=0755 root /tmp/root
|
|
fopivot /tmp/root /rom 1
|
|
}
|