2 # Copyright (C) 2006-2013 OpenWrt.org
3 # Copyright (C) 2010 Vertical Communications
5 boot_hook_splice_start
() {
6 export -n PI_HOOK_SPLICE
=1
9 boot_hook_splice_finish
() {
11 for hook
in $PI_STACK_LIST; do
12 local v
; eval "v=\${${hook}_splice:+\$${hook}_splice }$hook"
13 export -n "${hook}=${v% }"
14 export -n "${hook}_splice="
16 export -n PI_HOOK_SPLICE
=
20 local hook
="${1}_hook"
21 export -n "PI_STACK_LIST=${PI_STACK_LIST:+$PI_STACK_LIST }$hook"
26 local hook
="${1}_hook${PI_HOOK_SPLICE:+_splice}"
30 local v
; eval "v=\$$hook"
31 export -n "$hook=${v:+$v }$func"
36 local hook
="${1}_hook"
39 local v
; eval "v=\$$hook"
41 local first
="${v%% *}"
43 [ "$v" != "${v#* }" ] && \
44 export -n "$hook=${v#* }" || \
47 export -n "$rvar=$first"
58 while boot_hook_shift
"$hook" func
; do
59 local ran
; eval "ran=\$PI_RAN_$func"
61 export -n "PI_RAN_$func=1"
67 pivot
() { # <new_root> <old_root>
68 /bin
/mount
-o noatime
,move
/proc
$1/proc
&& \
69 pivot_root
$1 $1$2 && {
70 /bin
/mount
-o noatime
,move
$2/dev
/dev
71 /bin
/mount
-o noatime
,move
$2/tmp
/tmp
72 /bin
/mount
-o noatime
,move
$2/sys
/sys
2>&-
73 /bin
/mount
-o noatime
,move
$2/overlay
/overlay
2>&-
78 fopivot
() { # <rw_root> <work_dir> <ro_root> <dupe?>
79 /bin
/mount
-o noatime
,lowerdir
=/,upperdir
=$1,workdir
=$2 -t overlay
"overlayfs:$1" /mnt
85 /bin
/mount
-t tmpfs
-o noatime
,mode
=0755 root
/tmp
/root
86 mkdir
-p /tmp
/root
/root
/tmp
/root
/work
87 fopivot
/tmp
/root
/root
/tmp
/root
/work
/rom
1