591e810af90d44ebac5149eea1c48dff231d2337
1 # Copyright (C) 2006-2013 OpenWrt.org
2 # Copyright (C) 2010 Vertical Communications
4 boot_hook_splice_start
() {
5 export -n PI_HOOK_SPLICE
=1
8 boot_hook_splice_finish
() {
10 for hook
in $PI_STACK_LIST; do
11 local v
; eval "v=\${${hook}_splice:+\$${hook}_splice }$hook"
12 export -n "${hook}=${v% }"
13 export -n "${hook}_splice="
15 export -n PI_HOOK_SPLICE
=
19 local hook
="${1}_hook"
20 export -n "PI_STACK_LIST=${PI_STACK_LIST:+$PI_STACK_LIST }$hook"
25 local hook
="${1}_hook${PI_HOOK_SPLICE:+_splice}"
29 local v
; eval "v=\$$hook"
30 export -n "$hook=${v:+$v }$func"
35 local hook
="${1}_hook"
38 local v
; eval "v=\$$hook"
40 local first
="${v%% *}"
42 [ "$v" != "${v#* }" ] && \
43 export -n "$hook=${v#* }" || \
46 export -n "$rvar=$first"
57 while boot_hook_shift
"$hook" func
; do
58 local ran
; eval "ran=\$PI_RAN_$func"
60 export -n "PI_RAN_$func=1"
66 pivot
() { # <new_root> <old_root>
67 /bin
/mount
-o noatime
,move
/proc
$1/proc
&& \
68 pivot_root
$1 $1$2 && {
69 /bin
/mount
-o noatime
,move
$2/dev
/dev
70 /bin
/mount
-o noatime
,move
$2/tmp
/tmp
71 /bin
/mount
-o noatime
,move
$2/sys
/sys
2>&-
72 /bin
/mount
-o noatime
,move
$2/overlay
/overlay
2>&-
77 fopivot
() { # <rw_root> <work_dir> <ro_root> <dupe?>
78 /bin
/mount
-o noatime
,lowerdir
=/,upperdir
=$1,workdir
=$2 -t overlay
"overlayfs:$1" /mnt
84 /bin
/mount
-t tmpfs
-o noatime
,mode
=0755 root
/tmp
/root
85 mkdir
-p /tmp
/root
/root
/tmp
/root
/work
86 fopivot
/tmp
/root
/root
/tmp
/root
/work
/rom
1