4 .
/lib
/functions
/system.sh
11 export CONFFILES
=/tmp
/sysupgrade.conffiles
13 RAMFS_COPY_BIN
= # extra programs for temporary ramfs root
14 RAMFS_COPY_DATA
= # extra data files
19 supivot
() { # <new_root> <old_root>
20 /bin
/mount |
grep "on $1 type" 2>&- 1>&- ||
/bin
/mount
-o bind $1 $1
21 mkdir
-p $1$2 $1/proc
$1/sys
$1/dev
$1/tmp
$1/overlay
&& \
22 /bin
/mount
-o noatime
,move
/proc
$1/proc
&& \
23 pivot_root
$1 $1$2 ||
{
28 /bin
/mount
-o noatime
,move
$2/sys
/sys
29 /bin
/mount
-o noatime
,move
$2/dev
/dev
30 /bin
/mount
-o noatime
,move
$2/tmp
/tmp
31 /bin
/mount
-o noatime
,move
$2/overlay
/overlay
2>&-
37 /bin
/busybox
/bin
/ash
/bin
/sh
/bin
/mount
/bin
/umount \
38 pivot_root mount_root reboot sync
kill sleep \
39 md5sum hexdump cat zcat bzcat
dd tar \
40 ls basename find cp mv rm mkdir
rmdir mknod
touch chmod \
41 '[' printf wc grep awk sed cut \
42 mtd partx losetup mkfs.ext4 nandwrite flash_erase \
43 ubiupdatevol ubiattach ubiblock ubiformat \
44 ubidetach ubirsvol ubirmvol ubimkvol \
45 snapshot snapshot_tool \
48 local file="$(which "$binary" 2>/dev/null)"
49 [ -n "$file" ] && install_bin
"$file"
51 install_file
/etc
/resolv.conf
/lib
/*.sh
/lib
/functions
/*.sh
/lib
/upgrade
/*.sh
/lib
/upgrade
/do_stage2
/usr
/share
/libubox
/jshn.sh
$RAMFS_COPY_DATA
53 [ -L "/lib64" ] && ln -s /lib
$RAM_ROOT/lib64
55 supivot
$RAM_ROOT /mnt ||
{
56 echo "Failed to switch over to ramfs. Please reboot."
60 /bin
/mount
-o remount
,ro
/mnt
63 grep /overlay
/proc
/mounts
> /dev
/null
&& {
64 /bin
/mount
-o noatime
,remount
,ro
/overlay
65 /bin
/umount
-l /overlay
69 kill_remaining
() { # [ <signal> [ <loop> ] ]
72 local sig
="${1:-TERM}"
76 local proc_ppid
=$
(cut
-d' ' -f4 /proc
/$$
/stat
)
78 echo -n "Sending $sig to remaining processes ... "
82 for stat
in /proc
/[0-9]*/stat
; do
83 [ -f "$stat" ] ||
continue
85 local pid name state ppid rest
86 read pid name state ppid rest
< $stat
87 name
="${name#(}"; name
="${name%)}"
89 # Skip PID1, our parent, ourself and our children
90 [ $pid -ne 1 -a $pid -ne $proc_ppid -a $pid -ne $$
-a $ppid -ne $$
] ||
continue
93 read cmdline
< /proc
/$pid/cmdline
96 [ -n "$cmdline" ] ||
continue
99 kill -$sig $pid 2>/dev
/null
101 [ $loop -eq 1 ] && run
=true
105 [ $loop_limit -eq 0 ] && {
107 echo "Failed to kill all processes."
122 kill_remaining KILL
1
127 if [ -n "$IMAGE" ] && type 'platform_pre_upgrade' >/dev
/null
2>/dev
/null
; then
128 platform_pre_upgrade
"$IMAGE"
131 if [ -n "$(rootfs_type)" ]; then
132 echo "Switching to ramdisk..."
136 # Exec new shell from ramfs
137 exec /bin
/busybox ash
-c "$COMMAND"