5 [ -x /usr
/bin
/ldd
] || ldd
() { LD_TRACE_LOADED_OBJECTS
=1 $
*; }
6 libs
() { ldd $
* 2>/dev
/null |
sed -r 's/(.* => )?(.*) .*/\2/'; }
8 install_file
() { # <file> [ <file> ... ]
10 dest
="$RAM_ROOT/$file"
11 [ -f $file -a ! -f $dest ] && {
12 dir
="$(dirname $dest)"
19 install_bin
() { # <file> [ <symlink> ... ]
22 [ -x "$src" ] && files
="$src $(libs $src)"
25 for link
in "$@"; do {
26 dest
="$RAM_ROOT/$link"
27 dir
="$(dirname $dest)"
29 [ -f "$dest" ] ||
ln -s $src $dest
33 supivot
() { # <new_root> <old_root>
34 /bin
/mount |
grep "on $1 type" 2>&- 1>&- ||
/bin
/mount
-o bind $1 $1
35 mkdir
-p $1$2 $1/proc
$1/sys
$1/dev
$1/tmp
$1/overlay
&& \
36 /bin
/mount
-o noatime
,move
/proc
$1/proc
&& \
37 pivot_root
$1 $1$2 ||
{
42 /bin
/mount
-o noatime
,move
$2/sys
/sys
43 /bin
/mount
-o noatime
,move
$2/dev
/dev
44 /bin
/mount
-o noatime
,move
$2/tmp
/tmp
45 /bin
/mount
-o noatime
,move
$2/overlay
/overlay
2>&-
49 run_ramfs
() { # <command> [...]
50 install_bin
/bin
/busybox
/bin
/ash
/bin
/sh
/bin
/mount
/bin
/umount \
51 /sbin
/pivot_root
/sbin
/reboot
/bin
/sync
/bin
/dd /bin
/grep \
52 /bin
/cp /bin
/mv /bin
/tar /usr
/bin
/md5sum "/usr/bin/[" /bin
/dd \
53 /bin
/vi
/bin
/ls /bin
/cat /usr
/bin
/awk /usr
/bin
/hexdump \
54 /bin
/sleep /bin
/zcat
/usr
/bin
/bzcat
/usr
/bin
/printf /usr
/bin
/wc \
55 /bin
/cut
/usr
/bin
/printf /bin
/sync
/bin
/mkdir
/bin
/rmdir \
56 /bin
/rm /usr
/bin
/basename /bin
/kill /bin
/chmod /usr
/bin
/find \
60 install_bin
/sbin
/mount_root
61 install_bin
/sbin
/snapshot
62 install_bin
/sbin
/snapshot_tool
63 install_bin
/usr
/sbin
/ubiupdatevol
64 install_bin
/usr
/sbin
/ubiattach
65 install_bin
/usr
/sbin
/ubiblock
66 install_bin
/usr
/sbin
/ubiformat
67 install_bin
/usr
/sbin
/ubidetach
68 install_bin
/usr
/sbin
/ubirsvol
69 install_bin
/usr
/sbin
/ubirmvol
70 install_bin
/usr
/sbin
/ubimkvol
71 install_bin
/usr
/sbin
/partx
72 install_bin
/usr
/sbin
/losetup
73 install_bin
/usr
/sbin
/mkfs.ext4
74 for file in $RAMFS_COPY_BIN; do
75 install_bin
${file//:/ }
77 install_file
/etc
/resolv.conf
/lib
/*.sh
/lib
/functions
/*.sh
/lib
/upgrade
/*.sh
$RAMFS_COPY_DATA
79 [ -L "/lib64" ] && ln -s /lib
$RAM_ROOT/lib64
81 supivot
$RAM_ROOT /mnt ||
{
82 echo "Failed to switch over to ramfs. Please reboot."
86 /bin
/mount
-o remount
,ro
/mnt
89 grep /overlay
/proc
/mounts
> /dev
/null
&& {
90 /bin
/mount
-o noatime
,remount
,ro
/overlay
91 /bin
/umount
-l /overlay
94 # spawn a new shell from ramdisk to reduce the probability of cache issues
95 exec /bin
/busybox ash
-c "$*"
98 kill_remaining
() { # [ <signal> [ <loop> ] ]
99 local sig
="${1:-TERM}"
104 echo -n "Sending $sig to remaining processes ... "
108 for stat
in /proc
/[0-9]*/stat
; do
109 [ -f "$stat" ] ||
continue
111 local pid name state ppid rest
112 read pid name state ppid rest
< $stat
113 name
="${name#(}"; name
="${name%)}"
115 # Skip PID1, ourself and our children
116 [ $pid -ne 1 -a $pid -ne $$
-a $ppid -ne $$
] ||
continue
119 read cmdline
< /proc
/$pid/cmdline
121 # Skip kernel threads
122 [ -n "$cmdline" ] ||
continue
125 kill -$sig $pid 2>/dev
/null
127 [ $loop -eq 1 ] && run
=true
134 local arg
="$1"; shift
141 local default
="$1"; shift;
142 local answer
="$default"
144 [ "$INTERACTIVE" -eq 1 ] && {
146 0) echo -n "$* (y/N): ";;
147 *) echo -n "$* (Y/n): ";;
153 *) answer
="$default";;
160 [ "$VERBOSE" -ge 1 ] && echo "$@"
171 /bin
/mount |
awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
174 get_image
() { # <source> [ <command> ]
178 if [ -z "$cat" ]; then
179 local magic
="$(dd if="$from" bs=2 count=1 2>/dev/null | hexdump -n 2 -e '1/1 "%02x
"')"
187 $cat "$from" 2>/dev
/null
191 (get_image
"$@" |
dd bs
=2 count
=1 |
hexdump -v -n 2 -e '1/1 "%02x"') 2>/dev
/null
195 (get_image
"$@" |
dd bs
=4 count
=1 |
hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev
/null
198 export_bootdevice
() {
199 local cmdline uuid disk uevent
200 local MAJOR MINOR DEVNAME DEVTYPE
202 if read cmdline
< /proc
/cmdline
; then
205 disk
="${cmdline##*block2mtd=}"
209 disk
="${cmdline##*root=}"
215 PARTUUID
=[a-f0-9
][a-f0-9
][a-f0-9
][a-f0-9
][a-f0-9
][a-f0-9
][a-f0-9
][a-f0-9
]-02)
216 uuid
="${disk#PARTUUID=}"
218 for disk
in $
(find /dev
-type b
); do
219 set -- $
(dd if=$disk bs
=1 skip
=440 count
=4 2>/dev
/null |
hexdump -v -e '4/1 "%02x "')
220 if [ "$4$3$2$1" = "$uuid" ]; then
221 uevent
="/sys/class/block/${disk##*/}/uevent"
227 uevent
="/sys/class/block/${disk##*/}/uevent"
231 if [ -e "$uevent" ]; then
234 export BOOTDEV_MAJOR
=$MAJOR
235 export BOOTDEV_MINOR
=$MINOR
243 export_partdevice
() {
244 local var
="$1" offset
="$2"
245 local uevent MAJOR MINOR DEVNAME DEVTYPE
247 for uevent
in /sys
/class
/block
/*/uevent
; do
249 if [ $BOOTDEV_MAJOR = $MAJOR -a $
(($BOOTDEV_MINOR + $offset)) = $MINOR -a -b "/dev/$DEVNAME" ]; then
250 export "$var=$DEVNAME"
258 get_partitions
() { # <device> <filename>
262 if [ -b "$disk" -o -f "$disk" ]; then
263 v
"Reading partition table from $filename..."
265 local magic
="$(hexdump -v -n 2 -s 0x1FE -e '1/2 "0x
%04X
"' "$disk")"
266 if [ "$magic" != 0xAA55 ]; then
267 v
"Invalid partition table on $disk"
271 rm -f "/tmp/partmap.$filename"
274 for part
in 1 2 3 4; do
275 set -- $
(hexdump -v -n 12 -s "$((0x1B2 + $part * 16))" -e '3/4 "0x%08X "' "$disk")
277 local type="$(($1 % 256))"
281 [ $type -gt 0 ] ||
continue
283 printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
288 jffs2_copy_config
() {
289 if grep rootfs_data
/proc
/mtd
>/dev
/null
; then
291 mtd
-e rootfs_data jffs2write
"$CONF_TAR" rootfs_data
294 mtd jffs2write
"$CONF_TAR" rootfs
298 # Flash firmware to MTD partition
300 # $(1): path to image
301 # $(2): (optional) pipe command to extract firmware, e.g. dd bs=n skip=m
302 default_do_upgrade
() {
304 if [ "$SAVE_CONFIG" -eq 1 ]; then
305 get_image
"$1" "$2" | mtd
$MTD_CONFIG_ARGS -j "$CONF_TAR" write - "${PART_NAME:-image}"
307 get_image
"$1" "$2" | mtd
write - "${PART_NAME:-image}"
311 do_upgrade_stage2
() {
312 v
"Performing system upgrade..."
313 if [ -n "$do_upgrade" ]; then
315 elif type 'platform_do_upgrade' >/dev
/null
2>/dev
/null
; then
316 platform_do_upgrade
"$IMAGE"
318 default_do_upgrade
"$IMAGE"
321 if [ "$SAVE_CONFIG" -eq 1 ] && type 'platform_copy_config' >/dev
/null
2>/dev
/null
; then
325 v
"Upgrade completed"
328 v
"Rebooting system..."
332 echo b
2>/dev
/null
>/proc
/sysrq-trigger