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#!/bin/sh
RAM_ROOT=/tmp/root
export BACKUP_FILE=sysupgrade.tgz # file extracted by preinit
[ -x /usr/bin/ldd ] || ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
libs() { ldd $* 2>/dev/null | sed -r 's/(.* => )?(.*) .*/\2/'; }
install_file() { # <file> [ <file> ... ]
local target dest dir
for file in "$@"; do
if [ -L "$file" ]; then
target="$(readlink -f "$file")"
dest="$RAM_ROOT/$file"
[ ! -f "$dest" ] && {
dir="$(dirname "$dest")"
mkdir -p "$dir"
ln -s "$target" "$dest"
}
file="$target"
fi
dest="$RAM_ROOT/$file"
[ -f "$file" -a ! -f "$dest" ] && {
dir="$(dirname "$dest")"
mkdir -p "$dir"
cp "$file" "$dest"
}
done
}
install_bin() {
local src files
src=$1
files=$1
[ -x "$src" ] && files="$src $(libs $src)"
install_file $files
}
run_hooks() {
local arg="$1"; shift
for func in "$@"; do
eval "$func $arg"
done
}
ask_bool() {
local default="$1"; shift;
local answer="$default"
[ "$INTERACTIVE" -eq 1 ] && {
case "$default" in
0) echo -n "$* (y/N): ";;
*) echo -n "$* (Y/n): ";;
esac
read answer
case "$answer" in
y*) answer=1;;
n*) answer=0;;
*) answer="$default";;
esac
}
[ "$answer" -gt 0 ]
}
v() {
[ "$VERBOSE" -ge 1 ] && echo "$@"
}
json_string() {
local v="$1"
v="${v//\\/\\\\}"
v="${v//\"/\\\"}"
echo "\"$v\""
}
rootfs_type() {
/bin/mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
}
get_image() { # <source> [ <command> ]
local from="$1"
local cmd="$2"
if [ -z "$cmd" ]; then
local magic="$(dd if="$from" bs=2 count=1 2>/dev/null | hexdump -n 2 -e '1/1 "%02x"')"
case "$magic" in
1f8b) cmd="zcat";;
425a) cmd="bzcat";;
*) cmd="cat";;
esac
fi
cat "$from" 2>/dev/null | $cmd
}
get_magic_word() {
(get_image "$@" | dd bs=2 count=1 | hexdump -v -n 2 -e '1/1 "%02x"') 2>/dev/null
}
get_magic_long() {
(get_image "$@" | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev/null
}
export_bootdevice() {
local cmdline bootdisk rootpart uuid blockdev uevent line
local MAJOR MINOR DEVNAME DEVTYPE
if read cmdline < /proc/cmdline; then
case "$cmdline" in
*block2mtd=*)
bootdisk="${cmdline##*block2mtd=}"
bootdisk="${bootdisk%%,*}"
;;
*root=*)
rootpart="${cmdline##*root=}"
rootpart="${rootpart%% *}"
;;
esac
case "$bootdisk" in
/dev/*)
uevent="/sys/class/block/${bootdisk##*/}/uevent"
;;
esac
case "$rootpart" in
PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-[a-f0-9][a-f0-9])
uuid="${rootpart#PARTUUID=}"
uuid="${uuid%-[a-f0-9][a-f0-9]}"
for blockdev in $(find /dev -type b); do
set -- $(dd if=$blockdev bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
if [ "$4$3$2$1" = "$uuid" ]; then
uevent="/sys/class/block/${blockdev##*/}/uevent"
break
fi
done
;;
/dev/*)
uevent="/sys/class/block/${rootpart##*/}/../uevent"
;;
esac
if [ -e "$uevent" ]; then
while read line; do
export -n "$line"
done < "$uevent"
export BOOTDEV_MAJOR=$MAJOR
export BOOTDEV_MINOR=$MINOR
return 0
fi
fi
return 1
}
export_partdevice() {
local var="$1" offset="$2"
local uevent line MAJOR MINOR DEVNAME DEVTYPE
for uevent in /sys/class/block/*/uevent; do
while read line; do
export -n "$line"
done < "$uevent"
if [ $BOOTDEV_MAJOR = $MAJOR -a $(($BOOTDEV_MINOR + $offset)) = $MINOR -a -b "/dev/$DEVNAME" ]; then
export "$var=$DEVNAME"
return 0
fi
done
return 1
}
hex_le32_to_cpu() {
[ "$(echo 01 | hexdump -v -n 2 -e '/2 "%x"')" = "3031" ] && {
echo "${1:0:2}${1:8:2}${1:6:2}${1:4:2}${1:2:2}"
return
}
echo "$@"
}
get_partitions() { # <device> <filename>
local disk="$1"
local filename="$2"
if [ -b "$disk" -o -f "$disk" ]; then
v "Reading partition table from $filename..."
local magic=$(dd if="$disk" bs=2 count=1 skip=255 2>/dev/null)
if [ "$magic" != $'\x55\xAA' ]; then
v "Invalid partition table on $disk"
exit
fi
rm -f "/tmp/partmap.$filename"
local part
for part in 1 2 3 4; do
set -- $(hexdump -v -n 12 -s "$((0x1B2 + $part * 16))" -e '3/4 "0x%08X "' "$disk")
local type="$(( $(hex_le32_to_cpu $1) % 256))"
local lba="$(( $(hex_le32_to_cpu $2) ))"
local num="$(( $(hex_le32_to_cpu $3) ))"
[ $type -gt 0 ] || continue
printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
done
fi
}
indicate_upgrade() {
. /etc/diag.sh
set_state upgrade
}
# Flash firmware to MTD partition
#
# $(1): path to image
# $(2): (optional) pipe command to extract firmware, e.g. dd bs=n skip=m
default_do_upgrade() {
sync
if [ -n "$UPGRADE_BACKUP" ]; then
get_image "$1" "$2" | mtd $MTD_ARGS $MTD_CONFIG_ARGS -j "$UPGRADE_BACKUP" write - "${PART_NAME:-image}"
else
get_image "$1" "$2" | mtd $MTD_ARGS write - "${PART_NAME:-image}"
fi
[ $? -ne 0 ] && exit 1
}
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