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platform_check_image() {
[ "$ARGC" -gt 1 ] && return 1
case "$(get_magic_word "$1")" in
# Freifunk .img files
4646)
local kern_name=$(dd if="$1" bs=2 skip=5 count=8 2>/dev/null); kern_name="${kern_name%% *}"
local root_name=$(dd if="$1" bs=2 skip=17 count=8 2>/dev/null); root_name="${root_name%% *}"
if grep -q '"'$kern_name'"' /proc/mtd && grep -q '"'$root_name'"' /proc/mtd; then
return 0
else
echo "Invalid image. Missing the '$kern_name' or '$root_name' partition"
return 1
fi
;;
*)
echo "Invalid image. Use combined .img files on this platform"
return 1
;;
esac
}
platform_do_upgrade() {
local kern_length=$((0x$(dd if="$1" bs=2 skip=1 count=4 2>/dev/null)/65536))
local kern_name=$(dd if="$1" bs=2 skip=5 count=8 2>/dev/null); kern_name="${kern_name%% *}"
local root_length=$((0x$(dd if="$1" bs=2 skip=13 count=4 2>/dev/null)/65536))
local root_name=$(dd if="$1" bs=2 skip=17 count=8 2>/dev/null); root_name="${root_name%% *}"
if grep -q '"'$kern_name'"' /proc/mtd && grep -q '"'$root_name'"' /proc/mtd; then
local append=""
[ -f "$CONF_TAR" -a "$SAVE_CONFIG" -eq 1 ] && append="-j $CONF_TAR"
if [ -n "$kern_name" -a -n "$root_name" ] && \
[ ${kern_length:-0} -gt 0 -a ${root_length:-0} -gt ${kern_length:-0} ];
then
dd if="$1" bs=65536 skip=1 count=$kern_length 2>/dev/null | \
mtd -e $kern_name write - $kern_name
dd if="$1" bs=65536 skip=$((1+$kern_length)) count=$root_length 2>/dev/null | \
mtd -e $root_name $append write - $root_name
fi
fi
}
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