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#
# Copyright (C) 2016 lede-project.org
#
zyxel_get_rootfs() {
local rootfsdev
if read cmdline < /proc/cmdline; then
case "$cmdline" in
*root=*)
rootfsdev="${cmdline##*root=}"
rootfsdev="${rootfsdev%% *}"
;;
esac
echo "${rootfsdev}"
fi
}
zyxel_do_flash() {
local tar_file=$1
local board=$2
local kernel=$3
local rootfs=$4
# keep sure its unbound
losetup --detach-all || {
echo Failed to detach all loop devices. Skip this try.
reboot -f
}
echo "flashing kernel to /dev/${kernel}"
tar xf $tar_file sysupgrade-$board/kernel -O >/dev/$kernel
echo "flashing rootfs to ${rootfs}"
tar xf $tar_file sysupgrade-$board/root -O >"${rootfs}"
# a padded rootfs is needed for overlay fs creation
local offset=$(tar xf $tar_file sysupgrade-$board/root -O | wc -c)
[ $offset -lt 65536 ] && {
echo Wrong size for rootfs: $offset
sleep 10
reboot -f
}
# Mount loop for rootfs_data
losetup -o $offset /dev/loop0 "${rootfs}" || {
echo "Failed to mount looped rootfs_data."
sleep 10
reboot -f
}
echo "Format new rootfs_data at position ${offset}."
mkfs.ext4 -F -L rootfs_data /dev/loop0
mkdir /tmp/new_root
mount -t ext4 /dev/loop0 /tmp/new_root && {
echo "Saving config to rootfs_data at position ${offset}."
cp -v /tmp/sysupgrade.tgz /tmp/new_root/
umount /tmp/new_root
}
# Cleanup
losetup -d /dev/loop0 >/dev/null 2>&1
sync
umount -a
reboot -f
}
zyxel_do_upgrade() {
local tar_file="$1"
local board=$(board_name)
local rootfs="$(zyxel_get_rootfs)"
local kernel=
[ -b "${rootfs}" ] || return 1
case "$board" in
nbg6817)
kernel=mmcblk0p4
;;
*)
return 1
esac
zyxel_do_flash $tar_file $board $kernel $rootfs
return 0
}
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