xqflash

#!/bin/sh
#
# flash a raw image into the upgrade slot
# installed by the xqrepack tool for easy upgrading
#

. /lib/functions.sh

include /lib/upgrade

IMAGE="$1"

[ -z "$IMAGE" ] && { echo "usage: $0 <ubi-image>"; exit 1; }

[ -f "$IMAGE" ] || { echo "image file not found"; exit 2; }

img_type=$(identify $IMAGE)
[ "$img_type" = "ubi" ] || { echo "image file needs to be of type UBI, not \"$img_type\""; exit 2; }

# determine partition
r0_mtd=$(grep '"rootfs"'   /proc/mtd | awk -F: '{print substr($1,4)}')
r1_mtd=$(grep '"rootfs_1"' /proc/mtd | awk -F: '{print substr($1,4)}')
os_idx=$(nvram get flag_boot_rootfs)
mtd_cur=$(($r0_mtd+${os_idx:-0}))
mtd_nxt=$(($r0_mtd+$r1_mtd-$mtd_cur))

MTD_DEV=/dev/mtd$mtd_nxt
[ -c "$MTD_DEV" ] || { echo "unable to determine MTD partition to flash to: $MTD_DEV"; exit 2; }

# abort if any command fails
set -e

echo "flashing $IMAGE onto $MTD_DEV..."
ubiformat $MTD_DEV -f $IMAGE -s 2048 -O 2048

echo "setting nvram variables..."
nvram set flag_ota_reboot=1
nvram commit

echo "Done. You may reboot now."