#!/bin/sh set -eo pipefail block info DISK=/dev/mmcblk0 PARTITION="${DISK}p2" parted -s -a opt "$DISK" "resizepart 2 100%" FS_SIZE="$(unsquashfs -s "$PARTITION" | grep -o 'Filesystem size [0-9]* bytes' | grep -o '[0-9][0-9]*')" FS_OFFSET="$(expr '(' "$FS_SIZE" + 65535 ')' / 65536 '*' 65536)" LOOP_DEVICE="$(losetup -f --show -o "$FS_OFFSET" "$PARTITION")" e2fsck -y -f "$LOOP_DEVICE" resize2fs "$LOOP_DEVICE" rm -f /etc/uci-defaults/99-resize-disk.sh reboot