build/scripts/resize2fs

#!/bin/bash

### BEGIN INIT INFO
# Provides:          resize2fs
# Required-Start:    $local_fs
# Required-Stop:
# Should-Start:
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Resize the root filesystem to fill partition
# Description:
### END INIT INFO

set -e
device="/dev/"$(lsblk -idn -o NAME | grep mmcblk0)
PARTITIONS=$(($(fdisk -l $device | grep $device | wc -l)-1))
device="/dev/"$(lsblk -idn -o NAME | grep mmcblk0)"p"$PARTITIONS
N=/etc/init.d/resize2fs

case "$1" in
  start)
		echo -e "[\e[0;32m ok \x1B[0m] Resizing SD card file-system"
		/sbin/resize2fs $device >/dev/null 2>&1
		update-rc.d -f resize2fs remove >/dev/null 2>&1
		echo -e "[\e[0;32m ok \x1B[0m] Force password change upon first login"
		chage -d 0 root
		echo -e "[\e[0;32m ok \x1B[0m] Creating 128Mb emergency swap area"
		dd if=/dev/zero of=/var/swap bs=1024 count=131072 status=noxfer >/dev/null 2>&1
		chown root:root /var/swap
		chmod 0600 /var/swap
		mkswap /var/swap >/dev/null 2>&1
		swapon /var/swap >/dev/null 2>&1
		echo "/var/swap none swap sw 0 0" >> /etc/fstab
		echo 'vm.swappiness=0' >> /etc/sysctl.conf 
		;;
   stop)
		echo -e "[\e[0;32m ok \x1B[0m] Resizing in next start"
        ;;
  *)
        echo "Usage: $N {start}" >&2
        exit 1
        ;;
esac

exit 0