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#!/bin/bash
ask() {
# http://djm.me/ask
local prompt default REPLY
while true; do
if [ "${2:-}" = "Y" ]; then
prompt="Y/n"
default=Y
elif [ "${2:-}" = "N" ]; then
prompt="y/N"
default=N
else
prompt="y/n"
default=
fi
# Ask the question (not using "read -p" as it uses stderr not stdout)
echo -n "$1 [$prompt] "
# Read the answer (use /dev/tty in case stdin is redirected from somewhere else)
read -r REPLY </dev/tty
# Default?
if [ -z "$REPLY" ]; then
REPLY=$default
fi
# Check if the reply is valid
case "$REPLY" in
Y*|y*) return 0 ;;
N*|n*) return 1 ;;
esac
done
}
if [[ $EUID -ne 0 ]]; then
echo ""
echo " This script must be run as root" 1>&2
echo ""
exit 1
fi
if [ -z "$1" ]; then
echo ""
echo " Flash a built image with a HERE OTA Connect device config file baked in."
echo ""
echo " Usage: ./flash-configured-image.sh device [imagefile [force]]"
echo ""
echo ""
echo " device : The device name to flash. Must be a removable device."
echo " Example: sdb"
echo ""
echo " imagefile : An image file generated by bitbake (optional)."
echo " Default: ./tmp/deploy/images/raspberrypi3/core-image-minimal-raspberrypi3.wic"
echo ""
echo " force : 1 to skip the check if device is removeable."
echo " Default: 0"
echo ""
echo " The following utilities are prerequisites:"
echo ""
echo " dd"
echo " parted"
echo " e2fsck"
echo " fdisk"
echo " resize2fs"
echo ""
exit 1
fi
set -euo pipefail
DEVICE_TO_FLASH=$1
IMAGE_TO_FLASH="${2-./tmp/deploy/images/raspberrypi3/core-image-minimal-raspberrypi3.wic}"
FORCE_WRITE=${3-0}
DEVICE_IS_REMOVABLE=$(cat "/sys/block/$DEVICE_TO_FLASH/removable")
if [[ $FORCE_WRITE != "1" && $DEVICE_IS_REMOVABLE != "1" ]]; then
echo ""
echo " For safety, this script will only flash removable block devices."
echo ""
echo " This check is implemented by reading /sys/block/$DEVICE_TO_FLASH/removable."
echo ""
exit 1
fi
echo " "
echo " Writing image file: $IMAGE_TO_FLASH "
echo " to device : $DEVICE_TO_FLASH "
echo " "
if ask "Do you want to continue?" N; then
echo " "
else
exit 1
fi
if [ ! -f "$IMAGE_TO_FLASH" ]; then
echo " "
echo " Error: $IMAGE_TO_FLASH doesn't exist"
echo ""
exit 1
fi
echo "Unmounting all partitions on $DEVICE_TO_FLASH"
umount "/dev/$DEVICE_TO_FLASH"* || true
sleep 2
echo "Writing image to $DEVICE_TO_FLASH..."
dd if="$IMAGE_TO_FLASH" of="/dev/$DEVICE_TO_FLASH" bs=32M && sync
sleep 2
# It turns out there are card readers that give their partitions funny names, like
# "/dev/mmcblk0" will be the device, but the partitions are called "/dev/mmcblk0p1"
# for example. Better to just get the name of the partition after we flash it.
SECOND_PARTITION=$(fdisk -l "/dev/$DEVICE_TO_FLASH" | tail -n 1 | awk '{print $1}')
# Check if there is a problem with the boot partition, and fix it if there is.
# parted can identify the problem but apparently can't fix it without user
# interaction.
MISMATCH=$(fdisk -l "/dev/$DEVICE_TO_FLASH" 2>&1 >/dev/null | grep "GPT PMBR size mismatch" || true)
if [ -n "$MISMATCH" ]; then
echo "Fixing GPT PMBR size mismatch."
sgdisk -e "/dev/$DEVICE_TO_FLASH"
fi
echo "Resizing rootfs partition to fill all of $DEVICE_TO_FLASH..."
parted -s "/dev/$DEVICE_TO_FLASH" resizepart 2 '100%'
sleep 2
e2fsck -f "$SECOND_PARTITION" || true
sleep 2
echo "Resizing filesystem on $SECOND_PARTITION to match partition size..."
resize2fs -p "$SECOND_PARTITION"
sleep 2
echo "Done!"
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